Centre for Marine Ecosystems Research and School of Natural Sciences, Edith Cowan University, Joondalup, WA 6027, Australia.
Mar Pollut Bull. 2011 Feb;62(2):270-83. doi: 10.1016/j.marpolbul.2010.11.001. Epub 2010 Dec 4.
A large-scale, manipulative experiment was conducted to examine the extent and rate of recovery of meadows of the temperate Australian seagrass, Amphibolis griffithii to different light-reduction scenarios typical of dredging operations, and to identify potential indicators of recovery from light reduction stress. Shade cloth was used to mimic different intensities, durations and start times of light reduction, and then was removed to assess the recovery. The meadow could recover from 3 months of light stress (5-18% ambient) following 10 months re-exposure to ambient light, even when up to 72% of leaf biomass was lost, much faster recovery rates than has previously been observed for large seagrasses. However, when the meadow had been shaded for 6-9 months and more than 82% of leaf biomass was lost, no recovery was detected up to 23 months after the light stress had ceased, consistent with other studies. Five potential indicators of recovery were recommended.
进行了一项大规模的、有操控性的实验，以检验温带澳大利亚海草 Amphibolis griffithii 草地在疏浚作业中典型的不同程度光减少情况下的恢复程度和速度，并确定从光减少胁迫中恢复的潜在指标。使用遮阳布模拟不同的光减少强度、持续时间和开始时间，然后将其移除以评估恢复情况。即使在高达 72%的叶片生物量损失的情况下，草地在重新暴露于环境光 10 个月后，也可以从 3 个月的光胁迫（5-18%环境光）中恢复，其恢复速度比以前观察到的大型海草要快得多。然而，当草地被遮荫 6-9 个月且超过 82%的叶片生物量损失时，在光胁迫停止后长达 23 个月仍未检测到恢复，这与其他研究一致。建议了 5 个潜在的恢复指标。
