Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales.
Distribution of genetic diversity reveals colonization patterns and philopatry of the loggerhead sea turtles across geographic scales.
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DOI：
10.1038/s41598-020-74141-6
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发表时间：
2020-10-22
影响因子：
4.6
通讯作者：
Eizaguirre C
中科院分区：
文献类型：
--
作者：
Baltazar-Soares M;Klein JD;Correia SM;Reischig T;Taxonera A;Roque SM;Dos Passos L;Durão J;Lomba JP;Dinis H;Cameron SJK;Stiebens VA;Eizaguirre C
了解濒危物种遗传多样性分布的过程是现代保护生物学的一个目标。具体而言，殖民和扩散事件在整个物种进化史中的作用往往仍然难以捉摸。红海龟（Caretta caretta）由于其迁徙性质和喜水行为而面临着多重保护挑战。在这里，使用4207 mtDNA序列，我们分析了殖民模式和分布的遗传多样性内的一个主要的海洋盆地（大西洋），一个区域的栖息地（卡波佛得角群岛）和当地的岛屿（博阿维斯塔岛，卡波佛得角）。使用假设驱动的群体遗传模型进行的数据分析表明，大西洋的殖民化发生在两个不同的浪潮中，每个浪潮对应于一个主要的mtDNA谱系。我们建议最古老的血统通过巴拿马地峡进入盆地，并依次在巴西，卡波维德和美国和墨西哥地区建立聚合。第二个血统通过好望角进入大西洋，在地中海建立殖民地，从那时起，重新殖民大西洋已经存在的栖息地。在卡波佛得角的水平，我们揭示了一个不对称的基因流保持联系，在岛屿特定的筑巢群体，尽管显着的遗传结构。这一结构源于女性的嗜水行为，这可以通过博阿维斯塔岛上仅几公里远的海滩之间微弱但显著的差异进一步发现。在不同的地理尺度上探索地理过程，提高了我们对高度洄游喜水物种复杂的进化历史的理解。揭开过去的面纱有助于设计保护方案，以正确的管理规模为目标，以保持物种的进化潜力。
Understanding the processes that underlie the current distribution of genetic diversity in endangered species is a goal of modern conservation biology. Specifically, the role of colonization and dispersal events throughout a species’ evolutionary history often remains elusive. The loggerhead sea turtle (Caretta caretta) faces multiple conservation challenges due to its migratory nature and philopatric behaviour. Here, using 4207 mtDNA sequences, we analysed the colonisation patterns and distribution of genetic diversity within a major ocean basin (the Atlantic), a regional rookery (Cabo Verde Archipelago) and a local island (Island of Boa Vista, Cabo Verde). Data analysis using hypothesis-driven population genetic models suggests the colonization of the Atlantic has occurred in two distinct waves, each corresponding to a major mtDNA lineage. We propose the oldest lineage entered the basin via the isthmus of Panama and sequentially established aggregations in Brazil, Cabo Verde and in the area of USA and Mexico. The second lineage entered the Atlantic via the Cape of Good Hope, establishing colonies in the Mediterranean Sea, and from then on, re-colonized the already existing rookeries of the Atlantic. At the Cabo Verde level, we reveal an asymmetric gene flow maintaining links across island-specific nesting groups, despite significant genetic structure. This structure stems from female philopatric behaviours, which could further be detected by weak but significant differentiation amongst beaches separated by only a few kilometres on the island of Boa Vista. Exploring biogeographic processes at diverse geographic scales improves our understanding of the complex evolutionary history of highly migratory philopatric species. Unveiling the past facilitates the design of conservation programmes targeting the right management scale to maintain a species’ evolutionary potential.
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影响因子：
4.1
作者：
Eizaguirre C;Baltazar-Soares M
通讯作者：
Baltazar-Soares M
影响因子：
5.8
作者：
Cornuet, Jean-Marie;Pudlo, Pierre;Estoup, Arnaud
通讯作者：
Estoup, Arnaud
DOI：
10.1016/j.jembe.2012.10.011
发表时间：
2013-01-01
影响因子：
2
作者：
Clusa, Marcel;Carreras, Carlos;Cardona, Luis
通讯作者：
Cardona, Luis
影响因子：
3.3
作者：
BOWEN, BW;KAMEZAKI, N;AVISE, JC
通讯作者：
AVISE, JC
影响因子：
6.3
作者：
CARR A
通讯作者：
CARR A