Tropical tree gene flow and seed dispersal
Tropical tree gene flow and seed dispersal
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DOI：
10.1038/43597
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发表时间：
1999-09-09
期刊：
影响因子：
64.8
通讯作者：
Hamilton, MB
中科院分区：
文献类型：
--
作者：
Hamilton, MB
在热带森林中，树木提供了支持数千个物种的栖息地和环境条件。然而，森林砍伐造成了被砍伐的区域和森林碎片的马赛克景观，成为未来树木种群的来源。破碎改变了花粉和种子传播的运动，改变了基因流并改变了遗传细分的历史模式。对热带无花果和树木的亲子关系研究表明，花粉可以长距离传播，从而维持了广泛分布的森林碎片之间的基因流动，但尚未在热带树木中研究种子传播引起的基因移动。我估计了亚马逊树冠树Corythophora alta 中叶绿体基因组的细分，在这里我表明种子传播是有限的，大至十公顷的森林碎片是由单一母系建立的。
In tropical forests, trees provide habitats and environmental conditions that support thousands of species. However, deforestation creates a mosaic landscape of cleared areas and forest fragments, which become the source of future tree populations. Fragmentation changes the movement of pollen and seed dispersal, modifying the gene flow and altering historical patterns of genetic subdivision. Paternity studies in tropical figs and trees have shown that pollen is dispersed over long distances, maintaining gene flow among widely spaced forest fragments, but gene movement by seed dispersal has not been studied in tropical trees. I have estimated chloroplast genome subdivision in the Amazonian canopy treeCorythophora alta, and here I show that seed dispersal is limited, with forest fragments as large as ten hectares being founded by a single maternal lineage.