论文信息 - Testing the Himalayan degradation hypothesis: does catchment land use affect river biota?

Testing the Himalayan degradation hypothesis: does catchment land use affect river biota?

For two decades, there has been fierce debate about the effects of human activity on the Himalayan mountains. In an early seminal paper, EcKHOLM (1975) suggested that population pressures across the Hindu-Kush Himalaya would lead to widespread replacement of semi-natural lands by agriculture. Change in hillslope stability, soi! erosion, runoff quantity and fluvial character would then exacerbate natural effects on runoff and fluvial geomorphology from an intense monsoonal climate. Although more recent perspectives emphasise chemical effects by local agricultural intensification (e.g. CoLLINS & ]ENKINS 1996), or regional air pollution from rapid economic growth (BHATII et al. 1992), catchment-scale effects on rivers remain central to the debate about Himalayan change.

S. Manel | S. Ormerod | S. Buckton | I. Jüttner | P. Brewin

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