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Article: The influence of macroinvertebrate shredders, leaf type and composition on litter breakdown in a Hong Kong stream

TitleThe influence of macroinvertebrate shredders, leaf type and composition on litter breakdown in a Hong Kong stream
Authors
KeywordsAllochthonous
Biodiversity
Decomposition
Ecosystem functioning
Tropical
Issue Date2011
PublisherE. Schweizerbart'sche Verlagsbuchhandlung. The Journal's web site is located at http://www.schweizerbart.de/j/archiv-hydrobiologie
Citation
Fundamental And Applied Limnology, 2011, v. 178 n. 2, p. 147-157 How to Cite?
AbstractThe contribution of shredders to litter breakdown in a tropical stream in Hong Kong was investigated by using coarse- and fine-mesh bags to include or exclude large macroinvertebrates. Three native species, plus a mixture of all of them, were used to examine the effects of leaf type and species composition on breakdown. A well-studied temperate species, Alnus glutinosa, was included to benchmark breakdown rates in Hong Kong with counterpart streams outside the tropics. Shredders constituted 13 % of macroinvertebrates in coarse-mesh bags but were virtually absent from fine-mesh bags. However, abundance of macroinvertebrates (especially chironomids) in fine-mesh bags was almost twice that in coarse-mesh bags. Despite interspecific differences, litter breakdown rates were consistently faster in coarse-mesh bags, indicating a probable effect of shredders, although current velocity also influenced breakdown of one native species. Alnus glutinosa breakdown rates were within the range reported in temperate streams. The litter mixture broke down at a rate approximately equal to the mean of the constituent species and non-additive compositional effects (indicative of biodiversity-ecosystem functioning relationships) were not apparent. Litter breakdown in fine-mesh bags was rapid relative to rates reported from temperate streams, despite the exclusion of shredders. Evidently, non-shredding macroinvertebrates and microbes played a significant role in litter breakdown in Hong Kong. © 2011 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.
Persistent Identifierhttp://hdl.handle.net/10722/140919
ISSN
2015 Impact Factor: 0.786
2015 SCImago Journal Rankings: 0.519
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong Kong Special Administrative Region, 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, China (Project No. [HKU] 7509/06M). We thank Lily Ng for technical support, and Aggie O. Y. Li for assistance. We are also grateful to Luz Boyero for supplying the penetrometer and helpful comments, and to Manuel A. S. Graca for sending leaves of Abuts glutinosa (although we did not use them). Anne Robertson and two anonymous reviewers made constructive suggestions on the manuscript.

References

 

DC FieldValueLanguage
dc.contributor.authorDudgeon, Den_HK
dc.contributor.authorGao, BWen_HK
dc.date.accessioned2011-09-23T06:21:26Z-
dc.date.available2011-09-23T06:21:26Z-
dc.date.issued2011en_HK
dc.identifier.citationFundamental And Applied Limnology, 2011, v. 178 n. 2, p. 147-157en_HK
dc.identifier.issn1863-9135en_HK
dc.identifier.urihttp://hdl.handle.net/10722/140919-
dc.description.abstractThe contribution of shredders to litter breakdown in a tropical stream in Hong Kong was investigated by using coarse- and fine-mesh bags to include or exclude large macroinvertebrates. Three native species, plus a mixture of all of them, were used to examine the effects of leaf type and species composition on breakdown. A well-studied temperate species, Alnus glutinosa, was included to benchmark breakdown rates in Hong Kong with counterpart streams outside the tropics. Shredders constituted 13 % of macroinvertebrates in coarse-mesh bags but were virtually absent from fine-mesh bags. However, abundance of macroinvertebrates (especially chironomids) in fine-mesh bags was almost twice that in coarse-mesh bags. Despite interspecific differences, litter breakdown rates were consistently faster in coarse-mesh bags, indicating a probable effect of shredders, although current velocity also influenced breakdown of one native species. Alnus glutinosa breakdown rates were within the range reported in temperate streams. The litter mixture broke down at a rate approximately equal to the mean of the constituent species and non-additive compositional effects (indicative of biodiversity-ecosystem functioning relationships) were not apparent. Litter breakdown in fine-mesh bags was rapid relative to rates reported from temperate streams, despite the exclusion of shredders. Evidently, non-shredding macroinvertebrates and microbes played a significant role in litter breakdown in Hong Kong. © 2011 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.en_HK
dc.languageengen_US
dc.publisherE. Schweizerbart'sche Verlagsbuchhandlung. The Journal's web site is located at http://www.schweizerbart.de/j/archiv-hydrobiologieen_HK
dc.relation.ispartofFundamental and Applied Limnologyen_HK
dc.subjectAllochthonousen_HK
dc.subjectBiodiversityen_HK
dc.subjectDecompositionen_HK
dc.subjectEcosystem functioningen_HK
dc.subjectTropicalen_HK
dc.titleThe influence of macroinvertebrate shredders, leaf type and composition on litter breakdown in a Hong Kong streamen_HK
dc.typeArticleen_HK
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1127/1863-9135/2011/0178-0147en_HK
dc.identifier.scopuseid_2-s2.0-79851473082en_HK
dc.identifier.hkuros194861en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79851473082&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume178en_HK
dc.identifier.issue2en_HK
dc.identifier.spage147en_HK
dc.identifier.epage157en_HK
dc.identifier.isiWOS:000286361400005-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK
dc.identifier.scopusauthoridGao, BW=36243379300en_HK

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