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《Acta Botanica Yunnanica》 2001-01
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Phytogeography of Quercus subg.Cyclobalanopsis

LUO Yan,ZHOU Zhe-Kun (Kunming Insititute of Botany, Chinese Academy of Sciences,Kunming 650204, China)  
Quercus subg. Cyclobalanopsis(Oerst.) Schne id. is an important constituent of broad leaved evergreen forests in subtropical and tropical regions of Asia. It contains 122 species distrbuted primarily with in the Tropical Asia (Indo-Malaysia) phytogeographic province. A number of speci es were analyzed to develop a biogeographical and phytogenetic context for the d iversity within subg. Cyclobalanopsis. Southern China and the north northern part of the Indo-Chine Peninsula show the highest species diversity and may be considered the two centers of diversity. A number of species in Malaysia were ob served to have some plesiomorphic characters, and this region may be considered the center of origin and a key area of endemism. On the island of Borneo, the ar ea of Kalimantan is richest in endemic species and the fossil species record res emble this fact. In contrast, the endemic species from Hainan and Taiwan are mor e derived. The endemic species of Yunnan represent a mixture of neoendemics and paleoendemics. The formation of patterns of endemism in Cyclobalanopsis is due p rimarily to geographical isolation and the complex history of climatic and geolo gical changes. Also we have discussed vicariance of Cyclobalanopsis: Q.glauca Q.schottkyana, Q.gilva Q.delavayi, Q.sessifolia Q.augustinii are vicariance species between Sino-Japan and Sino-Himalaya.
【Fund】: 国家自然科学基金! 重点资助项目(No.39930020);; 中国科学院特别支持费!(STZ-1-04)资助
【CateGory Index】: Q948
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