Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts
The Southern Ocean is the largest high nutrient, low chlorophyll region in the global ocean and is subject to strong iron limitation. Iron availability is associated with the interaction between the Antarctic Circumpolar Current (ACC) and topographic features such as the Kerguelen Plateau in the Ind...
Published in: | Ecological Modelling |
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Language: | English |
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Online Access: | https://doi.org/10.1016/j.ecolmodel.2017.05.030 http://ecite.utas.edu.au/118820 |
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ftunivtasecite:oai:ecite.utas.edu.au:118820 2023-05-15T13:49:03+02:00 Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts Priester, CR Melbourne-Thomas, J Klocker, A Corney, S 2017 https://doi.org/10.1016/j.ecolmodel.2017.05.030 http://ecite.utas.edu.au/118820 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.ecolmodel.2017.05.030 Priester, CR and Melbourne-Thomas, J and Klocker, A and Corney, S, Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts, Ecological Modelling, 359 pp. 372-382. ISSN 0304-3800 (2017) [Refereed Article] http://ecite.utas.edu.au/118820 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1016/j.ecolmodel.2017.05.030 2019-12-13T22:18:03Z The Southern Ocean is the largest high nutrient, low chlorophyll region in the global ocean and is subject to strong iron limitation. Iron availability is associated with the interaction between the Antarctic Circumpolar Current (ACC) and topographic features such as the Kerguelen Plateau in the Indian Sector of the Southern Ocean. The fronts of the ACC also provide important environmental delineations for Southern Ocean ecosystem structure. Here, we implement a NPZD (nitrogen, phytoplankton, zooplankton, detritus) model together with an optimal control algorithm along three meridional transects across the Antarctic Circumpolar Current. Our study represents the first spatial application of this model, and considers potential environmental drivers of parameter variability and community dynamics. In iron-limited open ocean regions, this model captures seasonal processes well but does not converge in more complex regions, such as the iron fertilized Kerguelen Plateau and sea ice areas. All variables show marked meridional changes, which are likely associated with the fronts of the Antarctic Circumpolar Current. This technique indicates that the different bodies of water associated with the circumpolar current exhibit different ecosystem dynamics, a result that is likely caused by distinct NPZD communities. Overall, our findings contribute to broadscale understanding of the drivers of lower trophic level ecosystem dynamics across physical boundaries in the Indian Sector of the Southern Ocean, and can be used to help guide further modelling efforts. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic Indian Kerguelen Southern Ocean The Antarctic Ecological Modelling 359 372 382 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Priester, CR Melbourne-Thomas, J Klocker, A Corney, S Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
The Southern Ocean is the largest high nutrient, low chlorophyll region in the global ocean and is subject to strong iron limitation. Iron availability is associated with the interaction between the Antarctic Circumpolar Current (ACC) and topographic features such as the Kerguelen Plateau in the Indian Sector of the Southern Ocean. The fronts of the ACC also provide important environmental delineations for Southern Ocean ecosystem structure. Here, we implement a NPZD (nitrogen, phytoplankton, zooplankton, detritus) model together with an optimal control algorithm along three meridional transects across the Antarctic Circumpolar Current. Our study represents the first spatial application of this model, and considers potential environmental drivers of parameter variability and community dynamics. In iron-limited open ocean regions, this model captures seasonal processes well but does not converge in more complex regions, such as the iron fertilized Kerguelen Plateau and sea ice areas. All variables show marked meridional changes, which are likely associated with the fronts of the Antarctic Circumpolar Current. This technique indicates that the different bodies of water associated with the circumpolar current exhibit different ecosystem dynamics, a result that is likely caused by distinct NPZD communities. Overall, our findings contribute to broadscale understanding of the drivers of lower trophic level ecosystem dynamics across physical boundaries in the Indian Sector of the Southern Ocean, and can be used to help guide further modelling efforts. |
format |
Article in Journal/Newspaper |
author |
Priester, CR Melbourne-Thomas, J Klocker, A Corney, S |
author_facet |
Priester, CR Melbourne-Thomas, J Klocker, A Corney, S |
author_sort |
Priester, CR |
title |
Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts |
title_short |
Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts |
title_full |
Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts |
title_fullStr |
Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts |
title_full_unstemmed |
Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts |
title_sort |
abrupt transitions in dynamics of a npzd model across southern ocean fronts |
publisher |
Elsevier Science Bv |
publishDate |
2017 |
url |
https://doi.org/10.1016/j.ecolmodel.2017.05.030 http://ecite.utas.edu.au/118820 |
geographic |
Antarctic Indian Kerguelen Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Kerguelen Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
http://dx.doi.org/10.1016/j.ecolmodel.2017.05.030 Priester, CR and Melbourne-Thomas, J and Klocker, A and Corney, S, Abrupt transitions in dynamics of a NPZD model across Southern Ocean fronts, Ecological Modelling, 359 pp. 372-382. ISSN 0304-3800 (2017) [Refereed Article] http://ecite.utas.edu.au/118820 |
op_doi |
https://doi.org/10.1016/j.ecolmodel.2017.05.030 |
container_title |
Ecological Modelling |
container_volume |
359 |
container_start_page |
372 |
op_container_end_page |
382 |
_version_ |
1766250711143677952 |