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首页> 外文期刊>Australian Forestry >Epigaeic beetle communities of the Green Triangle plantation landscape, southern Australia: effect of remnant size, vegetation quality and structural complexity
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Epigaeic beetle communities of the Green Triangle plantation landscape, southern Australia: effect of remnant size, vegetation quality and structural complexity

机译：澳大利亚南部绿色三角形人工林景观的甲虫群落：残余大小，植被质量和结构复杂性的影响

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Across the Green Triangle plantation landscape of south-eastern South Australia and south-western Victoria there remain remnant patches of native vegetation which vary considerably in both size and vegetation quality. This study focused on how the vegetation quality and or size of remnants embedded within the bluegum (Eucalyptus globulus) plantation landscape influence the local ground-dwelling Coleoptera (beetle) assemblages found within them. The aim was to particularise those remnant characteristics (in terms of size and vegetation quality) that are likely to result in the most effective protective management of local remnant beetle biodiversity. Pitfall sampling was carried out over a 13-month period. All beetles sampled via pitfall traps were identified to family level, and the three most abundant beetle families (Carabidae, Staphylinidae and Tenebrionidae) identified to genus. Remnant vegetation was assigned to one of the four quality categories (as defined by the Land for Wildlife (LFW) method), and structural attributes of the vegetation surrounding each trap were also measured.Different beetle taxa responded independently to remnant vegetation quality and size, and to the measured vegetation structural variables. Mean beetle family abundance and estimated richness increased with decreasing remnant vegetation quality. However, when Carabidae, Staphylinidae and Tenebrionidae beetle families were analysed separately at genus level, taxa responded independently to vegetation quality and size. Furthermore, different vegetation structural variables such as the percentage cover of litter and shrubs as well as the number of overstorey stems were correlated with estimated richness of different beetle taxa. Beetle abundance was significantly influenced by mean litter depth and shrub and litter cover. This study also showed that remnants of different vegetation quality supported beetle assemblages composed of significantly different communities. However, these differences were not consistent between all sites of different vegetation quality, suggesting that there may be additional ecological characteristics within the landscape responsible for shaping remnant beetle communities. No single, specific quality of remnant vegetation was optimal for supporting the most diverse assemblage of beetles, as different taxa responded independently. A range of remnants of differing qualities maintained across the landscape may provide the resources needed for the widest range of beetle taxa, by accommodating their varying habitat requirements.
机译：在南澳大利亚州东南部和维多利亚州西南部的绿色三角种植园景观中，仍然残留有原生植被，其面积和植被质量差异很大。这项研究的重点是蓝桉（Eucalyptus globulus）种植园景观中埋藏的植被质量和/或残留物大小如何影响其中发现的当地陆栖鞘翅目（甲壳虫）组合。目的是具体说明那些可能导致对当地残留甲虫生物多样性进行最有效保护管理的残留特征（就大小和植被质量而言）。陷阱取样进行了13个月。通过陷阱陷阱采样的所有甲虫均被鉴定到家族水平，并且鉴定出三个最丰富的甲虫家族（甲壳纲，葡萄球菌和天蛾科）。残余植被被划分为四个质量类别之一（由野生动物土地（LFW）方法定义），并且还测量了每个陷阱周围的植被的结构属性。不同的甲虫类群对残余植被的质量和大小有独立的响应，以及测得的植被结构变量。随着剩余植被质量的降低，平均甲虫家庭的丰度和估计的丰富度增加。但是，当在属水平上分别对Carabidae，Staphylinidae和Tenebrionidae甲虫科进行分析时，分类单元对植被质量和大小的响应是独立的。此外，不同的植被结构变量，如凋落物和灌木的覆盖率以及过高的茎数与估计的不同甲虫类群的丰富度相关。甲虫的丰度受平均垫料深度，灌木和垫料覆盖率的显着影响。这项研究还表明，不同植被质量的残留物支持由明显不同的群落组成的甲虫组合。但是，这些差异在具有不同植被质量的所有地点之间并不总是一致的，这表明景观中可能存在其他生态特征，这些生态特征负责塑造残留的甲虫群落。没有任何一种特定的残留植被质量能够最佳地支持甲虫的最多样化组合，因为不同的分类单元是独立响应的。在整个景观中保留的一系列不同品质的残余物，可以通过适应其不同的栖息地需求，提供最广泛的甲虫类群所需的资源。

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