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首页> 外文期刊>Journal of Vegetation Science >Grazing networks provide useful functional connectivity for plants in fragmented systems.
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Grazing networks provide useful functional connectivity for plants in fragmented systems.

机译：放牧网络为零散系统中的植物提供了有用的功能连接。

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Question: To what extent does the movement of animals between fragmented habitat patches provide functional connectivity via endozoochorous seed dispersal Location: The Stockholm archipelago, Sweden. Methods: We followed all movements of livestock between islands during one grazing season. After each movement, manure was collected and its seed content assessed through seedling emergence. Seedling data were then compared to vegetation surveys from the grazed islands with regard to functional traits. Results: Light- and nitrogen-demanding locally abundant species, and those with relatively small and persistent seeds were more likely to be moved between islands. For quantitative traits, only a subset of the available trait ranges were dispersed, with extreme values left behind. Species apparently specialized to other means of dispersal emerged from the manure samples. Neither dispersed traits nor seed density changed with timing of movement, but seed richness and diversity both increased throughout the season. The subsets of endozoochorously-dispersed species in the established vegetation were more similar than non-dispersed subsets between islands linked by livestock. Conclusions: Grazing networks contribute to the connectivity of the core species in the system, and could provide useful tools for grassland management in fragmented landscapes.
机译：问题：零散的栖息地斑块之间的动物运动在多大程度上通过内生的种子传播而提供功能上的连通性地点：瑞典斯德哥尔摩群岛。方法：我们追踪了一个放牧季节中岛间所有牲畜的活动。每次运动后，收集粪肥，并通过出苗评估其种子含量。然后将幼苗数据与放牧岛屿的植被调查进行功能性比较。结果：需要光和氮的本地丰富物种，以及种子相对较小且持久的物种更可能在岛屿之间移动。对于定量性状，仅分散了可用性状范围的一个子集，留下了极高的值。显然，粪便样本中出现了专门用于其他分散方式的物种。分散的性状和种子密度都没有随运动时间的变化而变化，但是整个季节中种子的丰富度和多样性都增加了。在已建立的植被中，内生针虫的物种的子集比由牲畜连接的岛屿之间的非分散子集更为相似。结论：放牧网络有助于系统中核心物种的连通性，并可以为零散景观中的草地管理提供有用的工具。

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