Peru's Wild RainforestPeru's Wild Rainforest

Stay at an Amazon eco-lodge to experience a jungle teeming with life

Paddington Bear is said to have lived in "darkest Peru" with his Aunt Lucy until she moved to the Home for Retired Bears in Lima. My suspicion is that he came from some part of the Peruvian rainforest.

Before taking this trip, I only associated the Amazon jungle with Brazil, so discovering that it includes part of Peru adds to a sense of mystery. We take a short flight from Cusco to Puerto Maldonaldo, leave surplus luggage in a travel company office, then board a motorized boat for a half-hour trip down the Madres del Dios River -- a wide, muddy tributary of the Amazon.

Gallery: Explore Peru
Gallery: Discover Lima
Gallery: See More of Peru

We hike three kilometres of trail, then spend a final half hour in a canoe being paddled across Sandoval Lake. As one guide book says, "getting there is half the fun".

In the late afternoon, after a brief recovery time in the lodge, we take a two-hour boat trip, being silently paddled around the banks of this huge oxbow lake, a non-intrusive way to observe in safety. The boat is two canoes joined by a viewing platform, catamaran style.

Lonely Planet guide to Peru
Lonely Planet guide to Lima

Every aspect of the environment seems teeming with life. It is almost sensory overload as even the air is alive with noises from the jungle. We are treated to the raucous passing of a large troupe of squirrel monkeys crashing from tree to tree.

It is understated to describe bird life as abundant as we see everything from herons to vultures. As dusk falls, there are waves of different species of birds taking turns to devour the insects -- once the night hawks have had their fill, hoards of bats swoop in the fading light.

Apparently it is just as active below the water's surface with piranhas, stingrays, and electric eels -- information that reduces the temptation of trailing your hand in the water.

We are told the story of a giant anaconda that tried to pull a dog off a boat and how the owner lost a piece of arm in a successful attempt to save his pet.

Modest-sized white caiman (from the crocodile family) watch us from the banks and only dive when our boat gets too close. Adult caiman are reputed to be formidable; we hear of another lodge where meat was thrown into the water so tourists could actually see the larger black caiman, until a lone photographer was attacked and killed.

Perhaps it's better not to disturb natural cycles. I'm content just to see the shore dotted with menacing sets of red gleams, the reflection of their eyes in flashlight beams.

The next trip around the lake leaves at six the following morning, a thick mist giving the scene a magical quality. We are rewarded with our first sighting of a family of giant otters jostling and diving and making a sound rather like Chewbacca from Star Wars.

Later, through binoculars we see them munching on part of the six kilos of fish that each adult consumes every day.

The lodge is really happy that this family is increasing; a sign that tourists are not causing much of an "ecological footprint." The lodge deserves the positive publicity produced by a BBC documentary filmed on this lake about the life of giant otters.

A guide leads a small group on a botanical walk through jungle trails. She describes the normal squawks of multi-coloured macaws, and attributes their absence this morning to the looming presence of sentinel hawks.

We hear stories about how the garlic tree protects animals sleeping among its roots. We marvel at walking trees with their many small trunks allowing them to move up to 50 centimetres a year in order to get more sunlight.

Products from the jungle are amazing in their scope and variety: everything from leaves that make lipstick to bark that can bring about abortion.

We discuss the ethics concerning the profits made by certain North American pharmaceutical companies who base various drugs on rainforest products yet provide no recognition to the country of origin.

There is one intriguing product which, when taken after fasting, is supposed to cause you to see episodes from your past, both good and bad.

Our guide tells us of his experience with a Curandero or shaman who made a potion including the bark of the kapok or ironwood tree. J. K. Rowling should come here if she needs additional inspiration to end the Harry Potter series.

Sandoval Lake Lodge is built out of ecologically correct driftwood mahogany and is partly owned by a non-profit conservation group. It provides a restful haven with excellent food, and a row of hammocks for reading and dozing through afternoon heat.

In the evenings mosquito nets are arranged around beds, although the mosquitoes are surprisingly minimal. The generator goes off at 10 p.m. sharp, ending all activity as the lodge is plunged into darkness.

Many guests are keen naturalists, like a couple from Scotland who came to see just one bird that inhabits this particular area of Peru. But we are content to watch the sunset over the water, and wonder why Paddington ever decided to leave. Darkest Peru has so much to entice you to stay.

On the web:

Sandoval Lake Lodge: www.inkanatura.com/sandovallakelodge.asp

Scientists get dirt on mystery plant

May 5, 2009, by Kim mcguire, www.stltoday.com

The quest to solve a 70-year-old mystery led Rainer Bussmann and Douglas Sharon to northern Peru to interview traditional healers, or curanderos, about a plant that seemingly vanished more than a thousand years ago.

Known as the Ulluchu, the plant turns up in ancient artwork, often seen floating over the soldiers marching off to be sacrificed or flying priests.

But while the curanderos have heard of the Ulluchu, it is not something they use. They cannot describe the plant, and it has no place in their language.

Almost eight years later, however, Bussmann and Sharon have identified the Ulluchu while showing how the plant might have played a key role in human sacrifice. Not only does it appear the plant triggered hallucinations for priests, but it also helped get the blood flowing for those on the sacrificial altar.

And in a surprising twist, the discovery may have turned up modern medical therapies for some age-old health problems.

"For the last 70 years people have been trying to identify this fruit but couldn't," said Bussmann, an ethnobotanist at the Missouri Botanical Garden. "And when our work started, I thought to myself, 'This is not going to be simple.'"

To understand how Bussmann cracked the case of the Ulluchu, the story goes back to 1930. That's when a Peruvian archaeologist first noted the appearance of a comma-shaped fruit frequently shown in the artwork of the Moche, a agriculture-based culture that lived in northern Peru from A.D. 100 to 800.

The archaeologist dubbed the fruit Ulluchu, and scientists have been trying to identify it ever since. Cousins of the papaya and wild avocado are just some of theories that have been scientifically dismantled.

Bussmann became intrigued by the Ulluchu mystery while working at the University of Texas. And in 2001, he and Sharon began conducting fieldwork in northern Peru, home of the Moche.

"We would go to these markets and people would say, 'We think we know what that is, but it's not being sold here,'" said Sharon, the retired director of the Phoebe A. Hearst Museum of Anthropology at the University of California-Berkley. "Well, one of the reasons it wasn't being used is because the Ulluchu seems to show up during sacrifices. And no one is being sacrificed anymore."

They did find some evidence in the Quechua language, where Ulluchu roughly translates to "penis pepper."

More on that later.

Still, Bussmann had to sort through more than a thousand botanical suspects in one of the most biodiverse spots in the world in hopes of singling out the Ulluchu.

Then a breakthrough.


Archeological excavations at the ancient Moche city of Sipan and the tombs of Dos Cabezas unearthed actual desiccated remains of the fruit. And true to the Quechua translation, the plant indeed has a phallic shape.

"Rainer is a first-rate taxonomist," Sharon said. "He studied every physical characteristic of these plants until he was absolutely certain we had it."

