维多利亚湖晚更新世干涸与丽鱼科鱼类的快速进化

Late Pleistocene Desiccation of Lake Victoria and Rapid Evolution of Cichlid Fishes.

作者信息

Johnson TC, Scholz CA, Talbot MR, Kelts K, Ricketts RD, Ngobi G, Beuning K, Ssemmanda I, McGill JW

机构信息

T. C. Johnson and R. D. Ricketts, Large Lakes Observatory, University of Minnesota, Duluth, MN 55812, USA. C. A. Scholz, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL 33149, USA. M. R. Talbot, Geological Institute, University of Bergen, 5007 Bergen, Norway. K. Kelts, G. Ngobi, K. Beuning, Limnological Research Center, University of Minnesota, Minneapolis, MN 55455, USA. I. Ssemmanda, Department of Geology, Makerere University, Post Office Box 7062, Kampala, Uganda. J. W. McGill, Embangweni Hospital, Post Office Box 7, Embangweni, Malawi.

出版信息

Science. 1996 Aug 23;273(5278):1091-3. doi: 10.1126/science.273.5278.1091.

DOI:10.1126/science.273.5278.1091

PMID:8688092

Abstract

Lake Victoria is the largest lake in Africa and harbors more than 300 endemic species of haplochromine cichlid fish. Seismic reflection profiles and piston cores show that the lake not only was at a low stand but dried up completely during the Late Pleistocene, before 12,400 carbon-14 years before the present. These results imply that the rate of speciation of cichlid fish in this tropical lake has been extremely rapid.

摘要

维多利亚湖是非洲最大的湖泊，拥有300多种丽鱼科的特有物种。地震反射剖面和活塞岩芯显示，该湖不仅处于低水位，而且在距今12400年碳-14年代之前的晚更新世就完全干涸了。这些结果表明，这个热带湖泊中丽鱼科鱼类的物种形成速度极快。