Aspects of the biology of komokiagea and xenophyophoria
Aspects of the biology of komokiagea and xenophyophoria
复制标题
komokiagea 和 xenophyophoria 的生物学方面
DOI：
10.1080/00364827.1979.10411356
复制
发表时间：
1979
期刊：
影响因子：
--
通讯作者：
O. Tendal
中科院分区：
文献类型：
--
作者：
O. Tendal
摘要大多数大型原生动物群都存在于深海，原生动物在深海群落的组成和功能中起着重要作用。泥球和“天然结核”存在着许多问题，即在筛分过程中，以及在确定它们的来源、它们在海底的作用以及它们相对于生物的分类方面。事实上，被归类为这些地层的很大一部分是科莫基类和异源植物。komokiaceans和xenophyophores的身体尺寸很大，但血浆只占体积的很小一部分，而粪便颗粒的积累是惊人的广泛。基于胆甾醇的细胞内消化在这里可能已经被阐述成基于食物颗粒的细胞外运输和消化的系统。这可能与营养物质的长期利用相结合，因为封闭的粪便颗粒可以保护肠道微生物群落，从而提供营养物质。
Abstract Most larger groups of Protozoa have been shown to be represented at great depths, and protozoans are generally attributed a significant role in the composition and function of deep-sea communities. Mudballs and ‘natural concretions’ present a number of problems, viz. during the sieving procedure, and in determining their origin, their function on the bottom, and their classification relative to organisms. A large part of what has been classified as these formations are, in fact, komokiaceans and xenophyophores. The body size of komokiaceans and xenophyophores is large, but the plasma constitutes only a very small part of the volume, while accumulations of faecal pellets are strikingly extensive. Vacuole-based intracellular digestion may here have been elaborated into a system based on extracellular transport and digestion of food particles. This might be combined with a long-term utilization of the nutrients, as the enclosed masses of faecal pellets could protect a commensal microflora providing ...