Bussmann began to suspect their elusive plant had hallucinogenic properties. Remember the flying priests? One of them appears to be holding an instrument that Bussmann believes is snuff tube.

With it, priests might inhale ground Ulluchu seeds, get high, and then commence with the sacrifices, he deduced.

"So imagine you're a priest and it's your job to convince God to stop the rain," Bussmann said. "You need some pretty strong stuff."

Bussmann began closing in on a genus of fairly common plants known as Guarea that are found throughout Peru's lowland forests.

He determined that the plants contain compounds that could cause hallucinations if the seeds were ingested. Another effect of eating those seeds would be elevated blood pressure.

Getting the blood to flow quickly would certainly aid in sacrifices, Bussmann thought. And it would explain why the soldiers about to be sacrificed appeared to have erections in the scenes that Moche drew.

What might explain that physical reaction to pending death?

"That was what really got the bell ringing for me," Bussmann said.

When Bussmann compared specimens of Guarea kept in the garden's herbarium to drawings of the Ulluchu that were unearthed about a decade ago, he knew he had a match.

"When I saw the Guarea, I thought, 'That's pretty conspicuous looking.'"

In late March, Bussmann and Sharon published their findings in a scientific journal, identifying Guarea as the mystery plant, Ulluchu. So far, no one seems to be challenging the identification.

Bussmann, director of the garden's William L. Brown Center for Plant Genetic Resources, plans to further study the plant's chemistry and suspects it might have applications as a blood pressure and erectile dysfunction treatment.

Meanwhile, archaeologists continue to dig at Moche burial sites. Because of Bussmann and Sharon's discovery, they know a little more about human sacrifices, many of which occurred during times of extreme weather events and were meant to pacify the gods.

"When life gets unsettled, people find ways to cope with it," Bussmann said. "It all makes perfect sense now."

Peruvian Stalagmites Hold Clues To Climate Change

ScienceDaily (May 16, 2009) — How will the Netherlands, dominated by water, be affected by future climate change? Dutch researcher Martin van Breukelen hopes to answer that question by analyzing stalagmites from the South American Amazon tributaries in Peru as a way to reconstruct climate changes in the past.

Information that can be used to test climate models is stored in various forms: in ice formations, plant remnants, oceans and caves. Limestone formations in caves, so-called speleothemes, provide insights into the land climate. The best-known speleothemes are stalagmites, standing formations and stalactites, hanging formations. Van Breukelen discovered stalagmites in South America that provide information about the climate over the past 13,000 years.

In order to study climate change, Van Breukelen analyzed the accumulation of oxygen isotopes in both the cave water and the stalagmite. A small quantity of fossil cave water is enclosed in the core of the stalagmite, so-called fluid inclusions. The entrapped water is just as old as the carbonate of the stalagmite in which it is trapped. The isotope ratio of this fossil water can be measured using an extraction technique. As this water has been entrapped for thousands of years it provides unique information about the climatic history.

Much climate research on the land and sea is based on the measurement of subtle changes in the ratio between stable oxygen isotopes in, for example, ice or stone formations. Isotopes of an element can have different numbers of neutrons but always contain the same number of protons. Light isotopes (¹⁶O) respond differently to climate change than heavier isotopes (¹⁸O). Climate changes result in an altered ratio of the ¹⁶O and ¹⁸O isotopes. The ratio of the different isotopic elements oxygen, carbon and hydrogen provides a lot of useful information about the climatic history. Van Breukelen uses this information to reconstruct the changes in temperature and precipitation.

Climate research reveals that even without human influence the Earth's climate was changeable in the past. To what extent humans have influenced climate change since the industrial revolution remains unclear. It should be remembered that studies into climatic history can provide insights into the natural behaviour of the climate in the past. Additionally current climate models can only be improved if more historical data become available so that the accuracy of these models can be tested. The research method used by Van Breukelen that examines stalagmites is vitally important for climate research. This method allows the accurate reconstruction of independent temperature changes and precipitation patterns from thousands of years ago.

Van Breukelen's research was funded by a grant from the NWO division WOTRO Science for Global Development. WOTRO focuses on funding innovative scientific research into development issues, especially sustainable development and poverty alleviation.

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Adapted from materials provided by NWO (Netherlands Organization for Scientific Research).

First Evidence Of Pre-industrial Mercury Pollution In The Andes

ScienceDaily (May 18, 2009) — The study of ancient lake sediment from high altitude lakes in the Andes has revealed for the first time that mercury pollution occurred long before the start of the Industrial Revolution.

University of Alberta Earth and Atmospheric Sciences PhD student Colin Cooke's results from two seasons of field work in Peru have now provided the first unambiguous records of pre-industrial mercury pollution from anywhere in the world and will be published in the May 18th Early Edition of the Proceedings of the National Academy of Sciences (PNAS).

"The idea that mercury pollution was happening before the industrial revolution has long been hypothesised on the basis of historical records, but never proven," said Cooke whose research was funded by the National Geographic Society.

Cooke and his team recovered sediment cores from high elevation lakes located around Huancavelica, which is the New World's largest mercury deposit. By measuring the amount of mercury preserved in the cores back through time, they were able to reconstruct the history of mercury mining and pollution in the region.

"We found that mercury mining, smelting and emissions go back as far as 1400 BC," said Cooke. "More surprisingly, mining appears to have began before the rise of any complex or highly stratified society. This represents a departure from current thinking, which suggests mining only arose after these societies emerged," said Cooke.

Initially, mercury pollution was in the form of mine dust, largely resulting from the production of the red pigment vermillion. "Vermillion is buried with kings and nobles, and was a paint covering gold objects buried with Andean kings and nobles," said Cooke. However, following Inca control of the mine in 1450 AD, mercury vapour began to be emitted.

"This change is significant because it means that mercury pollution could be transported over much greater distances, and could have been converted into methylmercury, which is highly toxic," said Cooke.

"All of these results confirm long-standing questions about the existence and magnitude pre-industrial mercury pollution, and have implications for our understanding of how mining and metallurgy evolved in the Andes," said Cooke.

Cooke is an interdisciplinary scientist researching human impacts on the environment. His research combines paleolimnology (the study of ancient lake sediments) with the fields of archaeology, and geochemistry. The research team included Prentiss Balcom from the University of Connecticut (USA), Harald Biester from the University of Braunschweig (Germany), and Alexander Wolfe from the University of Alberta

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Adapted from materials provided by University of Alberta, via EurekAlert!, a service of AAAS.

Dwarf In The Elfin Forests: Tiniest Frog In South America’s Andes Mountains

ScienceDaily (Apr. 6, 2009) — It fits on a fingertip: Noblella pygmaea is a midget frog, the smallest ever found in the Andes and among the smallest amphibians in the world. Only its croaking was to be heard from the leaves on the mossier ground of the “elfin forests” in the highlands of Manu National Park, before German and Peruvian herpetologists discovered the tiny little thing in south-eastern Peru.

