Landscape predictors of rodent dynamics in fragmented rainforests

Data on rodent species abundance (<i>Oryzomys</i> sp., <i>Heteromys desmarestianus</i>, <i>Sigmodon hispidus</i> and <i>Peromyscus mexicanus</i>) was obtained in 12 forest sites in the fragmented Lacandona rainforest. We obtained the correlation coefficients (Spearman), i.e., how population abundance relates to year (2011, 2012, 2014 and 2016) and related this with differences across time (2016-2010) in landscape structure (i.e., percentage of forest cover, matrix contrast, number of forest patches, forest edge density, and mean inter-patch distance) surrounding each site. Landscape metrics were measured across different landscape sizes (range of radii = 200 to 1400 m, at 200-m intervals). <br><br>

本数据集涵盖碎片化拉克当达雨林12个森林样地的啮齿类物种种群丰度数据，涉及物种包括稻鼠属未定种（*Oryzomys* sp.）、德氏异鼠（*Heteromys desmarestianus*）、墨西哥棉鼠（*Sigmodon hispidus*）以及墨西哥鹿鼠（*Peromyscus mexicanus*）。研究获取了种群丰度与年份（2011、2012、2014及2016年）间的斯皮尔曼（Spearman）相关系数，并将该系数与各研究样地周边景观结构在2010至2016年间的变化特征进行关联分析；其中景观结构指标涵盖森林覆盖率、基质对比度、森林斑块数量、森林边缘密度及斑块间平均距离。

景观格局指数的测算覆盖不同尺度的景观范围，半径区间为200至1400米，步长为200米。