Structural and functional vulnerability to elevated pCO sub(2) in marine benthic communities
The effect of elevated pCO sub(2)/low pH on marine invertebrate benthic biodiversity, community structure and selected functional responses which underpin ecosystem services (such as community production and calcification) was tested in a medium-term (30 days) mesocosm experiment in June 2010. Stand...
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| Vydáno v: | Marine biology Ročník 160; číslo 8; s. 2113 - 2128 |
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| Hlavní autoři: | , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
| Vydáno: |
01.08.2013
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| Témata: | |
| ISSN: | 0025-3162, 1432-1793 |
| On-line přístup: | Získat plný text |
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| Shrnutí: | The effect of elevated pCO sub(2)/low pH on marine invertebrate benthic biodiversity, community structure and selected functional responses which underpin ecosystem services (such as community production and calcification) was tested in a medium-term (30 days) mesocosm experiment in June 2010. Standardised intertidal macrobenthic communities, collected (50.3567 degree N, 4.1277 degree W) using artificial substrate units (ASUs), were exposed to one of seven pH treatments (8.05, 7.8. 7.6, 7.4, 7.2, 6.8 and 6.0). Community net calcification/dissolution rates, as well as changes in biomass, community structure and diversity, were measured at the end of the experimental period. Communities showed significant changes in structure and reduced diversity in response to reduced pH: shifting from a community dominated by calcareous organisms to one dominated by non-calcareous organisms around either pH 7.2 (number of individuals and species) or pH 7.8 (biomass). These results were supported by a reduced total weight of CaCO sub(3) structures in all major taxa at lowered pH and a switch from net calcification to net dissolution around pH 7.4 (Naira sub(calc) = 0.78, Naira sub(ara) = 0.5). Overall community soft tissue biomass did not change with pH and high mortality was observed only at pH 6.0, although molluscs and arthropods showed significant decreases in soft tissue. This study supports and refines previous findings on how elevated pCO sub(2) can induce changes in marine biodiversity, underlined by differential vulnerability of different phyla. In addition, it shows significant elevated pCO sub(2)-/low pH-dependent changes in fundamental community functional responses underpinning changes in ecosystem services. |
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| Bibliografie: | ObjectType-Article-1 SourceType-Scholarly Journals-1 content type line 23 ObjectType-Feature-2 |
| ISSN: | 0025-3162 1432-1793 |
| DOI: | 10.1007/s00227-012-2097-0 |