Benthic foraminiferal microhabitats below the sediment-water interface
Benthic foraminiferal microhabitats below the sediment-water interface
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DOI：
10.1007/0-306-48104-9_10
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
F. Jorissen
中科院分区：
文献类型：
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作者：
F. Jorissen
底栖有孔虫并不只生活在沉积物-水界面，还可以在相当深的海洋沉积物中发现活的，在许多情况下可以低至10厘米(图10.1)。在这个深度区间内，自然环境发生了很大的变化，特别是在细粒沉积物的情况下，表层和深层沉积物形成了两个截然不同的世界。在沉积物-水界面，海水可能富含(甚至饱和)氧气，经常可以获得优质有机物，而在光学带，则有光。在沉积物深处，条件有很大的不同：通常没有氧气，除了后生动物洞穴周围的光环，但可能有有毒物质(例如。此外，剩余的有机物质可能大多是难熔的，营养价值很低(见第11章)。显然，较深的沉积层，由于资源贫乏和缺氧，形成了许多生物不适宜居住甚至恶劣的环境，因此，动物生命通常是稀缺的(芬切尔和芬利，1995)。不过，
Benthic Foraminifera do not live exclusively at the sediment-water interface, and can be found alive at considerable depths in marine sediments, in many cases down to 10 cm (Fig. 10.1). Within this depth interval, large changes take place in the natural environment, especially in the case of finegrained sediments, the surface layer and the deep sediment layers forming two very different worlds. At the sediment-water interface, the sea water may be rich (even saturated) in oxygen, high-quality organic matter is often available, and in the photic zone, there is light. Deep in the sediment, conditions are drastically different: often there is no oxygen, except in halos around metazoan burrows, but there may be toxic substances (eg instead. Furthermore, the remaining organic matter may be mostly refractory, with a low nutritional value (see chapter 11). Apparently, the deeper sediment layers, with their poverty of resources and lack of oxygen, form an inhospitable or even hostile environment for many organisms, and as a consequence, animal life is generally scarce (Fenchel and Finlay, 1995). Nevertheless,