Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy
Alterations in seagrass epiphytic communities are expected under future ocean acidification conditions, yet this hypothesis has been little tested in situ. A Free Ocean Carbon Dioxide Enrichment system was used to lower pH by a ~0.3 unit offset within a partially enclosed portion (1.7 m3) of a Posid...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/218002 2024-01-14T10:09:35+01:00 Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy Cox, T. E. Nash, Merinda Gazeau, F. Déniel, M. Legrand, E. Alliouane, S Mahacek, P Le Fur, A Gattuso, Jean-Pierre Martin, S application/pdf http://hdl.handle.net/1885/218002 https://doi.org/10.1007/s00227-017-3136-7 en_AU eng Springer 0025-3162 http://hdl.handle.net/1885/218002 doi:10.1007/s00227-017-3136-7 Marine Biology Journal article ftanucanberra https://doi.org/10.1007/s00227-017-3136-7 2023-12-15T09:34:48Z Alterations in seagrass epiphytic communities are expected under future ocean acidification conditions, yet this hypothesis has been little tested in situ. A Free Ocean Carbon Dioxide Enrichment system was used to lower pH by a ~0.3 unit offset within a partially enclosed portion (1.7 m3) of a Posidonia oceanica meadow (11 m depth) between June 21 and November 3, 2014. Leaf epiphytic community composition (% cover) and bulk epiphytic mineralogy were compared every 4 weeks within three treatments, located in the same meadow: a pH-manipulated (experimental enclosure) and a control enclosure, as well as a nearby ambient area. Percent coverage of invertebrate calcifiers and crustose coralline algae (CCA) did not appear to be affected by the lowered pH. Furthermore, fleshy algae did not proliferate at lowered pH. Only Foraminifera, which covered less than 3% of leaf surfaces, declined in manner consistent with ocean acidification predictions. Bulk epiphytic magnesium carbonate composition was similar between treatments and percentage of magnesium appeared to increase from summer to autumn. CCA did not exhibit any visible skeleton dissolution or mineral alteration at lowered pH and carbonate saturation state. Negative impacts from ocean acidification on P. oceanica epiphytic communities were smaller than expected. Epiphytic calcifiers were possibly protected from the pH treatment due to host plant photosynthesis inside the enclosure where water flow is slowed. The more positive outcome than expected suggests that calcareous members of epiphytic communities may find refuge in some conditions and be resilient to environmentally relevant changes in carbonate chemistry Article in Journal/Newspaper Ocean acidification Australian National University: ANU Digital Collections Marine Biology 164 5 |
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Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
description |
Alterations in seagrass epiphytic communities are expected under future ocean acidification conditions, yet this hypothesis has been little tested in situ. A Free Ocean Carbon Dioxide Enrichment system was used to lower pH by a ~0.3 unit offset within a partially enclosed portion (1.7 m3) of a Posidonia oceanica meadow (11 m depth) between June 21 and November 3, 2014. Leaf epiphytic community composition (% cover) and bulk epiphytic mineralogy were compared every 4 weeks within three treatments, located in the same meadow: a pH-manipulated (experimental enclosure) and a control enclosure, as well as a nearby ambient area. Percent coverage of invertebrate calcifiers and crustose coralline algae (CCA) did not appear to be affected by the lowered pH. Furthermore, fleshy algae did not proliferate at lowered pH. Only Foraminifera, which covered less than 3% of leaf surfaces, declined in manner consistent with ocean acidification predictions. Bulk epiphytic magnesium carbonate composition was similar between treatments and percentage of magnesium appeared to increase from summer to autumn. CCA did not exhibit any visible skeleton dissolution or mineral alteration at lowered pH and carbonate saturation state. Negative impacts from ocean acidification on P. oceanica epiphytic communities were smaller than expected. Epiphytic calcifiers were possibly protected from the pH treatment due to host plant photosynthesis inside the enclosure where water flow is slowed. The more positive outcome than expected suggests that calcareous members of epiphytic communities may find refuge in some conditions and be resilient to environmentally relevant changes in carbonate chemistry |
format |
Article in Journal/Newspaper |
author |
Cox, T. E. Nash, Merinda Gazeau, F. Déniel, M. Legrand, E. Alliouane, S Mahacek, P Le Fur, A Gattuso, Jean-Pierre Martin, S |
spellingShingle |
Cox, T. E. Nash, Merinda Gazeau, F. Déniel, M. Legrand, E. Alliouane, S Mahacek, P Le Fur, A Gattuso, Jean-Pierre Martin, S Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy |
author_facet |
Cox, T. E. Nash, Merinda Gazeau, F. Déniel, M. Legrand, E. Alliouane, S Mahacek, P Le Fur, A Gattuso, Jean-Pierre Martin, S |
author_sort |
Cox, T. E. |
title |
Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy |
title_short |
Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy |
title_full |
Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy |
title_fullStr |
Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy |
title_full_unstemmed |
Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy |
title_sort |
effects of in situ co2 enrichment on posidonia oceanica epiphytic community composition and mineralogy |
publisher |
Springer |
url |
http://hdl.handle.net/1885/218002 https://doi.org/10.1007/s00227-017-3136-7 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Marine Biology |
op_relation |
0025-3162 http://hdl.handle.net/1885/218002 doi:10.1007/s00227-017-3136-7 |
op_doi |
https://doi.org/10.1007/s00227-017-3136-7 |
container_title |
Marine Biology |
container_volume |
164 |
container_issue |
5 |
_version_ |
1788064124675031040 |