Data and code: Global and regional ecological boundaries explain abrupt spatial discontinuities in avian frugivory interactions

Species interactions can propagate disturbances across space via direct and indirect effects, potentially connecting species at a global scale. However, ecological and biogeographic boundaries may mitigate this spread by demarcating the limits of ecological networks. We tested whether large-scale ecological boundaries (ecoregions and biomes) and human disturbance gradients increase dissimilarity among plant-frugivore networks, while accounting for background spatial and elevational gradients and differences in network sampling. We assessed network dissimilarity patterns over a broad spatial scale, using 196 quantitative avian frugivory networks (encompassing 1,496 plant and 1,004 bird species) distributed across 67 ecoregions, 11 biomes, and 6 continents. We show that dissimilarities in species and interaction composition, but not network structure, are greater across ecoregion and biome boundaries and along different levels of human disturbance. Our findings indicate that biogeographic...

物种间的相互作用可通过直接与间接效应在空间中传递扰动，进而有望在全球尺度上实现各类物种的跨区域联结。然而，生态边界与生物地理边界可通过划定生态网络的边界，抑制这种扰动的扩散。本研究针对大型生态边界（生态区(ecoregions)与生物群系(biomes)）及人类扰动梯度是否会加剧植物-食果动物网络(plant-frugivore networks)间的相异度展开检验，同时控制了背景空间梯度、海拔梯度以及网络采样差异的混杂影响。本研究依托分布于67个生态区、11个生物群系及6个大陆的196份定量鸟类食果网络(quantitative avian frugivory networks，涵盖1496种植物与1004种鸟类)，在大空间尺度上探究了网络相异度的分布格局。研究结果表明，物种组成与相互作用组成的相异度（而非网络结构）在跨越生态区与生物群系边界时，以及沿不同人类扰动水平下均会显著升高。本研究结果显示，生物地理...