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首页> 外文期刊>Conservation Biology >Role of corridors in plant dispersal: an example with the endangered Ranunculus nodiflorus
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Role of corridors in plant dispersal: an example with the endangered Ranunculus nodiflorus

机译：走廊在植物扩散中的作用：以濒危毛an为例

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The proposition that the migration of organisms between habitat patches could be enhanced by corridors has been much discussed among conservation biologists. But the few experimental studies supporting the usefulness of corridors have all concerned animal species. We investigated the role of corridors in seed dispersal, studying population genetic and demographic structure in metapopulations of the rare, pond-dwelling, autogamous plant species Ranunculus nodiflorus L. in the Fontainebleau Forest (France). Differentiation on three polymorphic isozyme markers was strong among local populations (ponds) within metapopulations (sites) and moderate among metapopulations. Partial Mantel tests revealed that the connection of ponds through temporarily flooded natural corridors, facilitating seed migration, had a strong negative effect on genetic differentiation between local populations and that a pond was more likely to be colonized when connected by corridors to other occupied ponds. Thus, corridors are probably a key element of landscape structure for metapopulation dynamics in R. nodiflorus. From a conservation perspective, our results suggest that corridors could increase the chance of persistence of plant species living in fragmented habitats by promoting seed dispersal between habitat patches. [References: 42]
机译：在保护生物学家中，关于通过走廊增强生物在栖息地之间迁移的主张已经进行了很多讨论。但是，很少有支持走廊有用性的实验研究都涉及动物物种。我们调查了走廊在种子传播中的作用，研究了枫丹白露森林（法国）中稀有的，池塘居住的，能自交的植物物种毛an（Ranunculus nodiflorus L.）的种群中的种群遗传和人口结构。三种多态同工酶标记在亚群（位点）内的本地种群（池塘）中分化很强，而在亚种之间则中等。 Mantel的部分测试表明，通过临时淹没的自然走廊连接池塘，促进了种子迁移，对本地种群之间的遗传分化产生了很大的负面影响，并且通过走廊与其他被占用的池塘相连时，池塘更容易被殖民。因此，走廊可能是野蔷薇种群动态的景观结构的关键要素。从保护的角度来看，我们的结果表明，走廊可以通过促进种子在生境斑块之间的扩散而增加生存在零散生境中的植物物种的持久性机会。 [参考：42]

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