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Increased precipitation magnifies the effects of N addition on performance of invasive plants in subtropical native communities
Journal of Plant Ecology ( IF 2.7 ) Pub Date : 2021-09-18 , DOI: 10.1093/jpe/rtab103
Xiang-Qin Li 1, 2 , Sai-Chun Tang 1 , Yu-Mei Pan 1 , Chun-Qiang Wei 1 , Shi-Hong Lü 1
Affiliation  

Abstract
Aims
Nitrogen (N) deposition, precipitation and their interaction affect plant invasions in temperate ecosystems with limiting N and water resources, but whether and how they affect plant invasions in subtropical native communities with abundant N and precipitation remains unclear.
Methods
We constructed in situ artificial communities with 12 common native plant species in a subtropical system and introduced four common invasive plant species and their native counterparts to these communities. We compared plant growth and establishment of introduced invasive species and native counterparts in communities exposed to ambient (CK), N addition (N+), increased precipitation (P+) and N addition plus increased precipitation (P+N+). We also investigated the density and aboveground biomass of communities under such conditions.
Important Findings
P+ alone did not enhance the performance of invasive species or native counterparts. N+ enhanced only the aboveground biomass and relative density of invasive species. P+N+ enhanced the growth and establishment performance of both invasive species and native counterparts. Most growth and establishment parameters of invasive species were greater than those of native counterparts under N+, P+ and P+N+ conditions. The density and aboveground biomass of native communities established by invasive species were significantly lower than those of native communities established by native counterparts under P+N+ conditions. These results suggest that P+ may magnify the effects of N+ on performance of invasive species in subtropical native communities where N and water are often abundant, which may help to understand the effect of global change on plant invasion in subtropical ecosystems.


中文翻译:

降水增加放大了氮添加对亚热带本土群落入侵植物性能的影响

摘要
宗旨
氮 (N) 沉积、降水及其相互作用会影响氮和水资源有限的温带生态系统中的植物入侵,但它们是否以及如何影响具有丰富氮和降水的亚热带本土群落中的植物入侵尚不清楚。
方法
我们亚热带系统中构建具有 12 种常见本地植物物种的原位人工群落,并向这些群落引入了四种常见的入侵植物物种及其本地对应物。我们比较了暴露于环境 (CK)、氮添加 (N+)、降水增加 (P+) 和氮添加加降水增加 (P+N+) 的社区中引入的入侵物种和本地对应物种的植物生长和建立。我们还调查了这种条件下群落的密度和地上生物量。
重要发现
单独使用 P+ 并不能提高入侵物种或本地物种的性能。N+仅增强了入侵物种的地上生物量和相对密度。P+N+ 增强了入侵物种和本地物种的生长和建立性能。在 N+、P+ 和 P+N+ 条件下,大多数入侵物种的生长和建立参数大于本地对应物种。在 P+N+ 条件下,入侵物种建立的本地群落的密度和地上生物量显着低于本地对应物建立的本地群落的密度和地上生物量。这些结果表明,在氮和水通常很丰富的亚热带本土群落中,P+ 可能会放大 N+ 对入侵物种表现的影响,
更新日期:2021-09-20
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