Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures
The carbon (C) budget in bathyal permanently cold sediments was assessed by means of a pulse-chase experiment in the deep Faroe-Shetland Channel (FSC). The food pulse was simulated by adding 500 mg C m(-2) of the C-13-labelled marine diatom Chaetoceros radicans to sediment cores retrieved from 1080...
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2011
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Online Access: | https://pure.uhi.ac.uk/en/publications/0893c39a-e3c1-4cab-9a5e-5096efc6b76f https://doi.org/10.3354/meps08892 |
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ftuhipublicatio:oai:pure.atira.dk:publications/0893c39a-e3c1-4cab-9a5e-5096efc6b76f 2024-02-04T09:58:37+01:00 Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures Gontikaki, Evangelia Mayor, D J Thornton, B Black, Kenny Witte, Ursula 2011 https://pure.uhi.ac.uk/en/publications/0893c39a-e3c1-4cab-9a5e-5096efc6b76f https://doi.org/10.3354/meps08892 eng eng info:eu-repo/semantics/restrictedAccess Gontikaki , E , Mayor , D J , Thornton , B , Black , K & Witte , U 2011 , ' Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures ' , MAR ECOL-PROG SER , vol. 421 , no. 1 , n/a , pp. 39-50 . https://doi.org/10.3354/meps08892 GROWTH EFFICIENCY GOBAN SPUR SHORT-TERM FATE Marine & Freshwater Biology BENTHIC RESPONSE ORGANIC-MATTER Oceanography NORTHEAST ATLANTIC Ecology ARCTIC SEDIMENTS DEEP-SEA SEDIMENTS FORAMINIFERAL POPULATIONS IN-SITU EXPERIMENTS article 2011 ftuhipublicatio https://doi.org/10.3354/meps08892 2024-01-11T23:20:59Z The carbon (C) budget in bathyal permanently cold sediments was assessed by means of a pulse-chase experiment in the deep Faroe-Shetland Channel (FSC). The food pulse was simulated by adding 500 mg C m(-2) of the C-13-labelled marine diatom Chaetoceros radicans to sediment cores retrieved from 1080 m in the FSC. The fate of the tracer was followed over 6 d into the dissolved inorganic C pool ((DIC)-C-13) as well as the bacterial and faunal (metazoan macrofauna and meiofaunal-sized nematode) biomass. After 3 d of incubation, 14.9 and 0.81 mg C m(-2) of the algal C was recovered from bacterial and faunal biomass, respectively, while only 3.8 mg C m(-2) was respired. Respiration was the dominant tracer pathway after 6 d of incubation (44 mg C m(-2)). Bacterial tracer uptake did not increase significantly between Days 3 and 6. The tracer recovered from metazoan fauna at the end of the experiment constituted 3.2% (2 mg C m(-2)) of the total processed C, with meiofauna contributing only similar to 1% to the total metazoan uptake. The bacterial response was characterised by varying bacterial growth efficiency (BGE). During the first half of the experiment, low respiration and high bacterial uptake of the C-13-labelled substrate resulted in particularly high BGE, while the opposite was observed in the second half of the incubation. We postulate that the high BGE at the start of the experiment represents the absorption and metabolism of the readily available labile components of the added organic matter (OM). The decrease in BGE possibly corresponds to the initiation of the energetically costly hydrolytic processes necessary for the consumption of more recalcitrant OM. Article in Journal/Newspaper Arctic Foraminifera* Northeast Atlantic University of the Highlands and Islands: Research Database of UHI Arctic Marine Ecology Progress Series 421 39 50 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
GROWTH EFFICIENCY GOBAN SPUR SHORT-TERM FATE Marine & Freshwater Biology BENTHIC RESPONSE ORGANIC-MATTER Oceanography NORTHEAST ATLANTIC Ecology ARCTIC SEDIMENTS DEEP-SEA SEDIMENTS FORAMINIFERAL POPULATIONS IN-SITU EXPERIMENTS |
spellingShingle |
