Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
As part of an investigation of the effects of water quality from dredging/natural resuspension on reefs, the effects of suspended sediment concentrations (SSCs) (0, 30, 100�mg�L−�1) and light (~�0, 1.1, 8.6�mol�photons�m−�2�d−�1) were examined alone and in combination, on the corals Acropora millepora, Montipora capricornis and Porites spp. over an extended (28�d) period. No effects were observed at any sediment concentrations when applied alone. All corals in the lowest light treatments lost chlorophyll a and discoloured (bleached) after a week. Coral mortality only occurred in the two lowest light treatments and was higher when simultaneously exposed to elevated SSCs. Compared to water quality data collected during large dredging programs and natural resuspension events (and in the absence of sediment deposition as a cause-effect pathway) these data suggest the light reduction associated with turbidity poses a proportionally greater risk than effects of elevated SSCs alone. � 2017 Elsevier Ltd
Australian Institute of Marine Science, Townsville, QLD, Australia; Australian Institute of Marine Science, Perth, WA, Australia; The Oceans Institute, The University of Western Australia, Perth, Western Australia, Australia; The Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia; Western Australian Marine Science Institution (WAMSI), PerthWestern Australia, Australia
Recommended Citation:
Bessell-Browne P.,Negri A.P.,Fisher R.,et al. Impacts of turbidity on corals: The relative importance of light limitation and suspended sediments[J]. Marine Pollution Bulletin,2017-01-01,117(2018-01-02)