The Lago Enriquillo fringing reef (Dominican Republic): a unique window into Holocene coral reef ecosystems of the Caribbean Sea

The Lago Enriquillo fringing reef (Dominican Republic): a unique window into Holocene coral reef ecosystems of the Caribbean Sea
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恩里基洛湖岸礁(多米尼加共和国):了解加勒比海全新世珊瑚礁生态系统的独特窗口

DOI:
10.1007/s00531-013-0869-5
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发表时间:
2013
影响因子:
2.3
通讯作者:
Lohmann
Lohmann
中科院分区:
地球科学3区
文献类型:
--
作者:
Reuter;Böcker;Lohmann

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在多米尼加共和国西南部的恩里基洛山谷包括壮观的露头,在一个非常保存完好的边缘珊瑚礁,蓬勃发展的约。9.0-5.0 ka BP,冰后期海平面上升的最后阶段(Mann et al. 1984)。相对年轻的年龄和干燥的气候有利于珊瑚礁生物群的良好保存(Greer等人,2009年)(图1)。沿着恩里基洛湖的海岸,在几个沿着侵蚀的冲沟中,有数百米长的连续样带穿过珊瑚礁。这些暴露揭示了一个独特的生态分区,包括浅水分支珊瑚区(图1)和深水混合珊瑚区,具有块状和片状生长形式,这是中等波浪暴露的加勒比海活珊瑚礁的典型特征(Stemann和约翰逊,1992年; Lescinsky等人,2012年)。最令人印象深刻的珊瑚形成是巨大的鹿角珊瑚碎石堆,代表了最浅的珊瑚礁区(Greer等人,2009年)。连接现今湖泊和加勒比海的海上航道灾难性关闭后,干旱状况普遍存在,导致Lago Enriquillo蒸发下降到海平面以下42米的目前位置,整个堆积物暴露在陆上(Mann等人,1984)。它提供了一个不寻常的机会,研究一个构造未变形的全新世珊瑚礁与地质领域的方法和没有限制的水肺潜水员。独特的,地球化学原始保护和特殊的地球动力学和气候环境使Enriquillo山谷成为一个独特的GeoSite,以研究化石礁生态系统中所有规模的环境变化和相关的生态梯度。耐沉积物珊瑚物种的丰富程度及其形成几乎单一种的珊瑚林和边缘参差不齐的圆顶锥的趋势(图1)表明存在高沉积环境(Cuevas等人,2008年)。Montastraea和Siderastrea的稳定同位素数据显示了降水的十年周期性(风暴频率)。珊瑚骨骼的~(18)O/~(16)O比值基本上受淡水控制
The Enriquillo Valley in the southwestern Dominican Republic comprises spectacular outcrops in an extremely well-preserved fringing coral reef that thrived ca. 9.0–5.0 ka BP during the final stage of post-glacial rise of sea level (Mann et al. 1984). The relatively young age and dry climate have favored an excellent preservation of the reef biota (Greer et al. 2009)(Fig. 1). Over hundreds of meters of continuous transect through the reefs are exposed in several erosional gullies along the shore of Lago Enriquillo. These exposures reveal a distinct ecological zonation comprised of a shallow water branching coral zone (Fig. 1) and a deeper water mixed-coral zone with massive and platy growth forms that is typical for living Caribbean reefs with moderate wave exposure (Stemann and Johnson 1992; Lescinsky et al. 2012). The most impressive coral formations are enormous piles of Acropora cervicornis rubble representing the shallowest reef zone (Greer et al. 2009).Arid conditions prevailed after catastrophic closure of the marine seaway connecting the present-day lake with the Caribbean Sea resulting in evaporative drawdown of Lago Enriquillo to its present position at 42 m below sea level and subaerial exposure of the buildup as a whole (Mann et al. 1984). It provides the unusual opportunity of studying a tectonically undeformed Holocene reef with geological field methods and without the limitations of a scuba diver. The peculiar, geochemically pristine preservation and special geodynamic and climatic setting render the Enriquillo Valley to a unique GeoSite to examine all scales of environmental changes and related ecological gradients in a fossil reef ecosystem. The high abundance of sediment-tolerant coral species and their tendency to form almost monospecific stands and dome-cones with ragged margins (Fig. 1) indicate a high-sedimentation environment (Cuevas et al. 2008). Stable isotope data from Montastraea and Siderastrea have revealed decadal cyclicity in precipitation (storm frequency). 18O/16O ratios of the coral skeletons seem to be essentially controlled by freshwater
控制来自多米尼加共和国西南部加拿大宏达的全新世中期珊瑚礁群落结构、形态和线性延伸的环境因素
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
D. Cuevas;C. Sherman;W. Ramírez;D. Hubbard
通讯作者: D. Hubbard
多米尼加共和国恩里基略谷地下裸露的全新世珊瑚礁
DOI: --
发表时间: 1984
期刊:
影响因子: --
作者:
P. Mann;F. Taylor;K. Burke;R. Kulstad
通讯作者: R. Kulstad
区域全新世中期降水的年代际循环:来自多米尼加珊瑚代理的证据
DOI: 10.1029/2005pa001166
发表时间: 2006
期刊: Paleoceanography
影响因子: --
作者:
L. Greer;P. Swart
通讯作者: P. Swart
多米尼加共和国恩里基洛山谷全新世中期珊瑚礁的珊瑚组合、生物相和生态区
DOI: --
发表时间: 1992
期刊:
影响因子: --
作者:
T. Stemann;K. Johnson
通讯作者: K. Johnson