壳状珊瑚藻对鹿角珊瑚幼虫附着与变态及后期存活率的影响研究

The hermatypic corals are the basic framework organisms in the reef ecosystems, being in a degraded state for the influence of many negative factors in recent years. It is extremely urgent to do the coral reef recruitment. The key of the coral community recruitment is that large amounts of coral larvae are available in the reef. In this study, the indoor cultivation and natural reintroduction will be applied to study the specific types selecting of coral larval settlement and metamorphosis to the coralline algae, and focuses on the relationship between the post-settlement survival of coral larvae and coralline algae. In return, this will provide good reference and support for the coral larval culture by using crustose coralline algae. The proposed research will significantly contribute to our basic understanding on the coral community recruitment measures, not only on the evaluating the coral recruitment resilience under natural state, but also benefiting the scientific designation and effective management in coral reef protected areas.

造礁石珊瑚是珊瑚礁生态系统中的基本框架生物，近年来受到诸多因素的影响已处于退化状态,进行珊瑚礁恢复已迫在眉睫。造礁石珊瑚群落恢复的关键在于礁体能够产生大量的珊瑚幼体补充。本研究运用室内培养与自然放归的方法，通过深入研究造礁石珊瑚幼虫的附着与变态对壳状珊瑚藻种类选择特异性，着重探讨珊瑚幼虫附着后的存活率与珊瑚藻的关系。进而为利用壳状珊瑚藻进行珊瑚幼体培育提供参考和支撑。研究成果将深化对造礁石珊瑚群体恢复的措施的认识，不仅对于评估造礁石珊瑚在自然状态下的群落恢复力具重要意义，也对珊瑚礁保护区的科学设计与有效管理也具有指导价值。

本项目主要研究了壳状珊瑚藻对造礁石珊瑚幼虫附着率及附着后存活率的作用。结果表明，壳状珊瑚藻较其他类型的附着基对珊瑚幼虫有较高的促进作用；而且只要有壳状珊瑚藻的存在，无论活体或者死亡，这种促进作用都较为明显。对于维持幼虫附着变态后的存活率，珊瑚藻比其他类型的附着基同样有较显著的作用，而且活体珊瑚藻的作用似乎更为明显。这种结果对于今后的珊瑚幼虫培养的成功率有更高的保障，进而能为其他项目的实施提供更为充足的有性繁殖珊瑚个体，从而保证珊瑚礁保护与修复项目能够有效实施。在本项目的支持下，还进行了其他问题的研究。