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学科主题: Marine & Freshwater Biology
题名: Stable carbon isotope variations in surface bloom scum and subsurface seston among shallow eutrophic lakes
作者: Xu, Jun; Zhang, Min; Xie, Ping
通讯作者: Xie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
关键词: bloom scum ; eutrophic lakes ; seston ; stable carbon isotope
刊名: HARMFUL ALGAE
发表日期: 2007-10-01
DOI: 10.1016/j.hal.2007.02.002
卷: 6, 期:5, 页:679-685
收录类别: SCI
文章类型: Article
部门归属: Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China; Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Marine & Freshwater Biology
研究领域[WOS]: Marine & Freshwater Biology
摘要: Carbon stable isotope analysis of surface bloom scum and subsurface seston samples was conducted in shallow eutrophic lakes in China during warm seasons from 2003 to 2004. delta C-13 values of bloom scum were always higher (averaged 5 parts per thousand) than those of seston in this study, and the possible reasons were attributed to (i) direct use of atmospheric CO2 at the air-water interface, (ii) decrease in C-13 fractionation due to higher carbon fixation, (iii) active CO2 transport, and/or (iv) HCO3 accumulation. Negative correlation between delta C-13(scum) - delta C-13(seston) and pH in the test lakes indicated that phytoplankton at the subsurface water column increased isotopic enrichment under the-carbon limitation along with the increase of pH, which might in turn decreased the differences in 313 C between the subsurface seston and the surface scums. Significant positive correlations of seston 8 13C with total concentrations of nitrogen and phosphorus in water column suggested that the increase in delta C-13 of seston with trophic state was depending on nutrient (N or P, or both) supply. Our study showed that delta C-13 of phytoplankton was indicative of carbon utilization, primary productivity, and nutrient supply among the eutrophic lakes. (C) 2007 Elsevier B.V All rights reserved.
英文摘要: Carbon stable isotope analysis of surface bloom scum and subsurface seston samples was conducted in shallow eutrophic lakes in China during warm seasons from 2003 to 2004. delta C-13 values of bloom scum were always higher (averaged 5 parts per thousand) than those of seston in this study, and the possible reasons were attributed to (i) direct use of atmospheric CO2 at the air-water interface, (ii) decrease in C-13 fractionation due to higher carbon fixation, (iii) active CO2 transport, and/or (iv) HCO3 accumulation. Negative correlation between delta C-13(scum) - delta C-13(seston) and pH in the test lakes indicated that phytoplankton at the subsurface water column increased isotopic enrichment under the-carbon limitation along with the increase of pH, which might in turn decreased the differences in 313 C between the subsurface seston and the surface scums. Significant positive correlations of seston 8 13C with total concentrations of nitrogen and phosphorus in water column suggested that the increase in delta C-13 of seston with trophic state was depending on nutrient (N or P, or both) supply. Our study showed that delta C-13 of phytoplankton was indicative of carbon utilization, primary productivity, and nutrient supply among the eutrophic lakes. (C) 2007 Elsevier B.V All rights reserved.
关键词[WOS]: PARTICULATE ORGANIC-MATTER ; WATER-BLOOMS ; FOOD-WEB ; NITROGEN ; PHYTOPLANKTON ; DELTA-C-13 ; DELTA-N-15 ; PRODUCTIVITY ; CO2 ; SIGNATURES
语种: 英语
WOS记录号: WOS:000249681600007
ISSN号: 1568-9883
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8414
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2.Huazhong Agr Univ, Coll Fisheries, Wuhan 430070, Peoples R China

Recommended Citation:
Xu, Jun; Zhang, Min; Xie, Ping.Stable carbon isotope variations in surface bloom scum and subsurface seston among shallow eutrophic lakes,HARMFUL ALGAE,2007,6(5):679-685
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