The climate sensitive zone along an altitudinal gradient in central Himalayan rivers: a useful concept to monitor climate change impacts in mountain regions

摘要: Highland freshwater ecosystems respond rapidly to changing climatic conditions making the biota of mountain streams and rivers particularly vulnerable climate change. Lack data concepts monitor manage potential effects change on is evident in developing countries. Many highest longest systems are found these regions provide fundamental water-based services The sensitive zone (CSZ) concept based upon changes community composition along altitudinal gradients that serve as a proxy for gradients. CSZ characterizes climatically likely react quickly We present framework how can be adapted implemented streams, demonstrate its applicability central Himalayan Nepal. sampled analyzed benthic invertebrate communities 58 from 1500 4500 m asl. A generalized linear model identified altitude only significant, albeit indirect, variable explaining composition. applied species turnover scores threshold indicator taxon analysis (TITAN) identify extensive An band between 2900 3500 m was characterized by 33 taxa. Identifying CSZs help prioritize resources monitoring impacts running waters pinpoint stream reaches suitable testing efficacy change-directed mitigation practices.