Effective seed dispersal across a fragmented landscape
Effective seed dispersal across a fragmented landscape
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DOI：
10.1126/science.1121543
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发表时间：
2006-02-03
期刊：
影响因子：
56.9
通讯作者：
Ennos, RA
中科院分区：
文献类型：
--
作者：
Bacles, CFE;Lowe, AJ;Ennos, RA
种子传播在维持森林片段间遗传连通性方面的作用在很大程度上被忽视了，因为花粉的基因流动预计占主导地位。采用谱系重建的方法，研究了风传粉、风散树种种子建立后的基因流动。我们的数据表明，种子传播是残体之间基因流动的主要载体，并且在长期破碎的景观中长距离传播是常见的。在其他碎片化系统中，种子介导的基因流的相对重要性可能被低估，而诊断森林树木对当前人为干扰的反应需要在建立后对现象进行评估。
The role of seed dispersal in maintaining genetic connectivity among forest fragments has largely been ignored because gene flow by pollen is expected to predominate. By using genealogical reconstruction, we investigated gene flow after establishment of seeds in a wind-pollinated, wind-dispersed tree. Our data show that seed dispersal is the main vector of gene flow among remnants and that long-distance dispersal is common across a chronically fragmented landscape. The relative importance of seed-mediated gene flow may have been underemphasized in other fragmented systems, and diagnosing the response of forest trees to current anthropogenic disturbances requires the assessment of phenomena after establishment.