Incorporating Phaeocystis into a Southern Ocean ecosystem model
Phaeocystis antarctica is an important phytoplankton species in the Southern Ocean. We incorporated P. antarctica into the biogeochemical elemental cycling ocean model to study Southern Ocean ecosystem dynamics and biogeochemistry. The optimum values of ecological parameters for Phaeocystis were sou...
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ftcdlib:qt8k2076kk 2023-05-15T13:52:22+02:00 Incorporating Phaeocystis into a Southern Ocean ecosystem model Wang, Shanlin Moore, J. Keith 2011-01-28 application/pdf http://www.escholarship.org/uc/item/8k2076kk english eng eScholarship, University of California qt8k2076kk http://www.escholarship.org/uc/item/8k2076kk Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Wang, Shanlin; & Moore, J. Keith. (2011). Incorporating Phaeocystis into a Southern Ocean ecosystem model. Journal of Geophysical Research, 116(C1). doi:10.1029/2009JC005817. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/8k2076kk Physical Sciences and Mathematics phytoplankton assemblage composition ross-sea antarctica prymnesiophyceae global ocean north-sea iron carbon blooms light co2 article 2011 ftcdlib https://doi.org/10.1029/2009JC005817 2016-04-02T18:54:30Z Phaeocystis antarctica is an important phytoplankton species in the Southern Ocean. We incorporated P. antarctica into the biogeochemical elemental cycling ocean model to study Southern Ocean ecosystem dynamics and biogeochemistry. The optimum values of ecological parameters for Phaeocystis were sought through synthesizing laboratory and field observations, and the model output was evaluated with observed chlorophyll a, carbon biomass, and nutrient distributions. Several factors have been proposed to control Southern Ocean ecosystem structure, including light adaptation, iron uptake capability, and loss processes. Optimum simulation results were obtained when P. antarctica had a relatively high α (P-I curve initial slope) value and a higher half-saturation constant for iron uptake than other phytoplankton. Simulation results suggested that P. antarctica had a competitive advantage under low irradiance levels, especially in the Ross Sea and Weddell Sea. However, the distributions of P. antarctica and diatoms were also strongly influenced by iron availability. Although grazing rates had an influence on total biomass, our simulations did not show a strong influence of grazing pressure in the competition between P. antarctica and diatoms. However, limited observations and the relative simplicity of zooplankton in our model suggest further research is needed. Overall, P. antarctica contributed ∼13% of annual primary production and ∼19% of sinking carbon export in the Southern Ocean (>40°S) in our best case simulation. At higher latitudes (>60°S) P. antarctica accounts for ∼23% of annual primary production and ∼30% of sinking carbon export. Article in Journal/Newspaper Antarc* Antarctica Ross Sea Southern Ocean Weddell Sea University of California: eScholarship Ross Sea Southern Ocean Weddell Weddell Sea Journal of Geophysical Research 116 C1 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics phytoplankton assemblage composition ross-sea antarctica prymnesiophyceae global ocean north-sea iron carbon blooms light co2 |
spellingShingle |
Physical Sciences and Mathematics phytoplankton assemblage composition ross-sea antarctica prymnesiophyceae global ocean north-sea iron carbon blooms light co2 Wang, Shanlin Moore, J. Keith Incorporating Phaeocystis into a Southern Ocean ecosystem model |
topic_facet |
Physical Sciences and Mathematics phytoplankton assemblage composition ross-sea antarctica prymnesiophyceae global ocean north-sea iron carbon blooms light co2 |
description |
Phaeocystis antarctica is an important phytoplankton species in the Southern Ocean. We incorporated P. antarctica into the biogeochemical elemental cycling ocean model to study Southern Ocean ecosystem dynamics and biogeochemistry. The optimum values of ecological parameters for Phaeocystis were sought through synthesizing laboratory and field observations, and the model output was evaluated with observed chlorophyll a, carbon biomass, and nutrient distributions. Several factors have been proposed to control Southern Ocean ecosystem structure, including light adaptation, iron uptake capability, and loss processes. Optimum simulation results were obtained when P. antarctica had a relatively high α (P-I curve initial slope) value and a higher half-saturation constant for iron uptake than other phytoplankton. Simulation results suggested that P. antarctica had a competitive advantage under low irradiance levels, especially in the Ross Sea and Weddell Sea. However, the distributions of P. antarctica and diatoms were also strongly influenced by iron availability. Although grazing rates had an influence on total biomass, our simulations did not show a strong influence of grazing pressure in the competition between P. antarctica and diatoms. However, limited observations and the relative simplicity of zooplankton in our model suggest further research is needed. Overall, P. antarctica contributed ∼13% of annual primary production and ∼19% of sinking carbon export in the Southern Ocean (>40°S) in our best case simulation. At higher latitudes (>60°S) P. antarctica accounts for ∼23% of annual primary production and ∼30% of sinking carbon export. |
format |
Article in Journal/Newspaper |
author |
Wang, Shanlin Moore, J. Keith |
author_facet |
Wang, Shanlin Moore, J. Keith |
author_sort |
Wang, Shanlin |
title |
Incorporating Phaeocystis into a Southern Ocean ecosystem model |
title_short |
Incorporating Phaeocystis into a Southern Ocean ecosystem model |
title_full |
Incorporating Phaeocystis into a Southern Ocean ecosystem model |
title_fullStr |
Incorporating Phaeocystis into a Southern Ocean ecosystem model |
title_full_unstemmed |
Incorporating Phaeocystis into a Southern Ocean ecosystem model |
title_sort |
incorporating phaeocystis into a southern ocean ecosystem model |
publisher |
eScholarship, University of California |
publishDate |
2011 |
url |
http://www.escholarship.org/uc/item/8k2076kk |
geographic |
Ross Sea Southern Ocean Weddell Weddell Sea |
geographic_facet |
Ross Sea Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctica Ross Sea Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctica Ross Sea Southern Ocean Weddell Sea |
op_source |
Wang, Shanlin; & Moore, J. Keith. (2011). Incorporating Phaeocystis into a Southern Ocean ecosystem model. Journal of Geophysical Research, 116(C1). doi:10.1029/2009JC005817. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/8k2076kk |
op_relation |
qt8k2076kk http://www.escholarship.org/uc/item/8k2076kk |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2009JC005817 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
C1 |
_version_ |
1766256650994319360 |