Does urbanization decrease diversity in ground beetle (Carabidae) assemblages?
Does urbanization decrease diversity in ground beetle (Carabidae) assemblages?
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DOI：
10.1111/j.1466-8238.2009.00499.x
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发表时间：
2010-01-01
影响因子：
6.4
通讯作者：
Tothmeresz, Bela
中科院分区：
文献类型：
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作者：
Magura, Tibor;Lovei, Gabor L.;Tothmeresz, Bela
目的通过比较地面甲虫(鞘翅目，步甲科)群落对城市化梯度的反应，来检验城市化对不同地点的生物多样性是否有相似的影响。我们还想看看城市化是否会对地面甲虫的种群产生同质化的影响。地点欧洲、加拿大和日本的9个森林覆盖的温带地区。方法使用了Globenet项目公布的结果。在所有地点，确定了三个阶段：(1)森林覆盖(农村)区域，(2)原始森林支离破碎的郊区，(3)城市公园中原始森林的残留物。这些栖息地形成了一个城市化系列。研究安排(诱捕器的数量和操作)和方法(诱捕器)是相同的，符合Globenet议定书。对群落组成和多样性格局进行了评价。多样性关系用Renyi多样性排序法进行分析，分别考虑了所有地面甲虫和森林专家物种。结果总体生物多样性(物种丰富度和多样性排序)在城市化强度和地理位置上表现出不一致的趋势。然而，当只比较森林物种时，原始农村(森林)地区的多样性高于城市森林片断。国家内部步甲群落的相似性总是高于城市化阶段内的相似性。主要结论城市化似乎不会导致地面甲虫多样性本身的下降。随着城市化的加剧，森林物种减少，但非森林物种的涌入掩盖了这一趋势。同一地点的农村区系与城市区系的相似性大于城市化阶段间的相似性，说明城市化并没有使所研究地点的甲虫区系的分类组成同质化。
AimWe wanted to test whether urbanization has similar effects on biodiversity in different locations, comparing the responses of ground beetle (Coleoptera, Carabidae) assemblages with an urbanization gradient. We also wanted to see if urbanization had a homogenizing effect on ground beetle assemblages.LocationsNine forested temperate locations in Europe, Canada and Japan.MethodsPublished results of the Globenet Project were used. At all locations, three stages were identified: (1) a forested (rural) area, (2) a suburban area where the original forest was fragmented and isolated, and (3) remnants of the original forest in urban parks. These habitats formed an urbanization series. Study arrangements (number and operation of traps) and methods (pitfall trapping) were identical, conforming to the Globenet protocol. Assemblage composition and diversity patterns were evaluated. Diversity relationships were analysed by the Renyi diversity ordering method considering all ground beetles and - separately - the forest specialist species. Taxonomic homogenization was examined by multivariate methods using assemblage similarities.ResultsOverall biodiversity (compared by species richness and diversity ordering) showed inconsistent trends by either urbanization intensity or by geographic position. However, when only forest species were compared, diversity was higher in the original rural (forested) areas than in urban forest fragments. Within-country similarities of carabid assemblages were always higher than within-urbanization stage similarities.Main conclusionsUrbanization does not appear to cause a decrease in ground beetle diversity per se. Forest species decline as urbanization intensifies but this trend is masked by an influx of non-forest species. The rural faunas were more similar to the urban ones within the same location than similar urbanization stages were to each other, indicating that urbanization did not homogenize the taxonomic composition of ground beetle faunas across the studied locations.