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Relationships between resource dynamics associated with the spatial structure of forests and arthropod communities in the canopy and soil strata in relation to ecosystem functioning in forests

与森林空间结构和冠层节肢动物群落以及土壤层相关的资源动态与森林生态系统功能之间的关系

基本信息

批准号：
17380091
负责人：
HIJII Naoki
金额：
$ 6.4万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

Spatiotemporal distribution and the life cycles of arboreal collembolans were investigated in the canopy and soil litter of a Cryptomeria japonica plantation. Six arboreal collembolans were extracted from the canopy litter. From the results of the seasonal changes in the densities and the life cycles of the collembolans, they were divided into two groups : species collected from both the canopy and soil litter, and species only collected from the canopy litter. The vertical and seasonal distributions indicated that the arboreal collembolans had species-specific spatiotemporal patterns. The size distributions of three dominant species suggest that they had different age structures that change differently in response to the vertical structure of the forest. Thus, spatiotemporal patterns of litter and microarthropod commnities in the canopy and soil indicated that the communities would use effectively vertical structure of the forest by having a strategy for the microclimatic conditions i … More n the forest.We also examined how the structural traits of diverse habitats in forests can affect structure and diversity of arthropod communities at the whole-forest scale in a subtropical forest, Japan. We investigated a system comprising bird's nest ferns (Asplenium nidus complex), which hold large amounts of litter inside, and oribatid mites, and focused on the patterns and mechanisms which can sustain oribatid diversity. The number of oribatid species estimated for a hypothetical stand with no fern was about 180 species from 80 samples ; this value did not differ significantly from that in another hypothetical stand with ferns (190 species). Thus, the species richness of oribatid communities estimated for the whole forest was not affected by the presence/absence of the ferns. However, because there were several oribatid species specific to bird's nest ferns, the existence of the ferns may enable diverse organisms to coexist and may enhance the whole biodiversity in this subtropical forest. Less

对柳杉种植园冠层和凋落物中树栖跳虫的时空分布和生活史进行了研究。从林冠凋落物中提取了六种树栖跳虫。根据弹尾虫密度和生活史的季节变化，将弹尾虫分为两大类：一类是同时采集于林冠和土壤凋落物中的弹尾虫，另一类是仅采集于林冠凋落物中的弹尾虫。垂直分布和季节分布表明，树栖跳虫具有种特异性的时空格局。三个优势种的大小分布表明，他们有不同的年龄结构的变化不同的响应森林的垂直结构。因此，凋落物和小型节肢动物群落在林冠和土壤中的时空格局表明，群落通过对小气候条件的策略，可以有效地利用森林的垂直结构， ...更多信息在森林中，我们还研究了如何在森林中的不同生境的结构特征可以影响节肢动物群落的结构和多样性在整个森林尺度在亚热带森林，日本。我们调查了一个系统，包括鸟巢蕨类植物（Asplenium nidus复杂），其中持有大量的垃圾内，甲螨，并专注于模式和机制，可以维持甲螨的多样性。在80个样本中，没有蕨类植物的假设林分中甲螨的物种数估计为180种左右;这个值与另一个假设的蕨类植物林分中甲螨的物种数（190种）没有显著差异。因此，甲螨群落的物种丰富度估计为整个森林没有受到影响的存在/不存在的蕨类植物。然而，由于有几个甲螨物种特有的鸟巢蕨类植物，蕨类植物的存在可能会使不同的生物共存，并可能提高整个亚热带森林的生物多样性。少