The role of alien species on plant-floral visitor network structure in invaded communities
The role of alien species on plant-floral visitor network structure in invaded communities
复制标题
外来物种对入侵群落植物花卉访客网络结构的作用
作者：
V. Parra‐Tabla;Diego Angulo;Cristopher Albor;M. Campos;Juan Tun;P. Sosenski;C. Alonso;T. Ashman;G. Arceo‐Gómez
外来植物和本地植物之间通过共同利用传粉媒介的相互作用已经被广泛研究。然而，为了充分了解促进植物成功入侵的因素和机制，社区水平的研究是必要的，但这些仍然很少。具体而言，很少有社区水平的研究，考虑了入侵水平（外来花丰度）的差异，以及本地和入侵物种之间的花性状相似程度，介导本地植物传粉者社区的影响。在这里，我们评估了外来物种的整体植物花卉游客网络结构的作用，并在物种水平的网络参数，分布在沿着205公里的尤卡坦州，梅西科，不同的外来物种丰富度和花卉丰富度的9个入侵的沿海社区。我们进一步评估了外来植物物种对植物-花卉访客网络结构和鲁棒性的潜在作用，通过对本地和入侵植物灭绝场景的计算模拟。我们没有发现显着差异本地和外来物种在其功能的花表型或在他们的访问率和传粉者群落组成在这些入侵网站。外来植物物种的比例和花丰度的变化并没有影响植物传粉网络结构。物种级网络参数（即，标准化程度和嵌套贡献）在本地种和外来种之间没有差异。此外，我们的模拟分析表明，外来物种在功能上等同于本地物种，并同样有助于网络结构和鲁棒性。总体而言，我们的研究结果表明，高水平的花性状相似性和传粉者使用重叠可能有助于促进外来物种融入本地植物传粉网络。因此，外来物种也可能在所研究的海岸沙丘生态系统中的本地植物和传粉者群落的结构和稳定性中发挥类似于本地物种的作用。
The interactions between pairs of native and alien plants via shared use of pollinators have been widely studied. Community level studies however, are necessary in order to fully understand the factors and mechanisms that facilitate successful plant invasion, but these are still scarce. Specifically, few community level studies have considered how differences in invasion level (alien flower abundance), and degree of floral trait similarity between native and invasive species, mediate effects on native plant-pollinator communities. Here, we evaluated the role of alien species on overall plant-floral visitor network structure, and on species-level network parameters, across nine invaded coastal communities distributed along 205 km in Yucatán, México that vary in alien species richness and flower abundance. We further assessed the potential the role of alien plant species on plant-floral visitor network structure and robustness via computational simulation of native and invasive plant extinction scenarios. We did not find significant differences between native and alien species in their functional floral phenotypes or in their visitation rate and pollinator community composition in these invaded sites. Variation in the proportion of alien plant species and flower abundance across sites did not influence plant-pollinator network structure. Species-level network parameters (i.e., normalized degree and nestedness contribution) did not differ between native and alien species. Furthermore, our simulation analyses revealed that alien species are functionally equivalent to native species and contribute equally to network structure and robustness. Overall, our results suggest that high levels of floral trait similarity and pollinator use overlap may help facilitate the integration of alien species into native plant-pollinator networks. As a result, alien species may also play a similar role than that of natives in the structure and stability of native plant and pollinator communities in the studied coastal sand dune ecosystem.
影响因子：
4.2
作者：
C. Minnaar;B. Anderson;Marinus L. de Jager;J. D. Karron
通讯作者：
C. Minnaar;B. Anderson;Marinus L. de Jager;J. D. Karron