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学科主题: Environmental Sciences; Marine & Freshwater Biology
题名: Measuring natural phytoplankton fluorescence and biomass: A case study of algal bloom in the Pearl River estuary
作者: Zhao, J ; Cao, WX ; Yang, YZ ; Wang, GF ; Zhou, W ; Sun, ZH
通讯作者: wxcao@scsio.ac.cn
关键词: Natural fluorescence ; Biomass ; Algal bloom ; Optical buoy
刊名: MARINE POLLUTION BULLETIN
发表日期: 2008
卷: 56, 期:10, 页:1795-1801
收录类别: sci
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
项目归属: LED
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.
原文出处: 查看原文
WOS记录号: WOS:000260745300024
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5935
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Zhao, J; Cao, WX; Yang, YZ; Wang, GF; Zhou, W; Sun, ZH.Measuring natural phytoplankton fluorescence and biomass: A case study of algal bloom in the Pearl River estuary,MARINE POLLUTION BULLETIN,2008,56(10):1795-1801
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