Ecosystem process rate increases with animal species richness: evidence from leaf-eating, aquatic insects
Ecosystem process rate increases with animal species richness: evidence from leaf-eating, aquatic insects
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DOI：
10.1034/j.1600-0706.2000.890311.x
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发表时间：
2000-06-01
期刊：
影响因子：
3.4
通讯作者：
Malmqvist, B
中科院分区：
文献类型：
--
作者：
Jonsson, M;Malmqvist, B
在一项实验室实验中，使用食叶昆虫（三种翅翅目昆虫）作为食碎物，估计了物种数量和特性对凋落物分解率的影响。我们在单物种实验中发现不同物种在这一过程上存在显着差异；但当考虑到动物生物量时则不然。当物种组合时，物种同一性的影响大大降低并变得微不足道，而物种数量则具有显着影响。这表明，即使所有物种属于同一行会，生态系统过程的速率也可能受益于物种丰富度，这与预测行会内冗余的假设相反。物种之间的促进和负相互作用（其中种内相互作用大于种间相互作用）是两种潜在机制，可以解释随着物种丰富度而增加的分解率。
Effects of species number and identity on the breakdown rate of leaf litter were estimated in a laboratory experiment using leaf-eating insects, three species of Plecoptera, as detritivores. We found significant differences between the different species on this process in single-species experiment; but not when animal biomass was accounted for. When species were combined the effect of species identity was strongly reduced and rendered insignificant, whereas the number of species had a significant effect. This shows that rates of ecosystem processes may benefit from species richness even when all species belong to the same guild, which is in contrast to hypotheses predicting redundancy within guilds. Facilitation between species and negative interactions, where intraspecific interactions are greater than interspecific interactions, are two potential mechanisms which could explain increasing decomposition rates with species richness.