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首页> 美国卫生研究院文献>Journal of Insect Science >The Role of Small Woodland Remnants on Ground Dwelling Insect Conservation in Chaco Serrano Central Argentina
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The Role of Small Woodland Remnants on Ground Dwelling Insect Conservation in Chaco Serrano Central Argentina

机译：小林地残留物在阿根廷中部查科塞拉诺的地面住宅昆虫保护中的作用

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摘要

Many terrestrial ecosystems are changing due to extensive land use and habitat fragmentation, posing a major threat to biodiversity. In this study, the effects of patch size, isolation, and edge/interior localization on the ground dwelling insect communities in the Chaco Serrano woodland remnants in central Argentina were examined. Sampling was carried out in December 2003 and March 2004 in nine remnants (0.57 to 1000 hectares) using pitfall traps. In total, 7071 individuals representing 12 orders and 79 families were recorded. The taxonomic composition of these communities was linked to remnant size. Insect abundance increased (as did their richness, albeit marginally) as remnant area decreased, with no significant effects of isolation or edge/interior localization on abundance, richness, or diversity. No differential area effects were observed when abundance and richness of predators, scavengers, and herbivores were compared. Thus, ground insect communities in fragmented Chaco Serrano seem to respond mainly to patch level, rather than to within-patch (edge effects) or landscape (isolation) level variables. These results suggest that small Chaco Serrano remnants, by supporting larger ground-dwelling insect assemblages, may play an important role from a conservation viewpoint.
机译：由于大量土地利用和生境破碎化，许多陆地生态系统正在发生变化，这对生物多样性构成了重大威胁。在这项研究中，研究了斑块大小，隔离度和边缘/内部定位对阿根廷中部Chaco Serrano林地残余物中地面昆虫群落的影响。在2003年12月和2004年3月使用陷阱陷阱对9个残余物（0.57至1000公顷）进行了采样。总共记录了7071个人，代表12个订单和79个家庭。这些社区的分类学组成与剩余规模有关。昆虫的丰度随着残留面积的减少而增加（尽管其丰度也有所增加），但隔离或边缘/内部定位对丰度，丰富度或多样性没有明显影响。比较捕食者，清除剂和草食动物的丰富度和丰富度时，未观察到面积差异。因此，支离破碎的查科塞拉诺地区的地面昆虫群落似乎主要对斑块水平做出反应，而不是对斑块内（边缘效应）或景观（隔离）水平变量做出反应。这些结果表明，从保护角度看，小的Chaco Serrano残留物通过支持较大的地面昆虫聚集体可能发挥重要作用。

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