Marine Science Institute, University of the Philippines, Diliman, Quezon City, 1101, Philippines.
Marine Science Institute, University of the Philippines, Diliman, Quezon City, 1101, Philippines.
Mar Pollut Bull. 2020 Jan;150:110703. doi: 10.1016/j.marpolbul.2019.110703. Epub 2019 Nov 16.
Recurrent thermal stress events and intensified precipitation alter the ocean environment resulting in the decline of coral populations. However, the influence of these changes on larval survival and settlement is not well understood. We examined the effect of salinity (15, 20, 25, 30, 35, and 40 ppt) and temperature (27 °C, 30 °C, and 33 °C) on settlement and survival of larvae of the octocoral, Heliopora coerulea. Larvae settled successfully at salinities from 25 to 30 ppt. On the other hand, larval survival and settlement decreased with increasing temperature. A combination of 25-35 ppt and 27-30 °C resulted in highest survival and settlement. These results indicate that early life stages of H. coerulea are negatively impacted by thermal stress but may be able to survive at reduced salinity. The wider tolerance range of H. coerulea larvae compared to most scleractinian larvae may thus contribute to the success of this coral on disturbed reef ecosystems.
反复出现的热应力事件和加剧的降水改变了海洋环境，导致珊瑚种群减少。然而，这些变化对幼虫存活和附着的影响还不是很清楚。我们研究了盐度（15、20、25、30、35 和 40 ppt）和温度（27°C、30°C 和 33°C）对八放珊瑚海鸡冠珊瑚幼虫附着和存活的影响。幼虫在 25 至 30 ppt 的盐度下成功附着。另一方面，幼虫的存活和附着随温度升高而下降。25-35 ppt 和 27-30°C 的组合导致最高的存活率和附着率。这些结果表明，海鸡冠珊瑚的早期生命阶段受到热应激的负面影响，但可能能够在低盐度下生存。与大多数石珊瑚幼虫相比，海鸡冠珊瑚幼虫的更宽的耐受范围可能有助于这种珊瑚在受干扰的珊瑚礁生态系统中的成功。
