Biotic and Abiotic Factors Affecting the Structures of Ground Invertebrate Communities in Japanese Cedar Dominant Forests
Biotic and Abiotic Factors Affecting the Structures of Ground Invertebrate Communities in Japanese Cedar Dominant Forests
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影响日本雪松优势林地面无脊椎动物群落结构的生物和非生物因素
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
K. Kubota
中科院分区：
文献类型：
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作者：
H. Ikeda;Kosuke Homma;K. Kubota
对日本佐渡岛雪松优势林的地面无脊椎动物群落结构、森林结构与非生物和林地生物因子的关系进行了研究。选择了3个原始林(1个雪松原始林和2个针阔混交林)和3个人工林进行了研究。原始林中的无脊椎动物群落多样性高于人工林。与人工林相比，原始林具有更大的坡度、更高的土壤水分含量、更高的光量子通量密度和冠层开度，以及更薄的枯枝落叶层。无脊椎动物群落的结构与坡度、海拔、光照条件、枯枝落叶层深度和林下物种组成密切相关。特别是，光照条件和林下物种组成对无脊椎动物群落结构有很大的影响。地面无脊椎动物群落的结构似乎通过林地小气候间接受到光照条件的影响。林下物种似乎为无脊椎动物提供了食物资源，充分保护了它们免受极端小气候的侵袭，并为它们提供了躲避捕食者的庇护所。其中一个人工林中的地面无脊椎动物群落与原始林中的群落相对相似，因为它经过定期管理，具有相似的森林结构和光照条件，与其他人工林相比，它位于更接近一些原始林的位置。因此，这支持了光照条件和林下物种组成的差异是影响原始林和人工林无脊椎动物群落多样性的主要因素的假说。
The relationships between the structures of ground invertebrate communities, forest structure, and abiotic and forest floor biotic factors in cedar dominant forests (Cryptomeriajaponica) on Sado island, Japan were investigated. Three primary forests (one primary pure cedar forest and two primary coniferous-broadleaved mixed forests) and three plantation forests were chosen for this study. The diversity of invertebrate communities in the primary forests was higher than in the plantation forests. The primary forests also had a steeper slope angle, higher soil water content, higher photon flux density and canopy openness, and a thinner litter layer than the plantation forests. The structures of invertebrate communities strongly correlate with slope angle, elevation, light conditions, litter layer depth, and understory species composition. In particular, light conditions and understory species composition were revealed as having a strong influence on the structures of invertebrate communities. The structures of ground invertebrate communities seem to be indirectly affected by light conditions through forest floor microclimates. Understory species seem to provide invertebrates with a food resource, sufficient protection against extreme microclimates and shelter from predators. The ground invertebrate community in one of the plantation forests was relatively similar to that in the primary forests, because as it has been managed regularly, it has a similar forest structure and light conditions, and is situated closer to some primary forests compared to the other plantation forests. Thus, this supports the hypothesis that differences in light conditions and understory species composition are the main factors affecting the diversity of invertebrate communities in primary and plantation forests.