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Diversity, distribution and host-species associations of epiphytic orchids in Nepal

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    0472393 - BÚ 2017 RIV NL eng J - Journal Article
    Timsina, B. - Rokaya, Maan Bahadur - Münzbergová, Zuzana - Kindlmann, P. - Shrestha, B. - Bhattarai, B. - Raskoti, B. B.
    Diversity, distribution and host-species associations of epiphytic orchids in Nepal.
    Biodiversity and Conservation. Roč. 25, č. 13 (2016), s. 2803-2819. ISSN 0960-3115
    Institutional support: RVO:67985939
    Keywords : species richness * host * Nepal Himalaya
    Subject RIV: EF - Botanics
    Impact factor: 2.265, year: 2016

    We recorded 141 species of orchids growing on 192 host species. The five localities significantly differed in orchid diversity and abundance. The number of orchid individuals per host species significantly increased with increasing number of host individuals. Species richness, abundances, occupancy of orchid species on host species and composition of orchids varied across the localities. Species richness and abundance was significantly higher on hosts in the higher strata and differed between families of host species. Abundance was higher on evergreen hosts. Composition of orchid communities are also associated with host characteristics, such as habit (shrub/tree/climber), bark texture, nature (deciduous/evergreen) and the plant families of host species. This study revealed a high diversity of epiphytic orchids in the localities studied and strong associations between the orchids and their hosts. Future studies looking at the relationships between epiphyte communities and host characteristics need to identify relationships at a wider scale in order to determine whether they are really general rather than site-specific.
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