Australian Institute of Marine Science (AIMS), Townsville, QLD, Australia; Australian Institute of Marine Science (AIMS), Perth, WA, Australia; Western Australian Marine Science Institution, 35 Stirling Highway, Crawley, WA 6009, Australia.
Mar Pollut Bull. 2017 Dec 15;125(1-2):289-300. doi: 10.1016/j.marpolbul.2017.08.036. Epub 2017 Aug 31.
The sediment rejection ability of 8 coral species of 5 families and 3 morphologies were assessed in a series of short term exposure tests over a sedimentation range of 0.5-40mgcmd and one longer term exposure test of 235mgcm. Sediment accumulation rates on live corals and dead (enamel-covered) skeletons varied between morphologies, with branching species often more adept at self-cleaning. Flow rates (0-17cms) significantly affected sediment-shedding ability as did differences in particle sizes, with coarse silt rejected faster than fine silt, but only at very high (235mgcm) deposition rates. Siliciclastic sediment was rejected faster than carbonate sediments and smothering for many days by mms of low organic content carbonate sediment resulted in bleaching, but no mortality. The findings are discussed with respect to turbidity generated in natural and dredging-related resuspension events and in the context for impact prediction for dredging projects.
评估了 5 科 8 种珊瑚物种的沉积排斥能力，这些珊瑚有 3 种形态，在 0.5-40mgcmd 的沉积范围内进行了一系列短期暴露试验，以及一项长达 235mgcm 的长期暴露试验。活体珊瑚和死（釉面）骨骼上的沉积物积累率因形态而异，分枝物种通常更擅长自我清洁。流速（0-17cms）以及粒径差异显著影响了沉积物脱落能力，粗粉砂比细粉砂脱落得更快，但仅在沉积率非常高（235mgcm）时才会如此。硅质碎屑比碳酸盐沉积物更容易被排斥，而数毫米低有机含量的碳酸盐沉积物的覆盖会导致白化，但不会导致死亡。这些发现与自然和疏浚相关的再悬浮事件中产生的浊度以及疏浚项目的影响预测进行了讨论。
