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How does surrounding vegetation affect the course of succession: A five-year container experiment

机译：周围的植被如何影响演替过程：一项为期五年的容器实验

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QuestionHow does location and time of insertion affect the course of succession in experimental containers?LocationBenesov nad Lipou, Ceskomoravska vrchovina (Czech-Moravian uplands), Czech RepublicMethodsWe designed a 5-year container experiment in which plant succession started from scratch. Soil conditions were constant and all containers were filled with homogeneous substrate containing no propagules. We placed the containers in two contrasting habitats (meadow and floodplain) under identical climatic conditions but differing in surrounding vegetations and hence seed input. New containers were installed (and hence succession started) in two subsequent years, twice in each year (spring and autumn). We assume that the individual dates would lead to differences in propagule input and weather conditions.ResultsAlthough both year and season of succession initiation considerably affected the initial species composition, we observed a pronounced convergence within the set of containers located in each habitat. However, the similarity of containers initiated at the same time but located in different habitats decreased over the course of succession. Final composition of the meadow and floodplain containers was therefore mostly determined by permanent seed input from their nearby neighborhood.ConclusionsThis study demonstrated that propagule availability is an important determinant of the course of succession, and that differential seed input leads to different pathways of succession, even when all other environmental conditions are equal.
机译：问题位置和插入时间如何影响实验容器中的演替过程？位置捷克共和国Ceskomoravska vrchovina（捷克-摩拉维亚高地）的Benesov nad Lipou方法我们设计了一个为期5年的容器实验，从头开始进行植物演替。土壤条件是恒定的，所有的容器都装满没有繁殖体的均质基质。我们将容器放在气候条件相同但周围植被不同（因此种子输入不同）的两个相反的栖息地（草地和洪泛区）中。随后的两年中安装了新的容器（因此开始了新的容器），每年两次（春季和秋季）。我们假设单个日期会导致繁殖体输入和天气条件的差异。结果尽管开始演习的年份和季节都极大地影响了初始物种的组成，但我们观察到每个栖息地的一组容器内都有明显的趋同。但是，同时启动但位于不同栖息地的容器的相似性在演替过程中下降了。因此，草甸和洪泛区容器的最终组成主要取决于附近邻域的永久种子输入。结论这项研究表明，繁殖体的可用性是演替过程的重要决定因素，不同的种子输入会导致不同的演替途径，甚至当所有其他环境条件都相同时。

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