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Temporal variation in ant community assemblages along a rural–urban gradient in the Yaoundé metropolis, Cameroon
Urban Ecosystems ( IF 2.5 ) Pub Date : 2021-07-12 , DOI: 10.1007/s11252-021-01143-1
Paul Serge Mbenoun Masse 1 , Champlain Djiéto-Lordon 1 , Ruth Mony 1 , Maurice Tindo 2 , Martin Kenne 2
Affiliation  

Urbanization is one of the most lasting anthropogenic disturbances threatening native species diversity including ants. Ants play important ecological functions such as seed dispersal, biological pest control, and bio-indicators of environmental changes. Herein, we investigated and tracked ant communities in three sites (rural, suburban and urban) in 2007 and resampled the same categories ten years after, using the same methods. A total of 39 species belonging to 7 subfamilies and 19 genera was recorded during the two sampling periods. During the 10-year study period, ant species richness declined in sites that were rural in 2007, but suburban in 2017. However, ant species richness increased between 2007 and 2017 in sites that were suburban and urban in 2007, and urban sites in 2017. In contrast, ant abundance increased significantly within all sites over time. Six tramp species were found in different sites with Wasmannia auropunctata and Pheidole megacephala being the most common species between 2007 and 2017 respectively. Tramp species represented more than a half of all ant fauna at each sampling period and their abundance increased by 55% between 2007 and 2017. These results indicate changes in ant community composition and highlight explosion of some tramp species with urbanization over longer temporal scales. This study also demonstrates that the rapid transformation of suburban and rural areas into built environments leads to the replacement of native species by disturbance specialists in urbanized areas over time. The suburban peak in species numbers suggests that edge effects may influence the diversity and composition of ant species along urbanization gradients. Further research is needed to understand the ecological processes shaping the ant community in areas with intermediate levels of disturbance.



中文翻译:

喀麦隆雅温得大都市沿城乡梯度的蚂蚁群落组合的时间变化

城市化是威胁包括蚂蚁在内的本地物种多样性的最持久的人为干扰之一。蚂蚁具有重要的生态功能,如种子传播、生物害虫防治和环境变化的生物指标。在此,我们在 2007 年调查和跟踪了三个地点(农村、郊区和城市)的蚂蚁群落,并在十年后使用相同的方法重新采样了相同的类别。在两个采样期间共记录了属于 7 个亚科和 19 个属的 39 个物种。在 10 年的研究期间,2007 年农村站点的蚂蚁物种丰富度下降,2017 年郊区站点的蚂蚁物种丰富度在 2007 年和 2017 年之间增加,2007 年郊区和城市站点以及 2017 年城市站点的蚂蚁物种丰富度增加。 相比之下,随着时间的推移,所有地点的蚂蚁丰度都显着增加。在不同地点发现了六种流浪动物Wasmannia auropunctataPheidole megacephala分别是 2007 年和 2017 年间最常见的物种。在每个采样周期,流浪物种占所有蚂蚁动物群的一半以上,它们的丰度在 2007 年至 2017 年间增加了 55%。这些结果表明蚂蚁群落组成发生了变化,并突出了一些流浪物种在更长的时间尺度上随着城市化而爆发。这项研究还表明,随着时间的推移,郊区和农村地区向建筑环境的快速转变导致城市化地区的干扰专家取代本地物种。物种数量的郊区峰值表明边缘效应可能会影响沿城市化梯度的蚂蚁物种的多样性和组成。

更新日期:2021-07-12
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