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Variation of carbon contents in eelgrass (Zostera marina) sediments implied from depth profiles

Kindeberg, Theodor LU ; Röhr, Emilia ; Moksnes, Per-olav ; Boström, Christoffer and Holmer, Marianne (2019) In Biology letters 15(6).
Abstract
Seagrass meadows are able to store significant amounts of organic carbon in their underlying sediment, but global estimates are uncertain partly owing to spatio-temporal heterogeneity between and within areas and species. In order to provide robust estimates, there is a need to better understand the fate of, and mechanisms behind, organic carbon storage. In this observational study, we analyse a suite of biotic and abiotic parameters in sediment cores from 47 different eelgrass (Zostera marina) beds spanning the distributional range of the Northern Hemisphere. Depth profiles of particulate organic carbon (POC) revealed three patterns of vertical distribution where POC either increased, decreased or showed no pattern with sediment depth.... (More)
Seagrass meadows are able to store significant amounts of organic carbon in their underlying sediment, but global estimates are uncertain partly owing to spatio-temporal heterogeneity between and within areas and species. In order to provide robust estimates, there is a need to better understand the fate of, and mechanisms behind, organic carbon storage. In this observational study, we analyse a suite of biotic and abiotic parameters in sediment cores from 47 different eelgrass (Zostera marina) beds spanning the distributional range of the Northern Hemisphere. Depth profiles of particulate organic carbon (POC) revealed three patterns of vertical distribution where POC either increased, decreased or showed no pattern with sediment depth. These categories exhibited distinct profiles of δ13C and C:N ratios, where high POC profiles had a proportionally larger storage of eelgrass-derived material whereas low POC profiles were dominated by phytoplanktonic and macroalgal material. However, high POC did not always translate into high carbon density. Nevertheless, this large-scale dataset provides evidence that the variability in organic matter source in response to natural and anthropogenic environmental changes affects the potential role of eelgrass beds as POC sinks, particularly where eelgrass decline is observed. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Biology letters
volume
15
issue
6
article number
20180831
pages
5 pages
publisher
Royal Society
external identifiers
  • scopus:85068216712
  • pmid:31238855
ISSN
1744-9561
DOI
10.1098/rsbl.2018.0831
language
English
LU publication?
no
id
fe7c31e3-48a2-4674-8621-acd46d3a68d0
alternative location
https://royalsocietypublishing.org/doi/10.1098/rsbl.2018.0831
date added to LUP
2019-06-28 12:42:02
date last changed
2020-01-13 02:08:46
@article{fe7c31e3-48a2-4674-8621-acd46d3a68d0,
  abstract     = {Seagrass meadows are able to store significant amounts of organic carbon in their underlying sediment, but global estimates are uncertain partly owing to spatio-temporal heterogeneity between and within areas and species. In order to provide robust estimates, there is a need to better understand the fate of, and mechanisms behind, organic carbon storage. In this observational study, we analyse a suite of biotic and abiotic parameters in sediment cores from 47 different eelgrass (Zostera marina) beds spanning the distributional range of the Northern Hemisphere. Depth profiles of particulate organic carbon (POC) revealed three patterns of vertical distribution where POC either increased, decreased or showed no pattern with sediment depth. These categories exhibited distinct profiles of δ13C and C:N ratios, where high POC profiles had a proportionally larger storage of eelgrass-derived material whereas low POC profiles were dominated by phytoplanktonic and macroalgal material. However, high POC did not always translate into high carbon density. Nevertheless, this large-scale dataset provides evidence that the variability in organic matter source in response to natural and anthropogenic environmental changes affects the potential role of eelgrass beds as POC sinks, particularly where eelgrass decline is observed.},
  author       = {Kindeberg, Theodor and Röhr, Emilia and Moksnes, Per-olav and Boström, Christoffer and Holmer, Marianne},
  issn         = {1744-9561},
  language     = {eng},
  month        = {06},
  number       = {6},
  publisher    = {Royal Society},
  series       = {Biology letters},
  title        = {Variation of carbon contents in eelgrass (Zostera marina) sediments implied from depth profiles},
  url          = {http://dx.doi.org/10.1098/rsbl.2018.0831},
  doi          = {10.1098/rsbl.2018.0831},
  volume       = {15},
  year         = {2019},
}