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Article: Spatio-temporal changes of marine macrobenthic community in sub-tropical waters upon recovery from eutrophication. I. Sediment quality and community structure

TitleSpatio-temporal changes of marine macrobenthic community in sub-tropical waters upon recovery from eutrophication. I. Sediment quality and community structure
Authors
KeywordsCommunity structure
Eutrophication
Macrobenthos
Recovery
Sediment quality
Issue Date2008
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/marpolbul
Citation
Marine Pollution Bulletin, 2008, v. 56 n. 2, p. 282-296 How to Cite?
AbstractA two-year study was conducted in the vicinity of a harbour in sub-tropical Hong Kong, to examine the progress of improvement in sediment quality and recovery of macrobenthic community upon cessation of organic pollution caused by sewage discharge. Median sediment particle diameter (Mdφ{symbol}) and levels of total organic carbon (TOC), total Kjeldahl nitrogen (TKN), ammonia-nitrogen (NH 3-N) and total phosphorus (TP), as well as macrobenthic species composition and abundance were determined bi-monthly at three inside-harbour and two outside-harbour locations. At the two inside-harbour locations, significantly higher levels of TOC, TKN, NH 3-N and TP in sediments were observed than the outside-harbour locations. However, no significant temporal change of nutrient levels was detected at all sampling locations during the two-year study, except a significant decrease in TKN and NH 3-N levels at one outside-harbour location and a decline in NH 3-N content at another outside-harbour location. Spatially, the highest in mean total species number, individual number, species diversity H′ and lowest evenness J was found at one outside-harbour location, whereas the other four locations had relatively similar values. H′ was negatively correlated with TOC, TKN, NH 3-N and TP content in sediments while J was positively correlated with MDφ{symbol}. Across the study period, the patterns of macrobenthic community were significantly different among all samplings and that the spatial difference of benthic community was best correlated with MDφ{symbol}, TOC, TKN and water depth. A weak sign of recovery in macrobenthic community structure was detected at inside-harbour locations, with replacement of opportunistic by ubiquitous species over the two-year study. The slow recovery of macrobenthic community was related to sediment characteristics. Results of a larval settlement bioassay using the polychaete Capitella sp. I also demonstrated that the inside-harbour sediments were still unfavourable for colonization and larval settlement of species sensitive to pollution. The slow biodegradation of the organic pollutants and continuous presence of heavy metals in the sediment may hinder settlement and colonization of benthic animals. However, increases of H′ and J were observed in a longer time scale when comparing the present data with those obtained four years ago. This suggested that a detectable recovery of benthic community in the harbour may take at least three years and a complete recovery may even take longer duration. © 2007 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/92763
ISSN
2014 Impact Factor: 2.991
2013 SCImago Journal Rankings: 1.197
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorShin, PKSen_HK
dc.contributor.authorLam, NWYen_HK
dc.contributor.authorWu, RSSen_HK
dc.contributor.authorQian, PYen_HK
dc.contributor.authorCheung, SGen_HK
dc.date.accessioned2010-09-17T10:56:27Z-
dc.date.available2010-09-17T10:56:27Z-
dc.date.issued2008en_HK
dc.identifier.citationMarine Pollution Bulletin, 2008, v. 56 n. 2, p. 282-296en_HK
dc.identifier.issn0025-326Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/92763-
dc.description.abstractA two-year study was conducted in the vicinity of a harbour in sub-tropical Hong Kong, to examine the progress of improvement in sediment quality and recovery of macrobenthic community upon cessation of organic pollution caused by sewage discharge. Median sediment particle diameter (Mdφ{symbol}) and levels of total organic carbon (TOC), total Kjeldahl nitrogen (TKN), ammonia-nitrogen (NH 3-N) and total phosphorus (TP), as well as macrobenthic species composition and abundance were determined bi-monthly at three inside-harbour and two outside-harbour locations. At the two inside-harbour locations, significantly higher levels of TOC, TKN, NH 3-N and TP in sediments were observed than the outside-harbour locations. However, no significant temporal change of nutrient levels was detected at all sampling locations during the two-year study, except a significant decrease in TKN and NH 3-N levels at one outside-harbour location and a decline in NH 3-N content at another outside-harbour location. Spatially, the highest in mean total species number, individual number, species diversity H′ and lowest evenness J was found at one outside-harbour location, whereas the other four locations had relatively similar values. H′ was negatively correlated with TOC, TKN, NH 3-N and TP content in sediments while J was positively correlated with MDφ{symbol}. Across the study period, the patterns of macrobenthic community were significantly different among all samplings and that the spatial difference of benthic community was best correlated with MDφ{symbol}, TOC, TKN and water depth. A weak sign of recovery in macrobenthic community structure was detected at inside-harbour locations, with replacement of opportunistic by ubiquitous species over the two-year study. The slow recovery of macrobenthic community was related to sediment characteristics. Results of a larval settlement bioassay using the polychaete Capitella sp. I also demonstrated that the inside-harbour sediments were still unfavourable for colonization and larval settlement of species sensitive to pollution. The slow biodegradation of the organic pollutants and continuous presence of heavy metals in the sediment may hinder settlement and colonization of benthic animals. However, increases of H′ and J were observed in a longer time scale when comparing the present data with those obtained four years ago. This suggested that a detectable recovery of benthic community in the harbour may take at least three years and a complete recovery may even take longer duration. © 2007 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/marpolbulen_HK
dc.relation.ispartofMarine Pollution Bulletinen_HK
dc.subjectCommunity structureen_HK
dc.subjectEutrophicationen_HK
dc.subjectMacrobenthosen_HK
dc.subjectRecoveryen_HK
dc.subjectSediment qualityen_HK
dc.titleSpatio-temporal changes of marine macrobenthic community in sub-tropical waters upon recovery from eutrophication. I. Sediment quality and community structureen_HK
dc.typeArticleen_HK
dc.identifier.emailWu, RSS: rudolfwu@hku.hken_HK
dc.identifier.authorityWu, RSS=rp01398en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.marpolbul.2007.10.023en_HK
dc.identifier.pmid18061627en_HK
dc.identifier.scopuseid_2-s2.0-38949102982en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-38949102982&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume56en_HK
dc.identifier.issue2en_HK
dc.identifier.spage282en_HK
dc.identifier.epage296en_HK
dc.identifier.isiWOS:000254101900022-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridShin, PKS=7004445653en_HK
dc.identifier.scopusauthoridLam, NWY=23489314300en_HK
dc.identifier.scopusauthoridWu, RSS=7402945079en_HK
dc.identifier.scopusauthoridQian, PY=35240648600en_HK
dc.identifier.scopusauthoridCheung, SG=7202473456en_HK

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