Effects of ocean acidification on population dynamics and community structure of crustose coralline algae
Calcification and growth of crustose coralline algae (CCA) are affected by elevated seawater pCO2 and associated changes in carbonate chemistry. However, the effects of ocean acidification (OA) on population and community-level responses of CCA have barely been investigated. We explored changes in c...
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Marine Biological Laboratory
2014
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Online Access: | https://espace.library.uq.edu.au/view/UQ:336881 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:336881 2023-05-15T17:50:50+02:00 Effects of ocean acidification on population dynamics and community structure of crustose coralline algae Ordonez, Alexandra Doropoulos, Christopher Diaz-Pulido, Guillermo 2014-06-01 https://espace.library.uq.edu.au/view/UQ:336881 eng eng Marine Biological Laboratory doi:10.1086/BBLv226n3p255 issn:0006-3185 issn:1939-8697 orcid:0000-0001-8038-2771 Not set ARC-D DP0988039 ARC-D DP120101778 ARC-L LP0989845 Tropical Pacific Climate-Change Co2 Settlement Responses Reefs Metamorphosis Recruitment Carbon Reproduction 1100 Agricultural and Biological Sciences Journal Article 2014 ftunivqespace https://doi.org/10.1086/BBLv226n3p255 2020-12-15T01:53:10Z Calcification and growth of crustose coralline algae (CCA) are affected by elevated seawater pCO2 and associated changes in carbonate chemistry. However, the effects of ocean acidification (OA) on population and community-level responses of CCA have barely been investigated. We explored changes in community structure and population dynamics (size structure and reproduction) of CCA in response to OA. Recruited from an experimental flow-through system, CCA settled onto the walls of plastic aquaria and developed under exposure to one of three pCO2 treatments (control [present day, 389 6 ppm CO2], medium [753 11 ppm], and high [1267 19 ppm]). Elevated pCO2 reduced total CCA abundance and affected community structure, in particular the density of the dominant species Pneophyllum sp. and Porolithon onkodes. Meanwhile, the relative abundance of P. onkodes declined from 24% under control CO2 to 8.3% in high CO2 (65% change), while the relative abundance of Pneophyllum sp. remained constant. Population size structure of P. onkodes differed significantly across treatments, with fewer larger individuals under high CO2. In contrast, the population size structure and number of reproductive structures (conceptacles) per crust of Pneophyllum sp. was similar across treatments. The difference in the magnitude of the response of species abundance and population size structure between species may have the potential to induce species composition changes in the future. These results demonstrate that the impacts of OA on key coral reef builders go beyond declines in calcification and growth, and suggest important changes to aspects of population dynamics and community ecology. Article in Journal/Newspaper Ocean acidification The University of Queensland: UQ eSpace Pacific The Biological Bulletin 226 3 255 268 |
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Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Tropical Pacific Climate-Change Co2 Settlement Responses Reefs Metamorphosis Recruitment Carbon Reproduction 1100 Agricultural and Biological Sciences |
spellingShingle |
Tropical Pacific Climate-Change Co2 Settlement Responses Reefs Metamorphosis Recruitment Carbon Reproduction 1100 Agricultural and Biological Sciences Ordonez, Alexandra Doropoulos, Christopher Diaz-Pulido, Guillermo Effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
topic_facet |
Tropical Pacific Climate-Change Co2 Settlement Responses Reefs Metamorphosis Recruitment Carbon Reproduction 1100 Agricultural and Biological Sciences |
description |
Calcification and growth of crustose coralline algae (CCA) are affected by elevated seawater pCO2 and associated changes in carbonate chemistry. However, the effects of ocean acidification (OA) on population and community-level responses of CCA have barely been investigated. We explored changes in community structure and population dynamics (size structure and reproduction) of CCA in response to OA. Recruited from an experimental flow-through system, CCA settled onto the walls of plastic aquaria and developed under exposure to one of three pCO2 treatments (control [present day, 389 6 ppm CO2], medium [753 11 ppm], and high [1267 19 ppm]). Elevated pCO2 reduced total CCA abundance and affected community structure, in particular the density of the dominant species Pneophyllum sp. and Porolithon onkodes. Meanwhile, the relative abundance of P. onkodes declined from 24% under control CO2 to 8.3% in high CO2 (65% change), while the relative abundance of Pneophyllum sp. remained constant. Population size structure of P. onkodes differed significantly across treatments, with fewer larger individuals under high CO2. In contrast, the population size structure and number of reproductive structures (conceptacles) per crust of Pneophyllum sp. was similar across treatments. The difference in the magnitude of the response of species abundance and population size structure between species may have the potential to induce species composition changes in the future. These results demonstrate that the impacts of OA on key coral reef builders go beyond declines in calcification and growth, and suggest important changes to aspects of population dynamics and community ecology. |
format |
Article in Journal/Newspaper |
author |
Ordonez, Alexandra Doropoulos, Christopher Diaz-Pulido, Guillermo |
author_facet |
Ordonez, Alexandra Doropoulos, Christopher Diaz-Pulido, Guillermo |
author_sort |
Ordonez, Alexandra |
title |
Effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
title_short |
Effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
title_full |
Effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
title_fullStr |
Effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
title_full_unstemmed |
Effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
title_sort |
effects of ocean acidification on population dynamics and community structure of crustose coralline algae |
publisher |
Marine Biological Laboratory |
publishDate |
2014 |
url |
https://espace.library.uq.edu.au/view/UQ:336881 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.1086/BBLv226n3p255 issn:0006-3185 issn:1939-8697 orcid:0000-0001-8038-2771 Not set ARC-D DP0988039 ARC-D DP120101778 ARC-L LP0989845 |
op_doi |
https://doi.org/10.1086/BBLv226n3p255 |
container_title |
The Biological Bulletin |
container_volume |
226 |
container_issue |
3 |
container_start_page |
255 |
op_container_end_page |
268 |
_version_ |
1766157745798512640 |