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.
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.