Functional diversity of snakes is explained by the landscape composition at multiple areas of influence

Roadkill and landscape compsition affect snakes at diferent spatial scales, depending on the functional trait value of the species, which is reflected in the functional diversity indices at the assemblage level. This study evaluated the effect of roads and landscape composition on snakes´functional diversity at different areas of incluence (250, 500, 1000, and 2000 m buffer areas). We surveyed snakes using transects on the road and adjacent areas on 13 landscapes along the road. We evaluated the effect of 16 landscape metrics at six land cover classes on the snake´s functional diversity at four different areas of influence (from 250 to 2000 m around the sampled sites).路杀（roadkill）与景观组成（landscape composition）会在不同空间尺度上对蛇类产生影响，该影响的强弱取决于物种的功能性状值（functional trait value），且可通过集合群落（assemblage）水平的功能多样性指数（functional diversity indices）得到反映。本研究评估了道路与景观组成对蛇类功能多样性的影响，评估设置了4种不同的影响范围，即采样点周边250、500、1000与2000米的缓冲区（buffer area）。研究沿道路选取13处景观样区，通过在道路及邻近区域布设样带（transect）开展蛇类野外调查。本研究进一步针对6类土地覆盖类型（land cover classes）下的16项景观指数（landscape metrics），在采样点周边250米至2000米的4种不同影响范围内，分析其对蛇类功能多样性的影响效应。