Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait)
As climate change is expected to be extremely intense in the Arctic Ocean there is an utmost need to study food-web interactions to contribute to a better understanding of the direction and strength of biogeochemical and microbiological feedback processes. Climate change induced alterations will dir...
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ftawi:oai:epic.awi.de:25194 2023-05-15T14:26:42+02:00 Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) Wurst, Mascha Kilias, Estelle Giebel, Helge-Ansgar Nöthig, Eva-Maria Metfies, Katja Engel, Anja 2011-08 https://epic.awi.de/id/eprint/25194/ https://hdl.handle.net/10013/epic.38847 unknown Wurst, M. , Kilias, E. , Giebel, H. A. , Nöthig, E. M. orcid:0000-0002-7527-7827 , Metfies, K. orcid:0000-0003-3073-8033 and Engel, A. (2011) Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) , The 12th Symposium on Aquatic Microbial Ecology, Rostock, Germany . hdl:10013/epic.38847 EPIC3The 12th Symposium on Aquatic Microbial Ecology, Rostock, Germany Conference notRev 2011 ftawi 2021-12-24T15:35:19Z As climate change is expected to be extremely intense in the Arctic Ocean there is an utmost need to study food-web interactions to contribute to a better understanding of the direction and strength of biogeochemical and microbiological feedback processes. Climate change induced alterations will directly affect food-web structures and ecosystem functioning. Recent studies indicate that environmental changes like increasing temperatures as well as freshening of surface waters promote a shift in the phytoplankton community towards a dominance of smaller cells, especially of eukaryotic picoplankton. The response of oceanic ecosystems and marine carbon cycling to these changes is particularly determined by microbial loop activity. Heterotrophic bacteria, as part of the microbial loop and a crucial component of marine food webs, have a key role in controlling carbon fluxes in the oceans. Microbial activities, dynamics and diversity were studied in the area of the deep-sea long-term observatory HAUSGARTEN of the Alfred-Wegener-Institute (Fram Strait) in July 2009. The investigation area is located within a transition zone between the northern North Atlantic and the central Arctic Ocean, which separates the warm and cold water masses originating from the West Spitzbergen and the East Greenland currents. While bacterial abundance and chlorophyll a were tightly coupled, differences of the planktonic and bacterial community structures are most likely due to the heterogeneous hydrography. Warmer water masses comprise a higher genetic diversity of picoplankton, as it is also expected for bacteria. A shift towards a dominance of smaller plankton species can potentially affect the quality of organic matter and subsequently microbial cycling. Here we present data on bacterial abundance, biomass and protein production, hydrolytical enzyme activities and community structure within different size classes with respect to changing biotic and abiotic conditions in the Fram Strait. Conference Object Arctic Arctic Arctic Ocean Climate change East Greenland Fram Strait Greenland North Atlantic Phytoplankton Spitzbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Greenland |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
As climate change is expected to be extremely intense in the Arctic Ocean there is an utmost need to study food-web interactions to contribute to a better understanding of the direction and strength of biogeochemical and microbiological feedback processes. Climate change induced alterations will directly affect food-web structures and ecosystem functioning. Recent studies indicate that environmental changes like increasing temperatures as well as freshening of surface waters promote a shift in the phytoplankton community towards a dominance of smaller cells, especially of eukaryotic picoplankton. The response of oceanic ecosystems and marine carbon cycling to these changes is particularly determined by microbial loop activity. Heterotrophic bacteria, as part of the microbial loop and a crucial component of marine food webs, have a key role in controlling carbon fluxes in the oceans. Microbial activities, dynamics and diversity were studied in the area of the deep-sea long-term observatory HAUSGARTEN of the Alfred-Wegener-Institute (Fram Strait) in July 2009. The investigation area is located within a transition zone between the northern North Atlantic and the central Arctic Ocean, which separates the warm and cold water masses originating from the West Spitzbergen and the East Greenland currents. While bacterial abundance and chlorophyll a were tightly coupled, differences of the planktonic and bacterial community structures are most likely due to the heterogeneous hydrography. Warmer water masses comprise a higher genetic diversity of picoplankton, as it is also expected for bacteria. A shift towards a dominance of smaller plankton species can potentially affect the quality of organic matter and subsequently microbial cycling. Here we present data on bacterial abundance, biomass and protein production, hydrolytical enzyme activities and community structure within different size classes with respect to changing biotic and abiotic conditions in the Fram Strait. |
format |
Conference Object |
author |
Wurst, Mascha Kilias, Estelle Giebel, Helge-Ansgar Nöthig, Eva-Maria Metfies, Katja Engel, Anja |
spellingShingle |
Wurst, Mascha Kilias, Estelle Giebel, Helge-Ansgar Nöthig, Eva-Maria Metfies, Katja Engel, Anja Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) |
author_facet |
Wurst, Mascha Kilias, Estelle Giebel, Helge-Ansgar Nöthig, Eva-Maria Metfies, Katja Engel, Anja |
author_sort |
Wurst, Mascha |
title |
Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) |
title_short |
Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) |
title_full |
Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) |
title_fullStr |
Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) |
title_full_unstemmed |
Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) |
title_sort |
microbial activities, dynamics and diversity in a changing arctic ocean (fram strait) |
publishDate |
2011 |
url |
https://epic.awi.de/id/eprint/25194/ https://hdl.handle.net/10013/epic.38847 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Arctic Ocean Climate change East Greenland Fram Strait Greenland North Atlantic Phytoplankton Spitzbergen |
genre_facet |
Arctic Arctic Arctic Ocean Climate change East Greenland Fram Strait Greenland North Atlantic Phytoplankton Spitzbergen |
op_source |
EPIC3The 12th Symposium on Aquatic Microbial Ecology, Rostock, Germany |
op_relation |
Wurst, M. , Kilias, E. , Giebel, H. A. , Nöthig, E. M. orcid:0000-0002-7527-7827 , Metfies, K. orcid:0000-0003-3073-8033 and Engel, A. (2011) Microbial activities, dynamics and diversity in a changing Arctic Ocean (Fram Strait) , The 12th Symposium on Aquatic Microbial Ecology, Rostock, Germany . hdl:10013/epic.38847 |
_version_ |
1766299995527446528 |