Megafauna Can Control the Quality of Organic Matter in Marine Sediments
Megafauna Can Control the Quality of Organic Matter in Marine Sediments
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巨型动物可以控制海洋沉积物中有机物的质量
DOI：
10.1007/s001140050624
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发表时间：
1999
影响因子：
--
通讯作者：
A. Patience
中科院分区：
文献类型：
--
作者：
B. Smallwood;G. Wolff;B. Bett;C. R. Smith;D. Hoover;J. Gage;A. Patience
摘要在高产的阿拉伯海阿曼边缘，强烈的永久性氧气最小值冲击大陆坡，氧气浓度和沉积有机碳含量之间没有关系。 然而，我们提供的照片和分子证据表明，底栖无脊椎动物在有机物的再分配中发挥着重要作用。高密度的蜘蛛蟹和脆星的特点是一个狭窄的带附近的基地的氧最小区，沉积物中耗尽的有机碳含量和显着的脂质成分，这是指示代谢的无脊椎动物食虫植物甾醇衍生的甾醇。沉积甾醇的分布和高丰度的表生动物的螃蟹和脆性明星表明，代谢的大型底栖生物深刻影响的质量有机质在底层沉积物。
Abstract On the highly productive Oman Margin of the Arabian Sea, where an intense permanent oxygen minimum impinges on the continental slope, there is no relationship between oxygen concentration and sedimentary organic-carbon content. However, we provide photographic and molecular evidence that benthic invertebrates play a significant role in the redistribution of organic matter. High densities of spider crabs and brittle stars characterize a narrow band near the base of the oxygen minimum zone, where sediments have depleted organic carbon contents and a remarkable lipid composition that is indicative of metabolic alteration of phytoplankton-derived sterols by invertebrate detritivores. The distributions of sedimentary sterols and the high abundances of epifaunal crabs and brittle stars suggest that the metabolism of the megabenthos profoundly influences the quality of organic matter in underlying sediments.