Ecology of four infaunal bivalve species in the recent intertidal zone, Shikoku, Japan
Ecology of four infaunal bivalve species in the recent intertidal zone, Shikoku, Japan
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日本四国近代潮间带四种动物双壳类的生态学
DOI：
10.1016/0031-0182(87)90033-2
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Eiichi Arimura
中科院分区：
文献类型：
--
作者：
K. Tanabe;Eiichi Arimura
对日本四国西北部沿海地区潮间带的四种动物双壳类动物的活种群和死亡组合的空间和密度分布、发生模式和大小频率直方图进行了定量分析。结果表明，化石化早期过程中空贝壳的保存方式因物种和/或地区而异。居住在泥质基质中的深穴物种的埋藏学损失程度较低，并且活体种群的空间和密度分布以及大小频率数据在铰接的空壳组合中得到了很好的保存。相比之下，空壳在栖息地外的分散经常发生在较粗糙基质内的浅层动物群中。这项工作表明，深穴双壳类的铰接化石壳组合可能在种群水平上是本地的，并且它们可能对详细的古生态和古环境分析最有用。
Spatial and density distributions, mode of occurrence and size-frequency histograms in living populations and death assemblages were analyzed quantitatively for four infaunal bivalve species on the intertidal flat of the coastal area of northwestern Shikoku, Japan. The results show that the mode of preservation of empty shells in the early process of fossilization differs greatly from species to species and/or area to area. The degree of taphonomic loss is low in deep burrowing species inhabiting muddy substrates, and the spatial and density distributions and size-frequency data of living populations are well preserved in the articulated empty shell assemblages. In contrast, dispersion of empty shells outside the habitat occurs frequently in the shallow infauna within coarser substrates. This work suggests that articulated fossil shell assemblages of deep burrowing bivalves are probably autochtonous at the population level, and that they may be most useful for detailed palaeoecological and palaeoenvironmental analyses.