Environmental factors as forces structuring the fish community of the Elbe Estuary
Identifieur interne : 001527 ( Istex/Corpus ); précédent : 001526; suivant : 001528Environmental factors as forces structuring the fish community of the Elbe Estuary
Auteurs : R. Thiel ; A. Sepúlveda ; R. Kafemann ; W. NellenSource :
- Journal of Fish Biology [ 0022-1112 ] ; 1995-01.
English descriptors
- KwdEn :
Abstract
Smelt, flounder, eel, three‐spined stickleback, twaite shad, ruffe and herring were the major species among 62 forming the fish community of the Elbe estuary. Species richness, species diversity, evenness and total fish biomass decreased in the upstream direction. Total abundance was greatest during summer. Salinity was the most significant physico‐chemical factor affecting species richness and total fish biomass, whereas water temperature was the best predictor of total abundance. Marine fish species decreased with decreasing salinity, while the freshwater species roach and ide were absent at salinities > 15‰. Bream, blue bream, white bream, perch and pikeperch occurred more frequently in shallow marginal regions with lower current velocities, while herring and other marine species occurred closer to the deep central regions with high current velocities. Annual and seasonal variations of the community structure mainly reflected in population dynamics of smelt, flounder, twaite shad, three‐spined stickleback and eel, especially those of 0‐age smelt. Populations of smelt and ruffe and their importance in the fish community increased between 1989 and 1992, while those of twaite shad and eel decreased. At oxygen concentrations <3 mg I1, smelt and flounder were rare, but eels were at their maximum at 3.5 mg I−1. Changes of species composition and fish abundance were closely related to daytime and tidal cycle.
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DOI: 10.1111/j.1095-8649.1995.tb05946.x
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ISTEX:18E785E8E7DBE46A6A5F395799848B065ADA67ACLe document en format XML
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Thiel</name><affiliation><mods:affiliation>Universität Hamburg, Institut für Hydrobiologie und Fischereiwissenschaft, Olbersweg 24, 22767 Hamburg, Germany</mods:affiliation></affiliation></author><author><name sortKey="Sepulveda, A" sort="Sepulveda, A" uniqKey="Sepulveda A" first="A." last="Sepúlveda">A. Sepúlveda</name><affiliation><mods:affiliation>Universität Hamburg, Institut für Hydrobiologie und Fischereiwissenschaft, Olbersweg 24, 22767 Hamburg, Germany</mods:affiliation></affiliation></author><author><name sortKey="Kafemann, R" sort="Kafemann, R" uniqKey="Kafemann R" first="R." last="Kafemann">R. Kafemann</name><affiliation><mods:affiliation>Universität Hamburg, Institut für Hydrobiologie und Fischereiwissenschaft, Olbersweg 24, 22767 Hamburg, Germany</mods:affiliation></affiliation></author><author><name sortKey="Nellen, W" sort="Nellen, W" uniqKey="Nellen W" first="W." last="Nellen">W. 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Species richness, species diversity, evenness and total fish biomass decreased in the upstream direction. Total abundance was greatest during summer. Salinity was the most significant physico‐chemical factor affecting species richness and total fish biomass, whereas water temperature was the best predictor of total abundance. Marine fish species decreased with decreasing salinity, while the freshwater species roach and ide were absent at salinities > 15‰. Bream, blue bream, white bream, perch and pikeperch occurred more frequently in shallow marginal regions with lower current velocities, while herring and other marine species occurred closer to the deep central regions with high current velocities. Annual and seasonal variations of the community structure mainly reflected in population dynamics of smelt, flounder, twaite shad, three‐spined stickleback and eel, especially those of 0‐age smelt. Populations of smelt and ruffe and their importance in the fish community increased between 1989 and 1992, while those of twaite shad and eel decreased. At oxygen concentrations <3 mg I1, smelt and flounder were rare, but eels were at their maximum at 3.5 mg I−1. Changes of species composition and fish abundance were closely related to daytime and tidal cycle.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>R. Thiel</name><affiliations><json:string>Universität Hamburg, Institut für Hydrobiologie und Fischereiwissenschaft, Olbersweg 24, 22767 Hamburg, Germany</json:string></affiliations></json:item><json:item><name>A. Sepúlveda</name><affiliations><json:string>Universität Hamburg, Institut für Hydrobiologie und Fischereiwissenschaft, Olbersweg 24, 22767 Hamburg, Germany</json:string></affiliations></json:item><json:item><name>R. 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Populations of smelt and ruffe and their importance in the fish community increased between 1989 and 1992, while those of twaite shad and eel decreased. At oxygen concentrations >3 mg I1, smelt and flounder were rare, but eels were at their maximum at 3.5 mg I−1. 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Populations of smelt and ruffe and their importance in the fish community increased between 1989 and 1992, while those of twaite shad and eel decreased. At oxygen concentrations <3 mg I1, smelt and flounder were rare, but eels were at their maximum at 3.5 mg I−1. 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Species richness, species diversity, evenness and total fish biomass decreased in the upstream direction. Total abundance was greatest during summer. Salinity was the most significant physico‐chemical factor affecting species richness and total fish biomass, whereas water temperature was the best predictor of total abundance. Marine fish species decreased with decreasing salinity, while the freshwater species roach and ide were absent at salinities > 15‰. Bream, blue bream, white bream, perch and pikeperch occurred more frequently in shallow marginal regions with lower current velocities, while herring and other marine species occurred closer to the deep central regions with high current velocities. Annual and seasonal variations of the community structure mainly reflected in population dynamics of smelt, flounder, twaite shad, three‐spined stickleback and eel, especially those of 0‐age smelt. Populations of smelt and ruffe and their importance in the fish community increased between 1989 and 1992, while those of twaite shad and eel decreased. At oxygen concentrations <3 mg I1, smelt and flounder were rare, but eels were at their maximum at 3.5 mg I−1. Changes of species composition and fish abundance were closely related to daytime and tidal cycle.</abstract><subject lang="en"><genre>keywords</genre><topic>estuary</topic><topic>Elbe</topic><topic>fish community</topic><topic>environmental factors</topic><topic>diversity</topic><topic>fish biomass</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Fish Biology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0022-1112</identifier><identifier type="eISSN">1095-8649</identifier><identifier type="DOI">10.1111/(ISSN)1095-8649</identifier><identifier type="PublisherID">JFB</identifier><part><date>1995</date><detail type="volume"><caption>vol.</caption><number>46</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>47</start><end>69</end><total>23</total></extent></part></relatedItem><identifier type="istex">18E785E8E7DBE46A6A5F395799848B065ADA67AC</identifier><identifier type="DOI">10.1111/j.1095-8649.1995.tb05946.x</identifier><identifier type="ArticleID">JFB47</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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