Heterotrophic and autotrophic assimilation of fatty acids by two scleractinian corals, montastraea faveolata and porites astreoides

Mark A. Teece, Benjamin Estes, Eric Gelsleichter, Diego Lirman

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

We determined the source of fatty acids in scleractinian corals by separately measuring and comparing the δ13C values of fatty acids in zooxanthellae and coral hosts from two scleractinian coral species (Montastraea faveolata and Porites astreoides) from reefs of the Florida Reef Tract. Using an isotopic mass balance approach, we show that zooxanthellae are the dominant source of fatty acids and that in many colonies heterotrophic feeding can be an important and significant source of essential v3 fatty acids for corals. There is considerable variability in feeding behavior within species, between species, and within single reef sites. In individual colonies, essential ω3 fatty acids and energy resources such as triglycerides can be acquired from separate dietary sources, showing the importance of resource partitioning within the coral animal. Consistently, individual coral colonies acquire most of their energy-rich saturated fatty acids from their symbiotic zooxanthellae. The particular feeding mode by which corals acquire their fatty acids appears to be specific to each coral colony. The ability of corals to modulate their feeding modes under different environments may provide an adaptive mechanism to sustain growth under stressful conditions.

Original languageEnglish (US)
Pages (from-to)1285-1296
Number of pages12
JournalLimnology and Oceanography
Volume56
Issue number4
DOIs
StatePublished - Jul 2011

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

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