| 摘要: |
| 研究海水升温对石珊瑚幼虫存活及附着的影响有助于理解和预测海洋暖化背景下幼虫的扩散和种群补充动态.探究了海水升温（+3℃）对壮实鹿角珊瑚（Acropora robusta）幼虫存活和附着的影响.两个温度下孵育7d后幼虫的存活率均大于90%，升温对珊瑚幼虫的存活并无明显的影响；在孔水石藻（Hydrolithon onkodes） 诱导下，3℃的升温使珊瑚幼虫的附着率提高了75%，同时升温改变了珊瑚幼虫的附着选择：30℃下孵育7d的幼虫中附着在塑料六孔板表面的比例是27℃条件下孵育的幼虫的13倍，然而二者中附着于珊瑚藻表面和侧面骨骼的幼虫比例相近.研究表明环境温度3℃以上7d的升温处理并不影响壮实鹿角珊瑚幼虫的存活，但会促进幼虫的附着进而缩短幼虫的浮游期，升温会限制珊瑚幼虫的扩散并对排卵型珊瑚种群间的遗传连通性产生潜在影响. |
| 关键词: 海洋生物学 温度 壮实鹿角珊瑚 珊瑚藻 幼虫 附着 |
| DOI：10.3969/J.ISSN.2095-4972.2016.02.010 |
|
| 基金项目:国家自然科学基金资助项目（41306144）;国家海洋公益性行业科研专项资助项目（201305030-3） |
|
| Effects of elevated temperature on larval survival and settlement of the broadcast spawning coral Acropora robusta |
| JIANG Lei,HUANG Hui,ZHANG Yuyang,LIU Sheng,LEI Xinming,YUAN Tao |
| (Key Laboratory of Tropical Marine Bioresources and Ecology， South China Sea Institute of Oceanology， CAS，Guangzhou 510301， China;Tropical Marine Biological Research Station in Hainan， CAS，Sanya 572000， China;University of Chinese Academy of Sciences， Beijing 100049， China) |
| Abstract: |
| This study investigates the effects of elevated temperature on the survival and settlement of larvae from broadcast spawning coral Acropora robusta. Five-day-old larvae were incubated at 27℃ and 30℃ for 7 days， and larval survival and settlement were assessed. It showed that survivorships of A. robusta larvae were not affected by elevated temperature with survival rate >90% at the two treatments after 7 days. Moreover， in the presence of crustose coralline algae （CCA） Hydrolithon onkodes， the settlement rate of A. robusta larvae at 30℃ was 75% higher than that at 27℃. In particular， the temperature elevation changed the settlement behaviors of coral larvae. Increased temperature did not affect the percentage of larvae settling rate on the surface and skeleton of H. onkodes， but there were about 13 times more larvae metamorphosing on plastic surface at 30℃ than at 27℃. The results suggest that a 3℃ higher in surface temperature do not alter the larval survivorship but promote the settlement， thus curtailing the pelagic phase and potentially altering patterns of larval dispersal and population connectivity. |
| Key words: marine biology temperature Acropora robusta crustose coralline algae larvae settlement |
