Biondi Maurizio, D'Alessandro Paola, Iannella Mattia
Department of Life, Health & Environmental Sciences, University of L'Aquila, Via Vetoio-Coppito, 67100 L'Aquila, Italy.
Insects. 2023 Apr 18;14(4):394. doi: 10.3390/insects14040394.
The distribution of global biodiversity can be investigated based on comprehensive datasets and many methods to process them. The taxonomic diversity of phytophagous insects is typically linked to plant diversity, which increases from temperate to tropical latitudes. In this paper, we explored the latitudinal distribution of the flea beetle genera (Coleoptera, Chrysomelidae, Galerucinae, Alticini) on the African continent. We divided the area into latitudinal belts and looked for possible correlations with the number and types of vegetational divisions, the area of each belt, and the bioclimatic variables. The number of flea beetle genera is related to the number and types of vegetation divisions rather than the area of each belt. Some bioclimatic variables are highly related to the number of genera, which is higher within those belts where climate factors limit the oscillation of temperature over the year and favor high precipitations, especially in the warmest months. These biotic and abiotic factors lead to a two-peak trend in the taxonomic richness of flea beetle genera from north to south. Genera endemic to restricted areas are linked to the presence of high mountain systems and increase the taxonomic richness of the belt they belong to.
全球生物多样性的分布可以基于综合数据集以及许多处理这些数据集的方法进行研究。植食性昆虫的分类多样性通常与植物多样性相关，植物多样性从温带向热带纬度递增。在本文中，我们探究了非洲大陆上跳甲属（鞘翅目，叶甲科，萤叶甲亚科，跳甲族）的纬度分布。我们将该区域划分为纬度带，并寻找其与植被分区的数量和类型、每个带的面积以及生物气候变量之间的可能相关性。跳甲属的数量与植被分区的数量和类型有关，而非与每个带的面积有关。一些生物气候变量与属的数量高度相关，在那些气候因素限制全年温度波动且有利于高降水量（尤其是在最温暖月份）的地带，属的数量更高。这些生物和非生物因素导致跳甲属的分类丰富度从北到南呈现双峰趋势。分布于受限区域的特有属与高山系统的存在有关，并增加了它们所属地带的分类丰富度。
