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首页> 外文期刊>Journal of Insect Conservation >Introduced and native ground beetle assemblages (Coleoptera: Carabidae) along a successional gradient in an urban landscape
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Introduced and native ground beetle assemblages (Coleoptera: Carabidae) along a successional gradient in an urban landscape

机译：沿城市景观沿梯度逐渐引入和原生的地面甲虫组合（鞘翅目：甲科）

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摘要

According to the intermediate disturbance hypothesis (IDH), species diversity should be higher at sites with intermediate levels of disturbance. We tested this hypothesis using ground beetles (Coleoptera: Carabidae) collected in pitfall traps from sites that varied in time since last disturbance. This successional gradient was embedded in an urban landscape near Montreal, Quebec. We predicted that diversity in young forests and old fields would be higher than in agricultural fields and old forests. Fifty-five species (2932 individuals) were found in 2003 and 46 species (2207 individuals) in 2004. In both years, species richness was highest from traps placed in agricultural fields. We collected nine introduced species; these had higher catch rates than the native species in both years (64.8% of total catch). When introduced species were removed from the Nonmetric Multidimensional Scaling ordination analysis, the assemblages from agricultural fields were less distinct compared to those of the other habitats, suggesting the introduced fauna is important in structuring carabid assemblages from the agricultural fields. Introduced species may play a significant role in the community composition of ground beetles in urban landscapes, and their influence may be the cause of the lack of support found for the IDH.
机译：根据中间干扰假设（IDH），在具有中等干扰水平的地点，物种多样性应更高。我们使用自从上次干扰以来时间变化的地点收集在陷阱陷阱中的地面甲虫（鞘翅目：甲虫）检验了这一假设。该连续梯度被嵌入魁北克蒙特利尔附近的城市景观中。我们预测，年轻的森林和旧的田野中的多样性将高于农业的田地和旧的林中。 2003年发现了55种（2932个个体），2004年发现了46种（2207个个体）。在这两年中，通过放置在农田中的诱集装置，物种丰富度最高。我们收集了九种引进物种。这两个年度的捕捞率均高于本地物种（占总捕捞量的64.8％）。当从非度量多维标度排序分析中删除引入的物种时，与其他生境相比，来自农田的组合没有那么明显，这表明引入的动物群在构建来自农田的带钩组合方面很重要。引入的物种可能在城市景观中地面甲虫的社区组成中发挥重要作用，其影响可能是缺乏对IDH支持的原因。

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