Time and space: genetic structure of the cohorts of the common sea urchin Paracentrotus lividus in Western Mediterranean
Time and space: genetic structure of the cohorts of the common sea urchin Paracentrotus lividus in Western Mediterranean
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DOI：
10.1007/s00227-011-1799-z
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发表时间：
2012-01-01
期刊：
影响因子：
2.4
通讯作者：
Turon, X.
中科院分区：
文献类型：
--
作者：
Calderon, I.;Pita, Lucia;Turon, X.
定居和补充的时空变异、生命史第一个阶段的高死亡率以及选择可能决定小规模长寿海洋无脊椎动物群体的遗传结构。我们对常见的地中海海胆 Paracentrotus lividus 进行了时空分析，以确定不同尺度群体的遗传结构。在托萨德马尔（地中海西北部），招募工作连续 5 个春季（2006 年至 2010 年）进行。 2008 年春季，在伊比利亚东部和南部海岸的 6 个地点，相距 200 至 1,100 多公里的地方收集了新兵和两岁的个体。所有队列都呈现出基于 mtCOI 片段的高度遗传多样性。结果显示，2006年，时间监测的遗传同质性明显，空间结构程度较低。2008年，加上该地区通常的环流模式出现异常，研究的南方人群的遗传结构发生了明显变化，出现了许多私人单倍型。这一事实凸显了点事件在更新种群基因构成中的重要性，这只能通过分析耦合时间和空间视角的队列结构来检测。
Spatio-temporal variability in settlement and recruitment, high mortality during the first life-history stages, and selection may determine the genetic structure of cohorts of long-lived marine invertebrates at small scales. We conducted a spatial and temporal analysis of the common Mediterranean Sea urchin Paracentrotus lividus to determine the genetic structure of cohorts at different scales. In Tossa de Mar (NW Mediterranean), recruitment was followed over 5 consecutive springs (2006-2010). In spring 2008, recruits and two-year-old individuals were collected at 6 locations along East and South Iberian coasts separated from 200 to over 1,100 km. All cohorts presented a high genetic diversity based on a fragment of mtCOI. Our results showed a marked genetic homogeneity in the temporal monitoring and a low degree of spatial structure in 2006. In 2008, coupled with an abnormality in the usual circulation patterns in the area, the genetic structure of the southern populations studied changed markedly, with arrival of many private haplotypes. This fact highlights the importance of point events in renewing the genetic makeup of populations, which can only be detected through analysis of the cohort structure coupling temporal and spatial perspectives.