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The Relative Importance of Spatial and Local Environmental Factors in Determining Beetle Assemblages in the Inner Mongolia Grassland

机译：空间和局部环境因素在确定内蒙古草地甲虫组合中的相对重要性

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The aim of this paper is to increase understanding of the relative importance of the input of geographic and local environmental factors on richness and composition of epigaeic steppe beetles (Coleoptera: Carabidae and Tenebrionidae) along a geographic (longitudinal/precipitation) gradient in the Inner Mongolia grassland. Specifically, we evaluate the associations of environmental variables representing climate and environmental heterogeneity with beetle assemblages. Beetles were sampled using pitfall traps at 25 sites scattered across the full geographic extent of the study biome in 2011–2012. We used variance partitioning techniques and multi-model selection based on the Akaike information criterion to assess the relative importance of the spatial and environmental variables on beetle assemblages. Species richness and abundance showed unimodal patterns along the geographic gradient. Together with space, climate variables associated with precipitation, water-energy balance and harshness of climate had strong explanatory power in richness pattern. Abundance pattern showed strongest association with variation in temperature and environmental heterogeneity. Climatic factors associated with temperature and precipitation variables and the interaction between climate with space were able to explain a substantial amount of variation in community structure. In addition, the turnover of species increased significantly as geographic distances increased. We confirmed that spatial and local environmental factors worked together to shape epigaeic beetle communities along the geographic gradient in the Inner Mongolia grassland. Moreover, the climate features, especially precipitation, water-energy balance and temperature, and the interaction between climate with space and environmental heterogeneity appeared to play important roles on controlling richness and abundance, and species compositions of epigaeic beetles.
机译：本文的目的是沿着内蒙古的地理（纵向/降水）梯度，进一步了解地理和地方环境因素的输入对表皮草原甲虫（鞘翅目：甲虫和天牛科）的丰富度和组成的相对重要性。草原。具体而言，我们评估了代表气候和环境异质性的环境变量与甲虫组合的关联。使用陷阱陷阱在2011-2012年整个研究生物群落的整个地理范围内分布的25个地点取样了甲虫。我们使用方差分区技术和基于Akaike信息准则的多模型选择来评估空间和环境变量对甲虫组合的相对重要性。物种丰富度和丰富度沿地理梯度显示出单峰模式。与空间一起，与降水，水能平衡和气候恶劣相关的气候变量在丰富度模式中具有很强的解释力。丰度模式显示出与温度和环境异质性变化的最强关联。与温度和降水变量有关的气候因素以及气候与空间之间的相互作用能够解释群落结构的大量变化。此外，物种的周转随着地理距离的增加而显着增加。我们确认，空间和局部环境因素共同作用，沿着内蒙古草原的地理梯度塑造了表皮甲虫群落。此外，气候特征，特别是降水，水能平衡和温度，以及气候与空间和环境异质性之间的相互作用似乎在控制表皮甲虫的丰富度和丰度以及物种组成方面起着重要作用。

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