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Drastic loss of insects (Lepidoptera: Geometridae) in urban landscapes in a tropical biodiversity hotspot
Journal of Insect Conservation ( IF 1.9 ) Pub Date : 2021-03-27 , DOI: 10.1007/s10841-021-00308-9
Fernando P. Gaona , Carlos Iñiguez-Armijos , Gunnar Brehm , Konrad Fiedler , Carlos Iván Espinosa

Accelerating urbanization of natural areasis a particularly important threat to biodiversity in tropical countries. Understanding how this phenomenon affects different groups of the fauna is essential to develop conservation actions We evaluate the effects of urbanization on species diversity and composition of geometrid moths in a tropical biodiversity hotspot in southern Ecuador. Moths were collected at different land-use types: forest, forest-pasture, pasture, and urban. We collected a total of 3064 moths representing 299 morphospecies. Species richness of geometrid moths decreased drastically in the more urbanized areas and moth communities differed strongly in composition between the investigated habitats. Community composition was mainly affected by floristic composition and degree of urbanization. Beta diversity components between land-use types depend on the degree of disturbance, with turnover among communities dominant in initial transitions and nestedness prevailing at later stages of transitions. In summary, moth assemblages in this tropical biodiversity hotspot are not only severely impoverished due to urbanization, but the remaining assemblages are strongly different from those found in natural ecosystems. Implications for insect conservation. To mitigate negative effects we recommend a more cautious development of urbanized areas in the region through the creation of more green space within the city, mainly with high diversity of native plants which can serve as potential hosts for caterpillars of moths and multiple other insects.



中文翻译:

热带生物多样性热点地区城市景观中昆虫的大量灭绝(鳞翅目:尺蛾科)

加快自然地区的城市化进程是对热带国家生物多样性的特别重要的威胁。了解这种现象如何影响不同的动物群对于开展保护行动至关重要。我们评估厄瓜多尔南部热带生物多样性热点地区的城市化对物种多样性和几何蛾的组成的影响。蛾类是在不同的土地利用类型上收集的:森林,森林牧草,牧场和城市。我们总共收集了3064个代表299个形态物种的飞蛾。在城市化程度更高的地区,几何蛾的物种丰富度急剧下降,在调查的生境之间,蛾类群落的组成差异很大。群落组成主要受植物组成和城市化程度的影响。土地利用类型之间的Beta多样性成分取决于扰动的程度,社区之间的周转在最初的过渡中占主导地位,而嵌套性在过渡的后期占主导地位。总之,在这个热带生物多样性热点中,蛾类组合不仅由于城市化而严重贫困,而且其余组合与自然生态系统中的组合大不相同。对昆虫保护的意义。为了减轻负面影响,我们建议通过在城市中创建更多的绿色空间来更加谨慎地发展该地区的城市化地区,主要是采用高度多样性的本地植物作为飞蛾和其他多种昆虫的潜在寄主。在最初的过渡时期占主导地位的社区的人员流动,而在过渡的后期占据主导地位的是巢穴。总之,在这个热带生物多样性热点中,蛾类组合不仅由于城市化而严重贫困,而且其余组合与自然生态系统中的组合大不相同。对昆虫保护的意义。为了减轻负面影响,我们建议通过在城市中创建更多的绿色空间来更加谨慎地发展该地区的城市化地区,主要是采用高度多样性的本地植物作为飞蛾和其他多种昆虫的潜在寄主。在最初的过渡期占主导地位的社区的人员流动,在过渡期的后期占主导地位的是巢穴。总之,在这个热带生物多样性热点中,蛾类组合不仅由于城市化而严重贫困,而且其余组合与自然生态系统中的组合大不相同。对昆虫保护的意义。为了减轻负面影响,我们建议通过在城市中创建更多的绿色空间来更加谨慎地发展该地区的城市化地区,主要是采用高度多样性的本地植物作为飞蛾和其他多种昆虫的潜在寄主。但是其余的组合与自然生态系统中的组合有很大不同。对昆虫保护的意义。为了减轻负面影响,我们建议通过在城市中创建更多的绿色空间来更加谨慎地发展该地区的城市化地区,主要是采用高度多样性的本地植物作为飞蛾和其他多种昆虫的潜在寄主。但是其余的组合与自然生态系统中的组合有很大不同。对昆虫保护的意义。为了减轻负面影响,我们建议通过在城市中创建更多的绿色空间来更加谨慎地发展该地区的城市化地区,主要是采用高度多样性的本地植物作为寄居蛾和其他多种昆虫的潜在寄主。

更新日期:2021-03-27
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