Landscape heterogeneity in landform and land use provides functional resistance to gene flow in continuous Asian black bear populations
Landscape heterogeneity in landform and land use provides functional resistance to gene flow in continuous Asian black bear populations
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地形和土地利用的景观异质性为连续的亚洲黑熊种群的基因流动提供了功能性抵抗
DOI：
10.1002/ece3.5102
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发表时间：
2019
影响因子：
2.6
通讯作者：
Uno Reina
中科院分区：
文献类型：
--
作者：
Ohnishi Naoki;Osawa Takeshi;Yamamoto Toshiaki;Uno Reina
遗传多样性是生物多样性最重要的方面之一，生境空间格局的变化往往受到人类活动的影响，我们进行了景观遗传分析，以确定哪些景观特征影响亚洲黑熊种群内的基因流，并确定潜在的过程。在基因流的基础上，我们估计了四个关于景观海拔的阻力参数：平均值，最高和最低之间的差异，标准差和个体间海拔的变异系数。然后，我们研究了不同的土地利用类型的电阻效应。结果与平均海拔的例外，我们发现，所有的参数表现出显着的关系与遗传距离，海拔的不均匀性提供功能性的基因流阻力。虽然我们没有发现景观障碍的证据（隔离屏障），但有迹象表明景观阻力（隔离阻力）。城市地区和农田被认为是导致基因流阻力的强有力因素，尽管也检测到了距离隔离。当我们检查成对雄性和成对雌性的基因流时，距离隔离和抗性隔离都按雌性对，雄性对，所有个体对。结论我们得出结论，景观阻力是可检测的，景观异质性的高对比度，它们对女性比男性更有影响力。开放实践这篇文章已经赢得了开放数据徽章，使公众可以数字共享重现报告结果所需的数据。数据可在https://doi.org/10.5061/dryad.gn0qf16上查阅。
ContextGenetic diversity is one of the most important facets of biological diversity, and changes in the spatial pattern of habitats, often modified by human activity, are believed to have affected the genetic diversity of resident natural populations.ObjectivesWe undertook a landscape genetic analysis in order to determine which landscape features influence gene flow within Asian black bear populations and to identify the underlying processes.MethodsIn our evaluation of gene flow, we estimated four parameters of resistance with regard to landscape elevation: the mean, the difference between the highest and lowest, the standard deviation, and the coefficient of variation of elevation among individuals. We then examined the resistance effect of different land use types.ResultsWith the exception of mean elevation, we found that all parameters showed a significant relationship with genetic distance, indicating that unevenness in elevation provides functional resistance to gene flow. Although we found no evidence of landscape barriers (isolation‐by‐barrier), there was an indication of landscape resistance (isolation‐by‐resistance). Urban area and farmland are suggested to be the strong factors contributing to the resistance to gene flow, even though isolation‐by‐distance was also detected. When we examined gene flow for pairs of males and pairs of females, both isolation‐by‐distance and isolation‐by‐resistance were stronger in order of female pairs, male pairs, all individual pairs.ConclusionsWe conclude that landscape resistance was detectable with a high contrast in landscape heterogeneity and they are more influential on females than males.OPEN PRACTICESThis article has earned an Open Data Badge for making publicly available the digitally‐shareable data necessary to reproduce the reported results. The data is available at https://doi.org/10.5061/dryad.gn0qf16.
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影响因子：
3.3
作者：
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通讯作者：
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DOI：
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