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Article: Weak effects of plant diversity on leaf-litter breakdown in a tropical stream

TitleWeak effects of plant diversity on leaf-litter breakdown in a tropical stream
Authors
Keywordsallochthonous
biodiversity
decomposition
ecosystem functioning
Hong Kong
macroinvertebrates
Issue Date2010
PublisherCSIRO Publishing. The Journal's web site is located at http://www.publish.csiro.au/journals/mfr/
Citation
Marine And Freshwater Research, 2010, v. 61 n. 10, p. 1218-1225 How to Cite?
AbstractThe relationship between biodiversity and ecosystem functioning is incompletely understood, particularly the relative influence of species richness and composition on functioning. We investigated the effects of plant species diversity on litter breakdown rate (a measure of functioning) and the associated detritivorous macroinvertebrates in a tropical stream in Hong Kong by using single-species and three- and four-species mixtures of leaves with contrasting breakdown rates. We hypothesised that the scarcity of shredding detritivores in Hong Kong streams would limit the scope for diversity effects attributable to differences in leaf composition. Nonetheless, breakdown rates were affected by differences in composition (constituent species within a mixture) rather than richness (number of species in a mixture). Ficus fistulosa (Moraceae) was a key species in mixtures, producing non-additive effects through acceleration of breakdown of other constituent species. There were no other positive (or any negative) non-additive effects of mixing. Leaf diversity did not affect macroinvertebrate functional organisation or taxonomic composition. Assemblages on all litter types were dominated by collector-gatherers (mainly chironomids, >70% of total abundance), and shredders were scarce (<5%). Although diversity had no obvious bottom-up influence on detritivores, non-additive effects of mixing may arise from the influence of litter quality on microbially mediated breakdown in this tropical stream. © 2010 CSIRO.
Persistent Identifierhttp://hdl.handle.net/10722/140916
ISSN
2015 Impact Factor: 1.583
2015 SCImago Journal Rankings: 0.821
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong Kong Special Administrative Region (HKSAR), China[HKU] 7509/06M
Funding Information:

The work described in this paper was partially supported by a grant from the Research Grants Council of Hong Kong Special Administrative Region (HKSAR), China (Project No. [HKU] 7509/06M). We thank Lily Ng for technical support, Aggie O. Y. Li for assistance, and the Director of the Agriculture, Fisheries and Conservation Department, HKSAR Government, for issuing collecting permits. Andrew Boulton, Christopher Swan and Cathy Yule provided constructive comments on a draft manuscript.

References

 

DC FieldValueLanguage
dc.contributor.authorDudgeon, Den_HK
dc.contributor.authorGao, BWen_HK
dc.date.accessioned2011-09-23T06:21:24Z-
dc.date.available2011-09-23T06:21:24Z-
dc.date.issued2010en_HK
dc.identifier.citationMarine And Freshwater Research, 2010, v. 61 n. 10, p. 1218-1225en_HK
dc.identifier.issn1323-1650en_HK
dc.identifier.urihttp://hdl.handle.net/10722/140916-
dc.description.abstractThe relationship between biodiversity and ecosystem functioning is incompletely understood, particularly the relative influence of species richness and composition on functioning. We investigated the effects of plant species diversity on litter breakdown rate (a measure of functioning) and the associated detritivorous macroinvertebrates in a tropical stream in Hong Kong by using single-species and three- and four-species mixtures of leaves with contrasting breakdown rates. We hypothesised that the scarcity of shredding detritivores in Hong Kong streams would limit the scope for diversity effects attributable to differences in leaf composition. Nonetheless, breakdown rates were affected by differences in composition (constituent species within a mixture) rather than richness (number of species in a mixture). Ficus fistulosa (Moraceae) was a key species in mixtures, producing non-additive effects through acceleration of breakdown of other constituent species. There were no other positive (or any negative) non-additive effects of mixing. Leaf diversity did not affect macroinvertebrate functional organisation or taxonomic composition. Assemblages on all litter types were dominated by collector-gatherers (mainly chironomids, >70% of total abundance), and shredders were scarce (<5%). Although diversity had no obvious bottom-up influence on detritivores, non-additive effects of mixing may arise from the influence of litter quality on microbially mediated breakdown in this tropical stream. © 2010 CSIRO.en_HK
dc.languageengen_US
dc.publisherCSIRO Publishing. The Journal's web site is located at http://www.publish.csiro.au/journals/mfr/en_HK
dc.relation.ispartofMarine and Freshwater Researchen_HK
dc.subjectallochthonousen_HK
dc.subjectbiodiversityen_HK
dc.subjectdecompositionen_HK
dc.subjectecosystem functioningen_HK
dc.subjectHong Kongen_HK
dc.subjectmacroinvertebratesen_HK
dc.titleWeak effects of plant diversity on leaf-litter breakdown in a tropical streamen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1323-1650&volume=61&issue=10&spage=1218&epage=1225&date=2010&atitle=Weak+effects+of+plant+diversity+on+leaf-litter+breakdown+in+a+tropical+stream-
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1071/MF10109en_HK
dc.identifier.scopuseid_2-s2.0-77958509146en_HK
dc.identifier.hkuros194855en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77958509146&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume61en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1218en_HK
dc.identifier.epage1225en_HK
dc.identifier.isiWOS:000282879200013-
dc.publisher.placeAustraliaen_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK
dc.identifier.scopusauthoridGao, BW=36243379300en_HK

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