Reading Radar:
Assessing Our Impact on the World's Rivers
Tuesday, October 19, 2010
The human impact on the world’s river systems will be hard to reverse, says Margaret Palmer, author of a second Nature article on freshwater biodiversity loss, “Beyond Infrastructure.” Human-induced changes to watersheds affect local hydrology at a fundamental level, she contends, weakening rivers’ ability to deliver crucial “ecological goods and services” — such as clean water and nutrient-rich sediment loads — that help maintain the health of local environments and the human populations that depend on them. To fully understand the scope of the problem, Palmer says more research is needed to explore the linkages between biodiversity levels and “ecosystem services” that healthy rivers provide.
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