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Article: Effects of Macrobrachium hainanense predation on benthic community functioning in tropical Asian streams

TitleEffects of Macrobrachium hainanense predation on benthic community functioning in tropical Asian streams
Authors
KeywordsDensity Manipulation
Forest Stream
Hong Kong
Litter Processing
Periphyton
Issue Date2004
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FWB
Citation
Freshwater Biology, 2004, v. 49 n. 10, p. 1306-1319 How to Cite?
Abstract1. Macrobrachium hainanense is a large predatory palaemonid shrimp, present at high densities in pools of low-order forested streams in Hong Kong. The present study investigated the impacts of M. hainanense on benthic community structure and functions in pools of two streams: Tai Po Kau Forest Stream and Tai Shing Stream. 2. Repeated whole-pool experiments involving shrimp density manipulations (removal, control and addition) were conducted in both streams between October 2000 and April 2002, and included a wet (May to September) and two dry (October to April) seasons. The three objectives of the study were to determine the effects of M. hainanense predation on benthic macroinvertebrate abundance and species richness, rates of leaf litter breakdown because of effects on detritivores, and periphyton standing stocks by way of an effect on herbivores. 3. Wet season results showed consistent reductions in benthos densities and species richness following heavy rainfall, irrespective of shrimp manipulation. These results suggested that spate-induced disturbances might override biotic effects and play a dominant role in structuring benthic communities in stream pools in Hong Kong. 4. No significant, reproducible effects on any of the response variables measured in either stream were found during the dry season. Litter breakdown was reduced in the absence of shrimps during one experiment only, suggesting it might be a type I error. These results signified no effect of shrimp removal on benthic communities, or on the functional processes of litter breakdown, or on periphyton accumulation. The large scale of the experimental units (8-40 m2), refuge availability, and the presence of benthic predatory fishes that cropped excess prey made available by removal of M. hainanense, may have contributed to the lack of any effect, despite the abundance of the predatory shrimps.
Persistent Identifierhttp://hdl.handle.net/10722/179061
ISSN
2015 Impact Factor: 2.933
2015 SCImago Journal Rankings: 1.574
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorMantel, SKen_US
dc.contributor.authorDudgeon, Den_US
dc.date.accessioned2012-12-19T09:51:42Z-
dc.date.available2012-12-19T09:51:42Z-
dc.date.issued2004en_US
dc.identifier.citationFreshwater Biology, 2004, v. 49 n. 10, p. 1306-1319en_US
dc.identifier.issn0046-5070en_US
dc.identifier.urihttp://hdl.handle.net/10722/179061-
dc.description.abstract1. Macrobrachium hainanense is a large predatory palaemonid shrimp, present at high densities in pools of low-order forested streams in Hong Kong. The present study investigated the impacts of M. hainanense on benthic community structure and functions in pools of two streams: Tai Po Kau Forest Stream and Tai Shing Stream. 2. Repeated whole-pool experiments involving shrimp density manipulations (removal, control and addition) were conducted in both streams between October 2000 and April 2002, and included a wet (May to September) and two dry (October to April) seasons. The three objectives of the study were to determine the effects of M. hainanense predation on benthic macroinvertebrate abundance and species richness, rates of leaf litter breakdown because of effects on detritivores, and periphyton standing stocks by way of an effect on herbivores. 3. Wet season results showed consistent reductions in benthos densities and species richness following heavy rainfall, irrespective of shrimp manipulation. These results suggested that spate-induced disturbances might override biotic effects and play a dominant role in structuring benthic communities in stream pools in Hong Kong. 4. No significant, reproducible effects on any of the response variables measured in either stream were found during the dry season. Litter breakdown was reduced in the absence of shrimps during one experiment only, suggesting it might be a type I error. These results signified no effect of shrimp removal on benthic communities, or on the functional processes of litter breakdown, or on periphyton accumulation. The large scale of the experimental units (8-40 m2), refuge availability, and the presence of benthic predatory fishes that cropped excess prey made available by removal of M. hainanense, may have contributed to the lack of any effect, despite the abundance of the predatory shrimps.en_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.rightsFreshwater Biology. Copyright © Blackwell Publishing Ltd.-
dc.subjectDensity Manipulationen_US
dc.subjectForest Streamen_US
dc.subjectHong Kongen_US
dc.subjectLitter Processingen_US
dc.subjectPeriphytonen_US
dc.titleEffects of Macrobrachium hainanense predation on benthic community functioning in tropical Asian streamsen_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.doi10.1111/j.1365-2427.2004.01268.xen_US
dc.identifier.scopuseid_2-s2.0-4644328305en_US
dc.identifier.hkuros91691-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-4644328305&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume49en_US
dc.identifier.issue10en_US
dc.identifier.spage1306en_US
dc.identifier.epage1319en_US
dc.identifier.isiWOS:000223906000006-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridMantel, SK=6603720784en_US
dc.identifier.scopusauthoridDudgeon, D=7006559840en_US

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