Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph
Several foraminifera are deposit feeders that consume organic detritus (dead particulate organic material with entrained bacteria). However, the role of such foraminifera in the benthic food web remains understudied. Foraminifera feeding on methanotrophic bacteria, which are 13C-depleted, may cause...
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Online Access: | https://hdl.handle.net/10037/26670 https://doi.org/10.5194/bg-19-3897-2022 |
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ftunivtroemsoe:oai:munin.uit.no:10037/26670 2023-05-15T14:26:56+02:00 Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph Schmidt, Christiane Geslin, Emmanuelle Bernhard, Joan M. LeKieffre, Charlotte Svenning, Mette Marianne Roberge, Helene Schweizer, Magali Panieri, Giuliana 2022-08-30 https://hdl.handle.net/10037/26670 https://doi.org/10.5194/bg-19-3897-2022 eng eng Copernicus Publications Biogeosciences Deutsche Forschungsgemeinschaft: 444059848 Norges forskningsråd: 223259 Norges forskningsråd: 255250 Schmidt C, Geslin E, Bernhard JM, LeKieffre C, Svenning MM, Roberge H, Schweizer M, Panieri G. Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph. Biogeosciences. 2022;19:3897-3909 FRIDAID 2047226 doi:10.5194/bg-19-3897-2022 1726-4170 1726-4189 https://hdl.handle.net/10037/26670 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.5194/bg-19-3897-2022 2022-09-07T23:00:14Z Several foraminifera are deposit feeders that consume organic detritus (dead particulate organic material with entrained bacteria). However, the role of such foraminifera in the benthic food web remains understudied. Foraminifera feeding on methanotrophic bacteria, which are 13C-depleted, may cause negative cytoplasmic and/or calcitic δ13C values. To test whether the foraminiferal diet includes methanotrophs, we performed a short-term (20 h) feeding experiment with Nonionellina labradorica from an active Arctic methane-emission site (Storfjordrenna, Barents Sea) using the marine methanotroph Methyloprofundus sedimenti and analysed N. labradorica cytology via transmission electron microscopy (TEM). We hypothesised that M. sedimenti would be visible post-experiment in degradation vacuoles, as evidenced by their ultrastructure. Sediment grains (mostly clay) occurred inside one or several degradation vacuoles in all foraminifers. In 24 % of the specimens from the feeding experiment degradation vacuoles also contained bacteria, although none could be confirmed to be the offered M. sedimenti. Observations of the apertural area after 20 h incubation revealed three putative methanotrophs, close to clay particles, based on bacterial ultrastructural characteristics. Furthermore, we noted the absence of bacterial endobionts in all examined N. labradorica but confirmed the presence of kleptoplasts, which were often partially degraded. In sum, we suggest that M. sedimenti can be consumed via untargeted grazing in seeps and that N. labradorica can be generally classified as a deposit feeder at this Arctic site Article in Journal/Newspaper Arctic arctic methane Arctic Barents Sea Foraminifera* Storfjordrenna University of Tromsø: Munin Open Research Archive Arctic Barents Sea Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Biogeosciences 19 16 3897 3909 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
Several foraminifera are deposit feeders that consume organic detritus (dead particulate organic material with entrained bacteria). However, the role of such foraminifera in the benthic food web remains understudied. Foraminifera feeding on methanotrophic bacteria, which are 13C-depleted, may cause negative cytoplasmic and/or calcitic δ13C values. To test whether the foraminiferal diet includes methanotrophs, we performed a short-term (20 h) feeding experiment with Nonionellina labradorica from an active Arctic methane-emission site (Storfjordrenna, Barents Sea) using the marine methanotroph Methyloprofundus sedimenti and analysed N. labradorica cytology via transmission electron microscopy (TEM). We hypothesised that M. sedimenti would be visible post-experiment in degradation vacuoles, as evidenced by their ultrastructure. Sediment grains (mostly clay) occurred inside one or several degradation vacuoles in all foraminifers. In 24 % of the specimens from the feeding experiment degradation vacuoles also contained bacteria, although none could be confirmed to be the offered M. sedimenti. Observations of the apertural area after 20 h incubation revealed three putative methanotrophs, close to clay particles, based on bacterial ultrastructural characteristics. Furthermore, we noted the absence of bacterial endobionts in all examined N. labradorica but confirmed the presence of kleptoplasts, which were often partially degraded. In sum, we suggest that M. sedimenti can be consumed via untargeted grazing in seeps and that N. labradorica can be generally classified as a deposit feeder at this Arctic site |
format |
Article in Journal/Newspaper |
author |
Schmidt, Christiane Geslin, Emmanuelle Bernhard, Joan M. LeKieffre, Charlotte Svenning, Mette Marianne Roberge, Helene Schweizer, Magali Panieri, Giuliana |
spellingShingle |
Schmidt, Christiane Geslin, Emmanuelle Bernhard, Joan M. LeKieffre, Charlotte Svenning, Mette Marianne Roberge, Helene Schweizer, Magali Panieri, Giuliana Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph |
author_facet |
Schmidt, Christiane Geslin, Emmanuelle Bernhard, Joan M. LeKieffre, Charlotte Svenning, Mette Marianne Roberge, Helene Schweizer, Magali Panieri, Giuliana |
author_sort |
Schmidt, Christiane |
title |
Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph |
title_short |
Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph |
title_full |
Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph |
title_fullStr |
Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph |
title_full_unstemmed |
Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph |
title_sort |
deposit-feeding of nonionellina labradorica (foraminifera) from an arctic methane seep site and possible association with a methanotroph |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/26670 https://doi.org/10.5194/bg-19-3897-2022 |
long_lat |
ENVELOPE(17.000,17.000,76.000,76.000) |
geographic |
Arctic Barents Sea Storfjordrenna |
geographic_facet |
Arctic Barents Sea Storfjordrenna |
genre |
Arctic arctic methane Arctic Barents Sea Foraminifera* Storfjordrenna |
genre_facet |
Arctic arctic methane Arctic Barents Sea Foraminifera* Storfjordrenna |
op_relation |
Biogeosciences Deutsche Forschungsgemeinschaft: 444059848 Norges forskningsråd: 223259 Norges forskningsråd: 255250 Schmidt C, Geslin E, Bernhard JM, LeKieffre C, Svenning MM, Roberge H, Schweizer M, Panieri G. Deposit-feeding of Nonionellina labradorica (foraminifera) from an Arctic methane seep site and possible association with a methanotroph. Biogeosciences. 2022;19:3897-3909 FRIDAID 2047226 doi:10.5194/bg-19-3897-2022 1726-4170 1726-4189 https://hdl.handle.net/10037/26670 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.5194/bg-19-3897-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
16 |
container_start_page |
3897 |
op_container_end_page |
3909 |
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1766300422549536768 |