Detrital carbon production and export in high latitude kelp forests
The production and fate of seaweed detritus is a major unknown in the global C-budget. Knowing the quantity of detritus produced, the form it takes (size) and its timing of delivery are key to understanding its role as a resource subsidy to secondary production and/or its potential contribution to C...
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/2683120 https://doi.org/10.1007/s00442-019-04573-z |
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ftimr:oai:imr.brage.unit.no:11250/2683120 2023-05-15T17:43:34+02:00 Detrital carbon production and export in high latitude kelp forests Pedersen, Morten Foldager Filbee-Dexter, Karen Norderhaug, Kjell Magnus Fredriksen, Stein Frisk, Nicolai Lond Fagerli, Camilla With Wernberg, Thomas 2020 application/pdf https://hdl.handle.net/11250/2683120 https://doi.org/10.1007/s00442-019-04573-z eng eng Norges forskningsråd: 255085 Oecologia. 2020, 192 (1), 227-239. urn:issn:0029-8549 https://hdl.handle.net/11250/2683120 https://doi.org/10.1007/s00442-019-04573-z cristin:1815844 227-239 192 Oecologia 1 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1007/s00442-019-04573-z 2021-09-23T20:15:06Z The production and fate of seaweed detritus is a major unknown in the global C-budget. Knowing the quantity of detritus produced, the form it takes (size) and its timing of delivery are key to understanding its role as a resource subsidy to secondary production and/or its potential contribution to C-sequestration. We quantified the production and release of detritus from 10 Laminaria hyperborea sites in northern Norway (69.6° N). Kelp biomass averaged 770 ± 100 g C m−2 while net production reached 499 ± 50 g C m−2 year−1, with most taking place in spring when new blades were formed. Production of biomass was balanced by a similar formation of detritus (478 ± 41 g C m−2 year−1), and both were unrelated to wave exposure when compared across sites. Distal blade erosion accounted for 23% of the total detritus production and was highest during autumn and winter, while dislodgment of whole individuals and/or whole blades corresponded to 24% of the detritus production. Detachment of old blades constituted the largest source of kelp detritus, accounting for > 50% of the total detrital production. Almost 80% of the detritus from L. hyperborea was thus in the form of whole plants or blades and > 60% of that was delivered as a large pulse within 1–2 months in spring. The discrete nature of the delivery suggests that the detritus cannot be retained and consumed locally and that some is exported to adjacent deep areas where it may subsidize secondary production or become buried into deep marine sediments as blue carbon. acceptedVersion Article in Journal/Newspaper Northern Norway Institute for Marine Research: Brage IMR Norway Oecologia 192 1 227 239 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
The production and fate of seaweed detritus is a major unknown in the global C-budget. Knowing the quantity of detritus produced, the form it takes (size) and its timing of delivery are key to understanding its role as a resource subsidy to secondary production and/or its potential contribution to C-sequestration. We quantified the production and release of detritus from 10 Laminaria hyperborea sites in northern Norway (69.6° N). Kelp biomass averaged 770 ± 100 g C m−2 while net production reached 499 ± 50 g C m−2 year−1, with most taking place in spring when new blades were formed. Production of biomass was balanced by a similar formation of detritus (478 ± 41 g C m−2 year−1), and both were unrelated to wave exposure when compared across sites. Distal blade erosion accounted for 23% of the total detritus production and was highest during autumn and winter, while dislodgment of whole individuals and/or whole blades corresponded to 24% of the detritus production. Detachment of old blades constituted the largest source of kelp detritus, accounting for > 50% of the total detrital production. Almost 80% of the detritus from L. hyperborea was thus in the form of whole plants or blades and > 60% of that was delivered as a large pulse within 1–2 months in spring. The discrete nature of the delivery suggests that the detritus cannot be retained and consumed locally and that some is exported to adjacent deep areas where it may subsidize secondary production or become buried into deep marine sediments as blue carbon. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Pedersen, Morten Foldager Filbee-Dexter, Karen Norderhaug, Kjell Magnus Fredriksen, Stein Frisk, Nicolai Lond Fagerli, Camilla With Wernberg, Thomas |
spellingShingle |
Pedersen, Morten Foldager Filbee-Dexter, Karen Norderhaug, Kjell Magnus Fredriksen, Stein Frisk, Nicolai Lond Fagerli, Camilla With Wernberg, Thomas Detrital carbon production and export in high latitude kelp forests |
author_facet |
Pedersen, Morten Foldager Filbee-Dexter, Karen Norderhaug, Kjell Magnus Fredriksen, Stein Frisk, Nicolai Lond Fagerli, Camilla With Wernberg, Thomas |
author_sort |
Pedersen, Morten Foldager |
title |
Detrital carbon production and export in high latitude kelp forests |
title_short |
Detrital carbon production and export in high latitude kelp forests |
title_full |
Detrital carbon production and export in high latitude kelp forests |
title_fullStr |
Detrital carbon production and export in high latitude kelp forests |
title_full_unstemmed |
Detrital carbon production and export in high latitude kelp forests |
title_sort |
detrital carbon production and export in high latitude kelp forests |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2683120 https://doi.org/10.1007/s00442-019-04573-z |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
227-239 192 Oecologia 1 |
op_relation |
Norges forskningsråd: 255085 Oecologia. 2020, 192 (1), 227-239. urn:issn:0029-8549 https://hdl.handle.net/11250/2683120 https://doi.org/10.1007/s00442-019-04573-z cristin:1815844 |
op_doi |
https://doi.org/10.1007/s00442-019-04573-z |
container_title |
Oecologia |
container_volume |
192 |
container_issue |
1 |
container_start_page |
227 |
op_container_end_page |
239 |
_version_ |
1766145673516810240 |