Bessell-Browne Pia, Negri Andrew P, Fisher Rebecca, Clode Peta L, Duckworth Alan, Jones Ross
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), Perth, Western Australia, Australia.
Australian Institute of Marine Science, Townsville, QLD, Australia; Western Australian Marine Science Institution (WAMSI), Perth, Western Australia, Australia.
Mar Pollut Bull. 2017 Apr 15;117(1-2):161-170. doi: 10.1016/j.marpolbul.2017.01.050. Epub 2017 Feb 2.
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, 100mgL) and light (~0, 1.1, 8.6molphotonsmd) were examined alone and in combination, on the corals Acropora millepora, Montipora capricornis and Porites spp. over an extended (28d) 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.
作为对疏浚/自然再悬浮产生的水质对珊瑚礁影响的调查的一部分，研究了悬浮沉积物浓度（SSC）（0、30、100mg/L）和光照（~0、1.1、8.6μmol光子/（平方米·天））单独及联合作用，对多孔鹿角珊瑚、鹿角杯形珊瑚和滨珊瑚属珊瑚长达28天的影响。单独施加任何沉积物浓度时均未观察到影响。最低光照处理组的所有珊瑚在一周后均失去叶绿素a并变色（白化）。珊瑚死亡率仅出现在两个最低光照处理组中，并且在同时暴露于升高的SSC时更高。与大型疏浚项目和自然再悬浮事件期间收集的水质数据相比（且不存在沉积物沉积作为因果途径），这些数据表明，与浊度相关的光照减少所带来的风险比单独升高的SSC的影响成比例地更大。
