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Article: An experimental study of the influence of periphytic algae on invertebrate abundance in a Hong Kong stream

TitleAn experimental study of the influence of periphytic algae on invertebrate abundance in a Hong Kong stream
Authors
Issue Date1992
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FWB
Citation
Freshwater Biology, 1992, v. 27 n. 1, p. 53-63 How to Cite?
AbstractAlgal biomass, invertebrate morphospecies richness and total abundance decline with greater shading intensity. The responses of individual invertebrate taxa varied: some (especially Trichoptera) were unaffected by shading, whereas grazers (Baetidae, Psephenidae and Elmidae) declined as shading increased. Significant regressions of the densities of individual taxa upon algal and detrital standing stocks in cages had positive slopes, but algal biomass increased during the study while detrital standing stocks declined. Abundance of invertebrates declined or remained rather stable over time. Density increases resulting from a positive association with algae were apparently offset by declines in abundance correlated with reductions in detritus. Declines in algal biomass were associated with greater shading to which animals may respond directly. The plastic covers on two groups of cages (deeply shaded and unshaded) which had been placed in the stream for 28 days were reversed so that cages which had been shaded became unshaded and vice versa. The cages were recovered on day 33. Only Coleoptera demonstrated a positive association with algae inside cages. -from Authors
Persistent Identifierhttp://hdl.handle.net/10722/178542
ISSN
2015 Impact Factor: 2.933
2015 SCImago Journal Rankings: 1.574

 

DC FieldValueLanguage
dc.contributor.authorDudgeon, Den_US
dc.contributor.authorChan, IKKen_US
dc.date.accessioned2012-12-19T09:48:17Z-
dc.date.available2012-12-19T09:48:17Z-
dc.date.issued1992en_US
dc.identifier.citationFreshwater Biology, 1992, v. 27 n. 1, p. 53-63en_US
dc.identifier.issn0046-5070en_US
dc.identifier.urihttp://hdl.handle.net/10722/178542-
dc.description.abstractAlgal biomass, invertebrate morphospecies richness and total abundance decline with greater shading intensity. The responses of individual invertebrate taxa varied: some (especially Trichoptera) were unaffected by shading, whereas grazers (Baetidae, Psephenidae and Elmidae) declined as shading increased. Significant regressions of the densities of individual taxa upon algal and detrital standing stocks in cages had positive slopes, but algal biomass increased during the study while detrital standing stocks declined. Abundance of invertebrates declined or remained rather stable over time. Density increases resulting from a positive association with algae were apparently offset by declines in abundance correlated with reductions in detritus. Declines in algal biomass were associated with greater shading to which animals may respond directly. The plastic covers on two groups of cages (deeply shaded and unshaded) which had been placed in the stream for 28 days were reversed so that cages which had been shaded became unshaded and vice versa. The cages were recovered on day 33. Only Coleoptera demonstrated a positive association with algae inside cages. -from Authorsen_US
dc.languageengen_US
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FWBen_US
dc.relation.ispartofFreshwater Biologyen_US
dc.titleAn experimental study of the influence of periphytic algae on invertebrate abundance in a Hong Kong streamen_US
dc.typeArticleen_US
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_US
dc.identifier.authorityDudgeon, D=rp00691en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0027100036en_US
dc.identifier.volume27en_US
dc.identifier.issue1en_US
dc.identifier.spage53en_US
dc.identifier.epage63en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridDudgeon, D=7006559840en_US
dc.identifier.scopusauthoridChan, IKK=7102336469en_US

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