The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting
10th Scientific Committee on Antarctic Research Open Science Conference (SCAR 2022), 1-10 August 2022 Mass and energy (e.g., organic carbon) fluxes in the marine water column are important to refine estimations on biogeochemical cycle dynamics (e.g., C and Si) and atmospheric carbon sinks into the o...
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Scientific Committee on Antarctic Research
2022
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ftcsic:oai:digital.csic.es:10261/333858 2024-02-11T09:56:46+01:00 The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting Isla, Enrique Menschel, Eduardo González, Humberto E. 2022-08-01 http://hdl.handle.net/10261/333858 en eng Scientific Committee on Antarctic Research Sí 10th SCAR Open Science Conference (2022) http://hdl.handle.net/10261/333858 none Conserve and sustainably use the oceans seas and marine resources for sustainable development comunicación de congreso 2022 ftcsic 2024-01-16T11:52:14Z 10th Scientific Committee on Antarctic Research Open Science Conference (SCAR 2022), 1-10 August 2022 Mass and energy (e.g., organic carbon) fluxes in the marine water column are important to refine estimations on biogeochemical cycle dynamics (e.g., C and Si) and atmospheric carbon sinks into the ocean. In Antarctic offshore areas, >95% of these annual fluxes develop during the spring and summer; however, these information is scarce for the coastal environment. This province exports organic matter to the adjacent offshore areas becoming an important energy reservoir for life in the oceanic vicinity. In the present study, we set a sediment trap to assess near shore particle fluxes in Doumer Island’s South Bay (Gerlache Strait), off the Chilean Antarctic Research Station “Yelcho”. Particle fluxes collected at 190 m water depth on a site at 240 m water depth showed that organic carbon (OC), biogenic silica (bSi) and faecal pellet fluxes in the autumn were similar to those observed during the late summer. Microplankton (e.g. diatom, flagellates, tintinnids) fluxes were clearly dominated by diatoms along the study. In contrast, flagellates were more seasonal. Autumn OC and bSi fluxes were higher than those collected elsewhere in the oceanic Antarctic and for OC, comparable to the results of the only study developed at the coastal Antarctic, at Deception Island in the Bransfield Strait. Our results demonstrate the importance of the autumn biogenic matter fluxes in the annual context, remark the importance of coastal zone biogenic matter exports for the oceanic province and raise the question on whether this is a consequence of climate change in the Antarctic Peer reviewed Conference Object Antarc* Antarctic Bransfield Strait Deception Island SCAR Scientific Committee on Antarctic Research Digital.CSIC (Spanish National Research Council) Antarctic The Antarctic Bransfield Strait Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Gerlache Strait ENVELOPE(-62.333,-62.333,-64.500,-64.500) South Bay ENVELOPE(-63.579,-63.579,-64.870,-64.870) Yelcho ENVELOPE(-63.583,-63.583,-64.833,-64.833) Doumer ENVELOPE(-63.583,-63.583,-64.850,-64.850) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Conserve and sustainably use the oceans seas and marine resources for sustainable development |
spellingShingle |
Conserve and sustainably use the oceans seas and marine resources for sustainable development Isla, Enrique Menschel, Eduardo González, Humberto E. The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting |
topic_facet |
Conserve and sustainably use the oceans seas and marine resources for sustainable development |
description |
10th Scientific Committee on Antarctic Research Open Science Conference (SCAR 2022), 1-10 August 2022 Mass and energy (e.g., organic carbon) fluxes in the marine water column are important to refine estimations on biogeochemical cycle dynamics (e.g., C and Si) and atmospheric carbon sinks into the ocean. In Antarctic offshore areas, >95% of these annual fluxes develop during the spring and summer; however, these information is scarce for the coastal environment. This province exports organic matter to the adjacent offshore areas becoming an important energy reservoir for life in the oceanic vicinity. In the present study, we set a sediment trap to assess near shore particle fluxes in Doumer Island’s South Bay (Gerlache Strait), off the Chilean Antarctic Research Station “Yelcho”. Particle fluxes collected at 190 m water depth on a site at 240 m water depth showed that organic carbon (OC), biogenic silica (bSi) and faecal pellet fluxes in the autumn were similar to those observed during the late summer. Microplankton (e.g. diatom, flagellates, tintinnids) fluxes were clearly dominated by diatoms along the study. In contrast, flagellates were more seasonal. Autumn OC and bSi fluxes were higher than those collected elsewhere in the oceanic Antarctic and for OC, comparable to the results of the only study developed at the coastal Antarctic, at Deception Island in the Bransfield Strait. Our results demonstrate the importance of the autumn biogenic matter fluxes in the annual context, remark the importance of coastal zone biogenic matter exports for the oceanic province and raise the question on whether this is a consequence of climate change in the Antarctic Peer reviewed |
format |
Conference Object |
author |
Isla, Enrique Menschel, Eduardo González, Humberto E. |
author_facet |
Isla, Enrique Menschel, Eduardo González, Humberto E. |
author_sort |
Isla, Enrique |
title |
The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting |
title_short |
The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting |
title_full |
The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting |
title_fullStr |
The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting |
title_full_unstemmed |
The Fall: insights into biogenic matter fluxes beyond the summer in an Antarctic coastal setting |
title_sort |
fall: insights into biogenic matter fluxes beyond the summer in an antarctic coastal setting |
publisher |
Scientific Committee on Antarctic Research |
publishDate |
2022 |
url |
http://hdl.handle.net/10261/333858 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-62.333,-62.333,-64.500,-64.500) ENVELOPE(-63.579,-63.579,-64.870,-64.870) ENVELOPE(-63.583,-63.583,-64.833,-64.833) ENVELOPE(-63.583,-63.583,-64.850,-64.850) |
geographic |
Antarctic The Antarctic Bransfield Strait Deception Island Gerlache Gerlache Strait South Bay Yelcho Doumer |
geographic_facet |
Antarctic The Antarctic Bransfield Strait Deception Island Gerlache Gerlache Strait South Bay Yelcho Doumer |
genre |
Antarc* Antarctic Bransfield Strait Deception Island SCAR Scientific Committee on Antarctic Research |
genre_facet |
Antarc* Antarctic Bransfield Strait Deception Island SCAR Scientific Committee on Antarctic Research |
op_relation |
Sí 10th SCAR Open Science Conference (2022) http://hdl.handle.net/10261/333858 |
op_rights |
none |
_version_ |
1790605689546080256 |