Research on differentiation and speciation of the oceanic island endemics

doi:10.3969/j.jssn.1000-2006.2012.05.029

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2012, Vol. 36 ›› Issue (05): 148-154.doi: 10.3969/j.jssn.1000-2006.2012.05.029

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Research on differentiation and speciation of the oceanic island endemics

XU Weixiang, WANG Zhongsheng*, WANG Zhike, MA Yuanshan, YANG Linlu, AN Shuqing

Laboratory of Forest Ecology and Global Changes, School of Life Science, Nanjing University, Nanjing 210093, China

Online:2012-09-30 Published:2012-09-30

Abstract

Abstract: Due to the oceanic geographic isolation, distinctive distribution boundary, narrow distribution range and small population size, island endemics have become the model species for island biogeography research. According to the studies related to island endemics, we summarized the course of differentiation and speciation of the oceanic island endemics into four stages: migration into new islands, establishment of populations, enlargement of distribution regions and adaptive changes and/or radiations. There were five kinds of forces driving these processes: （1) the reduced gene flow by oceanic isolation; （2) multiple colonization from nearby islands or mainland; （3) adaptive radiation in different habitats；（4) differentiation caused by sudden geological events such as lava flow; （5) speciation conduced by bottleneck effect or founder effect. Though islands have rich diversity of endemics，these island species have greater tendency to be endangering or dying out than their continental conterparts because of genetic drift and small population effects. The combination of the species recovery program and the protection of habitat on ecosystem level will could promote the conservation of island endemics and ecosystems.

CLC Number:

Q941
Q951

XU Weixiang, WANG Zhongsheng*, WANG Zhike, MA Yuanshan, YANG Linlu, AN Shuqing. Research on differentiation and speciation of the oceanic island endemics[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2012, 36(05): 148-154.

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Research on differentiation and speciation of the oceanic island endemics

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