Assemblage stability in stream fishes: A review

摘要: We quantified the stability of nine stream fish assemblages by calculating coefficients variation population size for assemblage members. Coefficients were high and averaged over 96%; indicating that most quite variable. Coefficient (CV) estimates not significantly affected by: (1) years study, (2) mean abundance, (3) familial classification, or (4) interval between collections. also detected minor regional differences in CVs. The variability exhibited many suggests it may be difficult to detect effects anthropogenic disturbances using data alone. Consequently, we urge managers exercise caution evaluation these disturbances. More long-term studies ecological characteristics undisturbed are needed provide a benchmark against which disturbed systems can compared.