The popular name of the new species is fitting: Noble’s Pygmy Frog has an average length of 11.4 millimeters. It was introduced in a paper recently published in the journal Copeia by Edgar Lehr, a German herpetologist at the Senckenberg Natural History Collection Dresden, and the Swiss-Peruvian ecologist Alessandro Catenazzi from the University of California at Berkeley, USA. The pygmy that fits on a fingertip was discovered during field work in the Wayqecha Research Station. Not only its small size left it undiscovered for so long. Its predominantly brown colour camougflages Noblella perfectly. But Noble’s Pygmy Frog could be spotted with the assistance of the members of the native communities adjacent to the Manu National Park.

Manu National Park is well known as “hotspot” in the lowland rainforests, a place of exuberant diversity; however the biosphere reserve also preserves vast areas of montane cloud forests, where the sempiternal mists envelop and often conceal plants and animals. In the countless ecological niches many of them were able to evolve undisturbed and are highly adapted to the cold and permanently humidity at a daily average temperature of 11° Celsius. Genetic studies show that the diversity of amphibians in general and especially in this region is highly underestimated. That is why Edgar Lehr and Alessandro Catenazzi think that Noblella pygmaea is only one of many undiscovered amphibians in the Andes mountain area. The scientists expect to find other new species during the next few years.

Currently the midget frog is one of the smallest vertebrates ever found above 3000 metres, where most species tend to be larger than congeneric or similar species in lowland areas. Noblella pygmaea inhabits the cloud forest, the montane scrub and the high-elevation grasslands at a height from 3025 to 3190 metres above sea level. Beside its size the remarkably long forefinger is a notable distinguishing feature that was not found at other pygmy frogs in the mountains of Peru. The females lay only two eggs of approximately four millimeter in diameter. In contrast to most amphibian species these eggs are laid in moist, terrestrial microhabitats, such as in moss or leave litter, and are protected from insect predators by the mother frog. It is noteworthy also that embryos do not change into aquatic tadpoles, but immediately after the hatching lead a fully terrestrial life.

Whilst the scientists cannot give a reason for Noblella’s minute size, it is apparently advantageous. Maybe it is perfectly adopted to its special niche. The fact, that the species is not forced to leave its habitat – not even for egg deposition – might protect it from natural enemies. Despite living in the Manu Biosphere Reserve the survival of the midget frog and of other amphibians is uncertain. Several adverse influences such as anthropogenic habitat changes and the effects of global warming, which among other things facilitates the dispersal of the highly virulent pathogenic fungus Batrachochytrium dendrobatidis threaten amphibians of the Andean region. Fotunately the fungus, which has become epidemic, has not been noticed on Noblella so far. Possibly because of its terrestrial life Noblella is less exposed to the fungus than stream-dwelling frogs.

Batrachochytrium dendrobatidis is suspected to be the cause of the extinction of many frog species in Ecuador and northern Peru and is currently decimating populations of high-elevation frogs in southern Peru. Up to now no effective means are known for stopping the expansion of fungal infections in the region. Researchers hope that the large topographic heterogeneity of the Andes cordilleras will provide refugia where the fungus is unable to cause massive population declines in amphibian species, thus ensuring the survival of the dwarf in the Andean "elfin forests."

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Adapted from materials provided by Senckenberg Research Institute and Natural History Museum, via AlphaGalileo.

Evidence From Dirty Teeth: Ancient Peruvians Ate Well

ScienceDaily (Dec. 3, 2008) — Starch grains preserved on human teeth reveal that ancient Peruvians ate a variety of cultivated crops including squash, beans, peanuts and the fruit of cultivated pacay trees. This finding by Dolores Piperno, staff scientist at the Smithsonian Tropical Research Institute and the National Museum of Natural History, and Tom Dillehay, professor of archaeology at Vanderbilt University, sets the date of the earliest human consumption of beans and pacay back by more than 2,000 years and indicates that New World people were committed farmers earlier than previously thought.

In northern Peru’s Ñanchoc Valley, Dillehay and colleagues recovered human teeth from hearths and floors of permanent, roundhouse structures. Human bone, plant remains and charcoal closely associated with the teeth are approximately 6,000 to 8,000 years old according to carbon- dating techniques.

Piperno examined 39 human teeth, probably from six to eight individuals. “Some teeth were dirtier than others. We found starch grains on most of the teeth. About a third of the teeth contained large numbers of starch grains,” Piperno said.

To identify the starch grains, Piperno compared the particles in tooth scrapings with her modern reference collection of starch grains from more than 500 economically important plants. “We found starch from a variety of cultivated plants: squash, Phaseolus beans—either limas or common beans, possibly, but not certainly the former, pacay and peanuts,” said Piperno. “Parts of plants that often are not evident in archeological remains, such as the flesh of squash fruits and the nuts of peanuts, do produce identifiable starch grains.”

Starch from squash found on the teeth affirms that early people were eating the plants and not simply using them for nonfood purposes, such as for making containers or net floats. Whether or not some of the earliest cultivated plants, such as squashes, were grown as dietary items has been a long-debated question among students of early agriculture.

Evidence that foods had been cooked was also visible on some of the starch grains. “We boiled beans in the lab to see what cooked starch grains looked like—and recognized these gelatinized or heat-damaged grains in the samples from the teeth,” said Piperno. Starch from raw and roasted peanuts looks similar, probably because it is protected within the hull.

Starch grains from four of the crops were found consistently through time indicating that beans, peanuts, squash and pacay were important food sources then, as they are today. “Starch analysis of teeth, which, unlike other archaeobotanical techniques, provides direct evidence of plant consumption, should greatly improve our ability to address other important questions in human dietary change relating to even earlier time periods,” said Piperno.

The results of this study appear online in Proceedings of the National Academy of Sciences, the week of Dec. 1-5, 2008.

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Adapted from materials provided by Smithsonian Tropical Research Institute, via EurekAlert!, a service of AAAS.

Oil And Gas Projects In Western Amazon Threaten Biodiversity And Indigenous Peoples

ScienceDaily (Aug. 14, 2008) — The western Amazon, home to the most biodiverse and intact rainforest left on Earth, may soon be covered with oil rigs and pipelines.

According to a new study, over 180 oil and gas "blocks" – areas zoned for exploration and development – now cover the megadiverse western Amazon, which includes Bolivia, Colombia, Ecuador, Peru, and western Brazil. These oil and gas blocks stretch over 688,000 km2 (170 million acres), a vast area, nearly the size of Texas.

For over three years, researchers from two U.S. non-profit organizations – Save America's Forests and Land Is Life – and scientists from Duke University tracked hydrocarbon activities across the region and generated a comprehensive map of oil and gas activities across the western Amazon. The result is an alarming assessment of the threats to the biodiversity and indigenous peoples of the region.

"We found that the oil and gas blocks overlap perfectly with the most biodiverse part of the Amazon for birds, mammals, and amphibians," said study co-author Dr. Clinton Jenkins of Duke University. "The threat to amphibians is of particular concern because they are already the most threatened group of vertebrates worldwide."

The study also found that the oil and gas blocks are concentrated in the most intact part of the Amazon. Even national parks are not immune; exploration and development blocks cover the renowned Yasuní National Park in Ecuador and Madidi National Park in Bolivia.

