Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches
Polar ecosystems thrive significantly on carbon synthesized by sea ice-associated microalgae. The underside of sea ice in polar regions represents a natural habitat for heterotrophic organisms, e. g. copepods and amphipods. The under-ice fauna plays a key role in transferring ice algae-produced carb...
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ftawi:oai:epic.awi.de:37562 2023-05-15T14:23:28+02:00 Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches Kohlbach, Doreen Graeve, Martin David, Carmen Lange, Benjamin Flores, Hauke 2015-01-22 https://epic.awi.de/id/eprint/37562/ https://hdl.handle.net/10013/epic.50439 unknown Kohlbach, D. , Graeve, M. orcid:0000-0002-2294-1915 , David, C. , Lange, B. and Flores, H. orcid:0000-0003-1617-5449 (2015) Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches , Arctic Frontiers 2015, Tromsö, Norway, 21 January 2015 - 23 January 2015 . hdl:10013/epic.50439 EPIC3Arctic Frontiers 2015, Tromsö, Norway, 2015-01-21-2015-01-23 Conference notRev 2015 ftawi 2021-12-24T15:40:20Z Polar ecosystems thrive significantly on carbon synthesized by sea ice-associated microalgae. The underside of sea ice in polar regions represents a natural habitat for heterotrophic organisms, e. g. copepods and amphipods. The under-ice fauna plays a key role in transferring ice algae-produced carbon into pelagic and benthic food webs of polar ecosystems. The under-ice community and the associated pelagic food webs are largely affected by climate change accompanied by the reduction of sea ice coverage and increase in the duration of the melt season. Until now, the degree to which Arctic marine food webs depend on sea ice-derived carbon is still unclear. In order to improve our understanding of the potential ecological consequences of a changing sea ice environment, we aimed to quantify the transfer of ice algae-produced carbon into the under-ice community and from there into pelagic food webs. Sample collection was carried out during the RV Polarstern expedition of ARK XXVII-3 (August-September 2012) throughout the Eastern Central Arctic Ocean north of 80°N. The carbon sources of abundant under-ice zooplankton species were studied using stable isotope analysis (SIA) of natural abundance carbon and nitrogen, and lipid fingerprinting.Compound-specific SIA (CSIA) of fatty acid trophic markers (FATM) was used to separate the trophic signal of phytoplankton FATM from those of ice algae. Mixing models were used to determine the relative contribution of FATM of the two carbon sources. We found the Arctic copepods Calanus glacialis and Calanus hyperboreus feeding on both, ice algae and pelagic phytoplankton. Several amphipod species demonstrated a high dietary dependency on ice algae. Conference Object Arctic Arctic Arctic Ocean Calanus glacialis Calanus hyperboreus Climate change ice algae Phytoplankton Sea ice Zooplankton Copepods Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Polar ecosystems thrive significantly on carbon synthesized by sea ice-associated microalgae. The underside of sea ice in polar regions represents a natural habitat for heterotrophic organisms, e. g. copepods and amphipods. The under-ice fauna plays a key role in transferring ice algae-produced carbon into pelagic and benthic food webs of polar ecosystems. The under-ice community and the associated pelagic food webs are largely affected by climate change accompanied by the reduction of sea ice coverage and increase in the duration of the melt season. Until now, the degree to which Arctic marine food webs depend on sea ice-derived carbon is still unclear. In order to improve our understanding of the potential ecological consequences of a changing sea ice environment, we aimed to quantify the transfer of ice algae-produced carbon into the under-ice community and from there into pelagic food webs. Sample collection was carried out during the RV Polarstern expedition of ARK XXVII-3 (August-September 2012) throughout the Eastern Central Arctic Ocean north of 80°N. The carbon sources of abundant under-ice zooplankton species were studied using stable isotope analysis (SIA) of natural abundance carbon and nitrogen, and lipid fingerprinting.Compound-specific SIA (CSIA) of fatty acid trophic markers (FATM) was used to separate the trophic signal of phytoplankton FATM from those of ice algae. Mixing models were used to determine the relative contribution of FATM of the two carbon sources. We found the Arctic copepods Calanus glacialis and Calanus hyperboreus feeding on both, ice algae and pelagic phytoplankton. Several amphipod species demonstrated a high dietary dependency on ice algae. |
format |
Conference Object |
author |
Kohlbach, Doreen Graeve, Martin David, Carmen Lange, Benjamin Flores, Hauke |
spellingShingle |
Kohlbach, Doreen Graeve, Martin David, Carmen Lange, Benjamin Flores, Hauke Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches |
author_facet |
Kohlbach, Doreen Graeve, Martin David, Carmen Lange, Benjamin Flores, Hauke |
author_sort |
Kohlbach, Doreen |
title |
Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches |
title_short |
Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches |
title_full |
Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches |
title_fullStr |
Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches |
title_full_unstemmed |
Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches |
title_sort |
transfer of ice algae-based energy in a summerly arctic ocean: food web insights revealed by state-of-the-art biomarker approaches |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/37562/ https://hdl.handle.net/10013/epic.50439 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Calanus glacialis Calanus hyperboreus Climate change ice algae Phytoplankton Sea ice Zooplankton Copepods |
genre_facet |
Arctic Arctic Arctic Ocean Calanus glacialis Calanus hyperboreus Climate change ice algae Phytoplankton Sea ice Zooplankton Copepods |
op_source |
EPIC3Arctic Frontiers 2015, Tromsö, Norway, 2015-01-21-2015-01-23 |
op_relation |
Kohlbach, D. , Graeve, M. orcid:0000-0002-2294-1915 , David, C. , Lange, B. and Flores, H. orcid:0000-0003-1617-5449 (2015) Transfer of ice algae-based energy in a summerly Arctic Ocean: Food web insights revealed by state-of-the-art biomarker approaches , Arctic Frontiers 2015, Tromsö, Norway, 21 January 2015 - 23 January 2015 . hdl:10013/epic.50439 |
_version_ |
1766296009987588096 |