Interactive disturbances drive community composition, heterogeneity, and the niches of invasive exotic plant species during secondary succession

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
David F. Barfknecht, Guoyong Li, Kelsey A Martinez, D. Gibson
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引用次数: 1

Abstract

ABSTRACT Background Simultaneous disturbances during secondary succession can cause plant community shifts, facilitating exotic species invasions. However, it remains unclear if exotic invasion is facilitated by additive or interactive disturbance effects during succession. Aims Our aim was to investigate temporal shifts in plant species composition, invasive exotics, and indicator species during simultaneous disturbances in secondary succession. Methods We used species data from nine plant surveys over 22 years of a field experiment in an old field where parallel strips were randomly assigned to each of the 9 crossed fertiliser and mowing disturbance treatments. Multivariate and ordination analyses were used to quantify community response to disturbance. Indicator species analysis identified plants characteristic of different disturbance levels. Results Plant communities differed in composition and heterogeneity based on interactive effects of disturbance treatments whereas pairwise tests showed these differences occurred in over two-thirds of treatment combinations. Of the 44 indicator plant species, seven of the eight exotic species of concern for Illinois were indicator species and characterised particular disturbance treatments and surveys. Conclusions Changes in these successional plant communities depend on the interaction among disturbances, which can facilitate exotic plant invasions, leading to plant communities which disproportionately maintain invasive exotic plants as compared to other naturalised exotic and native plant species.
在次生演替过程中,交互干扰驱动了外来入侵植物物种的群落组成、异质性和生态位
在次生演替过程中,同时发生的干扰会引起植物群落的迁移,促进外来物种的入侵。然而,在演替过程中,外来物种的入侵是由加性干扰还是交互干扰促进的,目前尚不清楚。目的研究次生演替过程中植物物种组成、外来入侵物种和指示物种的时间变化。方法利用22年来9个植物调查的物种资料,在一个老田进行田间试验,在9个施肥和刈割干扰杂交处理中随机分配平行条。采用多变量分析和协调分析来量化群落对干扰的反应。指示种分析确定了不同干扰程度的植物特征。结果在干扰处理的交互效应基础上,植物群落的组成和异质性存在差异,而两两检验表明,这些差异发生在超过三分之二的处理组合中。在44种指示植物中,伊利诺伊州关注的8种外来植物中有7种是指示植物,具有特殊的干扰处理和调查特征。结论这些演替植物群落的变化依赖于干扰之间的相互作用,这些干扰有利于外来植物的入侵,导致植物群落与其他归化的外来和本地植物物种相比,不成比例地维持外来入侵植物。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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