Density, biomass, and guild structure of arboreal arthropods as related to their inhabited tree size in aCryptomeria japonica plantation
Density, biomass, and guild structure of arboreal arthropods as related to their inhabited tree size in aCryptomeria japonica plantation
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柳杉人工林中树栖节肢动物的密度、生物量和行会结构与其栖息树木大小的关系
DOI：
10.1007/bf02347014
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发表时间：
1986
影响因子：
2
通讯作者：
N. Hijii
中科院分区：
文献类型：
--
作者：
N. Hijii
采用烟熏法对一个15年树龄的日本柳杉人工林的树栖节肢动物进行了露天和布袋覆盖的封闭条件下的调查。单株采集量为8200 ~ 14000，生物量为340 ~ 1700mg d.wt。弹虫目和刺虫目以数量为主，双足目、弹虫目和蜘蛛目生物量占比较大。大约60-70%的个体在公开熏蒸后两小时内下降。所有动物的总个体数和生物量与其宿主树的大小（净长时的茎直径，DB）之间的幂型回归表明，它们与db2近似成正比。食腐动物行会和游客行会的数量、生物量和树木大小之间的相关性最显著。弹尾目、双翅目和蜘蛛目昆虫的数量和生物量与树的大小有显著的相关性。根据这些回归，估计所有节肢动物单位地面面积的个体数和生物量分别为3755/m2和165.87 mg d.wt。/平方米,分别。食饵和捕食者的数量与生物量呈幂型回归关系。随着树高的增加，所有捕食者与所有猎物的数量和生物量之比呈下降趋势。膜翅目幼虫与鳞翅目幼虫的寄生性比例也有类似的趋势，而蜘蛛目幼虫与线虫幼虫的寄生性比例几乎不变，与树的大小无关。
Arboreal arthropods in a 15-year-old plantation ofCryptomeria japonica were surveyed using the smoking method under open conditions and also in the enclosed condition in which the whole above-ground part of a tree was covered by a cloth bag. Per tree, the number of individuals collected was 8200–14000, with a biomass of 340–1700 mg d.wt. Collembola and Acarina were major components in number, while Diplopoda, Collembola, and Araneae occupied the larger part of the biomass. About 60–70% of total numbers of individuals dropped within two hours after the open fumigation. Clear power-form regressions between total numbers of individuals and biomasses of all animals and their host tree size (stem diameter at clear length,DB) showed they were approximately proportional toDB2. The guilds of scavengers and tourists demonstrated the most significant correlations between their numbers and biomasses and the tree size. Numbers and biomasses of Collembola, Diptera, and Araneae revealed remarkable dependence on the tree size. From these regressions, numbers of individuals and biomasses per unit ground area were estimated for all arthropods to be 3755/m2 and 165.87 mg d.wt./m2, respectively. Power-form regressions were observed between numbers and biomasses of prey and predators. The number-and biomass ratios of all predators to all prey tended to decrease with increasing tree size. A similar trend was observed in the corresponding ratios of parasitic Hymenoptera to lepidopteran larvae, while those of Araneae to Collembola were almost constant, irrespective of tree size.