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...
Published in: | Biogeosciences |
---|---|
Main Authors: | , , , , , , , |
Language: | English |
Published: |
2022
|
Subjects: | |
Online Access: | https://repository.publisso.de/resource/frl:6441229 https://doi.org/10.5194/bg-19-3897-2022 https://bg.copernicus.org/articles/19/3897/2022/bg-19-3897-2022-supplement.pdf |
id |
ftleibnizopen:oai:oai.leibnizopen.de:cHXbXIkBdbrxVwz6PHbo |
---|---|
record_format |
openpolar |
spelling |
ftleibnizopen:oai:oai.leibnizopen.de:cHXbXIkBdbrxVwz6PHbo 2023-07-30T04:00:17+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 https://repository.publisso.de/resource/frl:6441229 https://doi.org/10.5194/bg-19-3897-2022 https://bg.copernicus.org/articles/19/3897/2022/bg-19-3897-2022-supplement.pdf eng eng https://creativecommons.org/licenses/by/4.0/ Biogeosciences, 19(16):3897-3909 2022 ftleibnizopen https://doi.org/10.5194/bg-19-3897-2022 2023-07-16T23:32:11Z 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. Other/Unknown Material arctic methane Arctic Barents Sea Foraminifera* Storfjordrenna LeibnizOpen (The Leibniz Association) Arctic Barents Sea Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Biogeosciences 19 16 3897 3909 |
institution |
Open Polar |
collection |
LeibnizOpen (The Leibniz Association) |
op_collection_id |
ftleibnizopen |
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. |
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 |
publishDate |
2022 |
url |
https://repository.publisso.de/resource/frl:6441229 https://doi.org/10.5194/bg-19-3897-2022 https://bg.copernicus.org/articles/19/3897/2022/bg-19-3897-2022-supplement.pdf |
long_lat |
ENVELOPE(17.000,17.000,76.000,76.000) |
geographic |
Arctic Barents Sea Storfjordrenna |
geographic_facet |
Arctic Barents Sea Storfjordrenna |
genre |
arctic methane Arctic Barents Sea Foraminifera* Storfjordrenna |
genre_facet |
arctic methane Arctic Barents Sea Foraminifera* Storfjordrenna |
op_source |
Biogeosciences, 19(16):3897-3909 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
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 |
_version_ |
1772810796289490944 |