Measuring natural phytoplankton fluorescence and biomass: A case study of algal bloom in the Pearl River estuary
Zhao, J; Cao, WX; Yang, YZ; Wang, GF; Zhou, W; Sun, ZH; wxcao@scsio.ac.cn
2008
发表期刊MARINE POLLUTION BULLETIN
ISSN0025-326X
卷号56期号:10页码:1795-1801
摘要A moored optical buoy was deployed in the Pearl River estuarine waters for a 15-day period. A four-day algal bloom event occurred during this study period. Both chlorophyll a concentration and algal cell density (a proxy for biomass) changed dramatically before and after the event. The chlorophyll concentration at a 2.3 m depth rose from 5.15 Mg/m(-3) at 15:00 h on August 19 to 23.62 Mg/m(-3) at 9:00 h on August 21, and then decreased to 3.24 Mg/m(-3) at 15:00 h on August 24. The corresponding cell density ranged from 1.57 x 10(5) to 1.76 x 10(6) cells/L We used normalized fluorescence line height (NFLH) and normalized fluorescence intensity (NFI) in order to determine fluorescence activity. Combined with the in situ sampling dataset, we were able to correlate natural fluorescence (NFLH and NFI) with chlorophyll a concentrations, and found correlation coefficients of 0.72 and 0.75, respectively. We also found correlations between natural fluorescence and cell density, with correlation coefficients of 0.71 and 0.65, respectively. These results indicate that applying continuous time series of natural fluorescence can reflect changes in biomass. This technique will prove extremely useful for in situ and real-time observations using an optical buoy. Although there are still problems to solve in the real-time observation of natural fluorescence in algal bloom events, we discuss the primary factors affecting fluorescence signals and suggest possible methods for mitigating these issues. (C) 2008 Elsevier Ltd. All rights reserved.
部门归属[Zhao, Jun; Cao, Wenxi; Yang, Yuezhong; Wang, Guifen; Zhou, Wen; Sun, Zhaohua] Chinese Acad Sci, LED, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Zhao, Jun; Wang, Guifen; Zhou, Wen] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
关键词Natural Fluorescence Biomass Algal Bloom Optical Buoy
学科领域Environmental Sciences ; Marine & Freshwater Biology
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收录类别sci
资助项目LED
WOS记录号WOS:000260745300024
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/5935
专题热带海洋环境国家重点实验室(LTO)
通讯作者wxcao@scsio.ac.cn
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GB/T 7714
Zhao, J,Cao, WX,Yang, YZ,et al. Measuring natural phytoplankton fluorescence and biomass: A case study of algal bloom in the Pearl River estuary[J]. MARINE POLLUTION BULLETIN,2008,56(10):1795-1801.
APA Zhao, J.,Cao, WX.,Yang, YZ.,Wang, GF.,Zhou, W.,...&wxcao@scsio.ac.cn.(2008).Measuring natural phytoplankton fluorescence and biomass: A case study of algal bloom in the Pearl River estuary.MARINE POLLUTION BULLETIN,56(10),1795-1801.
MLA Zhao, J,et al."Measuring natural phytoplankton fluorescence and biomass: A case study of algal bloom in the Pearl River estuary".MARINE POLLUTION BULLETIN 56.10(2008):1795-1801.
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