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Stable carbon isotope variations in surface bloom scum and subsurface seston among shallow eutrophic lakes
Xu, Jun; Zhang, Min; Xie, Ping; Xie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2007-10-01
Source PublicationHARMFUL ALGAE
ISSN1568-9883
Volume6Issue:5Pages:679-685
AbstractCarbon 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.; 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.
SubtypeArticle
KeywordBloom Scum Eutrophic Lakes Seston Stable Carbon Isotope
DepartmentChinese 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
Subject AreaMarine & Freshwater Biology
DOI10.1016/j.hal.2007.02.002
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectMarine & Freshwater Biology
WOS IDWOS:000249681600007
WOS KeywordPARTICULATE ORGANIC-MATTER ; WATER-BLOOMS ; FOOD-WEB ; NITROGEN ; PHYTOPLANKTON ; DELTA-C-13 ; DELTA-N-15 ; PRODUCTIVITY ; CO2 ; SIGNATURES
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8414
Collection期刊论文
Corresponding AuthorXie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Affiliation1.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
GB/T 7714
Xu, Jun,Zhang, Min,Xie, Ping,et al. Stable carbon isotope variations in surface bloom scum and subsurface seston among shallow eutrophic lakes[J]. HARMFUL ALGAE,2007,6(5):679-685.
APA Xu, Jun,Zhang, Min,Xie, Ping,&Xie, P, Chinese Acad Sci, Inst Hydrobiol, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.(2007).Stable carbon isotope variations in surface bloom scum and subsurface seston among shallow eutrophic lakes.HARMFUL ALGAE,6(5),679-685.
MLA Xu, Jun,et al."Stable carbon isotope variations in surface bloom scum and subsurface seston among shallow eutrophic lakes".HARMFUL ALGAE 6.5(2007):679-685.
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