I’m not like everybody else: urbanization factors shaping spatial distribution of native and invasive ants are species-specific
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- 作者：Jérôme M. W. Gippet ; Nathalie Mondy ; Julita Diallo-Dudek ; Arnaud Bellec…
- 关键词：Urbanization ; Global change ; Species distribution ; Biological invasions ; Formicidae ; Lasius neglectus
- 刊名：Urban Ecosystems
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：20
- 期：1
- 页码：157-169
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Urban Ecology; Environmental Management; Ecology; Nature Conservation;
- 出版者：Springer US
- ISSN：1573-1642
- 卷排序：20
文摘
Urbanization is a major global change inducing complex and multiple modifications of landscapes and ecosystems. The spatial distributions of organisms experiencing these modifications will likely shift specifically, depending on each species’ response to each environmental modification induced by urbanization. We sampled two ant genera (Lasius and Tetramorium) at 1248 locations along an urbanization gradient in Lyon, France and used high resolution spatial layers for 18 spatial (e.g., open habitat fragmentation, bioclimatic data and surface temperatures) and temporal (e.g., comparison of Normalized Difference Vegetation Index between 1986 and 2015) environmental variables associated with urbanization. Coupling two different analytical methods (Outlying Mean Index and Boosted Regression Trees), we showed that each species’ distribution was influenced by its own combination of environmental factors. Two morphologically cryptic Tetramorium species (T. sp.E and T. sp.U2) were both highly abundant but with opposite responses to urbanization: while T. sp.E was favored by urbanized habitat, T. sp.U2 avoided urbanized areas. Among Lasius species, we detected 63 occurrences of the invasive ant Lasius neglectus, the distribution of which was favored only by embankments along roads. We found that, even at this reduced spatial scale, climatic effects influenced most species and interacted with urbanization factors.