Size-frequency distribution of living populations and dead shell assemblages in a marine intertidal sand snail Umbonium (Suchium) moniliferum (Lamarck), and their palaeoecological significance
Size-frequency distribution of living populations and dead shell assemblages in a marine intertidal sand snail Umbonium (Suchium) moniliferum (Lamarck), and their palaeoecological significance
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DOI：
10.1016/0031-0182(85)90060-4
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发表时间：
1985-04
期刊：
影响因子：
--
通讯作者：
S. Shimoyama
中科院分区：
文献类型：
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作者：
S. Shimoyama
本文对日本西九州北方津崎市一个小海湾内的念珠石螺（Umbonium（Suchium）moniliferum（Lamarck））的活壳和死壳样品的大小-频率分布进行了每月一次的分析，以获得关于种群增长、死壳产生和壳组合的主要大小-频率分布的死后变化的定量数据。特定尺寸的生存曲线很好地反映了种群结构，因此，给出了一个关于死壳的尺寸频率的想法。在本研究中，来自不同位置的死壳的尺寸-频率分布通常显示未修改的初级模式。然而，它往往被修改，由于大小选择性运输电流，特别是两个pagrid物种的寄居蟹。作为古生态学应用的一个实例，本文还研究了美国U.（S.）本文将来自北方九州福冈市全新世贝壳层的念珠藻与来自生活人口的数据进行了比较。结果表明，在壳化石组合的情况下，在最终埋藏之前，尺寸频率分布的主要模式已被显著修改。这可能是由于寄居蟹对死壳的大小选择性运输造成的。
Size-frequency distribution of living and dead shell samples ofUmbonium (Suchium) moniliferum(Lamarck) in a small inlet in Tsuyazaki, Northern Kyushu, West Japan, have been analysed monthly to obtain quantitative data on the growth of a population, production of dead shells and post-mortem modification of the primary size-frequency distribution of the shell assemblage. Size-specific survivorship curves reflect the population structure well and, therefore, give an idea about the size-frequency of dead shells. The size-frequency distribution of dead shells from various locations in the present study usually shows the unmodified primary patterns. However, it tends to be modified owing to size-selective transportation by currents and, especially, by two pagrid species of hermit crabs. As an example of palaeoecological application, the size-frequency distribution of the fossil shell assemblage ofU. (S.) moniliferumfrom the Holocene shell bed in Fukuoka City, Northern Kyushu was compared with data from the living population. The result shows that the primary patterns of the size-frequency distribution have been modified significantly before final burial in the case of the fossil shell assemblage. This was probably caused by the size-selective transportation of dead shells by hermit crabs.