Phylogeography and colonization history of Lesser Black‐backed Gulls (Larus fuscus) as revealed by mtDNA sequences
Phylogeography and colonization history of Lesser Black‐backed Gulls (Larus fuscus) as revealed by mtDNA sequences
复制标题
mtDNA 序列揭示小黑背鸥 (Larus fuscus) 的系统发育地理学和定殖历史
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Helbig
中科院分区：
文献类型：
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作者：
D. Liebers;A. Helbig
摘要由于气候振荡幅度的差异，生活在北方纬度的物种比生活在南方纬度的物种更频繁和更严重的范围振荡。因此，平均而言，北方的种群应该比更南方的密切相关的类群在遗传学上更年轻，具有更少的地理结构。为了验证这些预测，我们研究了西北古北界小黑背鸥（Larus fuscus group [=LBBG]，5个分类群）的线粒体遗传种群结构，这些小黑背鸥在从冰岛到泰梅尔半岛的温带到寒带纬度繁殖。将结果与先前获得的结果进行比较（Liebers等人，2001年）。摩尔Ecol.10：2447）为更南方繁殖的黄腿鸥（Larus cachinnans group，六个分类群从大西洋群岛到蒙古）。线粒体控制区的高变区I（HVR-I）的序列显示，与黄腿鸥相比，LBBG的内部和之间的序列差异较小，遗传变异较小，单倍型发生较浅，地理结构较差。北方五个类群之间的单倍型频率形成了一个阶梯式的渐变群，在heuglini型和fuscus型之间存在明显的基因流限制，可能表明与（部分？）生殖隔离西方形式的LBBG，其中线粒体基因流似乎不受限制，显示遗传的迹象，冰后期范围扩大和人口增长。Larus fuscus群起源于一个类似cachinnans的祖先种群，可能在阿拉罗里海盆地，并在古北界从东（西伯利亚西北部）向西传播。
Abstract Because of the differential amplitude of climatic oscillations, species living at northern latitudes are subject to more frequent and more severe range oscillations than species at southern latitudes. As a consequence, northern populations should, on average, be phylogenetically younger and possess less phylogeographical structure than closely related taxa further south. To test these predictions, we studied the mitochondrial‐genetic population structure of NW Palearctic Lesser Black‐backed Gulls (Larus fuscus group [=LBBG], five taxa) breeding at temperate to boreal latitudes from Iceland to the Taimyr Peninsula. Results were compared with those previously obtained (Liebers et al. 2001. Mol. Ecol.10: 2447) for more southerly breeding Yellow‐legged Gulls (Larus cachinnans group, six taxa from the Atlantic Islands to Mongolia). Sequences of the hypervariable region I (HVR‐I) of the mitochondrial control region revealed low within‐ and between‐taxon sequence divergence, little genetic variation, a shallow haplotype phylogeny and poor phylogeographical structure in LBBGs compared with Yellow‐legged Gulls. Haplotype frequencies among the five northern taxa formed a stepped cline with significant gene flow restriction between the forms heuglini and fuscus, probably indicating a secondary contact with (partial?) reproductive isolation. Western forms of LBBG, among which mitochondrial gene flow appears unrestricted, show genetic signs of postglacial range expansion and population growth. The Larus fuscus group is derived from a cachinnans‐like ancestral population, probably in the Aralo‐Caspian basin, and spread from east (NW Siberia) to west within the Palearctic.
影响因子：
3.3
作者：
Yunxin Fu
通讯作者：
Yunxin Fu
影响因子：
3.3
作者：
M. Slatkin;R. Hudson
通讯作者：
M. Slatkin;R. Hudson