"The most dynamic situation is unfolding in the Peruvian Amazon," warned lead author Dr. Matt Finer of Save America's Forests.

The study reports that 64 oil and gas blocks cover approximately 72% of the vast Peruvian Amazon (~490,000 km2 or ~121 million acres), an area much larger than California. All but eight of these blocks have appeared since 2003, when Peru launched a major effort to boost exploration across the Amazon. National parks are off limits to hydrocarbon activities in Peru, but oil and gas blocks do overlap a variety of other types of protected areas.

Many of the oil and gas blocks in the western Amazon overlap titled lands of indigenous peoples and encroach on the territories of indigenous peoples in voluntary isolation. These isolated peoples have chosen to live in the forests without contact with the outside world. They are extremely susceptible to outside illnesses due to lack of natural resistance.

In the second part of the study, the researchers delve into the most cutting policy issues related to oil and gas activities in the Amazon.

The authors highlighted new access roads as the greatest single threat from hydrocarbon development. Roads trigger deforestation, colonization, overhunting, and illegal logging in previously remote areas.

"The elimination of new oil access roads could significantly reduce the impacts of most projects," said Finer, echoing one of the studies' main conclusions.

The analysis points out that the current environmental assessment process is inadequate due to a lack of independence in the review process and a lack of comprehensive analyses of the long-term, cumulative, and synergistic impacts of multiple oil and gas projects across the wider region. The authors stress the need for regional Strategic Environmental Assessments in order to correct this situation.

The study also addresses the complex policy issues related to indigenous peoples.

"The way that oil development is being pursued in the Western Amazon is a gross violation of the rights of the indigenous peoples of the region" said Brian Keane of Land is Life, "International agreements and Inter-American human rights law recognize that indigenous peoples have rights to their lands, and explicitly prohibit the granting of concessions to exploit natural resources in their territories without their free, prior and informed consent."

The authors also detail the growing conflict of hydrocarbon activities slated for the territories of indigenous peoples in voluntary isolation.

Finally, the study highlights the role of the international community. Growing global energy demand is driving the search for more oil and gas in the Amazon and companies from the U.S., Canada, Europe, and China are carrying out most of the development.

"Filling up with a tank of gas could soon have devastating consequences to rainforests, their peoples, and their species" remarked co-author Dr. Stuart Pimm of Duke University.

Ecuador's innovative Yasuní-ITT Initiative is held up as a potentially precedent-setting example of how the global north and south can collaborate on both protecting the Amazon and combating climate change. The initiative is the Government of Ecuador's limited-time offer to keep its largest untapped oilfields unexploited in exchange for financial compensation from the international community.

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Journal reference:

1. Finer et al. Oil and Gas Projects in the Western Amazon: Threats to Wilderness, Biodiversity, and Indigenous Peoples. PLoS One, 2008; 3 (8): e2932 DOI: 10.1371/journal.pone.0002932

Adapted from materials provided by Public Library of Science, via EurekAlert!, a service of AAAS.

Rain Forest Protection Works In Peru

Source: Carnegie Institution
Date: August 15, 2007

Science Daily — A new regional study shows that land-use policies in Peru have been key to tempering rain forest degradation and destruction in that country. Scientists at the Carnegie Institution's Department of Global Ecology led an international effort to analyze seven years of high-resolution satellite data covering most (79%) of the Peruvian Amazon for their findings. The work is published in the August 9, 2007, on-line edition of Science Express.

The scientists found that the government's program of designating specific regions for legal logging, combined with protection of other forests, and the establishment of territories for indigenous peoples helped keep large-scale rain forest damage in check between the years 1999 and 2005. However, the research also showed an increase in forest disturbance over the last couple of years of the study, primarily in two areas of the jungle where the forests are accessible by roads.
"We found that only 1 to 2 % of this disturbance in Peru happened in natural protected areas," noted lead author Paulo Oliveira. "However, there was substantial forest disturbance adjacent to areas set aside for legal logging operations. This leakage of human activity outside of logging concessions is a concern."
Peru has about 255,000 square miles of tropical forests--an area a little larger than France. In 2001, the Peruvian government placed 31% of the managed forests into "permanent resource production." By 2005, a region about the size of Honduras (about 40,000 sq. miles)--was put into long-term commercial timber production. In recent years, the rain forests have been experiencing increased human impacts, as they have in neighboring Amazon countries, but the extent of the damage over the region has not been thoroughly assessed using high spatial resolution satellite data until this study.
The scientists used the Carnegie Landsat Analysis System (CLAS) in their work. It was formerly used in Brazil to detect logging activities there. CLAS is a satellite-based forest-damage detection system, which can penetrate the shielding upper layers of forest leaves to see consequences of logging activities below. The CLAS system can uncover forest changes at a resolution of less than 100 by 100 ft. The core process behind CLAS is an advanced signal processing approach developed by study lead Greg Asner.
"Our approach has improved over the past eight years, but relies on a core set of methods that have consistently worked," Asner said. "We spent years developing them in Brazil, then went to Peru and completed this study in only a year. We are now operating over Borneo. Our approach is proving a good way to monitor rain forest disturbance and deforestation anywhere in the world."
The researchers found that, between 1999 and 2005, disturbance and deforestation rates averaged only 244 square miles and 249 square miles per year respectively. About 86% of the damaged Peruvian areas were concentrated in two regions--in the Madre de Dios, east of Cuzco, and in the central eastern part of the country near Pucallpa. Most of the rain forest damage--75%--was found within 12.5 miles (20 km) of the nearest roads. However, even within those limits, forests set aside by the government were more than 4 times better protected than areas not designated for conservation.

Related links:
About Macaw clay lick
Macaw recover project at Manu Wildlife Center

New flycatcher bird species discovered in Peru

mongabay.com
August 13, 2007
Scientists have discovered a previously unknown species of bird in dense bamboo thickets in the Peruvian Amazon.

Writing in the journal The Auk, authors led by Daniel F. Lane of the Louisiana State University Museum of Natural Science describe the new species of twistwing (Cnipodectes superrufus).

The scientists say the brownish-red colored bird (with colors of various body parts ranging from "mahogany red", "auburn", "burnt sienna", "Sanford's Brown", "chestnut brown", "Argus brown", "Xanthine orange", "Prout's brown", "Vinaceous-Fawn" and "raw umber" among other shades of brown) remained unknown until the present due to its poorly known, and largely inaccessible habitat: thickets of thorny bamboo (Guadua weberbaueri) in southeastern Peru. The researchers not that while the species was only recently discovered, it may prove to be a common species with "immense blocks of Guadua-dominated terra firme forest in southwestern Amazonian Brazil, southeastern Peru, and northwestern-most Bolivia." Further, some of the birds were spotted within the Manu Biosphere Zone, a large protected area.

