期刊
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
卷 92, 期 4, 页码 741-745出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0025315411000944
关键词
Pectinia lactuca; coral spawning; fertilization success; turbidity; suspended sediment; dredging
资金
- Ecoshape-Building with Nature
- Singapore-Delft Water Alliance (SDWA)
- Singapore Ministry of Education [R-154-000-432-112]
The effect of increased levels of suspended sediment on fertilization success in the scleractinian coral Pectinia lactuca was investigated in a laboratory experiment following a mass coral spawning event on reefs off Singapore. Egg-sperm bundles were collected from tank-spawned coral colonies collected from the field several days prior to the anticipated mass spawning. Eggs and sperm from each colony were separated and distributed systematically across replicated treatments (N = 9) with three concentrations of fine suspended sediment. Spawning and embryo development in Pectinia lactuca followed a pattern similar to other scleractinian coral species. There was a significant effect of increased suspended sediment concentration on fertilization success (P < 0.05). Both high-(169 mg l(-1)) and medium-(43 mg l(-1)) suspended sediment treatments decreased fertilization success compared to controls. These results imply that increased turbidity levels (whether chronic, such as in the waters around Singapore, or short-term, caused by a dredging operation)-when coinciding with the coral spawning season-may affect the reproductive success of corals and compromise coral recruitment and recovery of degraded reefs.
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