The Barrier Reef sediment apron: Tobacco Reef, Belize
The Barrier Reef sediment apron: Tobacco Reef, Belize
复制标题
堡礁沉积物围裙：伯利兹烟草礁
作者：
I. Macintyre;Richard R. Graus;P. Reinthal;M. Littler;D. S. Littler
对伯利兹堡礁的连续部分烟草礁的礁背沉积物裙带进行的沉积学和生物调查揭示了五个不同的生物地质区域：(1) 珊瑚-珊瑚-网状铺地层，(2) Turbinaria-马尾藻碎石，(3) Laurencia-Acanthophora 砂和砾石，(4) 裸砂和 95 Thalassia 砂。这些区域与整个 9 公里长的珊瑚礁平行。这些区域的分布与鱼类食草的空间格局、底部沉积物的大小和底质的稳定性有关。沉积学和水动力研究表明，该地区的大部分沉积物是在风暴或飓风活动期间从礁顶和前礁迁移而来的，其尺寸分布很大程度上是这些时期高底水流速差异迁移的结果。
Sedimentological and biological surveys of the back-reef sediment apron of Tobacco Reef, a continuous segment of the Belizean Barrier Reef, reveal five distinct biogeological zones: (1) coralline-coral-Dictyota pavement, (2) Turbinaria-Sargassum rubble, (3) Laurencia-Acanthophora sand and gravel, (4) bare sand and 95 Thalassia sand. These zones parallel the entire 9-km reef. The distribution of these zones is related to the spatial patterns of fish herbivory, the size of bottom sediments, and the stability of the substrate. Sedimentological and hydrodynamic studies indicate that most of the sediments in this area are transported from the reef crest and fore reef during periods of storm or hurricane activity and that their size distribution is largely the result of differential transport by high bottom-water velocities during those periods.