Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model
A minimum mathematical model of the marine pelagic microbial food web has previously shown to be able to reproduce central aspects of observed system response to different bottom-up manipulations in a mesocosm experiment Microbial Ecosystem Dynamics (MEDEA) in Danish waters. In this study, we apply...
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ftunivbergen:oai:bora.uib.no:1956/11853 2023-05-15T14:47:05+02:00 Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model Larsen, Aud Egge, Jorun Karin Nejstgaard, Jens Christian Di Capua, Iole Thyrhaug, Runar Bratbak, Gunnar Thingstad, Tron Frede 2016-02-04T12:16:26Z application/pdf https://hdl.handle.net/1956/11853 https://doi.org/10.1002/lno.10025 eng eng Wiley urn:issn:0024-3590 https://hdl.handle.net/1956/11853 https://doi.org/10.1002/lno.10025 cristin:1321218 Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/3.0/ Copyright 2015 the authors Peer reviewed Journal article 2016 ftunivbergen https://doi.org/10.1002/lno.10025 2023-03-14T17:38:55Z A minimum mathematical model of the marine pelagic microbial food web has previously shown to be able to reproduce central aspects of observed system response to different bottom-up manipulations in a mesocosm experiment Microbial Ecosystem Dynamics (MEDEA) in Danish waters. In this study, we apply this model to two mesocosm experiments (Polar Aquatic Microbial Ecology (PAME)-I and PAME-II) conducted at the Arctic location Kongsfjorden, Svalbard. The different responses of the microbial community to similar nutrient manipulation in the three mesocosm experiments may be described as diatom-dominated (MEDEA), bacteria-dominated (PAME-I), and flagellated-dominated (PAME-II). When allowing ciliates to be able to feed on small diatoms, the model describing the diatom-dominated MEDEA experiment give a bacteria-dominated response as observed in PAME I in which the diatom community comprised almost exclusively small-sized cells. Introducing a high initial mesozooplankton stock as observed in PAME-II, the model gives a flagellate-dominated response in accordance with the observed response also of this experiment. The ability of the model originally developed for temperate waters to reproduce population dynamics in a 10°C colder Arctic fjord, does not support the existence of important shifts in population balances over this temperature range. Rather, it suggests a quite resilient microbial food web when adapted to in situ temperature. The sensitivity of the model response to its mesozooplankton component suggests, however, that the seasonal vertical migration of Arctic copepods may be a strong forcing factor on Arctic microbial food webs. publishedVersion Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Mesozooplankton PAME Svalbard Copepods University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Svalbard Limnology and Oceanography 60 2 360 374 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
A minimum mathematical model of the marine pelagic microbial food web has previously shown to be able to reproduce central aspects of observed system response to different bottom-up manipulations in a mesocosm experiment Microbial Ecosystem Dynamics (MEDEA) in Danish waters. In this study, we apply this model to two mesocosm experiments (Polar Aquatic Microbial Ecology (PAME)-I and PAME-II) conducted at the Arctic location Kongsfjorden, Svalbard. The different responses of the microbial community to similar nutrient manipulation in the three mesocosm experiments may be described as diatom-dominated (MEDEA), bacteria-dominated (PAME-I), and flagellated-dominated (PAME-II). When allowing ciliates to be able to feed on small diatoms, the model describing the diatom-dominated MEDEA experiment give a bacteria-dominated response as observed in PAME I in which the diatom community comprised almost exclusively small-sized cells. Introducing a high initial mesozooplankton stock as observed in PAME-II, the model gives a flagellate-dominated response in accordance with the observed response also of this experiment. The ability of the model originally developed for temperate waters to reproduce population dynamics in a 10°C colder Arctic fjord, does not support the existence of important shifts in population balances over this temperature range. Rather, it suggests a quite resilient microbial food web when adapted to in situ temperature. The sensitivity of the model response to its mesozooplankton component suggests, however, that the seasonal vertical migration of Arctic copepods may be a strong forcing factor on Arctic microbial food webs. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Larsen, Aud Egge, Jorun Karin Nejstgaard, Jens Christian Di Capua, Iole Thyrhaug, Runar Bratbak, Gunnar Thingstad, Tron Frede |
spellingShingle |
Larsen, Aud Egge, Jorun Karin Nejstgaard, Jens Christian Di Capua, Iole Thyrhaug, Runar Bratbak, Gunnar Thingstad, Tron Frede Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model |
author_facet |
Larsen, Aud Egge, Jorun Karin Nejstgaard, Jens Christian Di Capua, Iole Thyrhaug, Runar Bratbak, Gunnar Thingstad, Tron Frede |
author_sort |
Larsen, Aud |
title |
Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model |
title_short |
Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model |
title_full |
Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model |
title_fullStr |
Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model |
title_full_unstemmed |
Contrasting response to nutrient manipulation in Arctic mesocosms are reproduced by a minimum microbial food web model |
title_sort |
contrasting response to nutrient manipulation in arctic mesocosms are reproduced by a minimum microbial food web model |
publisher |
Wiley |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/11853 https://doi.org/10.1002/lno.10025 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Kongsfjord* Kongsfjorden Mesozooplankton PAME Svalbard Copepods |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Mesozooplankton PAME Svalbard Copepods |
op_relation |
urn:issn:0024-3590 https://hdl.handle.net/1956/11853 https://doi.org/10.1002/lno.10025 cristin:1321218 |
op_rights |
Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/3.0/ Copyright 2015 the authors |
op_doi |
https://doi.org/10.1002/lno.10025 |
container_title |
Limnology and Oceanography |
container_volume |
60 |
container_issue |
2 |
container_start_page |
360 |
op_container_end_page |
374 |
_version_ |
1766318218773790720 |