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首页> 外文期刊>Journal of forest research >Effects of the invasive herb Ageratina adenophora on understory plant communities and tree seedling growth in Pinus yunnanensis forests in Yunnan, China
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Effects of the invasive herb Ageratina adenophora on understory plant communities and tree seedling growth in Pinus yunnanensis forests in Yunnan, China

机译：令人生素的草药Adenophora对云南云南森林森林林下植物群落和树幼苗生长的影响

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n Understanding the influence of invasive species on understory communities is necessary to maintain ecosystem functions. Here, we describe the effects of different abundances of the invasive species Ageratina adenophora on the composition and structure of understory communities and on Pinus yunnanensis seedling growth under pine stands in mid-Yunnan, China. Our data show that the different abundances of A. adenophora altered species and functional diversity by changing the species composition and abundance in the understory community because of its higher specific leaf area, leaf nitrogen concentration (LNC), and leaf phosphorus concentration compared with native species. Meanwhile, the presence of A. adenophora led to changes in the patterns of species co-occurrence, with a shift from random to segregated patters as the invasion intensity increased. Furthermore, the order of species loss under invasion was nonrandom. The LNC could be an indicative functional trait predicting the order of species loss, suggesting that species with a lower LNC were lost first with increasing invasion intensity. In addition, a high abundance of the invader A. adenophora suppressed the growth of the seedlings of native canopy trees. Our results indicate that the effect of the invasive herb A. adenophora on the understory community is associated with the nonrandom loss of species with different LNCs and that invasion also suppresses the growth of native canopy dominants.
机译：n理解侵入性物种对林下社区的影响是维持生态系统功能的必要条件。在这里，我们描述了侵袭性物种患者腺嘌呤对云南中南中林山脉幼苗幼苗生长对林下社区的组成和结构的影响。我们的数据表明，由于其具有较高的特异性叶面积，叶片氮浓度（LNC）和与天然物种的叶磷浓度改变物种组成和丰度，Adenophora改变了物种和功能多样性的不同丰富。 。同时，A.Adenophora的存在导致物种共同模式的变化，随着侵袭强度的增加，随机地从随机转移到隔离的图案。此外，侵袭下物种损失的顺序是非谐波。 LNC可以是预测物种损失顺序的指示性功能性质，表明具有较低的LNC的物种首先丢失了侵袭强度。此外，高丰度的入侵者A.腺嘌呤抑制了天然冠层树的幼苗的生长。我们的结果表明，侵袭性草本A.腺嘌呤对林育群落的影响与具有不同LNC的物种的非粗糙度丧失有关，并且侵袭也抑制了天然顶篷显性的生长。

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