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Article: An experimental study of the influence of periphytic algae on invertebrate abundance in a Hong Kong stream
Title | An experimental study of the influence of periphytic algae on invertebrate abundance in a Hong Kong stream |
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Authors | |
Issue Date | 1992 |
Publisher | Blackwell 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? |
Abstract | Algal 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 Identifier | http://hdl.handle.net/10722/178542 |
ISSN | 2021 Impact Factor: 3.538 2020 SCImago Journal Rankings: 1.297 |
DC Field | Value | Language |
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dc.contributor.author | Dudgeon, D | en_US |
dc.contributor.author | Chan, IKK | en_US |
dc.date.accessioned | 2012-12-19T09:48:17Z | - |
dc.date.available | 2012-12-19T09:48:17Z | - |
dc.date.issued | 1992 | en_US |
dc.identifier.citation | Freshwater Biology, 1992, v. 27 n. 1, p. 53-63 | en_US |
dc.identifier.issn | 0046-5070 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/178542 | - |
dc.description.abstract | Algal 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 | en_US |
dc.language | eng | en_US |
dc.publisher | Blackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FWB | en_US |
dc.relation.ispartof | Freshwater Biology | en_US |
dc.title | An experimental study of the influence of periphytic algae on invertebrate abundance in a Hong Kong stream | en_US |
dc.type | Article | en_US |
dc.identifier.email | Dudgeon, D: ddudgeon@hku.hk | en_US |
dc.identifier.authority | Dudgeon, D=rp00691 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.scopus | eid_2-s2.0-0027100036 | en_US |
dc.identifier.volume | 27 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.spage | 53 | en_US |
dc.identifier.epage | 63 | en_US |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Dudgeon, D=7006559840 | en_US |
dc.identifier.scopusauthorid | Chan, IKK=7102336469 | en_US |
dc.identifier.issnl | 0046-5070 | - |