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学科主题: Ecology; Marine & Freshwater Biology; Oceanography
题名: Nutrient limitation in Hong Kong waters inferred from comparison of nutrient ratios, bioassays and P-33 turnover times
作者: Xu, J ; Yin, KD ; Ho, AYT ; Lee, JHW ; Anderson, DM ; Harrison, PJ
通讯作者: xujie@ust.hk
关键词: Nutrient ratios ; Nutrient enrichment bioassays ; P-33 turnover times ; Pearl River discharge ; Sewage effluent ; Hong Kong ; Nutrient limitation ; Light availability
刊名: MARINE ECOLOGY-PROGRESS SERIES
发表日期: 2009
卷: 388, 页:81-97
收录类别: sci
部门归属: [Xu, Jie; Ho, Alvin Y. T.; Harrison, Paul J.] Hong Kong Univ Sci & Technol, Atmospher Marine & Coastal Environm AMCE Program, Kowloon, Hong Kong, Peoples R China; [Yin, Kedong] Chinese Acad Sci, Key Lab Trop Marine Environm Dynam, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China; [Lee, Joseph H. W.] Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China; [Anderson, Donald M.] Woods Hole Oceanog Inst, Dept Biol, Woods Hole, MA 02543 USA
项目归属: LED
摘要: There 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 P-33 turnover times. Comparison of nutrient ratios and bioassays demonstrated that the ambient inorganic nutrient ratios, based on the Red-field 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:PO4 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.
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WOS记录号: WOS:000269892700008
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6085
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Recommended Citation:
Xu, J; Yin, KD; Ho, AYT; Lee, JHW; Anderson, DM; Harrison, PJ.Nutrient limitation in Hong Kong waters inferred from comparison of nutrient ratios, bioassays and P-33 turnover times,MARINE ECOLOGY-PROGRESS SERIES,2009,388():81-97
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