Geographic distance affects dispersal of the patchy distributed greater long-tailed hamster (Tscherskia triton).
Geographic distance affects dispersal of the patchy distributed greater long-tailed hamster (Tscherskia triton).
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地理距离影响分散分布的大长尾仓鼠（Tscherskia triton）的分散
DOI：
10.1371/journal.pone.0099540
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Xu L
中科院分区：
文献类型：
--
作者：
Xue H;Zhong M;Xu J;Xu L
扩散是生态学中的一个基本过程，影响种群的遗传结构和生存能力。了解可变因素如何影响种群的扩散正在成为动物生态学中的一个重要问题。到目前为止，地理距离和地理障碍通常被认为是影响扩散的主要因素，但它们的影响因条件不同而不同。一般来说，地理障碍比地理距离对扩散的影响更大。然而，在迅速扩大的人口中，地理障碍对扩散的影响小于地理距离。地理距离和地理障碍对具有斑块分布的低密度人口的影响知之甚少。利用10个微卫星基因座，对中国平原北部饶阳县、关县和顺义县3个斑块分布的长尾仓鼠群体的遗传结构进行了研究。结果表明：(1)3个地理种群存在较高的遗传多样性和分化，且呈斑块状分布；(2)北京市区和沱沱河流域3个地理种群间存在基因流动，可能制约动物的扩散；(3)基因流动与地理距离呈负相关，而遗传距离呈正相关。我们的结果表明，物理屏障的影响是有条件的，包括屏障能力或个体潜在的扩散能力。地理距离也是影响斑块分布地理种群扩散的重要因素。因此，在这项研究中，基因流动在平衡地理障碍的影响方面是有效的，即使是在相对较长的距离。
Dispersal is a fundamental process in ecology influencing the genetic structure and the viability of populations. Understanding how variable factors influence the dispersal of the population is becoming an important question in animal ecology. To date, geographic distance and geographic barriers are often considered as main factors impacting dispersal, but their effects are variable depending on different conditions. In general, geographic barriers affect more significantly than geographic distance on dispersal. In rapidly expanding populations, however, geographic barriers have less effect on dispersal than geographic distance. The effects of both geographic distance and geographic barriers in low-density populations with patchy distributions are poorly understood. By using a panel of 10 microsatellite loci we investigated the genetic structure of three patchy-distributed populations of the Greater long-tailed hamster (Tscherskia triton) from Raoyang, Guan and Shunyi counties of the North China Plain. The results showed that (i) high genetic diversity and differentiation exist in three geographic populations with patchy distributions; (ii) gene flow occurs among these three populations with physical barriers of Beijing city and Hutuo River, which potentially restricted the dispersal of the animal; (iii) the gene flow is negatively correlated with the geographic distance, while the genetic distance shows the positive correlation. Our results suggest that the effect of the physical barriers is conditional-dependent, including barrier capacity or individual potentially dispersal ability. Geographic distance also acts as an important factor affecting dispersal for the patchy distributed geographic populations. So, gene flow is effective, even at relatively long distances, in balancing the effect of geographic barrier in this study.
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影响因子：
6.3
作者：
Gerlach, G;Musolf, K
通讯作者：
Musolf, K
影响因子：
1.7
作者：
Dong, Jingping;Li, Chuanhai;Zhang, Zhibin
通讯作者：
Zhang, Zhibin
影响因子：
4.9
作者：
Goudet, J;Perrin, N;Waser, P
通讯作者：
Waser, P
影响因子：
2.5
作者：
Billot, C;Engel, CR;Valero, M
通讯作者：
Valero, M
影响因子：
4.9
作者：
Berthier, K.;Charbonnel, N.;Cosson, J. -F.
通讯作者：
Cosson, J. -F.