Posted 29 April 2013 - 08:06 AM
By Dr. Julie Kunen
When most people think of conservation in the Amazon, images of rainforests – burned and bulldozed for cattle pastures and plantations –come to mind. And, indeed, in the past two decades some 325,000 square kilometers of rainforest in the region have been lost.
Fewer of us remember that the largest river system in the world originates in the towering Andes and the more modest elevations of the Brazilian and Guiana Shields. Water flowing through the Amazon Basin nourishes millions of people and innumerable and incredible diverse species of wildlife. Covering nearly 40 percent of South America, these waters exceed in volume the world’s next six largest rivers combined.
Julie Larsen Maher/WCS
Threats to the Amazon come not only from deforestation, but also from dams, roads, human-induced climate change, gold mining, petroleum extraction, shipping and the unplanned growth of cities, whose expanding populations consume more and more of the Amazon River’s resources.
There is a crucial link between the river and those who live in the Amazon. From rural fishermen and indigenous people to villagers and urban inhabitants in cities like Iquitos, Peru and Manaus, Brazil, as many as 20 million people depend on the Amazon for clean drinking water, transportation along its network of rivers, subsistence and commercial fisheries, and water for agriculture.
Fishing the Marañón River – Pablo Puertas/WCS
Although extractives like oil and rubber have long attracted industry to the Amazon Basin, fish is the most important resource there. In the Basin you will find some of the largest freshwater species in the world, including the giant pirarucu, which can grow to nine feet and weigh 300 pounds, and many species that evolved with flooded rainforests to feed on fruits and other tree-borne foods.
Fish are the critical link between the environmental health of rivers and wetlands and the livelihoods of millions of people. Because they are highly sensitive to changes in water levels, chemistry, and sediment levels, fish are the best indicators of the overall health of the Amazon River system and link its habitats ecologically. As go fish and fish habitat (including flooded forests and floating meadows), so go pink river dolphins, black caiman, manatee, turtles, and other aquatic animals.
Fish Market in Iquitos – Pablo Puertas
A combination of infrastructure development and climate change could disrupt the natural signals, water quality, and habitats upon which migratory fish depend. All of these activities can now be seen in the western Amazon. During a recent visit to Iquitos, Peru, I observed signs of watershed deforestation, urban pollution, and extreme river-level events. Massive hydrocarbon exploration is reflected in the almost military-like fleet of helicopters at the local airport servicing dozens of new petroleum sites.
Not far from Iquitos, I encountered the first of two contrasting views of the relationship of Amazonians to their water resources. On a placid stretch of the Ucayali River, I watched as groups of pink river dolphins played as they moved along the river in search of any of dozens of fish species they feed on, while fisherman from a nearby village built on stilts to remain above seasonal floods stood in dugout canoes, silently casting their nets to catch the evening meal for their families.
Pink River Dolphin on the Marañón River – Pablo Puertas/WCS
I caught my second view way downstream in Manaus, a rapidly modernizing city of nearly two million built at the confluence of the Rio Negro and the Amazon River in Brazil. There, wealthier residents go to work in high rise offices. They drive SUVs, shop in one of several sprawling new shopping malls, and buy expensive, high quality fish to take home to their families in nearby suburbs and exurbs.
These two scenes share a common element – the water and forest resources on which so much else depends. Through its Amazon Waters initiative, the Wildlife Conservation Society is working with an array of stakeholders to develop a shared vision for the Amazon that recognizes the value of fisheries, wildlife, and their aquatic habitats, as well as the need to manage these resources sustainably in a way that contributes to the quality of life of people throughout the basin.