Flower visitation of alien plants is non-linearly related to phylogenetic and floral similarity to native plants
Flower visitation of alien plants is non-linearly related to phylogenetic and floral similarity to native plants
复制标题
DOI：
10.1101/2022.02.14.480304
复制
发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Mialy Razanajatovo;Felana Rakoto Joseph;Princy Rajaonarivelo Andrianina;M. van Kleunen
中科院分区：
文献类型：
--
作者：
Mialy Razanajatovo;Felana Rakoto Joseph;Princy Rajaonarivelo Andrianina;M. van Kleunen
生物入侵是理解决定新相互作用形成的主要生态过程的关键。如果同花的本地物种与外来物种具有相似的花特征，那么它们可能会促进外来物种的花卉访问。然而，如果传粉者的竞争很重要，那么如果外来物种具有与本地物种不同的性状，那么它们对花朵的访问可能会更高。我们测试了外来植物的花访问是否取决于与本地植物的系统发育相关性和花的相似性。在一项田野实验中，我们通过将盆栽外来植物添加到共同开花的本地群落中来模拟入侵的群落。我们记录了 34 个外来物种和 20 个本地物种对总共 151 个物种组合的花卉访问，历时 3,068 小时。当外来物种与本地物种的花性状距离处于中等水平且系统发育距离较低或较高时，它们对花卉的访问量最高。当外来植物与本地植物的系统发育较低且花性状距离较低或较高时，它们会收到与本地植物更相似的访花群体。花的访问与外来物种和本地物种的相似性之间的非线性模式表明，促进和竞争的相互作用同时推动了新型植物与传粉者相互作用的形成。系统发育和花性状距离与花拜访外来植物的关系的形状是相反的，可能是由于性状之间系统发育信号的强度不同。我们提供了实验证据，证明与本地植物的相关性和功能相似性对外来植物访花的影响。我们表明，这种影响可能是非线性的，性状差异和系统发育距离对传粉媒介介导的相互作用的影响可以反映不同的机制。
Biological invasions are key to understanding major ecological processes that determine the formation of novel interactions. Flower visitation to alien species may be facilitated by co-flowering natives if they share similar floral traits with the latter. However, if competition for pollinators is important, flower visitation to alien species may be higher if they have traits different from those of native species. We tested whether flower visitation to alien plants depended on phylogenetic relatedness and floral similarity to native plants. In a field experiment, we simulated invaded communities by adding potted alien plants into co-flowering native communities. We recorded flower visitation to pairs of 34 alien and 20 native species totalling 151 species combinations for 3,068 hours. Flower visitation to alien species was highest when they had intermediate floral trait distances to native species, and either low or high phylogenetic distances. The alien plants received more similar flower-visitor groups to natives when they had low phylogenetic and either low or high floral trait distances to native plants. The non-linear patterns between flower visitation and similarity of the alien and native species suggest that an interplay of facilitation and competition simultaneously drives the formation of novel plant-pollinator interactions. The shapes of the relationships of phylogenetic and floral trait distances with flower visitation to alien plants were contrasting, possibly due to different strengths of phylogenetic signal among traits. We provide experimental evidence for the effects of relatedness and functional similarity to native plants on flower visitation of alien plants. We show that such effects might be non-linear, and that effects of trait dissimilarity and phylogenetic distance on pollinator-mediated interactions can reflect different mechanisms.