| http://www.w3.org/ns/prov#value | - Species richness was expected to peak at intermediate levels of temporal variation.Stochastic disturbances from droughts, floods, confluences and tributaries, in addition to gradual downstream physical changes, competition and other biotic factors, are now thought to be the major driving forces behind community structure in streams (Resh et al., 1988; Poff, 1992; Lake, 2000; Rice et al., 2001, 200
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