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Exotic pastureland is better than Eucalyptus monoculture: β-diversity responses of flower chafer beetles to Brazilian Atlantic Forest conversion
International Journal of Tropical Insect Science ( IF 1.1 ) Pub Date : 2020-06-13 , DOI: 10.1007/s42690-020-00186-9
César M. A. Correa , Pedro Giovâni da Silva , Anderson Puker , Henrique Louro Ad’Vincula

Human activities, such as conversion and degradation of habitats, are modifying the natural ecosystems, causing biodiversity declines globally. However, the responses of many understudied biological groups are less clear. Here, we explore how spatial components of β-diversity (incidence- and abundance-based) of flower chafer beetles are influenced by land use changes. We sampled the insects using aerial fruit-baited traps weekly from September to December 2012, in five sites of Brazilian Atlantic Forest, Eucalyptus plantations and pasturelands (Urochloa spp.). We find that compositional changes of beetle assemblages are completely represented by nestedness patterns, either among or within habitats. When accounting for abundance, except for Eucalyptus sites, there are a similar contribution of change and loss of individuals among and within habitats. Within Eucalyptus sites, assemblages are completely nested in terms of species and individuals. Eucalyptus sites are a poor-homogenized subset of some disturbance-tolerant flower chafer beetle species also found in forest and open habitats (such as pastures). When resources are available, these beetles can inhabit both forest and open habitats and appear to be ‘guests’ in Eucalyptus sites, using them only when moving through space. Finally, conversion of Atlantic Forest sites into Eucalyptus causes poor-homogenized assemblages of flower chafer beetles.

中文翻译:

异国情调的牧场优于单一栽培桉树:花金龟子对巴西大西洋森林转化的 β 多样性响应

栖息地的转变和退化等人类活动正在改变自然生态系统,导致全球生物多样性下降。然而,许多未充分研究的生物群体的反应不太清楚。在这里,我们探讨了金龟子的 β 多样性(基于发生率和丰度)的空间成分如何受土地利用变化的影响。从 2012 年 9 月到 12 月,我们每周在巴西大西洋森林、桉树种植园和牧场 (Urochloa spp.) 的五个地点使用空中诱饵诱捕器对昆虫进行采样。我们发现甲虫组合的组成变化完全由栖息地之间或栖息地内的嵌套模式表示。在考虑丰度时,除了桉树站点,栖息地之间和栖息地内的个体变化和丧失也有类似的贡献。在桉树站点内,组合在物种和个体方面完全嵌套。桉树栖息地是一些在森林和开放栖息地(如牧场)中发现的抗干扰花金龟子物种的同质化较差的子集。当资源可用时,这些甲虫可以栖息在森林和开阔的栖息地,并且似乎是桉树栖息地的“客人”,只有在空间移动时才会使用它们。最后,将大西洋森林地点转化为桉树会导致花金龟子甲虫的组合不均。桉树栖息地是一些在森林和开放栖息地(如牧场)中发现的抗干扰花金龟子物种的同质化较差的子集。当资源可用时,这些甲虫可以栖息在森林和开阔的栖息地,并且似乎是桉树栖息地的“客人”,只有在空间移动时才会使用它们。最后,将大西洋森林遗址转化为桉树会导致花金龟子甲虫的组合不均。桉树栖息地是一些在森林和开放栖息地(如牧场)中发现的抗干扰花金龟子物种的同质化较差的子集。当资源可用时,这些甲虫可以栖息在森林和开阔的栖息地,并且似乎是桉树栖息地的“客人”,只有在空间移动时才会使用它们。最后,将大西洋森林地点转化为桉树会导致花金龟子甲虫的组合不均。
更新日期:2020-06-13
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