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    National Tsing Hua University Institutional Repository > 理學院 > 統計學研究所 > 期刊論文 >  Diversity and geographic distribution of ciliates (Protista : Ciliophora)

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/54111

    Title: Diversity and geographic distribution of ciliates (Protista : Ciliophora)
    Authors: Foissner, Wilhelm;Chao, Anne;Katz, Laura A.
    教師: 趙蓮菊
    Date: 2008
    Publisher: Springer Verlag
    Relation: BIODIVERSITY AND CONSERVATION,Volume: 17,Issue: 2,Pages: 345-363,Published: FEB 2008
    N. SP
    Abstract: About 4,500 free-living ciliate morphospecies have been described, applying an average synonymy rate of 20%. We estimate that 83-89% of the ciliate diversity is still undescribed, using the following probabilities: detailed habitat studies suggest that the described number of morphospecies must be doubled: 4,500 -> 9,000; this figure has to be increased by about 50% due to species with similar interphase morphology but different resting cysts: 9,000 -> 13,500; the genetic and molecular data suggest that this value must be doubled or trebled: 13,500 -> 27,000 to 40,000 free-living, biological ciliate species. The knowledge on geographic distribution of ciliates heavily depends on flagship species and statistical analyses because reliable faunistic studies are rare and molecular data are still in its infancy. We present a list of 52 ciliate flagship species as a testable hypothesis, i.e., the hypothesis of restricted distribution of certain ciliate species must be refused when a considerable number of them is found in all or most biogeographic regions. Flagship species and statistical analyses consistently show Gondwanan and Laurasian ciliate communities, suggesting that the split of Pangaea deeply influenced ciliate distribution and rare species play a key role in geographic differentiation. However, there is also substantial evidence for continental, regional, and local endemism of free-living ciliates. The molecular studies usually show a high level of genetic diversity underlying ciliate morphospecies, suggesting that morphologic and molecular evolution may be decoupled in many ciliate species. Molecular studies on ciliate biogeography are at variance, possibly because most are still focusing on single molecular markers. In sum, the data indicate that ciliate biogeography is similar to that of plants and animals, but with an increased proportion of cosmopolites, favouring the moderate endemicity model.
    URI: http://www.springerlink.com/
    Appears in Collections:[統計學研究所] 期刊論文

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