Abstract

Aims

Plant invasion potentially will be affected by increased extreme drought events and deposition of atmospheric N. However, results from previous research indicate that it is not clear as to how extreme drought, N deposition and their interaction affect alien plant invasion, in particular for the invasive woody legumes.

Methods

We conducted a greenhouse experiment with three invasive and three native woody species of legumes (Fabaceae). We grew plants in extreme drought and in well-watered conditions combined with low and high levels of N and compared plant height, number of leaves, and biomass production and allocation.

Important Findings

Growth of native woody legumes was suppressed more by extreme drought than that of invasive woody legumes. Although an increase in soil N availability decreased the root mass fraction of plants of all species, it did not affect their overall performance. We found that invasive woody legumes can tolerate the adverse effects of the prolonged extreme drought better than native woody legumes. These results enhance our understanding of the effects of drought due to climate change on the invasion of alien woody legumes.

中文翻译：

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本土木本豆科植物对极端干旱的反应比入侵植物更消极

摘要

宗旨

植物入侵可能会受到极端干旱事件增加和大气氮沉降的影响。 然而，先前的研究结果表明，极端干旱、氮沉降及其相互作用如何影响外来植物的入侵尚不清楚，特别是对入侵植物的影响。木质豆类。

方法

我们对三种侵入性和三种本地木本豆科植物（豆科）进行了温室试验。我们在极端干旱和水分充足的条件下种植植物，结合低氮和高水平的氮，并比较了植物高度、叶子数量以及生物量生产和分配。

重要发现

与入侵的木本豆类相比，极端干旱更能抑制原生木本豆类的生长。尽管土壤氮素有效性的增加降低了所有植物的根质量分数，但并没有影响它们的整体性能。我们发现，侵入性木本豆科植物比原生木本豆科植物更能耐受长期极​​端干旱的不利影响。这些结果增强了我们对气候变化引起的干旱对外来木本豆类入侵的影响的理解。