Patterns of molecular evolution and diversification in a biodiversity hotspot: the California Floristic Province
Patterns of molecular evolution and diversification in a biodiversity hotspot: the California Floristic Province
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DOI：
10.1046/j.1365-294x.2003.01794.x
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发表时间：
2003-04-01
影响因子：
4.9
通讯作者：
Richardson, JE
中科院分区：
文献类型：
--
作者：
Calsbeek, R;Thompson, JN;Richardson, JE
加州植物区系省比北美任何其他同等面积的地区拥有更多的特有植物和动物分类群和更多可识别的亚种。我们提出的证据表明，在过去的200万至1000万年中，物理历史过程导致了遗传多样性的一致模式。利用分子钟方法，我们发现6个分类类群的多样性和空间遗传结构的建立与加利福尼亚山脉和该地区干旱化的假定年龄相吻合。我们的研究结果表明，地理屏障和气候事件对物种多样性和生物多样性的整体地理结构的重要性。这些结果将有助于在这一生物多样性热点地区对种群遗传结构尚不清楚的类群进行保护工作，并可能表明该方法在区域保护规划工作中的潜在效用。
The California Floristic Province harbours more endemic plant and animal taxa and more identifiable subspecies than any other area of comparable size in North America. We present evidence that physical historical processes have resulted in congruent patterns of genetic diversity over the past 2-10 million years. Using a molecular clock approach we show that diversification and establishment of spatial genetic structure across six taxonomic groups coincide with the putative age of California's mountain ranges and aridification in the region. Our results demonstrate the importance of geographical barriers and climatological events to species diversification and the overall geographical structure of biodiversity. These results should facilitate conservation efforts in this biodiversity hotspot for taxa whose population genetic structure is still unknown and may suggest the potential utility of this approach in regional conservation planning efforts.