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Article: Nutrient limitation in Hong Kong waters inferred from comparison of nutrient ratios, bioassays and 33P turnover times

TitleNutrient limitation in Hong Kong waters inferred from comparison of nutrient ratios, bioassays and 33P turnover times
Authors
Keywords33p turnover times
Hong kong
Light availability
Nutrient enrichment bioassays
Nutrient limitation
Nutrient ratios
Pearl river discharge
Sewage effluent
Issue Date2009
PublisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.html
Citation
Marine Ecology Progress Series, 2009, v. 388, p. 81-97 How to Cite?
AbstractThere is a need to determine the spatial and temporal dynamics of nutrient limitation to decide which nutrients should be removed during sewage treatment in Hong Kong. We compared 3 methods to assess potential or actual nutrient limitation. Ambient nutrient ratios were calculated, and nutrient enrichment bioassays were conducted, along with 33P turnover times. Comparison of nutrient ratios and bioassays demonstrated that the ambient inorganic nutrient ratios, based on the Redfield Si:N:P ratio of 16:16:1, were a rapid and effective method that could be used to predict the potentially limiting nutrient of phytoplankton biomass, except in eastern waters in summer, since the DIN:PO 4 uptake ratio was occasionally below the Redfield ratio. The agreement between nutrient limitation indices of growth rate and biomass yield suggested that phytoplankton biomass and growth rate were P-limited in southern waters, with more stable conditions during summer. In contrast, a lack of agreement between these indicators showed that phytoplankton growth in potentially P-limited cases in western waters and Victoria Harbour was controlled by physical processes (e.g. strong hydrodynamic mixing and dilution). The limiting factor for phytoplankton growth varied spatially and temporally. In summer, there was a change from physical processes (e.g. the rapid dilution and possible light limitation due to strong turbulent mixing) in hydrodynamically active western waters and Victoria Harbour to P limitation, or N + P co-limitation, in southern and eastern waters with more stable conditions. In winter, phytoplankton growth was regulated by strong wind-induced vertical mixing. Hence, different seasonal sewage treatment strategies should be considered for nutrient removal. © Inter-Research 2009.
Persistent Identifierhttp://hdl.handle.net/10722/71556
ISSN
2015 Impact Factor: 2.361
2015 SCImago Journal Rankings: 1.554
ISI Accession Number ID
Funding AgencyGrant Number
University Grants Council of Hong Kong AoE projectAoE/P-04/0401
RGC projectHKUST6478/05
NSFC40676074
40490264
CAS/SAFEA International Partnership Program for Creative Research Teams
NOAA ECOHABNA06-NOS4780245
NIEHS1 P50 ES012742
NSFOCE-0430724
Funding Information:

Financial support for this research was provided by the University Grants Council of Hong Kong AoE project (AoE/P-04/0401) and RGC project HKUST6478/05M. K. Yin acknowledges partial support from NSFC (40676074 and 40490264) and by the CAS/SAFEA International Partnership Program for Creative Research Teams. Support for D.M.A. was provided by NOAA ECOHAB Grant NA06-NOS4780245, NIEHS Grant 1 P50 ES012742 and NSF Grant OCE-0430724. We thank the Hong Kong Government EPD for permitting us to use their water quality monitoring data for this publication.

References

 

DC FieldValueLanguage
dc.contributor.authorXu, Jen_HK
dc.contributor.authorYin, Ken_HK
dc.contributor.authorHo, AYTen_HK
dc.contributor.authorLee, JHWen_HK
dc.contributor.authorAnderson, DMen_HK
dc.contributor.authorHarrison, PJen_HK
dc.date.accessioned2010-09-06T06:33:03Z-
dc.date.available2010-09-06T06:33:03Z-
dc.date.issued2009en_HK
dc.identifier.citationMarine Ecology Progress Series, 2009, v. 388, p. 81-97en_HK
dc.identifier.issn0171-8630en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71556-
dc.description.abstractThere is a need to determine the spatial and temporal dynamics of nutrient limitation to decide which nutrients should be removed during sewage treatment in Hong Kong. We compared 3 methods to assess potential or actual nutrient limitation. Ambient nutrient ratios were calculated, and nutrient enrichment bioassays were conducted, along with 33P turnover times. Comparison of nutrient ratios and bioassays demonstrated that the ambient inorganic nutrient ratios, based on the Redfield Si:N:P ratio of 16:16:1, were a rapid and effective method that could be used to predict the potentially limiting nutrient of phytoplankton biomass, except in eastern waters in summer, since the DIN:PO 4 uptake ratio was occasionally below the Redfield ratio. The agreement between nutrient limitation indices of growth rate and biomass yield suggested that phytoplankton biomass and growth rate were P-limited in southern waters, with more stable conditions during summer. In contrast, a lack of agreement between these indicators showed that phytoplankton growth in potentially P-limited cases in western waters and Victoria Harbour was controlled by physical processes (e.g. strong hydrodynamic mixing and dilution). The limiting factor for phytoplankton growth varied spatially and temporally. In summer, there was a change from physical processes (e.g. the rapid dilution and possible light limitation due to strong turbulent mixing) in hydrodynamically active western waters and Victoria Harbour to P limitation, or N + P co-limitation, in southern and eastern waters with more stable conditions. In winter, phytoplankton growth was regulated by strong wind-induced vertical mixing. Hence, different seasonal sewage treatment strategies should be considered for nutrient removal. © Inter-Research 2009.en_HK
dc.languageengen_HK
dc.publisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.htmlen_HK
dc.relation.ispartofMarine Ecology Progress Seriesen_HK
dc.rightsMarine ecology: progress series. Copyright © Inter-Research.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject33p turnover timesen_HK
dc.subjectHong kongen_HK
dc.subjectLight availabilityen_HK
dc.subjectNutrient enrichment bioassaysen_HK
dc.subjectNutrient limitationen_HK
dc.subjectNutrient ratiosen_HK
dc.subjectPearl river dischargeen_HK
dc.subjectSewage effluenten_HK
dc.titleNutrient limitation in Hong Kong waters inferred from comparison of nutrient ratios, bioassays and 33P turnover timesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0171-8630&volume=388&spage=81&epage=97&date=2009&atitle=Nutrient+limitation+in+Hong+Kong+waters+inferred+from+comparison+of+nutrient+ratios,+bioassays+and+33P+turnover+timesen_HK
dc.identifier.emailLee, JHW: hreclhw@hku.hken_HK
dc.identifier.authorityLee, JHW=rp00061en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.3354/meps08098en_HK
dc.identifier.scopuseid_2-s2.0-69849105206en_HK
dc.identifier.hkuros166523en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-69849105206&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume388en_HK
dc.identifier.spage81en_HK
dc.identifier.epage97en_HK
dc.identifier.isiWOS:000269892700008-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridXu, J=7407002498en_HK
dc.identifier.scopusauthoridYin, K=7101985944en_HK
dc.identifier.scopusauthoridHo, AYT=23667369600en_HK
dc.identifier.scopusauthoridLee, JHW=36078318900en_HK
dc.identifier.scopusauthoridAnderson, DM=7410018378en_HK
dc.identifier.scopusauthoridHarrison, PJ=9533159800en_HK

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