Reduced spore germination explains sensitivity of reef-building algae to climate change stressors
Reduced seawater pH and changes in carbonate chemistry associated with ocean acidification (OA) decrease the recruitment of crustose coralline algae (CCAcf.), an important coralreef builder. However, it is unclear whether the observed decline in recruitment is driven by impairment of spore germinati...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:ed5e0c9 2023-05-15T17:50:34+02:00 Reduced spore germination explains sensitivity of reef-building algae to climate change stressors Ordonez, Alexandra Kennedy, Emma V. Diaz-Pulido, Guillermo Chen, Chaolun Allen 2017-12-05 https://espace.library.uq.edu.au/view/UQ:ed5e0c9 eng eng Public Library of Science doi:10.1371/journal.pone.0189122 issn:1932-6203 orcid:0000-0003-1821-9740 DP-120101778 Crustose Coralline Algae Ocean Acidification Carbon-Dioxide Marine Organisms Partial-Pressure Lowered Ph Temperature Responses Co2 Calcification Journal Article 2017 ftunivqespace https://doi.org/10.1371/journal.pone.0189122 2020-12-08T05:22:10Z Reduced seawater pH and changes in carbonate chemistry associated with ocean acidification (OA) decrease the recruitment of crustose coralline algae (CCAcf.), an important coralreef builder. However, it is unclear whether the observed decline in recruitment is driven by impairment of spore germination, or post-settlement processes (e.g. space competition). To address this, we conducted an experiment using a dominant CCA, Porolithon cf. onkodes to test the independent and combined effects of OA, warming, and irradiance on its germination success and early development. Elevated CO2 negatively affected several processes of spore germination, including formation of the germination disc, initial growth, and germling survival. The magnitude of these effects varied depending on the levels of temperature and irradiance. For example, the combination of high CO2 and high temperature reduced formation of the germination disc, but this effect was independent of irradiance levels, while spore abnormalities increased under high CO2 and high temperature particularly in combination with low irradiance intensity. This study demonstrates that spore germination of CCA is impacted by the independent and interactive effects of OA, increasing seawater temperature and irradiance intensity. For the first time, this provides a mechanism for how the sensitivity of critical early life history processes to global change may drive declines of adult populations of key marine calcifiers. Article in Journal/Newspaper Ocean acidification The University of Queensland: UQ eSpace PLOS ONE 12 12 e0189122 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Crustose Coralline Algae Ocean Acidification Carbon-Dioxide Marine Organisms Partial-Pressure Lowered Ph Temperature Responses Co2 Calcification |
spellingShingle |
Crustose Coralline Algae Ocean Acidification Carbon-Dioxide Marine Organisms Partial-Pressure Lowered Ph Temperature Responses Co2 Calcification Ordonez, Alexandra Kennedy, Emma V. Diaz-Pulido, Guillermo Reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
topic_facet |
Crustose Coralline Algae Ocean Acidification Carbon-Dioxide Marine Organisms Partial-Pressure Lowered Ph Temperature Responses Co2 Calcification |
description |
Reduced seawater pH and changes in carbonate chemistry associated with ocean acidification (OA) decrease the recruitment of crustose coralline algae (CCAcf.), an important coralreef builder. However, it is unclear whether the observed decline in recruitment is driven by impairment of spore germination, or post-settlement processes (e.g. space competition). To address this, we conducted an experiment using a dominant CCA, Porolithon cf. onkodes to test the independent and combined effects of OA, warming, and irradiance on its germination success and early development. Elevated CO2 negatively affected several processes of spore germination, including formation of the germination disc, initial growth, and germling survival. The magnitude of these effects varied depending on the levels of temperature and irradiance. For example, the combination of high CO2 and high temperature reduced formation of the germination disc, but this effect was independent of irradiance levels, while spore abnormalities increased under high CO2 and high temperature particularly in combination with low irradiance intensity. This study demonstrates that spore germination of CCA is impacted by the independent and interactive effects of OA, increasing seawater temperature and irradiance intensity. For the first time, this provides a mechanism for how the sensitivity of critical early life history processes to global change may drive declines of adult populations of key marine calcifiers. |
author2 |
Chen, Chaolun Allen |
format |
Article in Journal/Newspaper |
author |
Ordonez, Alexandra Kennedy, Emma V. Diaz-Pulido, Guillermo |
author_facet |
Ordonez, Alexandra Kennedy, Emma V. Diaz-Pulido, Guillermo |
author_sort |
Ordonez, Alexandra |
title |
Reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
title_short |
Reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
title_full |
Reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
title_fullStr |
Reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
title_full_unstemmed |
Reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
title_sort |
reduced spore germination explains sensitivity of reef-building algae to climate change stressors |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
https://espace.library.uq.edu.au/view/UQ:ed5e0c9 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.1371/journal.pone.0189122 issn:1932-6203 orcid:0000-0003-1821-9740 DP-120101778 |
op_doi |
https://doi.org/10.1371/journal.pone.0189122 |
container_title |
PLOS ONE |
container_volume |
12 |
container_issue |
12 |
container_start_page |
e0189122 |
_version_ |
1766157382848610304 |