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Relative abundance of invasive plants more effectively explains the response of wetland communities to different invasion degrees than phylogenetic evenness
Journal of Plant Ecology ( IF 2.7 ) Pub Date : 2021-07-07 , DOI: 10.1093/jpe/rtab074
Kai Sun 1 , Xuan-Shao Liu 1 , Tian-Jian Qin 2 , Fan Jiang 1 , Jing-Fang Cai 1 , Yi-Luan Shen 1 , Si-ha A 1 , Hong-Li Li 1
Affiliation  

Abstract
Aims
Native plant communities are commonly invaded by invasive plants to different degrees. However, the relative contribution of the invasive plant abundance vs. phylogenetic evenness to the responses of wetland communities to different degrees of invasion is still unclear. In addition, whether such contribution varies with environmental conditions such as flooding is also unclear.
Methods
To address these questions, we chose Alternanthera philoxeroides as the invasive plant, and set up four invasive degrees by changing the community species composition under both flooding and non-flooding conditions. The relative abundance of A. philoxeroides and phylogenetic evenness changed simultaneously with the change in the community invasion degree.
Important Findings
The invasion degree significantly affected the individual biomass of A. philoxeroides and some native species. Variation partitioning showed that the relative abundance of A. philoxeroides contributed more to variation in community indicators than phylogenetic evenness, regardless of flooding. Spearman rank correlation test showed that the relative abundance of A. philoxeroides was negatively correlated with the individual biomass of A. philoxeroides and some native species, while the phylogenetic evenness was positively correlated with only a few native species. And their correlation strength and significance were all affected by specific species and flooded environment. In conclusion, our results suggest that the relative abundance of A. philoxeroides can more effectively explain the wetland community response to different invasion degrees than phylogenetic evenness, regardless of flooding.


中文翻译:

入侵植物的相对丰度比系统发育均匀度更有效地解释了湿地群落对不同入侵程度的反应

摘要
宗旨
外来植物群落普遍受到入侵植物不同程度的入侵。然而,入侵植物丰度与系统发育均匀度对湿地群落对不同程度入侵的反应的相对贡献仍不清楚。此外,这种贡献是否随着洪水等环境条件而变化也不清楚。
方法
为了解决这些问题,我们选择空心莲子草作为入侵植物,并通过在洪水和非洪水条件下改变群落物种组成来设置四个入侵度。A. philoxeroides的相对丰度和系统发育均匀度随着群落入侵程度的变化而变化。
重要发现
入侵程度显着影响空心草和一些本地物种的个体生物量。变异划分表明,与系统发育均匀度相比,无论洪水如何,A. philoxeroides的相对丰度对群落指标的变异贡献更大。Spearman等级相关试验表明,相对丰度空心莲子草呈负的个体的生物量相关空心莲子草和一些本地物种,而系统发育的均匀度仅与少数本地物种呈正相关。并且它们的相关强度和显着性都受特定物种和淹没环境的影响。总之,我们的结果表明,与系统发育均匀度相比,无论洪水如何,A. philoxeroides的相对丰度都可以更有效地解释湿地群落对不同入侵程度的响应。
更新日期:2021-07-09
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