Micro-arthropod colonization of litter in arboreal and soil environments of a Japanese cedar(Cryptomeria japonica) plantation
Micro-arthropod colonization of litter in arboreal and soil environments of a Japanese cedar(Cryptomeria japonica) plantation
复制标题
日本雪松（Cryptomeria japonica）人工林的树木和土壤环境中凋落物的微节肢动物定殖
DOI：
10.1007/s10310-010-0205-x
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发表时间：
2011
影响因子：
1.5
通讯作者：
N.
中科院分区：
文献类型：
--
作者：
Yoshida;T.;Hijii;N.
我们使用落叶袋和树皮凋落物袋来研究微型节肢动物在日本柳杉人工林的树栖和土壤微生境中的定殖模式。树木环境中的凋落物质量损失比土壤环境中的要慢。随着土壤分解的增加，凋落物袋之间的落叶质量变化显着增加，而在树栖环境中则较小。微型节肢动物的定植过程在树栖和土壤落叶袋中是不同的。在树袋中，弹尾目、弓目目和前目目在建袋后的第二年夏季达到峰值密度，而弓目目在15个月之前保持相对恒定的密度。在土袋中，弹尾目首先在垃圾中定居，而伽玛斯达和前柱目随后在更腐烂的垃圾中定居。主要微型节肢动物的垂直定殖模式在树干的所有高度上都是一致的。树木凋落物中的缓慢分解反映了整个实验研究中大多数分解者所处的严峻条件。相比之下，严酷的树栖凋落物条件可能会为有限的微型节肢动物带来相对稳定的资源，这些微型节肢动物对不利条件具有生理耐受性。由于这些动物群的特征，树栖凋落物可能会被弹尾目和弓目目季节性利用，但会被奥利巴目目持续利用。我们认为，土壤微型节肢动物更容易受到演替变化的影响，而不是季节变化的影响，因为凋落物的分解速度更快，而树栖微型节肢动物更容易受到季节变化的影响，因为树栖环境中的分解过程缓慢。
We used leaf-litter and bark-litter bags to examine the colonization patterns of microarthropods in arboreal and soil microhabitats of aCryptomeria japonicaplantation. The mass loss of leaf-litter was slower in the arboreal environment than in the soil environment. The variation in leaf-litter mass among litter bags increased markedly with increasing decomposition in the soil, and was smaller in the arboreal environment. The colonization processes of microarthropods differed between the arboreal and soil leaf-litter bags. In the arboreal bags, Collembola, Gamasida, and Prostigmata had a peak density in the summer of the second year after establishing the bags whereas Oribatida maintained relatively constant densities until 15 months. In the soil bags, Collembola colonized the litter first, and Gamasida and Prostigmata subsequently colonized the more decomposed litter. The vertical colonization patterns of the major microarthropods were consistent at all heights on the tree trunk. Slow decomposition in arboreal litter reflected severe conditions for most decomposers throughout the experimental study. In contrast, severe conditions of arboreal litter may lead to a relatively stable resource for limited microarthropods that have physiological tolerance for unfavorable conditions. Because of the traits of these fauna, the arboreal litter may thus be utilized seasonally by Collembola and Gamasida, but continuously by Oribatida. We suggest that soil microarthropods would be more affected by successional changes than by seasonal changes, because of faster decomposition of the litter, whereas arboreal microarthropods would be more affected by seasonal changes because of slow decomposition processes in the arboreal environment.