Species distribution and population connectivity of deep-sea mussels at hydrocarbon seeps in the Gulf of Mexico.
Species distribution and population connectivity of deep-sea mussels at hydrocarbon seeps in the Gulf of Mexico.
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DOI：
10.1371/journal.pone.0118460
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Fisher CR
中科院分区：
文献类型：
--
作者：
Faure B;Schaeffer SW;Fisher CR
在墨西哥湾，碳氢化合物渗漏是广泛和不完整的，在广泛和重叠的深度和地理范围内的活跃渗漏上发现了六种含有bathymodiolin贻贝的共生体。我们使用线粒体基因来区分以前已知的和新发现的物种，并评估在墨西哥湾（GoM）的北方相同物种的种群之间的连接。我们的研究结果总体上验证了三种先前已知的GoM Bathymodiolus物种的形态学分布，尽管我们发现大约10%的形态学鉴定是不正确的，这导致了它们先前分配的深度和地理分布模式的一些不准确性。这些数据使我们能够确认，同域的两种Bathymodiolus在一个单一的补丁贻贝是常见的。本文报道了深海蜗管菌属Bathymodiolus sp. nov.与B密切相关。还发现了海克雷。这两个物种生活在相同的深度，但尚未发现在同域分布，都有小的有效人口规模。我们发现证据的遗传结构内的三个物种的Bathymodiolinae，我们有样本从多个网站，并建议在某些网站的人口有限的连接。尽管相对较小的样本量，遗传多样性指数表明最大的人口规模为B。childressi和Tamu i和最小的为B。heckerae和B. sp. nov.，属于墨西哥湾深海毛藻属。此外，我们发现了一个罕见的变种，表明最近的人口变化和人口扩张的四种bathymodiolins从墨西哥湾。
Hydrocarbon seepage is widespread and patchy in the Gulf of Mexico, and six species of symbiont containing bathymodiolin mussels are found on active seeps over wide and overlapping depth and geographic ranges. We use mitochondrial genes to discriminate among the previously known and a newly discovered species and to assess the connectivity among populations of the same species in the northern Gulf of Mexico (GoM). Our results generally validate the morphologically based distribution of the three previously known GoM species of Bathymodiolus, although we found that approximately 10% of the morphologically based identifications were incorrect and this resulted in some inaccuracies with respect to their previously assigned depth and geographical distribution patterns. These data allowed us to confirm that sympatry of two species of Bathymodiolus within a single patch of mussels is common. A new species of bathymodiolin, Bathymodiolus sp. nov., closely related to B. heckerae was also discovered. The two species live at the same depths but have not been found in sympatry and both have small effective population sizes. We found evidence for genetic structure within populations of the three species of Bathymodiolinae for which we had samples from multiple sites and suggest limited connectivity for populations at some sites. Despite relatively small sample sizes, genetic diversity indices suggest the largest population sizes for B. childressi and Tamu fisheri and the smallest for B. heckerae and B. sp. nov. among the GoM bathymodiolins. Moreover, we detected an excess of rare variants indicating recent demographic changes and population expansions for the four species of bathymodiolins from the Gulf of Mexico.
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影响因子：
2.4
作者：
CRADDOCK, C;HOEH, WR;VRIJENHOEK, RJ
通讯作者：
VRIJENHOEK, RJ
影响因子：
2.6
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Excoffier, Laurent;Laval, Guillaume;Schneider, Stefan
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Schneider, Stefan
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Bierne N
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1.6
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Arellano, Shawn M.;Young, Craig M.
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4.5
作者：
Bergquist, DC;Fleckenstein, C;Fisher, CR
通讯作者：
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