Exotic plants can compete well with native species because many invasive species are considered better nutrient users in both low- and high-resource environments. However, whether invasive plants can outperform native plants at all stages of invasion is not very clear. We investigated the nitrogen (N), phosphorus (P) and N:P homeostasis of an invasive Eupatorium adenophorum and a co-occurring native plant Artemisia argyi in an area across the five invasion stages of E. adenophorum. The N homeostasis (HN) of E. adenophorum was higher than that of A. argyi, whereas the P and N:P homeostasis (HP and HN/P) were higher for A. argyi. For E. adenophorum, HN decreased, but HP and HN /P increased with the invasion time. For A. argyi, HN /P increased, HP and HN remained stable with the invasion time. The results demonstrated that E. adenophorum could maintain higher HN during invasion stages when N was limited and could maintain higher HN and HP at invasion stages when P was more limited. This rapid nitrogen and phosphorus homeostasis transformation of invasive E. adenophorum during its invasion stages guarantees its stronger competitive ability over native species and promotes its invasion success. (Less)

中文翻译：

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紫茎泽兰入侵过程中氮磷稳态的快速转化

外来植物可以与本地物种竞争，因为许多入侵物种在低资源和高资源环境中被认为是更好的营养使用者。然而，入侵植物是否在入侵的各个阶段都能胜过原生植物，目前还不是很清楚。我们调查了侵入性紫茎泽兰和共生的原生植物艾蒿在整个 E. adenophorum 的五个入侵阶段的氮 (N)、磷 (P) 和 N:P 稳态。E. adenophorum 的 N 稳态 (HN) 高于 A. argyi，而 A. argyi 的 P 和 N:P 稳态（HP 和 HN/P）更高。对于沙参，HN 减少，但HP 和HN /P 随入侵时间增加。对于A. argyi，HN /P 增加，HP 和HN 随入侵时间保持稳定。结果表明，E. 当氮含量有限时，紫茎泽兰在入侵阶段可以保持较高的HN，而在磷含量更有限的情况下，可以在入侵阶段保持较高的HN和HP。入侵的沙参在其入侵阶段的这种快速的氮和磷稳态转化保证了其对本地物种的更强的竞争能力并促进了其入侵的成功。（较少的）