EVOLUTIONARY RELATIONSHIPS AMONG DEEP-SEA MYTILIDS (BIVALVIA, MYTILIDAE) FROM HYDROTHERMAL VENTS AND COLD-WATER METHANE SULFIDE SEEPS
EVOLUTIONARY RELATIONSHIPS AMONG DEEP-SEA MYTILIDS (BIVALVIA, MYTILIDAE) FROM HYDROTHERMAL VENTS AND COLD-WATER METHANE SULFIDE SEEPS
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DOI：
10.1007/bf00349456
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发表时间：
1995-01-01
期刊：
影响因子：
2.4
通讯作者：
VRIJENHOEK, RJ
中科院分区：
文献类型：
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作者：
CRADDOCK, C;HOEH, WR;VRIJENHOEK, RJ
对深海热液喷口和冷水甲烷/硫化物渗漏处的贻贝进行的蛋白质电泳调查显示，有10个不同物种的电形态特征。从位于加拉帕戈斯裂谷、大西洋中脊和马里亚纳海盆的热液喷口，我们发现了四种糠虾。在墨西哥湾的三个冷水渗漏侧检测到另外六个物种。斑片状分布和时间稳定的渗漏可能提供了一个更大的机会mytilid多样化和持久性比通风口网站Nei的物种之间的遗传距离（D）相对较大（范围：0.528至无穷大）内和栖息地类型之间。这种明显的遗传分化程度表明该群体有一个相对古老的共同祖先。利用等位酶和形态学特征的距离瓦格纳和简约性分析构建系统发育树。从这两种方法获得的树拓扑结构支持：（1）的假设，一个渗出的祖先引起了深海热液喷口mytilis，（2）从浅水到深水栖息地的历史进展，和（3）从外部到内部本地化的细菌共生体的共同进化的进展。渗出mytild分类群是否构成并系群或复系群仍然没有解决。我们的系统发育假说也提供了一个基准的mytilid细菌共生体的系统发育。
A protein electrophoretic survey of mytilids inhabiting deep-sea hydrothermal vents and cold-water methane/sulfide seeps revealed electromorph patterns diagnostic of 10 distinct species. From hydrothermal vents located at sites on the Galapagos Rift, the Mid-Atlantic Ridge, and the Mariana Back Are Basin, we detected four species of mytilids. Six additional species were detected from three cold-water seep sides in the Gulf of Mexico. The patchy distribution and temporal stability of seeps may provide a greater opportunity for mytilid diversification and persistence than vent sites Nei's genetic distances (D) between species were relatively large (range: 0.528 to infinity) both within and among habitat types. This pronounced degree of genetic differentiation suggests a relatively ancient common ancestor for the group. Phylogenetic trees were generated using distance Wagner and parsimony analyses of allozyme and morphological characters. The tree topologies obtained from both methods support: (1) the hypothesis that a seep ancestor gave rise to the deep-sea hydrothermal vent mytilids, (2) a historical progression from shallow-water to deep-water habitats, and (3) a co-evolutionary progression from external to internal localization of bacterial symbionts. Whether the seep mytilid taxa constitute paraphyletic or polyphyletic groups remains un resolved. Our phylogenetic hypotheses also provide a benchmark for the phylogeny of mytilid bacterial symbionts.