Biogeographic variation in skull morphology across the Kra Isthmus in dusky leaf monkeys.
Biogeographic variation in skull morphology across the Kra Isthmus in dusky leaf monkeys.
复制标题
暗叶猴克拉地峡头骨形态的生物地理变化。
DOI：
10.1111/jzs.12229
复制
发表时间：
2018
影响因子：
1.9
通讯作者：
D.
中科院分区：
文献类型：
--
作者：
Ito;T.;Koyabu;D.
尽管关于地理表型变异的潜在因素的文献越来越多，但人们对东南亚的地理障碍如何以及在多大程度上塑造了灵长类动物的形态变异知之甚少。我们的目的是通过将其分解为倾斜（纬度），非倾斜空间（克拉地峡北部和南部地区之间的离散差异）和环境相关成分来研究黑叶猴头骨形态的地理差异。我们采用几何形态测量测量53名成年男性标本从36个地点，覆盖地区北部和南部的克拉地峡。一个线性模型被用来测试区域（克拉地峡的南北），纬度和环境因素（温度和降雨量）对头骨的大小和形状的影响。在克拉地峡的北部和南部地区之间的头骨形状的变化的一部分不同适度，这种差异不能用纬度和环境因素来解释。然而，对于大小和形状的大多数变化，我们发现区域和两个环境因素的贡献有限。形状分化是无法解释的纬度和环境因素表明，黑叶猴可能经历了人口分工，由于克拉地峡周围的栖息地收缩。然而，这种分歧可能已被掩盖了随后的种群之间的基因流动栖息地恢复后。
Despite the growing literature on the underlying factors of geographical phenotypic variation, little is known about how and to what extent biogeographic barriers in South‐East Asia have shaped morphological variation in primates. We aimed to investigate the geographical variations in skull morphology in dusky leaf monkeys by decomposing them into clinal (latitudinal), non‐clinal spatial (discrete difference between regions north and south of the Isthmus of Kra), and environment‐related components. We applied geometric morphometrics to measure 53 adult male specimens from 36 localities, covering the regions both north and south of the Isthmus of Kra. A linear model was used to test the effects of region (north vs. south of the Isthmus of Kra), latitude, and environmental factors (temperature and rainfall) on the size and shape of skulls. A part of variation in skull shape differed moderately between the regions in the north and south of the Isthmus of Kra, and this difference cannot be explained by latitudinal and environmental factors. However, for size and the majority of variations in shape, we detected limited contributions of region and the two environmental factors. Shape differentiation that was unexplained by latitudinal and environmental factors suggests that dusky leaf monkeys may have experienced a population division due to habitat constriction around the Isthmus of Kra. However, this divergence probably has been obscured by subsequent gene flow between populations after habitat recovery.