Reproductive dominance of pasture trees in a fragmented tropical forest mosaic
Reproductive dominance of pasture trees in a fragmented tropical forest mosaic
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DOI：
10.1126/science.281.5373.103
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发表时间：
1998-07-03
期刊：
影响因子：
56.9
通讯作者：
Hamrick, JL
中科院分区：
文献类型：
--
作者：
Aldrich, PR;Hamrick, JL
热带森林的破碎化威胁着生物多样性，但缺乏关于植物等主要群体的种群反应的基本信息。高变遗传标记被用来重建一个群体水平的谱系在片断化的热带森林树木球形Symphonia。虽然幼苗只出现在残留的森林，系谱显示，大多数幼苗已产生的顺序较少的成年人在牧场，创造了一个遗传瓶颈。这一谱系还暗示了动物觅食的转变，即在瓶颈的次级收缩中传播花粉和种子。这些结果表明，热带保护战略应预见复杂的，神秘的反应碎片化。
Tropical forest fragmentation threatens biodiversity, yet basic information on population responses for major groups such as plants is lacking. Hypervariable genetic markers were used to reconstruct a population-level pedigree in fragmented tropical forest for the tree Symphonia globulifera. Though seedlings occurred only in remnant forest, the pedigree showed that most seedlings had been produced by sequentially fewer adults in pasture, creating a genetic bottleneck. The pedigree also implicated shifts in the foraging of animals that disperse pollen and seed in a secondary constriction of the bottleneck. These results suggest that tropical conservation strategies should anticipate complex, cryptic responses to fragmentation.