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Low floristic richness of afro-alpine vegetation of Mount Kenya is related to its small area

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Abstract

Diversity patterns of tropical alpine vegetation is poorly studied. We estimated vascular plant floristic richness for two typical afro-alpine communities in Mount Kenya using a series of nested plots sized from 25 to 100 m2. The α-diversity was low for all plot sizes (4.8–7.8 and 12.8 species per one and 100 m2, respectively). Comparative analysis of α-, β- and γ-diversity across 22 plant communities from five Mountain regions (Mount Kenya, European Alps, Caucasus, Tibet, New Zealand Alps) revealed that area of mountain system was the only significant variable shaping the local richness; this effect became stronger with increasing spatial scale. Beta-diversity, by contrast, showed neither latitudinal trends nor significant correlation with other geographical or climatic variables. We conclude that the total area of mountain system is one of the main factors determining the regional species pool and, ultimately, the local diversity of alpine plant communities (the “echo-effect”). Small area and isolation of Mt. Kenya are considered as the main reasons for low local richness of its afro-alpine vegetation.

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(after Onipchenko and Semenova 1995, 299–304)

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Acknowledgements

We thank M. Pärtel for useful notes for the paper. The work was supported by the governmental contract of MSU AAAA-A16-116021660037-7.

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Authors and Affiliations

  1. Biological Faculty, Moscow State Lomonosov University, Leninskie Gory 1-12, 119234, Moscow, Russia

    Vladimir G. Onipchenko, Natalia A. Kopylova, Alii M. Kipkeev, Tatiana G. Elumeeva, Andrei Azovsky & Sergei V. Dudov

  2. Department of Biological Sciences, University of Embu, P.O Box 6, Embu, 60100, Kenya

    Justine M. Nyaga

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  1. Vladimir G. Onipchenko
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  3. Alii M. Kipkeev
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Contributions

VGO, NAK, AMK and JMN designed the research, VGO, AMK and JMN conducted the research and VGO, NAK, AMK, TGE, AA, SVD and JMN analyzed the data and wrote the article.

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Correspondence to Justine M. Nyaga.

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Onipchenko, V.G., Kopylova, N.A., Kipkeev, A.M. et al. Low floristic richness of afro-alpine vegetation of Mount Kenya is related to its small area. Alp Botany 130, 31–39 (2020). https://doi.org/10.1007/s00035-019-00229-z

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