"Presumably, there is a healthy population within this protected zone," write the authors. Relatively little is known about the species. It apparently eats small arthropods (mostly insects) and has a call similar to that of the Sulfur-bellied Tyrant-Manakin (Neopelma sulphureiventer). While C. superrufus was only just now described, the "type specimen" was first captured on February 22, 1990. The specimen was deposited at the Museo Nacional de Historia Natural de la Universidad San Marcos and remaind unstudied until 2002. Subsequent trips to its native habitat turned up recordings and more specimen. Daniel F. Lane, Grace P. Servat, Thomas Valqui H.A, and Frank R. Lambert (2007). A DISTINCTIVE NEW SPECIES OF TYRANT FLYCATCHER (PASSERIFORMES: TYRANNIDAE: CNIPODECTES) FROM SOUTHEASTERN PERU. THE AUK Volume 124, Issue 3 (July 2007)

Related links :
More about Manu National park
About Thomas Valqui
Manu National park tours
Manu park map

In Peru, the discovery of a waterfall draws tourists

BY STEVE HENDRIX
Washington Post Service

Here I am in remotest northern Peru, hard on the trail of the world's third-largest anticlimax.
This is a story of waterfalls and expectations, and you can count me a waterfall skeptic. I know they are picturesque. I know they are soothing, in that stock greeting-card way of rainbows and unicorns. I know they figure largely in the preflight videos they show on planes to take the edge off your airport rage.
But actual waterfalls? They're seldom worth the walk. Somebody always insists on taking the two-mile side trail to see the local waterfall. And so you go. And there's a waterfall, dribbling (picturesquely) down the rocks. And then you hike back.
In my experience, waterfall equals anticlimax.
But the press release that crossed my desk last year was darned near irresistible: ''World's Third Highest Waterfall Discovered in Peru.'' Howzat? Discovered? The Age of Discovery was ages ago. The biggest things they discover these days are new species of beetle and, every now and then, a forgotten cable network. But the major landforms were all mapped out long ago.
A 250-story waterfall that instantly climbs up on the podium with Venezuela's Angel Falls and South Africa's Tugela Falls? How did that avoid the unblinking eye of satellite cartographers?
Who cares? If it was that big and that remote, I just wanted to get there before they bulldozed a road, built the hotels and generally tarted up the place.
And so in September, I set off on the most harrowing waterfall side trip of all: an overnight flight from Washington to Lima, a dawn hop to the northern coastal city of Chiclayo and a 12-hour drive over dicey mountain roads to Peru's impossibly secluded upper Amazon basin.
This high, dry tropical Shangri-La was the domain of the Chachapoyas, a mysterious Andean race that predated the Incas. The new waterfall, dubbed Gocta after an ancient Chachapoyan village, is deep in one of the many blind valleys they inhabited between 800 and 1400 AD. You can still see their carved tombs, some with intact mummies, in the surrounding cliff walls.
According to the press release, the government of Peru was hard on the case, promising safe tourist access and basic accommodations. In the meantime, getting to Gocta requires bone-jarring days on the terrifying roads and hours on steep and dubious valley trails. All to see a waterfall.
This had better be good.
THE `DISCOVERY'
So how do you discover a waterfall? The local people knew about it, of course. It just wasn't a big deal to them.
Luis Chuquimes is an elder in the tiny village of San Pablo, a few hours' hike from the falls. Tourists were unknown in San Pablo before word spread about Gocta last spring. Now Chuquimes' little cantina serves as an unofficial visitors center. According to the wrinkled sign-in book on his bar, more than 70 people had made the trip by the time I got there at the end of the dry season. On the other side of the valley, another village has logged just over 1,000 Gocta tourists.
It's mostly Peruvians coming so far, eager to make the acquaintance of a new national icon. A couple of Israelis and Germans have been. No Americans have signed in yet. (Now that boggles the mind.)
''We knew it was there,'' Chuquimes said as he busily delivered bottles of beer and Inca Kola to a group of Gocta-bound students from Chiclayo, a day's drive away. ``But we didn't know it was one of the tallest in the world.''
It took a German engineer named Stefan Ziemendorff, working on a nearby water project, to realize that the nameless falls might boast world-class specs. He got the Peruvian government to survey it, checked his National Geographic stats and called a press conference. Gocta came in at 2,532 feet, which put it, by Ziemendorff's reckoning, at No. 3 in the world.
Or not. It turns out that waterfall ranking is, well, rancorous. Waterfall people -- who are a lot like train people and lighthouse people -- are burning up the discussion boards, debating Gocta's place on the charts with fierce references to seasonal flow, degree of slope and something called ''freeleap.'' (Partisans of certain Norwegian cascades have bordered on rude.)
All of which makes Peru's bold claim such a brilliant stroke of marketing. Whether or not Gocta deserves the bronze, ''third highest'' gives it instant Seven Wonders cred. That ensures tourist interest in a spectacular but little-known region that really does have a lot to offer anyone lured in. After all, billboard attractions are often not as fun as the areas that surround them. The Hanging Gardens, for example, may have been a wow, but you know the real treat was knocking about the back roads of Babylon.
''I don't know if it's the third-highest waterfall on Earth, but I know it's a very high waterfall,'' said Peter Lerche, a German anthropologist who has lived here since 1980. ``It gives us a diversity of attractions. We have rivers, lakes, archaeology and now this waterfall.''
The Chachapoyas area of northern Peru already attracts two kinds of tourists: birders and a trickle of hard-core archaeology buffs, those who have already seen (or been turned off by) the hugely popular Machu Picchu (so commercial in places you might call it Inca Inc.). That was my toehold in the region.
I found a guide company in the region willing to take me to the waterfall and show me around the archaeological highlights during a six-day flying visit. They paired me with another tourist, a California antiques dealer, who was fishing around for a Gocta visit. Add a photographer from Lima and we would make a threesome.
GOING TO KUELAP
We convened in the tiny airport parking lot in Chiclayo, piled into one of the ubiquitous hired white Corollas that rattle around Peru and began to climb the Andes. The highway from the coast was flat and paved, lined with beige villages and the colorful political graffiti of the recent election.
In the foothills, the road climbed through an arid, Maui tropicality where cacti grew in the shadow of papaya trees. But six hours on, the pavement ended and the rest of the day was spent lurching on a rope ladder of a road that clung to the cliffs above the frisky Utcubamba River.
Unless you regularly holiday in Bangladesh during the monsoon, these will be the worst roads you've ever seen: pitted, shoulderless one-lane threads draped along the lips of bottomless Andean voids. They are not so bad in the daylight, when the splendid scenery is both compensation and diversion. But when you're trying to sleep (our first sightseeing trip started at 3 a.m.), a radically rough road is a kind of torture.
Yet you get used to it. Mostly because the destinations are more wonderful than the roads are awful.
Our base was in the city of Chachapoyas (which is the name of the ancient civilization and the current biggest town). It's a pretty mountaintop berg of about 17,000 people, with numerous Internet cafes, one good steakhouse and a tradition of awful coffee. From there, our first outing was 2 ½ hours to Kuelap, a walled Chachapoyas city perched grandly on a commanding peak.
At almost 20 acres, Kuelap is actually bigger than Machu Picchu. It's a huge stone battlement with two narrow crevices allowing access to the ruins within.
At daybreak, we stood amid the carefully carved stone foundations of ancient Chachapoyas houses -- there were more than 400 of them in Kuelap at one time, before the Incas, invading from the south, conquered the region in the late 1400s.
