Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada
Increasing arctic coastal erosion rates imply a greater release of sediments and organic matter into the coastal zone. With 213 sediment samples taken around Herschel Island—Qikiqtaruk, Canadian Beaufort Sea, we aimed to gain new insights on sediment dynamics and geochemical properties of a shallow...
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ftzenodo:oai:zenodo.org:10143668 2024-09-15T17:58:48+00:00 Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada Radosavljevic, Boris Lantuit, Hugues Knoblauch, Christian Couture, Nicole Herzschuh, Ulrike Fritz, Michael 2022-10-27 https://doi.org/10.3390/jmse10111589 https://www.proquest.com/docview/2734631884?pq-origsite=gscholar&fromopenview=true unknown Zenodo https://zenodo.org/communities/nunataryuk https://zenodo.org/communities/eu https://doi.org/10.3390/jmse10111589 oai:zenodo.org:10143668 https://www.proquest.com/docview/2734631884?pq-origsite=gscholar&fromopenview=true info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Journal of Marine Science and Engineering, 10(11), (2022-10-27) info:eu-repo/semantics/article 2022 ftzenodo https://doi.org/10.3390/jmse10111589 2024-07-26T14:18:09Z Increasing arctic coastal erosion rates imply a greater release of sediments and organic matter into the coastal zone. With 213 sediment samples taken around Herschel Island—Qikiqtaruk, Canadian Beaufort Sea, we aimed to gain new insights on sediment dynamics and geochemical properties of a shallow arctic nearshore zone. Spatial characteristics of nearshore sediment texture (moderately to poorly sorted silt) are dictated by hydrodynamic processes, but ice-related processes also play a role. We determined organic matter (OM) distribution and inferred the origin and quality of organic carbon by C/N ratios and stable carbon isotopes δ 13C. The carbon content was higher offshore and in sheltered areas (mean: 1.0 wt.%., S.D.: 0.9) and the C/N ratios also showed a similar spatial pattern (mean: 11.1, S.D.: 3.1), while the δ 13C (mean: −26.4‰ VPDB, S.D.: 0.4) distribution was more complex. We compared the geochemical parameters of our study with terrestrial and marine samples from other studies using a bootstrap approach. Sediments of the current study contained 6.5 times and 1.8 times less total organic carbon than undisturbed and disturbed terrestrial sediments, respectively. Therefore, degradation of OM and separation of carbon pools take place on land and continue in the nearshore zone, where OM is leached, mineralized, or transported beyond the study area. Article in Journal/Newspaper Beaufort Sea Herschel Island Zenodo Journal of Marine Science and Engineering 10 11 1589 |
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description |
Increasing arctic coastal erosion rates imply a greater release of sediments and organic matter into the coastal zone. With 213 sediment samples taken around Herschel Island—Qikiqtaruk, Canadian Beaufort Sea, we aimed to gain new insights on sediment dynamics and geochemical properties of a shallow arctic nearshore zone. Spatial characteristics of nearshore sediment texture (moderately to poorly sorted silt) are dictated by hydrodynamic processes, but ice-related processes also play a role. We determined organic matter (OM) distribution and inferred the origin and quality of organic carbon by C/N ratios and stable carbon isotopes δ 13C. The carbon content was higher offshore and in sheltered areas (mean: 1.0 wt.%., S.D.: 0.9) and the C/N ratios also showed a similar spatial pattern (mean: 11.1, S.D.: 3.1), while the δ 13C (mean: −26.4‰ VPDB, S.D.: 0.4) distribution was more complex. We compared the geochemical parameters of our study with terrestrial and marine samples from other studies using a bootstrap approach. Sediments of the current study contained 6.5 times and 1.8 times less total organic carbon than undisturbed and disturbed terrestrial sediments, respectively. Therefore, degradation of OM and separation of carbon pools take place on land and continue in the nearshore zone, where OM is leached, mineralized, or transported beyond the study area. |
format |
Article in Journal/Newspaper |
author |
Radosavljevic, Boris Lantuit, Hugues Knoblauch, Christian Couture, Nicole Herzschuh, Ulrike Fritz, Michael |
spellingShingle |
Radosavljevic, Boris Lantuit, Hugues Knoblauch, Christian Couture, Nicole Herzschuh, Ulrike Fritz, Michael Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
author_facet |
Radosavljevic, Boris Lantuit, Hugues Knoblauch, Christian Couture, Nicole Herzschuh, Ulrike Fritz, Michael |
author_sort |
Radosavljevic, Boris |
title |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_short |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_full |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_fullStr |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_full_unstemmed |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_sort |
arctic nearshore sediment dynamics—an example from herschel island—qikiqtaruk, canada |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10111589 https://www.proquest.com/docview/2734631884?pq-origsite=gscholar&fromopenview=true |
genre |
Beaufort Sea Herschel Island |
genre_facet |
Beaufort Sea Herschel Island |
op_source |
Journal of Marine Science and Engineering, 10(11), (2022-10-27) |
op_relation |
https://zenodo.org/communities/nunataryuk https://zenodo.org/communities/eu https://doi.org/10.3390/jmse10111589 oai:zenodo.org:10143668 https://www.proquest.com/docview/2734631884?pq-origsite=gscholar&fromopenview=true |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3390/jmse10111589 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
11 |
container_start_page |
1589 |
_version_ |
1810435774397546496 |