File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Shredders: Species richness, abundance, and role in litter breakdown in tropical Hong Kong streams

TitleShredders: Species richness, abundance, and role in litter breakdown in tropical Hong Kong streams
Authors
KeywordsDecomposition
Functional feeding groups
Leaf utter
Macroinvertebrates
Microbes
Phosphate
Issue Date2009
PublisherNorth American Benthological Society. The Journal's web site is located at http://www.benthos.org
Citation
Journal Of The North American Benthological Society, 2009, v. 28 n. 1, p. 167-180 How to Cite?
AbstractShredders appear to be scarce in many tropical streams, but few data are available about their abundance or role in litter breakdown in these systems. Shredder species richness, abundance, and biomass were investigated in 10 small streams (5 shaded, 5 unshaded) in Hong Kong as a step toward understanding the role of shredders in tropical Asian streams. In addition, breakdown of Liquidambar formosana (Hamamelidaceae) leaves was investigated to determine if breakdown rates changed in response to shredder species richness, abundance, or biomass in these 10 streams. Shredders were scarce in terms of species richness (a total of 6 obligate shredders and 2 facultative shredders) and abundance (mean = 2.0%, range = 0-7.7% of total macroinvertebrate abundance). Obligate shredder biomass was not high across the 10 streams (mean = 13% of total biomass), and it was variable in shaded streams (0.6-38.7%); all high values were attributable to the presence of a few large individuals (<0.2% of total abundance). Relative abundance and biomass of obligate shredders were higher in shaded than in unshaded streams (abundance: 1.9% vs 0.1%; biomass: 22.3% vs 4.3%). Shading did not affect the densities or relative abundances of functional feeding groups (FFGs) other than shredders. Litter breakdown rates did not vary in response to species richness, abundance, or biomass of shredders among the 10 streams. However, when the 2 moderately nutrient-enriched streams were excluded, breakdown rates were positively related to obligate shredder densities, indicating a possible contribution of shredders to litter breakdown. The potential importance of microbes was indicated by a relationship between breakdown rates and stream PO4 concentrations. © 2009 by The North American Benthological Society.
Persistent Identifierhttp://hdl.handle.net/10722/60672
ISSN
2013 Impact Factor: 2.706
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong Kong Special Administrative Region, China[HKU] 7509/06M
University of Hong Kong
Funding Information:

The authors are grateful to Chen Young (Carnegie Museum) for his advice on Tipula larvae, and Luz Boyero (James Cook University) for her advice on procedures and data in Cheshire et al. (2005), as well as Pamela Silver, Bruce Chessman, and 2 anonymous referees for their constructive comments on the manuscript. Special thanks are due to Lily Ng and James Hui for their technical support and Teresa Ma for her assistance in sample sorting. 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), and by a postgraduate studentship awarded to AOYL during her M.Phil. studies at the University of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorLi, AOYen_HK
dc.contributor.authorDudgeon, Den_HK
dc.date.accessioned2010-05-31T04:16:15Z-
dc.date.available2010-05-31T04:16:15Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of The North American Benthological Society, 2009, v. 28 n. 1, p. 167-180en_HK
dc.identifier.issn0887-3593en_HK
dc.identifier.urihttp://hdl.handle.net/10722/60672-
dc.description.abstractShredders appear to be scarce in many tropical streams, but few data are available about their abundance or role in litter breakdown in these systems. Shredder species richness, abundance, and biomass were investigated in 10 small streams (5 shaded, 5 unshaded) in Hong Kong as a step toward understanding the role of shredders in tropical Asian streams. In addition, breakdown of Liquidambar formosana (Hamamelidaceae) leaves was investigated to determine if breakdown rates changed in response to shredder species richness, abundance, or biomass in these 10 streams. Shredders were scarce in terms of species richness (a total of 6 obligate shredders and 2 facultative shredders) and abundance (mean = 2.0%, range = 0-7.7% of total macroinvertebrate abundance). Obligate shredder biomass was not high across the 10 streams (mean = 13% of total biomass), and it was variable in shaded streams (0.6-38.7%); all high values were attributable to the presence of a few large individuals (<0.2% of total abundance). Relative abundance and biomass of obligate shredders were higher in shaded than in unshaded streams (abundance: 1.9% vs 0.1%; biomass: 22.3% vs 4.3%). Shading did not affect the densities or relative abundances of functional feeding groups (FFGs) other than shredders. Litter breakdown rates did not vary in response to species richness, abundance, or biomass of shredders among the 10 streams. However, when the 2 moderately nutrient-enriched streams were excluded, breakdown rates were positively related to obligate shredder densities, indicating a possible contribution of shredders to litter breakdown. The potential importance of microbes was indicated by a relationship between breakdown rates and stream PO4 concentrations. © 2009 by The North American Benthological Society.en_HK
dc.languageengen_HK
dc.publisherNorth American Benthological Society. The Journal's web site is located at http://www.benthos.orgen_HK
dc.relation.ispartofJournal of the North American Benthological Societyen_HK
dc.subjectDecompositionen_HK
dc.subjectFunctional feeding groupsen_HK
dc.subjectLeaf utteren_HK
dc.subjectMacroinvertebratesen_HK
dc.subjectMicrobesen_HK
dc.subjectPhosphateen_HK
dc.titleShredders: Species richness, abundance, and role in litter breakdown in tropical Hong Kong streamsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0887-3593&volume=28&issue=1&spage=167&epage=180&date=2009&atitle=Shredders:+species+richness,+abundance,+and+role+in+litter+breakdown+in+tropical+Hong+Kong+streams-
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1899/08-043.1en_HK
dc.identifier.scopuseid_2-s2.0-61449217895en_HK
dc.identifier.hkuros163367en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-61449217895&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume28en_HK
dc.identifier.issue1en_HK
dc.identifier.spage167en_HK
dc.identifier.epage180en_HK
dc.identifier.isiWOS:000263481300015-
dc.publisher.placeCanadaen_HK
dc.identifier.scopusauthoridLi, AOY=24773824300en_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats