Effects of in situ CO2 enrichment on Posidonia oceanica epiphytic community composition and mineralogy
Autor: | Jean-Pierre Gattuso, Merinda C. Nash, M. Déniel, A. Le Fur, E. Legrand, P. Mahacek, Samir Alliouane, Sophie G. Martin, Frédéric Gazeau, T. E. Cox |
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Přispěvatelé: | Laboratoire d'océanographie de Villefranche (LOV), Observatoire océanologique de Villefranche-sur-mer (OOVM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Dauphin Island Sea Lab, University of South Alabama, Australian National University (ANU), Smithsonian Institution, Ecogéochimie et Fonctionnement des Ecosystèmes Benthiques (EFEB), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff [Roscoff] (SBR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute for Sustainable Development and International Relations, Sciences Po (Sciences Po), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Institut du Développement Durable et des Relations Internationales (IDDRI), Institut d'Études Politiques [IEP] - Paris |
Rok vydání: | 2017 |
Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Water flow Mineralogy Aquatic Science 01 natural sciences chemistry.chemical_compound Botany 14. Life underwater [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Ecology biology 010604 marine biology & hydrobiology Coralline algae Ocean acidification 15. Life on land biology.organism_classification Seagrass chemistry 13. Climate action Posidonia oceanica Carbon dioxide Epiphyte [SDV.EE.BIO]Life Sciences [q-bio]/Ecology environment/Bioclimatology Calcareous |
Zdroj: | Marine Biology Marine Biology, Springer Verlag, 2017, 164 (5), pp.103. ⟨10.1007/s00227-017-3136-7⟩ Marine Biology, 2017, 164 (5), pp.103. ⟨10.1007/s00227-017-3136-7⟩ |
ISSN: | 1432-1793 0025-3162 |
DOI: | 10.1007/s00227-017-3136-7 |
Popis: | International audience; 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. |
Databáze: | OpenAIRE |
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