Stuhldreier, Ines, Bastian, Pepe, Schönig, Eike and Wild, Christian (2015) Effects of simulated eutrophication and overfishing on algae and invertebrate settlement in a coral reef of Koh Phangan, Gulf of Thailand. Marine Pollution Bulletin, 92 (1-2). pp. 35-44. DOI

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Coral reefs in the Gulf of Thailand are highly under-investigated regarding responses to anthropogenic stressors. Thus, this study simulated overfishing and eutrophication using herbivore exclosure cages and slow-release fertilizer to study the in-situ effects on benthic algae and invertebrate settlement in a coral reef of Koh Phangan, Thailand. Settlement of organisms and the development of organic matter on light-exposed and shaded tiles were quantified weekly/biweekly over a study period of 12 weeks. Simulated eutrophication did not significantly influence response parameters, while simulated overfishing positively affected dry mass, turf algae height and fleshy macroalgae occurrence on light-exposed tiles. On shaded tiles, settlement of crustose coralline algae decreased, while abundances of ascidians increased compared to controls. An interactive effect of both stressors was not observed. These results hint to herbivory as actual key controlling factor on the benthic community, and fleshy macroalgae together with ascidians as potential bioindicators for local overfishing.

Document Type: Article
Programme Area: UNSPECIFIED
Research affiliation: Affiliations > Not ZMT
Refereed: Yes
Open Access Journal?: No
DOI etc.:
ISSN: 0025326X
Date Deposited: 06 Aug 2019 13:52
Last Modified: 01 Oct 2020 12:59

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