Biogeography of Mariana Trough hydrothermal vent communities
摘要:
Although the Mariana Trough back-arc basin contains a spreading center geographically remote from the global mid-ocean ridge system, 59% of the 27 identified Mariana vent species (out of a total 30-31 species) show affinity at a generic level with the fauna of mid-ocean ridge vents and suggest a history of interchange between them. Other western Pacific back-arc spreading centers harbor vent communities, and preliminary evidence indicates the likelihood that there has been dispersal within this entire back-arc complex. The segments of the global mid-ocean ridge system that are closest to this western Pacific complex are the Juan de Fuca Ridge, 7600 km to the northeast, and the Southeast Indian Ridge, 3200 km to the south. However, two now-extinct portions of the mid-ocean ridge system were closer and could have allowed comparatively easy interchange 43 and 55 million years ago. Hydrothermal vents at isolated volcanoes, cold-water seeps and rotting whale carcasses are potential 'stepping stones' that might bridge larger gaps; however, there is little information to document their relative importance.
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DOI:
10.1016/0198-0149(91)90079-U
被引量:
年份:
1991
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