Assessment of species extinction risk integrating spatio-temporal data

为了通过对所涉及的过程的机械见解来扩展先前关于估计日本龟灭绝风险的工作，我们分析了（1）日本龟物种先前的定量灭绝风险评估与（2）物种的生态特征（即，分布范围和生境类型[lentic或lotic]）。在那些灭绝风险较高的物种中，长寿物种所占比例不成比例。分布范围较大的物种也比分布范围较窄的物种面临更高的灭绝风险，反映了一种在全国范围内发挥作用的驱动力（即，稻田系统严重退化）。这些生态学特征可以很好地解释物种灭绝风险的差异。

To extend previous work on estimating dragonfly extinction risk by developing mechanistic insights into the processes involved, we analyzed relationships between (1) previous quantitative extinction risk assessments for Japanese dragonfly species and (2) species' ecological characteristics (i.e., distribution range and habitat type [lentic or lotic]). Lentic species were disproportionately represented among those with elevated extinction risk. Species with large distribution ranges were also subject to higher extinction risks than those with narrower ranges, reflecting a driving force acting at a national scale (i.e., intensive degradation of paddy systems). We also demonstrated that these ecological characteristics could explain the variation of extinction risks among the species adequately.