Species‐specific responses to climate change and community composition determine future calcification rates of Florida Keys reefs
| Autor: | Andrew C. Baker, Chris Langdon, Ross Cunning, Ruben van Hooidonk, Remy Okazaki, Rivah N. Winter, Carolina Mor, Peter K. Swart, Erica K. Towle, James S. Klaus, Alan M. Piggot |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Climate Change Population Dynamics Scleractinia Biology 01 natural sciences Porites astreoides Siderastrea radians Animals Environmental Chemistry Seawater Reef 0105 earth and related environmental sciences General Environmental Science Global and Planetary Change geography geography.geographical_feature_category Ecology Coral Reefs Resilience of coral reefs 010604 marine biology & hydrobiology fungi Global warming Coral reef Anthozoa biology.organism_classification Oceanography Caribbean Region Florida geographic locations Siderastrea siderea |
| Zdroj: | Global Change Biology. 23:1023-1035 |
| ISSN: | 1365-2486 1354-1013 |
| DOI: | 10.1111/gcb.13481 |
| Popis: | Anthropogenic climate change compromises reef growth as a result of increasing temperatures and ocean acidification. Scleractinian corals vary in their sensitivity to these variables, suggesting species composition will influence how reef communities respond to future climate change. Because data are lacking for many species, most studies that model future reef growth rely on uniform scleractinian calcification sensitivities to temperature and ocean acidification. In order to address this knowledge gap, calcification of twelve common and understudied Caribbean coral species was measured for two months under crossed temperatures (27°C, 30.3°C) and CO2 partial pressures (pCO2) (400, 900, 1300 μatm). Mixed effects models of calcification for each species were then used to project community-level scleractinian calcification using Florida Keys reef composition data and IPCC AR5 ensemble climate model data. Three of the four most abundant species, Orbicella faveolata, Montastraea cavernosa, and Porites astreoides, had negative calcification responses to both elevated temperature and pCO2. In the business-as-usual CO2 emissions scenario, reefs with high abundances of these species had projected end-of-century declines in scleractinian calcification of >50% relative to present-day rates. Siderastrea siderea, the other most-common species, was insensitive to both temperature and pCO2 within the levels tested here. Reefs dominated by this species had the most stable end-of-century growth. Under more optimistic scenarios of reduced CO2 emissions, calcification rates throughout the Florida Keys declined |
| Databáze: | OpenAIRE |
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