GROWTH EFFICIENCY GOBAN SPUR SHORT-TERM FATE Marine & Freshwater Biology BENTHIC RESPONSE ORGANIC-MATTER Oceanography NORTHEAST ATLANTIC Ecology ARCTIC SEDIMENTS DEEP-SEA SEDIMENTS FORAMINIFERAL POPULATIONS IN-SITU EXPERIMENTS Gontikaki, Evangelia Mayor, D J Thornton, B Black, Kenny Witte, Ursula Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures |
topic_facet |
GROWTH EFFICIENCY GOBAN SPUR SHORT-TERM FATE Marine & Freshwater Biology BENTHIC RESPONSE ORGANIC-MATTER Oceanography NORTHEAST ATLANTIC Ecology ARCTIC SEDIMENTS DEEP-SEA SEDIMENTS FORAMINIFERAL POPULATIONS IN-SITU EXPERIMENTS |
description |
The carbon (C) budget in bathyal permanently cold sediments was assessed by means of a pulse-chase experiment in the deep Faroe-Shetland Channel (FSC). The food pulse was simulated by adding 500 mg C m(-2) of the C-13-labelled marine diatom Chaetoceros radicans to sediment cores retrieved from 1080 m in the FSC. The fate of the tracer was followed over 6 d into the dissolved inorganic C pool ((DIC)-C-13) as well as the bacterial and faunal (metazoan macrofauna and meiofaunal-sized nematode) biomass. After 3 d of incubation, 14.9 and 0.81 mg C m(-2) of the algal C was recovered from bacterial and faunal biomass, respectively, while only 3.8 mg C m(-2) was respired. Respiration was the dominant tracer pathway after 6 d of incubation (44 mg C m(-2)). Bacterial tracer uptake did not increase significantly between Days 3 and 6. The tracer recovered from metazoan fauna at the end of the experiment constituted 3.2% (2 mg C m(-2)) of the total processed C, with meiofauna contributing only similar to 1% to the total metazoan uptake. The bacterial response was characterised by varying bacterial growth efficiency (BGE). During the first half of the experiment, low respiration and high bacterial uptake of the C-13-labelled substrate resulted in particularly high BGE, while the opposite was observed in the second half of the incubation. We postulate that the high BGE at the start of the experiment represents the absorption and metabolism of the readily available labile components of the added organic matter (OM). The decrease in BGE possibly corresponds to the initiation of the energetically costly hydrolytic processes necessary for the consumption of more recalcitrant OM. |
format |
Article in Journal/Newspaper |
author |
Gontikaki, Evangelia Mayor, D J Thornton, B Black, Kenny Witte, Ursula |
author_facet |
Gontikaki, Evangelia Mayor, D J Thornton, B Black, Kenny Witte, Ursula |
author_sort |
Gontikaki, Evangelia |
title |
Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures |
title_short |
Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures |
title_full |
Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures |
title_fullStr |
Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures |
title_full_unstemmed |
Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures |
title_sort |
processing of c-13-labelled diatoms by a bathyal community at sub-zero temperatures |
publishDate |
2011 |
url |
https://pure.uhi.ac.uk/en/publications/0893c39a-e3c1-4cab-9a5e-5096efc6b76f https://doi.org/10.3354/meps08892 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* Northeast Atlantic |
genre_facet |
Arctic Foraminifera* Northeast Atlantic |
op_source |
Gontikaki , E , Mayor , D J , Thornton , B , Black , K & Witte , U 2011 , ' Processing of C-13-labelled diatoms by a bathyal community at sub-zero temperatures ' , MAR ECOL-PROG SER , vol. 421 , no. 1 , n/a , pp. 39-50 . https://doi.org/10.3354/meps08892 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3354/meps08892 |
container_title |
Marine Ecology Progress Series |
container_volume |
421 |
container_start_page |
39 |
op_container_end_page |
50 |
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1789963075026157568 |