Two new studies from Wake Forest University’s Center for Amazonian Science and Innovation based in Tambopata, Perú reveal profound changes in the lands along the shores of the world’s longest river and the mountains that feed it.
The first study examines the profound and expanding impacts of the quest for gold as forests are felled at an accelerating rate and the land left poisoned by mercury used to extract the precious metal.
From Wake Forest University:
Small-scale gold mining has destroyed more than 170,000 acres of primary rainforest in the Peruvian Amazon in the past five years, according to a new analysis by scientists at Wake Forest University’s Center for Amazonian Scientific Innovation (CINCIA).
That’s an area larger than San Francisco and 30 percent more than previously reported.
“The scale of the deforestation is really shocking,” said Luis Fernandez, executive director of CINCIA and research associate professor in the department of biology.
The scientists at CINCIA, based in the Madre de Dios region of Peru, have developed a new data fusion method to identify areas destroyed by this small- or artisanal-scale mining. Combining existing CLASlite forest monitoring technology and Global Forest Change data sets on forest loss, this new deforestation detection tool is 20-25 percent more accurate than those used previously.
Both CLASlite and the Global Forest map use different kinds of information from light waves to show changes in the landscape. “Combining the two methods gives us really good information about the specific kind of deforestation we’re looking for,” said Miles Silman, associate director of science for CINCIA and director of Wake Forest’s Center for Energy, Environment, and Sustainability (CEES). Silman has researched biodiversity and ecology in the Western Amazon and Andes for more than 25 years.
Artisanal-scale gold mining has been hard to detect because its aftereffects can masquerade as natural wetlands from a satellite view. But the damage is extensive. Small crews of artisanal miners don’t expect to hit the mother lode. Rather, miners set out to collect the flakes of gold in rainforest.
“We’re not talking about huge gold veins here,” Fernandez said. “But there’s enough gold in the landscape to make a great deal of money in a struggling economy. You just have to destroy an immense amount of land to get it.”
To get the gold, they strip the land of trees or suck up river sediment, and then use toxic mercury to tease the precious metal out of the dirt. The results are environmentally catastrophic.
Artisanal-scale gold mining took root in the Peruvian Amazon in the early 2000s, coinciding with construction of a new modern highway connecting Peru and Brazil. The Interoceanic Highway made Peru’s once remote rainforest and protected lands accessible to anyone. Where it used to take two weeks by all-terrain vehicle to travel from Cuzco to Puerto Maldonado, the capital of Madre de Dios, during the rainy season, it now takes only six hours aboard an air-conditioned luxury bus.
Because artisanal-scale gold mining requires no heavy machinery and thus involves minimal outlay, it has provided a revolving-door opportunity for poor workers from the Andean highlands to seek their fortune in Madre de Dios. When they return home, they leave a patchwork of mercury-polluted ponds and sand dunes, the landscape denuded of trees and most other vegetation.
CINCIA has partnered with Peru’s Ministry of the Environment to try to understand how the new tool developed by its scientists can be used to identify deforestation caused by artisanal-scale gold mining and take effective action to curb the damage.
“We want to integrate high-quality scientific research into the processes the government is using for environmental conservation in Madre de Dios,” Fernandez said.
CINCIA scientists also are studying native species that can be used for post-mining reforestation. The 115-acre experiment at CINCIA’s headquarters is the largest in the Americas.
Wake Forest University established CINCIA in 2016 through CEES. With support from the U.S. Agency for International Development, World Wildlife Fund, IIAP, the Amazon Aid Foundation, Ecosphere Capital Partners/Althelia Climate Change Fund, ESRI Global Inc., UNAMAD, and Universidad de Ingeniería y Tecnología, CINCIA has brought together scientists and conservationists to develop solutions for sustainable use of tropical landscapes, combat environmental destruction and improve health in Madre de Dios.
From Wake Forest News comes this animation showing rate rate of deforestion since 1985:
Deforestation Sequence in the Peruvian Amazon
This animation shows the deforestation in the Peruvian Amazon from 1985 to 2017. Video courtesy Wake Forest University’s Center for Amazonian Scientific Innovation.
Rising temperatures drive Andean tropical trees upslope
As the planet heats up, temperatures in the Amazon’s headwater’s are rising as well, with the heat already showing impacts on the region’s tropical forestdriving them to new heights, mountainous heights.
And that’s bad new for the ecology of lower elevations left behind.
From Wake Forest:
Tropical and subtropical forests across South America’s Andes Mountains are responding to warming temperatures by “migrating” to higher elevations, but probably not quickly enough to avoid loss of biodiversity, functional collapse or even extinction, according to a new study published November 14 in the journal Nature. [$8.99 for short-term access].
The study, supervised by University of Miami researcher Kenneth J. Feeley, was co-authored by Wake Forest biologists Miles Silman and William Farfan-Rios, and used much of the field data they have collected in the Andean forests. Feeley began developing the techniques used in this research when he was a postdoctoral associate at Wake Forest. He also studied at Wake Forest as an undergraduate.
The study confirms for the first time that, like many other plant and animal species around the world, tree species from across the Andean and Amazon forests of Colombia, Ecuador, Peru and northern Argentina have been moving to higher, cooler elevations. But unlike the world’s more temperate or boreal forests, which are far more accustomed to dramatic seasonal shifts in temperature, tropical trees are running into environmental roadblocks at higher elevations that are thwarting their upward migration and threatening their survival.