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首页> 外文期刊>Coral reefs: journal of the International Society for Reef Studies >Live coral cover in the fossil record: An example from Holocene reefs of the Dominican Republic
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Live coral cover in the fossil record: An example from Holocene reefs of the Dominican Republic

机译：化石记录中的活珊瑚覆盖物：以多米尼加共和国的全新世珊瑚礁为例

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摘要

Fossil reefs hold important ecological information that can provide a prehuman baseline for understanding recent anthropogenic changes in reefs systems. The most widely used proxy for reef "health," however, is live coral cover, and this has not been quantified in the fossil record because it is difficult to establish that even adjacent corals were alive at the same time. This study uses microboring and taphonomic proxies to differentiate between live and dead corals along well-defined time surfaces in Holocene reefs of the Enriquillo Valley, Dominican Republic. At Ca?ada Honda, live coral cover ranged from 59 to 80% along a contemporaneous surface buried by a storm layer, and the reef, as a whole had 33-80% live cover within the branching, mixed, massive and platy zones. These values equal or exceed those in the Dominican Republic and Caribbean today or reported decades ago. The values from the western Dominican Republic provide a geologic baseline against which modern anthropogenic changes in Caribbean reefs can be considered.
机译：化石礁拥有重要的生态信息，可以为理解珊瑚礁系统中最近的人为变化提供一个人类前的基线。然而，最常使用的代表“健康”的珊瑚礁是活珊瑚覆盖物，在化石记录中尚未量化，因为很难确定即使相邻的珊瑚也同时活着。这项研究使用微孔和末端代理来区分沿多米尼加共和国恩里基洛山谷全新世珊瑚礁中明确定义的时间表面的活珊瑚和死珊瑚。在本田岛，沿着被风暴层掩埋的同期表面，活珊瑚覆盖率在59％到80％之间，而珊瑚礁在分支，混合，块状和板状区域中总体上有33-80％的活覆盖率。这些值等于或超过今天或几十年前报告的多米尼加共和国和加勒比地区的值。来自多米尼加共和国西部的值提供了一个地质基线，可以根据该基线来考虑加勒比礁的现代人为变化。

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