Small edge populations at risk:: genetic diversity of the green lizard (Lacerta viridis viridis) in Germany and implications for conservation management
Small edge populations at risk:: genetic diversity of the green lizard (Lacerta viridis viridis) in Germany and implications for conservation management
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DOI：
10.1007/s10592-006-9191-0
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发表时间：
2007-06-01
影响因子：
2.2
通讯作者：
Berendonk, Thomas U.
中科院分区：
文献类型：
--
作者：
Bohme, Manja U.;Schneeweiss, Norbert;Berendonk, Thomas U.
边缘种群和中心种群在其遗传变异方面可能表现出很大的差异，因此在灭绝的概率上也会有很大的差异。这一事实可能对濒危物种的保护战略具有重要意义。在本研究中，我们研究了绿色蜥蜴Lacerta viridis viridis(Laur.)并将观察到的变异与北部物种范围内的其他边缘和中心种群进行比较。我们证明，与中心种群相比，最北端的边缘种群包含的遗传变异较少。然而，与本研究中包括的其他边缘种群相比，没有显著的差异。令人惊讶的是，我们在勃兰登堡的三个濒危种群之间观察到了小地理范围内的高度遗传分化，这可以用这些种群中的碎片化、隔离、遗传漂移和少量个体数量等过程来解释。我们还检测到了独特的遗传变异(等位基因)，这些变异只出现在这些群体中，尽管总体遗传变异很低。这项研究展示了快速进化的标记以高分辨率评估濒危种群遗传状态的潜力。它还说明了需要对物种范围内的不同区域进行比较分析，以实现对濒危种群遗传变异的更准确解释。这将有助于未来在保护受威胁物种遗传多样性方面的管理决策。
Edge and central populations can show great differences regarding their genetic variation and thereby also in their probability of extinction. This fact might be of great importance for the conservation strategies of endangered species. In this study we examine the level of microsatellite variability within three threatened edge populations of the green lizard subspecies Lacerta viridis viridis (Laur.) in Brandenburg (Germany) and compare the observed variation to other edge and central populations within the northern species range. We demonstrate that the northernmost edge populations contain less genetic variation in comparison to the central population. However, there were no observable significant differences to the other edge population included in this study. Surprisingly, we observed a high genetic differentiation in a small geographical range between the three endangered populations in Brandenburg, which can be explained by processes like fragmentation, isolation, genetic drift and small individual numbers within these populations. We also detected unique genetic variants (alleles), which only occurred in these populations, despite a low overall genetic variation. This study demonstrates the potential of fast evolving markers assessing the genetic status of endangered populations with a high resolution. It also illustrates the need for a comparative analysis of different regions within the species range, achieving a more exact interpretation of the genetic variation in endangered populations. This will aid future management decisions in the conservation of genetic diversity in threatened species.