Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses
Seagrasses are globally important coastal habitat-forming species, yet it is unknown how seagrasses respond to the combined pressures of ocean acidification and warming of sea surface temperature. We exposed three tropical species of seagrass (Cymodocea serrulata, Halodule uninervis, and Zostera mue...
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ftjamescook:oai:researchonline.jcu.edu.au:55350 2023-09-05T13:22:09+02:00 Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses Collier, Catherine Langlois, Lucas Ow, Yan Johansson, Charlotte Giammusso, Manuela Adams, Matthew O'brien, Katherine Uthicke, Sven 2018-04-20 application/pdf https://researchonline.jcu.edu.au/55350/1/55350%20Collier%20et%20al%202018.pdf unknown Cambridge University Press https://doi.org/10.1111/nph.15234 https://researchonline.jcu.edu.au/55350/ https://researchonline.jcu.edu.au/55350/1/55350%20Collier%20et%20al%202018.pdf Collier, Catherine, Langlois, Lucas, Ow, Yan, Johansson, Charlotte, Giammusso, Manuela, Adams, Matthew, O'brien, Katherine, and Uthicke, Sven (2018) Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses. New Phytologist, 219 (3). pp. 1005-1017. restricted Article PeerReviewed 2018 ftjamescook https://doi.org/10.1111/nph.15234 2023-08-22T20:25:19Z Seagrasses are globally important coastal habitat-forming species, yet it is unknown how seagrasses respond to the combined pressures of ocean acidification and warming of sea surface temperature. We exposed three tropical species of seagrass (Cymodocea serrulata, Halodule uninervis, and Zostera muelleri) to increasing temperature (21, 25, 30, and 35°C) and pCO2 (401, 1014, and 1949 latm) for 7 wk in mesocosms using a controlled factorial design. Shoot density and leaf extension rates were recorded, and plant productivity and respiration were measured at increasing light levels (photosynthesis–irradiance curves) using oxygen optodes. Shoot density, growth, photosynthetic rates, and plant-scale net productivity occurred at 25°C or 30°C under saturating light levels. High pCO2 enhanced maximum net productivity for Z. muelleri, but not in other species. Z. muelleri was the most thermally tolerant as it maintained positive net production to 35°C, yet for the other species there was a sharp decline in productivity, growth, and shoot density at 35°C, which was exacerbated by pCO2. These results suggest that thermal stress will not be offset by ocean acidification during future extreme heat events and challenges the current hypothesis that tropical seagrass will be a 'winner' under future climate change conditions. Article in Journal/Newspaper Ocean acidification James Cook University, Australia: ResearchOnline@JCU New Phytologist 219 3 1005 1017 |
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James Cook University, Australia: ResearchOnline@JCU |
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ftjamescook |
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unknown |
description |
Seagrasses are globally important coastal habitat-forming species, yet it is unknown how seagrasses respond to the combined pressures of ocean acidification and warming of sea surface temperature. We exposed three tropical species of seagrass (Cymodocea serrulata, Halodule uninervis, and Zostera muelleri) to increasing temperature (21, 25, 30, and 35°C) and pCO2 (401, 1014, and 1949 latm) for 7 wk in mesocosms using a controlled factorial design. Shoot density and leaf extension rates were recorded, and plant productivity and respiration were measured at increasing light levels (photosynthesis–irradiance curves) using oxygen optodes. Shoot density, growth, photosynthetic rates, and plant-scale net productivity occurred at 25°C or 30°C under saturating light levels. High pCO2 enhanced maximum net productivity for Z. muelleri, but not in other species. Z. muelleri was the most thermally tolerant as it maintained positive net production to 35°C, yet for the other species there was a sharp decline in productivity, growth, and shoot density at 35°C, which was exacerbated by pCO2. These results suggest that thermal stress will not be offset by ocean acidification during future extreme heat events and challenges the current hypothesis that tropical seagrass will be a 'winner' under future climate change conditions. |
format |
Article in Journal/Newspaper |
author |
Collier, Catherine Langlois, Lucas Ow, Yan Johansson, Charlotte Giammusso, Manuela Adams, Matthew O'brien, Katherine Uthicke, Sven |
spellingShingle |
Collier, Catherine Langlois, Lucas Ow, Yan Johansson, Charlotte Giammusso, Manuela Adams, Matthew O'brien, Katherine Uthicke, Sven Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
author_facet |
Collier, Catherine Langlois, Lucas Ow, Yan Johansson, Charlotte Giammusso, Manuela Adams, Matthew O'brien, Katherine Uthicke, Sven |
author_sort |
Collier, Catherine |
title |
Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
title_short |
Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
title_full |
Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
title_fullStr |
Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
title_full_unstemmed |
Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
title_sort |
losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://researchonline.jcu.edu.au/55350/1/55350%20Collier%20et%20al%202018.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://doi.org/10.1111/nph.15234 https://researchonline.jcu.edu.au/55350/ https://researchonline.jcu.edu.au/55350/1/55350%20Collier%20et%20al%202018.pdf Collier, Catherine, Langlois, Lucas, Ow, Yan, Johansson, Charlotte, Giammusso, Manuela, Adams, Matthew, O'brien, Katherine, and Uthicke, Sven (2018) Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses. New Phytologist, 219 (3). pp. 1005-1017. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1111/nph.15234 |
container_title |
New Phytologist |
container_volume |
219 |
container_issue |
3 |
container_start_page |
1005 |
op_container_end_page |
1017 |
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1776202667972886528 |