Stable carbon isotope biogeochemistry of lakes along a trophic gradient
The stable carbon (C) isotope variability of dissolved inorganic and organic C (DIC and DOC), particulate organic carbon (POC), glucose and polar-lipid derived fatty acids (PLFAs) was studied in a survey of 22 North American oligotrophic to eutrophic lakes. The δ<sup>13</sup>C of differe...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2014-11-01
|
| Series: | Biogeosciences |
| Online Access: | http://www.biogeosciences.net/11/6265/2014/bg-11-6265-2014.pdf |
| _version_ | 1818322209533329408 |
|---|---|
| author | A. de Kluijver P. L. Schoon J. A. Downing S. Schouten J. J. Middelburg |
| author_facet | A. de Kluijver P. L. Schoon J. A. Downing S. Schouten J. J. Middelburg |
| author_sort | A. de Kluijver |
| collection | DOAJ |
| description | The stable carbon (C) isotope variability of dissolved inorganic and organic
C (DIC and DOC), particulate organic carbon (POC), glucose and polar-lipid
derived fatty acids (PLFAs) was studied in a survey of 22 North American
oligotrophic to eutrophic lakes. The δ<sup>13</sup>C of different PLFAs were
used as proxy for phytoplankton producers and bacterial consumers. Lake
<i>p</i>CO<sub>2</sub> was primarily determined by autochthonous production
(phytoplankton biomass), especially in eutrophic lakes, and governed the
δ<sup>13</sup>C of DIC. All organic-carbon pools showed overall higher
isotopic variability in eutrophic lakes (<i>n</i> = 11) compared to
oligo-mesotrophic lakes (<i>n</i> = 11) because of the high variability in
δ<sup>13</sup>C at the base of the food web (both autochthonous and
allochthonous carbon). Phytoplankton δ<sup>13</sup>C was negatively related to
lake <i>p</i>CO<sub>2</sub> over all lakes and positively related to phytoplankton
biomass in eutrophic lakes, which was also reflected in a large range in
photosynthetic isotope fractionation (ϵ<sub>CO<sub>2-phyto</sub></sub>,
8–25‰). The carbon isotope ratio of
allochthonous carbon in oligo-mesotrophic lakes was rather constant, while it
varied in eutrophic lakes because of maize cultivation in the watershed. |
| first_indexed | 2024-12-13T10:53:10Z |
| format | Article |
| id | doaj.art-c4d8fe30d8b1405abc259143a8061d21 |
| institution | Directory Open Access Journal |
| issn | 1726-4170 1726-4189 |
| language | English |
| last_indexed | 2024-12-13T10:53:10Z |
| publishDate | 2014-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Biogeosciences |
| spelling | doaj.art-c4d8fe30d8b1405abc259143a8061d212022-12-21T23:49:44ZengCopernicus PublicationsBiogeosciences1726-41701726-41892014-11-0111226265627610.5194/bg-11-6265-2014Stable carbon isotope biogeochemistry of lakes along a trophic gradientA. de Kluijver0P. L. Schoon1J. A. Downing2S. Schouten3J. J. Middelburg4Department of Ecosystems Studies, NIOZ Royal Netherlands Institute for Sea Research, Yerseke, the NetherlandsDepartment of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, Den Burg, the NetherlandsDepartment of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USADepartment of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, Den Burg, the NetherlandsDepartment of Ecosystems Studies, NIOZ Royal Netherlands Institute for Sea Research, Yerseke, the NetherlandsThe stable carbon (C) isotope variability of dissolved inorganic and organic C (DIC and DOC), particulate organic carbon (POC), glucose and polar-lipid derived fatty acids (PLFAs) was studied in a survey of 22 North American oligotrophic to eutrophic lakes. The δ<sup>13</sup>C of different PLFAs were used as proxy for phytoplankton producers and bacterial consumers. Lake <i>p</i>CO<sub>2</sub> was primarily determined by autochthonous production (phytoplankton biomass), especially in eutrophic lakes, and governed the δ<sup>13</sup>C of DIC. All organic-carbon pools showed overall higher isotopic variability in eutrophic lakes (<i>n</i> = 11) compared to oligo-mesotrophic lakes (<i>n</i> = 11) because of the high variability in δ<sup>13</sup>C at the base of the food web (both autochthonous and allochthonous carbon). Phytoplankton δ<sup>13</sup>C was negatively related to lake <i>p</i>CO<sub>2</sub> over all lakes and positively related to phytoplankton biomass in eutrophic lakes, which was also reflected in a large range in photosynthetic isotope fractionation (ϵ<sub>CO<sub>2-phyto</sub></sub>, 8–25‰). The carbon isotope ratio of allochthonous carbon in oligo-mesotrophic lakes was rather constant, while it varied in eutrophic lakes because of maize cultivation in the watershed.http://www.biogeosciences.net/11/6265/2014/bg-11-6265-2014.pdf |
| spellingShingle | A. de Kluijver P. L. Schoon J. A. Downing S. Schouten J. J. Middelburg Stable carbon isotope biogeochemistry of lakes along a trophic gradient Biogeosciences |
| title | Stable carbon isotope biogeochemistry of lakes along a trophic gradient |
| title_full | Stable carbon isotope biogeochemistry of lakes along a trophic gradient |
| title_fullStr | Stable carbon isotope biogeochemistry of lakes along a trophic gradient |
| title_full_unstemmed | Stable carbon isotope biogeochemistry of lakes along a trophic gradient |
| title_short | Stable carbon isotope biogeochemistry of lakes along a trophic gradient |
| title_sort | stable carbon isotope biogeochemistry of lakes along a trophic gradient |
| url | http://www.biogeosciences.net/11/6265/2014/bg-11-6265-2014.pdf |
| work_keys_str_mv | AT adekluijver stablecarbonisotopebiogeochemistryoflakesalongatrophicgradient AT plschoon stablecarbonisotopebiogeochemistryoflakesalongatrophicgradient AT jadowning stablecarbonisotopebiogeochemistryoflakesalongatrophicgradient AT sschouten stablecarbonisotopebiogeochemistryoflakesalongatrophicgradient AT jjmiddelburg stablecarbonisotopebiogeochemistryoflakesalongatrophicgradient |