Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions
The present study explored the selective feeding properties of Antarctic and Arctic deep-sea nematodes within an experimental setup. Nematodes are assumed to play an important role in the carbon flux within the polar bathyal food webs, but knowledge about their natural diets is limited. For the firs...
Published in: | Marine Ecology Progress Series |
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Online Access: | https://research.wur.nl/en/publications/preferred-use-of-bacteria-over-phytoplankton-by-deep-sea-nematode https://doi.org/10.3354/meps08535 |
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ftunivwagenin:oai:library.wur.nl:wurpubs/407395 2024-02-04T09:54:36+01:00 Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions Ingels, J. Van den Driessche, P. de Mesel, I.G. Vanhove, S. Moens, T. Vanreusel, A. 2010 application/pdf https://research.wur.nl/en/publications/preferred-use-of-bacteria-over-phytoplankton-by-deep-sea-nematode https://doi.org/10.3354/meps08535 en eng https://edepot.wur.nl/174961 https://research.wur.nl/en/publications/preferred-use-of-bacteria-over-phytoplankton-by-deep-sea-nematode doi:10.3354/meps08535 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Marine Ecology Progress Series 406 (2010) ISSN: 0171-8630 benthic community carbon-isotope ratios estuarine nematodes marginal ice-zone metazoan meiofauna organic-matter phytodetritus deposition seasonal variability southern-ocean weddell sea info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2010 ftunivwagenin https://doi.org/10.3354/meps08535 2024-01-10T23:22:43Z The present study explored the selective feeding properties of Antarctic and Arctic deep-sea nematodes within an experimental setup. Nematodes are assumed to play an important role in the carbon flux within the polar bathyal food webs, but knowledge about their natural diets is limited. For the first time, deep-sea multicore sediment samples from both polar regions were incubated aboard research vessels with either C-13-labelled bacteria or diatoms to determine whether the nematode community prefers freshly settled phytodetritus to a bacterial food source. The cores were collected at 2112 to 2400 m water depth and incubated onboard for 1, 3 and 6 d in the Arctic (Hausgarten) and for 1, 7 and 14 d in Antarctica (Kapp Norvegia). Natural carbon isotope signals of nematodes and organic sedimentary carbon showed a clear average offset (+3.2 parts per thousand). The contribution of bacteria to the diet of nematodes explained this C-13 offset and observed natural C-13 isotopic signatures. The nematodes showed a clear, relatively rapid (maximum at 6 to 7 d) and significant selective response to the pulse of C-13 enriched bacteria in surface sediments of both regions. This indicated that bacteria were preferred over fresh phytoplankton as a carbon source for both Arctic and Antarctic deep-sea nematode communities. The results also suggest that bacteria may provide a path through which unused detritus may enter the traditional metazoan food web by microbial reworking of organic matter. At the same time, uptake rates of nematode communities were minimal, which suggests the contribution of nematodes to benthic mineralisation of freshly deposited organic matter may be limited in deep polar seas. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Phytoplankton Southern Ocean Weddell Sea Wageningen UR (University & Research Centre): Digital Library Arctic Antarctic Southern Ocean Weddell Sea Weddell Marine Ecology Progress Series 406 121 133 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
benthic community carbon-isotope ratios estuarine nematodes marginal ice-zone metazoan meiofauna organic-matter phytodetritus deposition seasonal variability southern-ocean weddell sea |
spellingShingle |
benthic community carbon-isotope ratios estuarine nematodes marginal ice-zone metazoan meiofauna organic-matter phytodetritus deposition seasonal variability southern-ocean weddell sea Ingels, J. Van den Driessche, P. de Mesel, I.G. Vanhove, S. Moens, T. Vanreusel, A. Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
topic_facet |
benthic community carbon-isotope ratios estuarine nematodes marginal ice-zone metazoan meiofauna organic-matter phytodetritus deposition seasonal variability southern-ocean weddell sea |
description |
The present study explored the selective feeding properties of Antarctic and Arctic deep-sea nematodes within an experimental setup. Nematodes are assumed to play an important role in the carbon flux within the polar bathyal food webs, but knowledge about their natural diets is limited. For the first time, deep-sea multicore sediment samples from both polar regions were incubated aboard research vessels with either C-13-labelled bacteria or diatoms to determine whether the nematode community prefers freshly settled phytodetritus to a bacterial food source. The cores were collected at 2112 to 2400 m water depth and incubated onboard for 1, 3 and 6 d in the Arctic (Hausgarten) and for 1, 7 and 14 d in Antarctica (Kapp Norvegia). Natural carbon isotope signals of nematodes and organic sedimentary carbon showed a clear average offset (+3.2 parts per thousand). The contribution of bacteria to the diet of nematodes explained this C-13 offset and observed natural C-13 isotopic signatures. The nematodes showed a clear, relatively rapid (maximum at 6 to 7 d) and significant selective response to the pulse of C-13 enriched bacteria in surface sediments of both regions. This indicated that bacteria were preferred over fresh phytoplankton as a carbon source for both Arctic and Antarctic deep-sea nematode communities. The results also suggest that bacteria may provide a path through which unused detritus may enter the traditional metazoan food web by microbial reworking of organic matter. At the same time, uptake rates of nematode communities were minimal, which suggests the contribution of nematodes to benthic mineralisation of freshly deposited organic matter may be limited in deep polar seas. |
format |
Article in Journal/Newspaper |
author |
Ingels, J. Van den Driessche, P. de Mesel, I.G. Vanhove, S. Moens, T. Vanreusel, A. |
author_facet |
Ingels, J. Van den Driessche, P. de Mesel, I.G. Vanhove, S. Moens, T. Vanreusel, A. |
author_sort |
Ingels, J. |
title |
Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
title_short |
Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
title_full |
Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
title_fullStr |
Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
title_full_unstemmed |
Preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
title_sort |
preferred use of bacteria over phytoplankton by deep-sea nematodes in polar regions |
publishDate |
2010 |
url |
https://research.wur.nl/en/publications/preferred-use-of-bacteria-over-phytoplankton-by-deep-sea-nematode https://doi.org/10.3354/meps08535 |
geographic |
Arctic Antarctic Southern Ocean Weddell Sea Weddell |
geographic_facet |
Arctic Antarctic Southern Ocean Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctica Arctic Phytoplankton Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Arctic Phytoplankton Southern Ocean Weddell Sea |
op_source |
Marine Ecology Progress Series 406 (2010) ISSN: 0171-8630 |
op_relation |
https://edepot.wur.nl/174961 https://research.wur.nl/en/publications/preferred-use-of-bacteria-over-phytoplankton-by-deep-sea-nematode doi:10.3354/meps08535 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.3354/meps08535 |
container_title |
Marine Ecology Progress Series |
container_volume |
406 |
container_start_page |
121 |
op_container_end_page |
133 |
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1789974565587255296 |