The view is 360 degrees of forever. A morning moon hung over a distant ridge even as dawn fired the tips of surrounding peaks. Soft morning murmurs and a little tin-pot clatter floated up from the dark, misty villages below.
Flocks of parakeets darted from tree to tree, reminders that this starkly beautiful mountainscape is the upper edge of Amazonia. They were only cackling shadows until they flew through columns of sunlight and flashed a sudden brilliant green.
Except for a crew of local restoration workers and a group of six Austrian students, we had this majestic enormity to ourselves. Kuelap, by far the signature tourist attraction in the region, had just over 10,000 visitors last year. Machu Picchu saw more than 410,000.
We got a deep briefing on Chachapoyas history from Lerche, the anthropologist, that night at his brother-in-law's hotel, a charming colonial-era hacienda near the river. Numbering nearly half a million at their peak, the Chachapoyas were taller and paler than the Incas who eventually overwhelmed them. At least one scholar argues they may have been the lost tribe of Israel.
Like the mystical, mysterious Anasazi of the southwestern United States, the Chachapoyas left a vast and scattered archaeological record in dry mountain cliffs. Most of them are yet undiscovered.
''Personally, I know of more than 350 sites,'' Lerche said.
One of the best, Lerche said, was a massive necropolis discovered by looters, a grave robbery that ended up founding a remarkable local museum.
In 1996, in a high alcove above the nearby Lake of the Condors, a group of workers found a huge cache of ceramics, textiles and almost 220 perfectly preserved human mummies dating back more than 500 years. The looters pilfered some, but infighting among them quickly led someone to spill the beans to the authorities. What was left is now housed in the Leymebamba Museum at the far end of the valley, a little Smithsonian in the heart of nowhere.
It took another three-hour lurch-fest to reach the tiny village of Leymebamba. But all the shaking was forgotten when we entered the stylish, modern museum. The textiles and pots alone are worth the trip.
But it's the glassed-in chamber of mummies that will grab you by the retinas. The scores of desiccated men, women and children are clearly visible, tucked in tight fetal curls and draped in moody white gauze. Hollow eyes peek between bony fingers, giving them expressions both terrible and bashful.
Marcelita Hidalgo, a white-coated technician, took a withered little man from the shelf and showed us tiny threads tied around his fingers and how his ankle tendons, like all the mummies', were cut to make him fold more compactly.
We were the only (living) people there. I was growing to adore this place.
A MISTY WRAITH
Until now, the tourist itinerary around Chachapoyas has been limited to a circuit of ancient relics and ruins: Kuelap, the mummies of Leymebamba, the intact tombs known as Karajia we would visit on our final day. But now, there's a major waterfall to fit in.
''We've never seen this much interest in the area,'' said our expat English guide, Rob Dover, who started his Chachapoyas-based Vilaya Tours eight years ago. ``It's all Gocta, Gocta, Gocta now.''
Like any outing here, the approach to Gocta begins with a bumpy few hours in the van, this time climbing a steep valley up to the village of San Pablo. Gocta is a two-tiered waterfall; it plummets over the ridge and hits a shelf on the cliff, where it pools up for a few hundred feet before falling over the edge to the valley floor. If you want an up-close look at both sections, you have to make two trips.
The gateway to Upper Gocta is San Pablo, an isolated, attractive hamlet of mud-brick buildings and wide Andean views. Tourists have become more common, but not normal enough to prevent a parade of dogs and marveling kids from falling in behind us as we walked up the only street.
At the end of town, a drunk blocked the trail, haranguing our local guide about the increased foot traffic past his house. A local loco, the guide whispered to us.
We moved on, settling into a blissful morning of hiking in a dry, wide vale. After a couple of hours, we passed the limit of usual village activity and a raw forest gloom closed over our heads. The guide pointed us down a newly slashed side trail, a steep scramble down to a small viewpoint. We huffed out of the trees and there, still two miles away at a distant end of the valley, was the world's third-highest waterfall.
This is the moment that I usually stare for a minute, say ''Oooh,'' bounce my knees Chevy Chase-style a couple of times and then turn in search of the hotel bar. But this . . . this was a really, really big waterfall. Even after four days of hard travel, hundreds of miles of chiropractic roads and impossible emotional windup, I was simply awed.
Gocta, at this time of year, is a misty wraith dancing with gravity, a huge, twisting white column of froth chasing itself down the cliff face. It made an immense noise. Even two miles away we could feel its strange clackety vibe, like an infinite train over a bad track. In the rainy season it must shake the world.
We sat for an hour, having lunch and getting our brains around Gocta. It took another hour to reach the upper base of the falls, where I picked my way over soaking rocks to look down at the thundering impact zone 50 yards away. The boulders within the falls were red with some mineral patina, or maybe just raw from centuries of flaying. I was soaked in seconds, looking up to bathe my face in an ecstasy of proximity.
Then, feeling oddly rushed, as if the promised tourist boom was about to appear on the trail, I stripped off my clothes and dove into the freezing pool. (OK, I lowered myself gingerly into the freezing pool.)
THE LOWER FALLS
There are no safe trails connecting the upper and lower sections of Gocta, so we backtracked to the van. By dusk, we had reached the other side of the valley and the tiny village of Cocachimba, gateway to Lower Gocta.
Dover asked around and arranged for us to camp in the yard of an Adventist church. He paid a neighbor woman to stir up her outdoor fire and boil us some fine chicken and rice. We ate, fended off stray dogs and played with our cook's two sweet and baffled children. We turned in, in utter silence under bright stars.
Of the 20 or so Adventist parishioners who showed up for the 5 a.m. singing service, about 15 of them tripped over my tent line.
It took us about three hours to reach the true bottom of the waterfall, a natural rock amphitheater where Gocta releases its final energy in an everlasting explosion of wet.
When the falls are running at their max, the guide said, the entire end of the valley is consumed and unapproachable. But in September, we were able to scramble to the edge of the pool. I even put on my hardiest rain gear, thinking I might get close enough to touch Gocta's very hem. Bad idea. Within 20 yards, the shrieking blow of mist nearly tossed me off my feet.
I slunk away in a soggy crouch, about as happy as I'd ever been.
No doubt they will make this easier in coming years. But they will not make it better. Paved roads, nearby hotels, scenic overlooks will allow more people to see this place, which is good. And they will mean more money for local people, which is great. But I was glad to fight for it a bit, glad to have jumped bare into the thing and elbowed my way into the hurricane heart of its final plunge.
By the end, I didn't visit this waterfall. I had an affair with it. And that was more than I ever expected.
IF YOU GO
• GETTING THERE: Reaching Chachapoyas in northern Peru takes time and, lately, money. In addition to the fare to Lima, the onward flight to the northern coastal city of Chiclayo will cost you $150 to $200 round trip. Lan Peru dominates the route and has ticket and baggage agreements with American. The long overland trip from Chiclayo to the Chachapoyas region will usually be wrapped into your tour, but inexpensive overnight buses are available if you go on your own.
• SEEING GOCTA: You can go in the dry season, traditionally May through September, and have an easier trip but a smaller waterfall. Or you can go with the rains and have a wetter experience all around.
Be aware that the waterfall is in the moderate Andes, 8,000 to 10,000 feet in elevation. Bring light fleece and rainwear at all times of year. The Peruvian government and local tour operators are falling all over themselves to make seeing Gocta easier. But for now you pretty much have to rough it with one of the archaeological tour companies already there.

