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Studies on body size-density relationships in animal communities

动物群落体型与密度关系的研究

基本信息

批准号：
14340246
负责人：
TOKESHI Mutsunori
金额：
$ 4.61万
依托单位：
KYUSHU UNIVERCITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14340246/
关键词：
body size-density relationships species-abundance relationships

项目摘要

1. Body size-density relationships and species-abundance relationships were studied involving theoretical an empirical analyses, mainly using data on animal communities.2. The neutral theory of biodiversity was examined from theoretical and conceptual points of view and some issues were raised about its applicability to biodiversity studies.3. Body size-density relationships and species-abundance relationships were analyzed with data on stream benthic assemblages from central Europe and the UK. Species-rich stream communities displayed size-scaling relationships that were mediated by resource fragmentation processes. An attempt was made to derive an extension of the allometric and metabolic scaling theory by integrating resource fragmentation mechanisms. The result is a fractal-like size-distribution of resources, as a function of body size that explains observed energetic scaling relationships.4. The effects of habitat complexity on benthic assemblages were experimentally analyzed. Species abundance patterns observed at different times of year showed little systematic variation with levels of habitat complexity but largely followed the patterns expected from, or lying in between, the Random Assortment model and the Random Fraction model.5. Patterns of species/abundance-area relationships were experimentally investigated in a stone-associated molluscan community on a subtropical boulder shore. The study demonstrated the significance of scale variance/invariance in species/abundance-area relationships even within relatively small spatial scales of habitat.

1.主要利用动物群落的数据，从理论和实证两个方面研究了个体大小-密度关系和物种-多度关系.从理论和概念两个方面对生物多样性中性理论进行了分析，并提出了生物多样性中性理论在生物多样性研究中的适用性问题.从中欧和英国的流底栖生物组合的数据进行了分析，身体大小的密度关系和物种丰度的关系。物种丰富的流社区显示大小的比例关系，介导的资源碎片化过程。试图通过整合资源碎片化机制来扩展异速生长和代谢比例理论。其结果是一个类似分形的大小分布的资源，作为身体大小的函数，解释了观察到的充满活力的缩放关系。实验分析了生境复杂性对底栖动物群落的影响。在一年的不同时间观察到的物种多度模式显示，生境复杂性水平的系统变化很小，但在很大程度上遵循预期的模式，或躺在之间，随机分类模型和随机分数模型。在亚热带卵石海岸的一个与石头相关的软体动物群落中，对物种/丰度-面积关系的格局进行了实验研究。该研究表明，即使在相对较小的空间尺度的栖息地的物种/丰度-面积关系的规模变化/不变性的意义。