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Temporal Characteristics of Fish Assemblage Structure in an Ohio Stream
Gary K. Meffe and Tim M. Berra
Vol. 1988, No. 3 (Aug. 3, 1988), pp. 684-691
Stable URL: http://www.jstor.org/stable/1445388
Page Count: 8
You can always find the topics here!Topics: Fish, Streams, Species, Taxa, Predators, Creeks, Predictability, Freshwater fishes, Predation, Freshwater ecology
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We examined persistence (constancy of species composition) and stability (constancy of relative species abundances) of a fish assemblage at one site on a fourth-order stream in north-central Ohio. Thirty-eight quantitative samples taken over a 9 yr period indicate that the assemblage was both persistent and stable over that period. Analysis of trophic composition of the assemblage supports the same conclusion. Five groups of species were clearly identified based on clustering of persistence and numerical abundance patterns: permanent/high density, permanent/moderate density, frequent/moderate density, infrequent/low density, and transients. Although the assemblage has some degree of predictability, the mechanisms responsible must be evaluated through other than documentation of long-term pattern.