Temperature and feeding induce tissue level changes in autotrophic and heterotrophic nutrient allocation in the coral symbiosis - A NanoSIMS study.

ABSTRACT: Corals access inorganic seawater nutrients through their autotrophic endosymbiotic dinoflagellates, but also capture planktonic prey through heterotrophic feeding. Correlating NanoSIMS and TEM imaging, we visualized and quantified the subcellular fate of autotrophic and heterotrophic C and N in the coral Stylophora pistillata using stable isotopes. Six scenarios were compared after 6 h: autotrophic pulse (¹³C-bicarbonate, ¹⁵N-nitrate) in either unfed or regularly fed corals, and heterotrophic pulse (¹³C-, ¹⁵N-labelled brine shrimps) in regularly fed corals; each at ambient and elevated temperature. Host assimilation of photosynthates was similar under fed and unfed conditions, but symbionts assimilated 10% more C in fed corals. Photoautotrophic C

SUBMITTER: Krueger T 

PROVIDER: S-EPMC6107511 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature