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Considerations on Benthos Abundance in Freshwaters, its Factors and Mechanisms
Author(s) -
Kajak Zdzislaw
Publication year - 1988
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19880730103
Subject(s) - benthos , trophic level , abundance (ecology) , biomass (ecology) , ecology , invertebrate , predation , competition (biology) , ecosystem , environmental science , biology , fishery , benthic zone
Variations in biomass and maximal biomasses observed are reviewed. Trophic conditions are considered to be the main factor affecting both nonpredatory and predatory benthos abundance. Competition and predation by invertebrates seem to adjust the abundance of nonpredatory benthos to trophic conditions; both of these processes are influenced by fish. Examples of the role of benthos in ecosystems are reviewed.