Invasive alien plants benefit more from clonal integration in heterogeneous environments than natives
Invasive alien plants benefit more from clonal integration in heterogeneous environments than natives
复制标题
外来入侵植物比本地植物更能从异质环境中的克隆整合中获益
DOI：
10.1111/nph.14820
复制
发表时间：
2017-12-01
期刊：
影响因子：
9.4
通讯作者：
Yu, Fei-Hai
中科院分区：
文献类型：
--
作者：
Wang, Yong-Jian;Mueller-Schaerer, Heinz;Yu, Fei-Hai
是什么赋予外来入侵植物相对于本土植物的竞争优势仍然有待讨论。许多世界上最严重的外来入侵植物是克隆的，并且能够在克隆内共享资源（克隆整合），特别是在异质环境中。在此，我们检验了克隆整合对入侵克隆植物比本地克隆植物更有利，从而赋予入侵植物竞争优势的假设。我们选择了5对在中国同源和自然共存的入侵植物和本地克隆植物，在异质光下生长连接和不连接的分株对，土壤养分和水分条件是外来植物入侵新地区时经常遇到的。克隆整合增加了所有植物在所有三种异质资源环境中的生物量。然而，入侵植物从克隆整合中受益更多。结果表明，克隆整合可能赋予外来入侵克隆植物相对于本地植物的竞争优势。因此，克隆整合能力的差异可能解释，至少部分地，外来克隆植物的入侵成功的资源分布不均的地区。
What confers invasive alien plants a competitive advantage over native plants remains open to debate. Many of the world's worst invasive alien plants are clonal and able to share resources within clones (clonal integration), particularly in heterogeneous environments. Here, we tested the hypothesis that clonal integration benefits invasive clonal plants more than natives and thus confers invasives a competitive advantage.We selected five congeneric and naturally co-occurring pairs of invasive alien and native clonal plants in China, and grew pairs of connected and disconnected ramets under heterogeneous light, soil nutrient and water conditions that are commonly encountered by alien plants during their invasion into new areas.Clonal integration increased biomass of all plants in all three heterogeneous resource environments. However, invasive plants benefited more from clonal integration than natives. Consequently, invasive plants produced more biomass than natives.Our results indicate that clonal integration may confer invasive alien clonal plants a competitive advantage over natives. Therefore, differences in the ability of clonal integration could potentially explain, at least partly, the invasion success of alien clonal plants in areas where resources are heterogeneously distributed.