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首页> 外文期刊>Journal of Insect Conservation >Grasshopper response to reductions in habitat area as mediated by subfamily classification and life history traits
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Grasshopper response to reductions in habitat area as mediated by subfamily classification and life history traits

机译：由亚科分类和生活史特征介导的蝗虫对栖息地面积减少的反应

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Although the loss of species is often attributed to reductions in habitat area, heterogeneity and connectivity, species specific traits and taxonomic relatedness can be important in explaining which species groups may be most impacted by the fragmentation process. In this study, using urban grassland fragments within the Front Range of northern Colorado, USA, we quantified the degree to which grasshopper species numbers declined with reductions in habitat area. We then examined the degree to which subfamily grouping (Gomphocerinae, Melanoplinae, Oedipodinae) and variation in life history characteristics (body size, dispersal ability, feeding preference and juvenile emergence time) explained which grasshopper species groups might be most impacted by reductions in habitat size. Our results showed a strong species-area relationship for grasshoppers across the urban fragments. Grasshoppers in different subfamily groupings were found to respond differentially, with the Melanoplinae being least affected by reductions in habitat area, while the other subfamilies responded similarly and lost species at a higher rate. Species with different feeding strategies were also found to respond differentially, with forbivorous species being least affected by the reductions in habitat area, while the graminivorous and herbivorous (mixed-feeders) responded similarly and lost species at a higher rate. As Melanoplinae tend to be forb feeders, this may partially explain why the subfamily was not as affected by the fragmentation process as the Gomphocerinae and Oedipodinae (who tend to be grass and mixed-feeders, respectively). Species that differed in body size and dispersal ability did not display differential responses to reductions in habitat area.
机译：尽管物种的丧失通常归因于栖息地面积，异质性和连通性的减少，但物种的特定性状和分类学相关性对于解释哪些物种组可能受到破碎过程的影响最为重要。在这项研究中，我们使用美国北科罗拉多州北部山脉以内的城市草地碎片，量化了蝗虫物种数量随栖息地面积减少而下降的程度。然后，我们研究了亚科分组（Gomphocerinae，Melanoplinae，Oedipodinae）的程度和生活史特征（体型，分散能力，进食偏好和幼年出现时间）的变化解释了哪种蚱hopper物种组可能会受到栖息地面积减少的影响最大。我们的结果表明，跨越城市碎片的蝗虫具有很强的物种/区域关系。研究发现，不同亚科的蚱respond的反应不同，其中黑猩猩受栖息地面积减少的影响最小，而其他亚科的反应相似，物种损失率更高。还发现采用不同进食策略的物种对反应的反应不同，栖息地减少对食性物种的影响最小，而食草性和草食性（混合食性）的响应相似，而丧失物种的发生率更高。由于黑猩猩通常是禁食者，这可能部分解释了为什么该亚科没有象Gomphocerinae和Oedipodinae（分别是草食者和混合食者）那样受到破碎过程的影响。体型和扩散能力不同的物种对栖息地面积的减少没有不同的反应。

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