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dc.contributor.authorXu, J.en_US
dc.contributor.authorYin, Kedongen_US
dc.contributor.authorLiu, H.en_US
dc.contributor.authorW Lee, J.en_US
dc.contributor.authorAnderson, D.en_US
dc.contributor.authorHo, A.Y. T.en_US
dc.contributor.authorHarrison, P.en_US
dc.date.accessioned2017-05-03T12:37:49Z
dc.date.available2017-05-03T12:37:49Z
dc.date.issued2010en_US
dc.date.modified2011-03-22T07:06:58Z
dc.identifier.issn09247963en_US
dc.identifier.doi10.1016/j.jmarsys.2010.04.002en_AU
dc.identifier.urihttp://hdl.handle.net/10072/37543
dc.description.abstractEutrophication impacts may vary spatially and temporally due to different physical processes. Using a 22-year time series data set (1986-2007), a comparison was made of eutrophication impacts between the two harbours with very different hydrodynamic conditions. Victoria Harbour (Victoria) receives sewage effluent and therefore nutrients are abundant. In the highly-flushed Victoria, the highest monthly average Chl a (13 姠L-1) occurred during the period of strongest stratification in summer as a result of rainfall, runoff and the input of the nutrient-rich Pearl River estuarine waters, but the high flushing rate restricted nutrient utilization and further accumulation of algal biomass. In other seasons, vertical mixing induced light limitation and horizontal dilution led to low Chl a (< 2 姠L-1) and no spring bloom. Few hypoxic events (DO < 2 mg L-1) occurred due to re-aeration and limited accumulation at depth due to flushing and vertical mixing. Therefore, Victoria is resilient to nutrient enrichment. In contrast, in the weakly-flushed Tolo Harbour (Tolo), year long stratification, long residence times and weak tidal currents favored algal growth, resulting in a spring diatom bloom and high Chl a (10-30 姠L-1) all year and frequent hypoxic events in summer. Hence, Tolo is susceptible to nutrient enrichment and responded to nutrient reduction after sewage diversion in 1997. Sewage diversion from Tolo resulted in a 32-38% decrease in algal biomass in Tolo, but not in Victoria. There has been a significant increase (11-22%) in bottom DO in both harbours. Our findings demonstrate that an understanding of the role of physical processes is critical in order to predict the effectiveness of sewage management strategies in reducing eutrophication impacts.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherElsevier BVen_US
dc.publisher.placeNetherlandsen_US
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom276en_US
dc.relation.ispartofpageto286en_US
dc.relation.ispartofissue3-4en_US
dc.relation.ispartofjournalJournal of Marine Systemsen_US
dc.relation.ispartofvolume83en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchOceanography not elsewhere classifieden_US
dc.subject.fieldofresearchcode040599en_US
dc.titleA comparison of eutrophication impacts in two harbours in Hong Kong with different hydrodynamicsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.date.issued2010
gro.hasfulltextNo Full Text


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