Earliest-known Evidence Of Peanut, Cotton And Squash Farming Found

Source: Vanderbilt University
Date: June 29, 2007

Science Daily — Anthropologists working on the slopes of the Andes in northern Peru have discovered the earliest-known evidence of peanut, cotton and squash farming dating back 5,000 to 9,000 years. Their findings provide long-sought-after evidence that some of the early development of agriculture in the New World took place at farming settlements in the Andes.

The discovery was published in the June 29 issue of Science.

The research team made their discovery in the Ñanchoc Valley, which is approximately 500 meters above sea level on the lower western slopes of the Andes in northern Peru.

"We believe the development of agriculture by the Ñanchoc people served as a catalyst for cultural and social changes that eventually led to intensified agriculture, institutionalized political power and new towns in the Andean highlands and along the coast 4,000 to 5,500 years ago," Tom D. Dillehay, Distinguished Professor of Anthropology at Vanderbilt University and lead author on the publication, said. "Our new findings indicate that agriculture played a broader role in these sweeping developments than was previously understood."

Dillehay and his colleagues found wild-type peanuts, squash and cotton as well as a quinoa-like grain, manioc and other tubers and fruits in the floors and hearths of buried preceramic sites, garden plots, irrigation canals, storage structures and on hoes. The researchers used a technique called accelerator mass spectrometry to determine the radiocarbon dates of the materials. Data gleaned from botanists, other archaeological findings and a review of the current plant community in the area suggest the specific strains of the discovered plant remains did not naturally grow in the immediate area.

"The plants we found in northern Peru did not typically grow in the wild in that area," Dillehay said. "We believe they must have therefore been domesticated elsewhere first and then brought to this valley by traders or mobile horticulturists.

"The use of these domesticated plants goes along with broader cultural changes we believe existed at that time in this area, such as people staying in one place, developing irrigation and other water management techniques, creating public ceremonials, building mounds and obtaining and saving exotic artifacts."

The researchers dated the squash from approximately 9,200 years ago, the peanut from 7,600 years ago and the cotton from 5,500 years ago.

Dillehay published the findings with fellow researchers Jack Rossen, Ithaca College, Ithaca, N.Y.; Thomas C. Andres, The Curcurbit Network, New York, N.Y.; and David E. Williams, U.S. Department of Agriculture, Washington, D.C.

Dillehay is chair of the Department of Anthropology at Vanderbilt, Professor Extraordinaire at the Universidad Austral de Chile and was elected to the American Academy of Arts and Sciences in 2007.

The research was supported by the Instituto Nacional de Cultura, Lima; the National Science Foundation; the Heinz Foundation; the University of Kentucky and Vanderbilt University.

Note: This story has been adapted from a news release issued by Vanderbilt University.

Pharmacy student learns about medicine in Peru

Monday, July 02, 2007

College group also explores foreign culture, canoes down Amazon and climbs Machu Picchu.
By GINA VASSELLI
The Express-Times

Ryan Toth canoed down the Amazon, stood on top of Machu Picchu and got class credit for doing it.

The 23-year-old Phillipsburg man traveled to Peru this summer as part of his studies as a pharmacy student at Wilkes University in Pennsylvania.

The study abroad program was organized through the Global Awareness Institute, a nonprofit organization dedicated to saving the rainforest, according to its Web site.

Toth and 11 other pharmacy students from across the country returned June 25 from their three-week trip.

Shelli Holt-Macey, director of Wilkes University's Experiential Programs for the pharmacy school, said the students were selected by the institute's founder, Dr. Barbara Brodman.

The students flew June 1 into Lima, Peru.

"That was basically the last city I saw," Toth said. "The rest was more or less all jungle."

Toth said they visited the GAI's Center for Natural Medicine in Iquitos to learn about natural medicine and drug discovery.

While the group was in Iquitos, it was visited by a shaman who talked about the plants used by the different tribes.

Toth said after her speech, the shaman stayed at the center because of a national workers strike in Peru and demonstrations in Iquitos.

"I guess she was scared to go back," Toth said.

He said the strike was unexpected and surreal.

"That was weird. It happened like two days after we got there," Toth said.

The group left the center a few days later and traveled to Cusco, Peru. It arrived there in time to experience the winter solstice at Machu Picchu.

"It's so huge you just wonder how they could build it," Toth said. "They didn't use mortar and the stones fit so perfectly together you can't fit a credit card between them."

But his parents, Brenda and Dale, had other concerns about the Incan city.

"I knew he was going there but I didn't realize how steep it was. So when I saw those pictures it made me a little nervous," Brenda Toth said.

Ryan Toth said the group traveled down the Amazon in canoes for about three days, which was not always easy.

"One time we were rowing as hard as we could with the current and we weren't moving because of the wind coming against us," he said.

Along the river they met three different native tribes: The Bora, Huitoto and Yagua.

Ryan Toth said he became friends with a river guide from the Bora tribe named Wellington.

"He spoke a little English and I speak a little Spanish so we became friendly," he said.

Wellington hand-carved a mask for him and it became one of many tribal souvenirs Toth took home.

Holt-Macey said the program was a great success because "it's directly related to the study of pharmacy and understanding how other cultures work without a system like the U.S.," she said.

Ryan Toth said the trip "was not the kind of thing you can do as a tourist. We got to see places and people that barely anyone ever sees."

Gina Vasselli is a staff writer. She can be reached at 610-258-7171 or by e-mail at gvasselli@express-times.com.

First Amazon-Andean Crop Plant Transfer And Corn Processing In Peru 3600-4000 Years Ago

Source: Smithsonian Tropical Research Institute
Date: March 7, 2006

Published by Science Daily — Mouthwatering Peruvian cuisine like causa (mashed yellow potatoes layered with avocado and seafood) and carapulcra (dried potatoes and pork/chicken in peanut sauce) combine food crops from Amazon basin rainforests and Andean highlands. Smithsonian archaeologists and colleagues presenting in the prestigious journal, Nature1, uncover the first definitive evidence for this culinary, cultural link: 3600-4000 year-old plant microfossils and starch grains.

Heading to the supermarket to pick up some corn flour, a couple of tomatoes or a can of beans usually doesn't conjure up the notion of 10,000 years of agricultural development in the Americas--a transition from hunter-gatherer cultures to agricultural cultures actively developing and trading new food crops. But this transition is still inadequately understood. New excavations and a growing collection of plant microfossil remains rapidly adds pieces to this puzzle.

