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Scale- and taxon-dependent patterns of plant diversity in steppes of Khakassia, South Siberia (Russia)

Title data

Polyakova, Mariya A. ; Dembicz, Iwona ; Becker, Thomas ; Becker, Ute ; Demina, Olga N. ; Ermakov, Nikolai ; Filibeck, Goffredo ; Guarino, Riccardo ; Janišová, Monika ; Jaunatre, Renaud ; Kozub, Łukasz ; Steinbauer, Manuel ; Suzuki, Kohei ; Dengler, Jürgen:
Scale- and taxon-dependent patterns of plant diversity in steppes of Khakassia, South Siberia (Russia).
In: Biodiversity and Conservation. Vol. 25 (2016) Issue 12 . - pp. 2251-2273.
ISSN 1572-9710
DOI: https://doi.org/10.1007/s10531-016-1093-y

Official URL: Volltext

Abstract in another language

The drivers of plant richness at fine spatial scales in steppe ecosystems are still not sufficiently understood. Our main research questions were: (i) How rich in plant species are the natural steppes of Southern Siberia compared to natural and semi-natural grasslands in other regions of the Palaearctic? (ii) What are the main environmental drivers of the diversity patterns in these steppes? (iii) What are the diversity-environment relationships and do they vary between spatial scales and among different taxonomic groups? We sampled the steppe vegetation (vascular plants, bryophytes and lichens) in Khakassia (Russia) with 39 nested-plot series (0.0001–100-m² plot size) and 54 additional 10-m² quadrats across the regional range of steppe types and measured various environmental variables. We measured β-diversity using z-values of power-law species-area relationships. GLM analyses were performed to assess the importance of environmental variables as predictors of species richness and z-value. Khakassian steppes showed both high α- and β-diversity. We found significant scale dependence for the z-values, which had their highest values at small spatial scales and then decreased exponentially. Total species richness was controlled predominantly by heat load index, mean annual precipitation, humus content and soil skeleton content. The positive role of soil pH was evident only for vascular plant species richness. Similar to other studies, we found that the importance of environmental factors strongly differed among taxonomic groups and across spatial scales, thus highlighting the need to study more than one taxon and more than one plot size to get a reliable picture.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER135726
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Ecology
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 05 Aug 2016 09:17
Last Modified: 18 Nov 2016 07:55
URI: https://eref.uni-bayreuth.de/id/eprint/33845