Bultman Thomas L, Uetz George W
Department of Biological Sciences, University of Cincinnati, 45221, Cincinnati, Ohio, USA.
Oecologia. 1982 Oct;55(1):34-41. doi: 10.1007/BF00386715.
We conducted a field manipulation of forest litter to determine effects of litter structure (flat vs curly leaves) on forest floor spiders in natural and artificial leaf litter. Artificial litter made of vinyl, was nondecomposable and non-nutritive. In this way, we separated interactions of effects of litter as a nutritional base and as a spatially heterogeneous environment on litter-dwelling spiders.Structural complexity of litter significantly affected abundances of some forest floor spiders. In particular, abundances of web-building spiders were lower in treatments of flat leaves. Litter nutritional content and structural complexity only slightly affected spider species composition and richness. Results suggest that litter depth is more influential than are litter structural complexity or nutritional content, in organizing forest floor spider communities.
我们对森林凋落物进行了实地操控，以确定凋落物结构（平叶与卷曲叶）对天然和人工落叶层中森林地面蜘蛛的影响。由乙烯基制成的人工凋落物不可分解且无营养。通过这种方式，我们区分了凋落物作为营养基础以及作为空间异质环境对栖息在凋落物中的蜘蛛的影响的相互作用。凋落物的结构复杂性显著影响了一些森林地面蜘蛛的数量。特别是，在平叶处理中，结网蜘蛛的数量较少。凋落物的营养成分和结构复杂性对蜘蛛物种组成和丰富度的影响较小。结果表明，在构建森林地面蜘蛛群落方面，凋落物深度比凋落物结构复杂性或营养成分更具影响力。