A multidisciplinary team excavated a stone house at Waynuna, north of Arequipa on the western slope of the Andes and analyzed plant remains from three grinding stones.
Arrowroot from the Amazon. Starchy arrowroot (Maranta sp.) tubers don't grow in the Andean highlands. So the presence of tiny Arrowroot starch grains and phytoliths on the grinding stones and in associated sediments means that people were moving tubers from lowland Amazon rainforest sites east of the Andes west to the Waynuna site.

Maize from Mexico. Maize (Zea mays) cultivation also swept through the Americas in the millennia following its domestication from Teosinte, a wild ancestor from Mexico's tropical Balsas river valley, some 9000 years ago. At the Waynuna site, maize starch grains were the most common plant remains on the grinding stones. Phytoliths derived from the leaves of maize provided evidence that maize was grown at the site. The shape and grinding damage of maize particles suggests that two races of maize--one used as flour and another, popcorn or dent corn variety--were probably grown and processed at the site. The Waynuna house is older than any of the other sites in Peru where maize has been found and sets back the date of maize cultivation and processing in the region by ~1000 years.

Obsidian trade. The Waynuna site perches on the shoulders of Cerro Aycano, the northernmost point of one of the Andes' richest sources of obsidian. Ample archaeological evidence shows that preceramic peoples moved obsidian from the mountains down into the Amazon basin, so it is not surprising that travelers eventually introduced new foods to residents of this upland area.

Multiproxy microfossil analysis of starch grains and phytoliths is proving to be an extremely important tool--applied to stone tool surfaces and associated sediments, to new sites and to sites where warm, wet climates have destroyed larger plant remains. Future work is expected to yield a better understanding of the domestication and trade of peanuts, manioc and achira, staples depicted in the stone iconography of the first great cultures to develop in a region where amazing cooking is still the standard.

###
The research team included members from the Smithsonian's National Museum of Natural History, the University of Maine, Orono, the Smithsonian Tropical Research Institute, along with Ithaca College in the U.S. and the Museo Contisuyo, Moquegua and the Instituto Nacional de Cultura, Alameda, in Peru. This work was funded by a grant from the Heinz Charitable Trust Latin American Archaeology Program, FERCO, the Office of the Provost, Ithaca College, the Smithsonian Tropical Research Institute and the Smithsonian Museum of Natural History.

The Smithsonian Tropical Research Institute (STRI), a unit of the Smithsonian Institution with headquarters in Panama City, Panama, furthers our understanding of tropical nature and its importance to human welfare, trains students to conduct research in the tropics and promotes conservation by increasing public awareness of the beauty and importance of tropical ecosystems. http://www.stri.org/

Ref. Perry, L., Sandweiss, D., Piperno, D., Radmaker, K., Malpass, M., Umire, A. and de la Vera, P. 2006. Early maize agriculture and interzonal interaction in southern Peru. Nature, 2 March, 2006.

Note: This story has been adapted from a news release issued by Smithsonian Tropical Research Institute.

Predators Keep The World Green, Ecologists Find

Source: Duke University
Date: February 28, 2006
Published by Science Daily — Predators are, ironically, the key to keeping the world green, because they keep the numbers of plant-eating herbivores under control, reports a research team lead by John Terborgh, a professor of environmental science at Duke University's Nicholas School of the Environment and Earth Sciences.

Their findings confirm the answer to one of ecology's oldest and thorniest questions: why is the world green? It also seems to put to rest a competing theory that plants protect themselves from herbivores through physical and chemical defenses.

The researchers drew their conclusions from study of a Venezuelan valley flooded 20 years ago by a hydroelectric project.

The research, reported in the March 2006 issue of the British Ecological Society's Journal of Ecology, was supported by the National Science Foundation. The paper was co-authored by Terborgh, Kenneth Feeley and Bradley Balukjian from Harvard University, Miles Silman from Wake Forest University, and Percy Nuñez of Universidad Nacional "San Antonio de Abad" de Cusco in Peru.

Their results support the so-called "green world hypothesis," first proposed in 1960 by United States scientists Nelson Hairston, Frederick Smith and Lawrence Slobodkin. Despite being almost 50 years old, the green world hypothesis has been almost impossible to test until now.

"Since the landmark paper by Hairston et al, ecologists have been debating whether herbivores are limited by plant defenses or by predators," wrote the authors. "The matter is trivially simple in principle, but in practice the challenge of experimentally creating predator-free environments in which herbivores can increase without constraint has proven almost insurmountable."

However, the researchers realized that the hypothesis could be tested on a vast hydroelectric project.

Within Venezuela's Caroni Valley, an area of 4,300 square kilometres was flooded in 1986 to create a lake (Lago Guri) containing hundreds of islands that were formerly fragments of a continuous landscape.

Terborgh and his team monitored the vegetation at 14 sites of differing size. Nine of the sites were on predator-free islands, while the others were on the mainland or on islands with a complete or nearly complete suite of predators.

They found that, by 1997, small sapling densities on small islands were only 37 percent of those of large land masses and by 2002 this had fallen to just 25 percent. Most of the vertebrates present in regional dry forest ecosystem had disappeared from small islands, including fruit eaters and predators of vertebrates, leaving a hyperabundance of generalist herbivores such as iguanas, howler monkeys and leaf-cutter ants.

"Mere numbers do not do justice to the bizarre condition of herbivore-impacted islets," the authors wrote. "The understory is almost free of foliage, so that a person standing in the interior sees light streaming in from the edge around the entire perimeter. There is almost no leaf litter, and the ground is bright red from the subsoil brought to the surface by leaf-cutter ants.

"Dead twigs, branches and vine stems from canopy dieback litter the ground, and in places lie in heaps. But in striking contrast with this scenario of destruction, the medium islands presented a relatively normal appearance."

Besides proving that the green world hypothesis is correct, Terborgh's team's results have important implications for the debate raging in many countries over reintroduction of top predators such as wolves. "The take-home message is clear: the presence of a viable carnivore guild is fundamental to maintaining biodiversity," the authors wrote.

Information collected for the Journal of Ecology report is a five-year update of results published by Terborgh and 10 other scientists in the Nov. 30, 2001, issue of the journal Science.

"The Science article reported on the first plant census we did, involving 15,000 plants, but it only gave us a snapshot in time," Terborgh said in an interview. "We could see that there were huge differences between the little islands that didn't have any predators on them, and larger islands that did have predators. But we couldn't say much about where that was going to go in the future.

"This article reports on the re-census," he added. "Indeed, during that five-year interval the populations of small, sapling-level plants continued to decline quite radically. And there's no question that the vegetation on these islands is just in a state of collapse."

A drought that began in 2001 and reached extreme levels in 2003 has now ended the study, Terborgh reported.

"By 2003, the lake level had dropped 26 meters," he said. "By then, I think only three of the islands were left surrounded by water. That ended the experiment because it allowed the animals to redistribute themselves in their own fashion. The overcrowded populations of the plant-eating animals that had been the object of our studies simply dispersed.

"The fundamental premise of the whole project was our ability to study predator-free space, and that condition was no longer met. In one period in 2003 we found six different predators on islands that previously had no predators."

Note: This story has been adapted from a news release issued by Duke University.