Calcification, photosynthesis and nutritional status of the hermatypic coral Porites lutea: contrasting case studies from Indonesia and Thailand.
Sawall, Yvonne, Khokiattiwong, Somkiat, Jompa, Jamaluddin and Richter, Claudio (2014) Calcification, photosynthesis and nutritional status of the hermatypic coral Porites lutea: contrasting case studies from Indonesia and Thailand. Galaxea, Journal of Coral Reef Studies, 16 (1). pp. 1-10. DOI https://doi.org/10.3755/galaxea.16.1.
Full text not available from this repository.Abstract
In situ incubation experiments, complemented by tissue analyses, were conducted with the coral Porites lutea at four sites featuring contrasting environmental conditions: two shallow (3m) reefs in Spermonde Archi-pelago (Indonesia) subjected to coastal pollution (Lae Lae, LL) and oligotrophic waters (Bonebatang, BBA), respectively; a deep (20m, KR-D) and a shallow (7m, KR-S) reef at off-shore Ko Racha (KR) in the Andaman Sea (Thailand) subjected to pulsed upwelling. Mean tem-perature varied only little (29-30°C). While most tis-sue parameters responded to light and nutrient changes as ex-pected, metabolic rates revealed surprising patterns: 3-fold elevated calcification occurred at KR-S compared to all other sites despite reduced gross photosynthesis. Fur-ther-more, equal photosynthesis occurred in 7 and 20m depth at KR, despite a 5-fold reduction in light intensity, which could not be solely ascribed to photo-acclimation processes, such as increased cell-specific chlorophyll a in 20m depth. These findings support the notion of a highly flexible species and indicate that this might partly be ascribed to a strong variation in the internal turnover of oxygen and nutrients between coral host and zooxanthellae, meaning a strong variation in the rates of energy ac-quisition. Those differences are particularly difficult to determine in situ, but require greater attention in the future in order to enhance our understanding of metabolic pro-cesses and acclimatization abilities.
Document Type: | Article |
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Programme Area: | UNSPECIFIED |
Research affiliation: | Ecology |
Refereed: | Yes |
Open Access Journal?: | No |
DOI: | https://doi.org/10.3755/galaxea.16.1 |
ISSN: | 1883-0838 |
Date Deposited: | 15 Aug 2019 13:21 |
Last Modified: | 01 Oct 2020 12:59 |
URI: | http://cris.leibniz-zmt.de/id/eprint/2583 |
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