Summary/Abstract
Climate warming tends to create conditions which are more hospitable to small-bodied organisms than larger organisms. To quantify the effects of climate change on stream fish communities in France, researchers monitored fish size spectra in 583 stream fish communities over 20 years. The results showed that, in the absence of other human-caused pressures, warming temperature trends caused an increase in populations of small-bodied fish and a decrease in populations of large-bodied fish. Where other human pressures were present, however, this trend in size was not observed.