Microbial composition of biofilms associated with lithifying rubble of Acropora palmata branches
Journal Article
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· FEMS Microbiology Ecology (Online)
- National Autonomous Univ. of Mexico (UNAM), Mexico City (Mexico). Inst. of Ecology, Bacterial Ecology Lab.
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth & Environmental Sciences, Ecology Dept.
- National Autonomous Univ. of Mexico (UNAM), Cancún, Quintana Roo (Mexico). Inst. of Marine Sciences and Limnology, Academic Unit of Reef Systems (UASA)
Coral reefs are among the most productive ecosystems on the planet, but are rapidly declining due to global-warming-mediated changes in the oceans. Particularly for the Caribbean region, Acropora sp. stony corals have lost ~80% of their original coverage, resulting in vast extensions of dead coral rubble. We analyzed the microbial composition of biofilms that colonize and lithify dead Acropora palmata rubble in the Mexican Caribbean and identified the microbial assemblages that can persist under scenarios of global change, including high temperature and low pH. Lithifying biofilms have a mineral composition that includes aragonite and magnesium calcite (16 mole% MgCO3) and calcite, while the mineral phase corresponding to coral skeleton is basically aragonite. Microbial composition of the lithifying biofilms are different in comparison to surrounding biotopes, including a microbial mat, water column, sediments and live A. palmata microbiome. Significant shifts in biofilm composition were detected in samples incubated in mesocosms. The combined effect of low pH and increased temperature demonstrated a strong effect after two-week incubations for biofilm composition. Results indicate that lithifying biofilms could remain as a secondary structure on reef rubble possibly impacting the functional role of coral reefs.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1580074
- Journal Information:
- FEMS Microbiology Ecology (Online), Journal Name: FEMS Microbiology Ecology (Online) Journal Issue: 1 Vol. 92; ISSN 1574-6941
- Publisher:
- Federation of European Microbiological SocietiesCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Metagenome of Acropora palmata coral rubble: Potential metabolic pathways and diversity in the reef ecosystem
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journal | August 2019 |
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· Geol. Soc. Am., Abstr. Programs; (United States)
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OSTI ID:6195720