Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach
Modelling the development of soils in glacier forefields is necessary in order to assess how microbial and geochemical processes interact and shape soil development in response to glacier retreat. Furthermore, such models can help us predict microbial growth and the fate of Arctic soils in an increa...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2016
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Online Access: | https://hdl.handle.net/1983/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff https://research-information.bris.ac.uk/en/publications/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff https://doi.org/10.5194/bg-13-5677-2016 https://research-information.bris.ac.uk/ws/files/89328981/bg_13_5677_2016.pdf https://research-information.bris.ac.uk/ws/files/89328983/bg_13_5677_2016_supplement.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff 2024-04-28T08:04:31+00:00 Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach Bradley, James Arndt, Sandra Sabacka, Marie Benning, LG Barker, Gary Blacker, Joshua Yallop, Marian Wright, Katherine Bellas, Christopher Telling, Jon Tranter, Martyn Anesio, Alexandre 2016-10 application/pdf https://hdl.handle.net/1983/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff https://research-information.bris.ac.uk/en/publications/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff https://doi.org/10.5194/bg-13-5677-2016 https://research-information.bris.ac.uk/ws/files/89328981/bg_13_5677_2016.pdf https://research-information.bris.ac.uk/ws/files/89328983/bg_13_5677_2016_supplement.pdf eng eng https://research-information.bris.ac.uk/en/publications/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff info:eu-repo/semantics/openAccess Bradley , J , Arndt , S , Sabacka , M , Benning , LG , Barker , G , Blacker , J , Yallop , M , Wright , K , Bellas , C , Telling , J , Tranter , M & Anesio , A 2016 , ' Microbial dynamics in a High Arctic glacier forefield : a combined field, laboratory, and modelling approach ' , Biogeosciences , vol. 13 , no. 19 , pp. 5677-5696 . https://doi.org/10.5194/bg-13-5677-2016 article 2016 ftubristolcris https://doi.org/10.5194/bg-13-5677-2016 2024-04-03T15:37:05Z Modelling the development of soils in glacier forefields is necessary in order to assess how microbial and geochemical processes interact and shape soil development in response to glacier retreat. Furthermore, such models can help us predict microbial growth and the fate of Arctic soils in an increasingly ice-free future. Here, for the first time, we combined field sampling with laboratory analyses and numerical modelling to investigate microbial community dynamics in oligotrophic proglacial soils in Svalbard. We measured low bacterial growth rates and growth efficiencies (relative to estimates from Alpine glacier forefields) and high sensitivity of bacterial growth rates to soil temperature (relative to temperate soils). We used these laboratory measurements to inform parameter values in a new numerical model and significantly refined predictions of microbial and biogeochemical dynamics of soil development over a period of roughly 120 years. The model predicted the observed accumulation of autotrophic and heterotrophic biomass. Genomic data indicated that initial microbial communities were dominated by bacteria derived from the glacial environment, whereas older soils hosted a mixed community of autotrophic and heterotrophic bacteria. This finding was simulated by the numerical model, which showed that active microbial communities play key roles in fixing and recycling carbon and nutrients. We also demonstrated the role of allochthonous carbon and microbial necromass in sustaining a pool of organic material, despite high heterotrophic activity in older soils. This combined field, laboratory, and modelling approach demonstrates the value of integrated model–data studies to understand and quantify the functioning of the microbial community in an emerging High Arctic soil ecosystem. Article in Journal/Newspaper Arctic Arctic glacier Svalbard University of Bristol: Bristol Research Biogeosciences 13 19 5677 5696 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
Modelling the development of soils in glacier forefields is necessary in order to assess how microbial and geochemical processes interact and shape soil development in response to glacier retreat. Furthermore, such models can help us predict microbial growth and the fate of Arctic soils in an increasingly ice-free future. Here, for the first time, we combined field sampling with laboratory analyses and numerical modelling to investigate microbial community dynamics in oligotrophic proglacial soils in Svalbard. We measured low bacterial growth rates and growth efficiencies (relative to estimates from Alpine glacier forefields) and high sensitivity of bacterial growth rates to soil temperature (relative to temperate soils). We used these laboratory measurements to inform parameter values in a new numerical model and significantly refined predictions of microbial and biogeochemical dynamics of soil development over a period of roughly 120 years. The model predicted the observed accumulation of autotrophic and heterotrophic biomass. Genomic data indicated that initial microbial communities were dominated by bacteria derived from the glacial environment, whereas older soils hosted a mixed community of autotrophic and heterotrophic bacteria. This finding was simulated by the numerical model, which showed that active microbial communities play key roles in fixing and recycling carbon and nutrients. We also demonstrated the role of allochthonous carbon and microbial necromass in sustaining a pool of organic material, despite high heterotrophic activity in older soils. This combined field, laboratory, and modelling approach demonstrates the value of integrated model–data studies to understand and quantify the functioning of the microbial community in an emerging High Arctic soil ecosystem. |
format |
Article in Journal/Newspaper |
author |
Bradley, James Arndt, Sandra Sabacka, Marie Benning, LG Barker, Gary Blacker, Joshua Yallop, Marian Wright, Katherine Bellas, Christopher Telling, Jon Tranter, Martyn Anesio, Alexandre |
spellingShingle |
Bradley, James Arndt, Sandra Sabacka, Marie Benning, LG Barker, Gary Blacker, Joshua Yallop, Marian Wright, Katherine Bellas, Christopher Telling, Jon Tranter, Martyn Anesio, Alexandre Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach |
author_facet |
Bradley, James Arndt, Sandra Sabacka, Marie Benning, LG Barker, Gary Blacker, Joshua Yallop, Marian Wright, Katherine Bellas, Christopher Telling, Jon Tranter, Martyn Anesio, Alexandre |
author_sort |
Bradley, James |
title |
Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach |
title_short |
Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach |
title_full |
Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach |
title_fullStr |
Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach |
title_full_unstemmed |
Microbial dynamics in a High Arctic glacier forefield:a combined field, laboratory, and modelling approach |
title_sort |
microbial dynamics in a high arctic glacier forefield:a combined field, laboratory, and modelling approach |
publishDate |
2016 |
url |
https://hdl.handle.net/1983/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff https://research-information.bris.ac.uk/en/publications/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff https://doi.org/10.5194/bg-13-5677-2016 https://research-information.bris.ac.uk/ws/files/89328981/bg_13_5677_2016.pdf https://research-information.bris.ac.uk/ws/files/89328983/bg_13_5677_2016_supplement.pdf |
genre |
Arctic Arctic glacier Svalbard |
genre_facet |
Arctic Arctic glacier Svalbard |
op_source |
Bradley , J , Arndt , S , Sabacka , M , Benning , LG , Barker , G , Blacker , J , Yallop , M , Wright , K , Bellas , C , Telling , J , Tranter , M & Anesio , A 2016 , ' Microbial dynamics in a High Arctic glacier forefield : a combined field, laboratory, and modelling approach ' , Biogeosciences , vol. 13 , no. 19 , pp. 5677-5696 . https://doi.org/10.5194/bg-13-5677-2016 |
op_relation |
https://research-information.bris.ac.uk/en/publications/05e1a58f-fcf2-48a4-97a6-b2d9089ed8ff |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-13-5677-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
19 |
container_start_page |
5677 |
op_container_end_page |
5696 |
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1797575138001027072 |