Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages
© 2009 The Authors. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 6 (2009): 3131-3147, doi:10.5194/bg-6-3131-2009 Iron availability and temperature are important limiting factors for the biota in ma...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3127 2023-05-15T13:53:14+02:00 Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages Rose, J. M. Feng, Y. DiTullio, Giacomo R. Dunbar, Robert B. Hare, C. E. Lee, Peter A. Lohan, Maeve C. Long, Matthew C. Smith, Walker O. Sohst, Bettina M. Tozzi, S. Zhang, Y. Hutchins, David A. 2009-12-21 application/pdf https://hdl.handle.net/1912/3127 en eng Copernicus Publications on behalf of the European Geosciences Union https://doi.org/10.5194/bg-6-3131-2009 Biogeosciences 6 (2009): 3131-3147 https://hdl.handle.net/1912/3127 doi:10.5194/bg-6-3131-2009 Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ CC-BY Biogeosciences 6 (2009): 3131-3147 doi:10.5194/bg-6-3131-2009 Article 2009 ftwhoas https://doi.org/10.5194/bg-6-3131-2009 2022-05-28T22:57:51Z © 2009 The Authors. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 6 (2009): 3131-3147, doi:10.5194/bg-6-3131-2009 Iron availability and temperature are important limiting factors for the biota in many areas of the world ocean, and both have been predicted to change in future climate scenarios. However, the impacts of combined changes in these two key factors on microbial trophic dynamics and nutrient cycling are unknown. We examined the relative effects of iron addition (+1 nM) and increased temperature (+4°C) on plankton assemblages of the Ross Sea, Antarctica, a region characterized by annual algal blooms and an active microbial community. Increased iron and temperature individually had consistently significant but relatively minor positive effects on total phytoplankton abundance, phytoplankton and microzooplankton community composition, as well as photosynthetic parameters and nutrient drawdown. Unexpectedly, increased iron had a consistently negative impact on microzooplankton abundance, most likely a secondary response to changes in phytoplankton community composition. When iron and temperature were increased in concert, the resulting interactive effects were greatly magnified. This synergy between iron and temperature increases would not have been predictable by examining the effects of each variable individually. Our results suggest the possibility that if iron availability increases under future climate regimes, the impacts of predicted temperature increases on plankton assemblages in polar regions could be significantly enhanced. Such synergistic and antagonistic interactions between individual climate change variables highlight the importance of multivariate studies for marine global change experiments. This project was supported by US NSF grants ANT 0528715 to JMR, ANT 0741411, ANT 0741428 and OCE 0825319 to DAH, ANT 0338157 to WOS, ANT 0338097 to GRD, and ANT 0338350 to RBD. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Ross Sea Biogeosciences 6 12 3131 3147 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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English |
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© 2009 The Authors. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 6 (2009): 3131-3147, doi:10.5194/bg-6-3131-2009 Iron availability and temperature are important limiting factors for the biota in many areas of the world ocean, and both have been predicted to change in future climate scenarios. However, the impacts of combined changes in these two key factors on microbial trophic dynamics and nutrient cycling are unknown. We examined the relative effects of iron addition (+1 nM) and increased temperature (+4°C) on plankton assemblages of the Ross Sea, Antarctica, a region characterized by annual algal blooms and an active microbial community. Increased iron and temperature individually had consistently significant but relatively minor positive effects on total phytoplankton abundance, phytoplankton and microzooplankton community composition, as well as photosynthetic parameters and nutrient drawdown. Unexpectedly, increased iron had a consistently negative impact on microzooplankton abundance, most likely a secondary response to changes in phytoplankton community composition. When iron and temperature were increased in concert, the resulting interactive effects were greatly magnified. This synergy between iron and temperature increases would not have been predictable by examining the effects of each variable individually. Our results suggest the possibility that if iron availability increases under future climate regimes, the impacts of predicted temperature increases on plankton assemblages in polar regions could be significantly enhanced. Such synergistic and antagonistic interactions between individual climate change variables highlight the importance of multivariate studies for marine global change experiments. This project was supported by US NSF grants ANT 0528715 to JMR, ANT 0741411, ANT 0741428 and OCE 0825319 to DAH, ANT 0338157 to WOS, ANT 0338097 to GRD, and ANT 0338350 to RBD. |
format |
Article in Journal/Newspaper |
author |
Rose, J. M. Feng, Y. DiTullio, Giacomo R. Dunbar, Robert B. Hare, C. E. Lee, Peter A. Lohan, Maeve C. Long, Matthew C. Smith, Walker O. Sohst, Bettina M. Tozzi, S. Zhang, Y. Hutchins, David A. |
spellingShingle |
Rose, J. M. Feng, Y. DiTullio, Giacomo R. Dunbar, Robert B. Hare, C. E. Lee, Peter A. Lohan, Maeve C. Long, Matthew C. Smith, Walker O. Sohst, Bettina M. Tozzi, S. Zhang, Y. Hutchins, David A. Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages |
author_facet |
Rose, J. M. Feng, Y. DiTullio, Giacomo R. Dunbar, Robert B. Hare, C. E. Lee, Peter A. Lohan, Maeve C. Long, Matthew C. Smith, Walker O. Sohst, Bettina M. Tozzi, S. Zhang, Y. Hutchins, David A. |
author_sort |
Rose, J. M. |
title |
Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages |
title_short |
Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages |
title_full |
Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages |
title_fullStr |
Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages |
title_full_unstemmed |
Synergistic effects of iron and temperature on Antarctic phytoplankton and microzooplankton assemblages |
title_sort |
synergistic effects of iron and temperature on antarctic phytoplankton and microzooplankton assemblages |
publisher |
Copernicus Publications on behalf of the European Geosciences Union |
publishDate |
2009 |
url |
https://hdl.handle.net/1912/3127 |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea |
op_source |
Biogeosciences 6 (2009): 3131-3147 doi:10.5194/bg-6-3131-2009 |
op_relation |
https://doi.org/10.5194/bg-6-3131-2009 Biogeosciences 6 (2009): 3131-3147 https://hdl.handle.net/1912/3127 doi:10.5194/bg-6-3131-2009 |
op_rights |
Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-6-3131-2009 |
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Biogeosciences |
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6 |
container_issue |
12 |
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3131 |
op_container_end_page |
3147 |
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1766258222978564096 |