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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
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TitleSpatio-temporal changes of marine macrobenthic community in sub-tropical waters upon recovery from eutrophication. I. Sediment quality and community structure
 
AuthorsShin, PKS1
Lam, NWY1
Wu, RSS1
Qian, PY2
Cheung, SG1
 
KeywordsCommunity structure
Eutrophication
Macrobenthos
Recovery
Sediment quality
 
Issue Date2008
 
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/marpolbul
 
CitationMarine Pollution Bulletin, 2008, v. 56 n. 2, p. 282-296 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.marpolbul.2007.10.023
 
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.
 
ISSN0025-326X
2013 Impact Factor: 2.793
2013 SCImago Journal Rankings: 1.197
 
DOIhttp://dx.doi.org/10.1016/j.marpolbul.2007.10.023
 
ISI Accession Number IDWOS:000254101900022
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorShin, PKS
 
dc.contributor.authorLam, NWY
 
dc.contributor.authorWu, RSS
 
dc.contributor.authorQian, PY
 
dc.contributor.authorCheung, SG
 
dc.date.accessioned2010-09-17T10:56:27Z
 
dc.date.available2010-09-17T10:56:27Z
 
dc.date.issued2008
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationMarine Pollution Bulletin, 2008, v. 56 n. 2, p. 282-296 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.marpolbul.2007.10.023
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.marpolbul.2007.10.023
 
dc.identifier.epage296
 
dc.identifier.isiWOS:000254101900022
 
dc.identifier.issn0025-326X
2013 Impact Factor: 2.793
2013 SCImago Journal Rankings: 1.197
 
dc.identifier.issue2
 
dc.identifier.pmid18061627
 
dc.identifier.scopuseid_2-s2.0-38949102982
 
dc.identifier.spage282
 
dc.identifier.urihttp://hdl.handle.net/10722/92763
 
dc.identifier.volume56
 
dc.languageeng
 
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/marpolbul
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofMarine Pollution Bulletin
 
dc.relation.referencesReferences in Scopus
 
dc.subjectCommunity structure
 
dc.subjectEutrophication
 
dc.subjectMacrobenthos
 
dc.subjectRecovery
 
dc.subjectSediment quality
 
dc.titleSpatio-temporal changes of marine macrobenthic community in sub-tropical waters upon recovery from eutrophication. I. Sediment quality and community structure
 
dc.typeArticle
 
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Author Affiliations
  1. City University of Hong Kong
  2. Hong Kong University of Science and Technology