Climate – grazing interactions in Mongolian rangelands: Effects of grazing change along a large-scale environmental gradient

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Julian Ahlborn - , Leibniz Centre for Agricultural Landscape Research, Leuphana Universität Lüneburg, Senckenberg Gesellschaft für Naturforschung (Autor:in)
  • Henrik von Wehrden - , Leuphana Universität Lüneburg (Autor:in)
  • Birgit Lang - , Friedrich-Schiller-Universität Jena (Autor:in)
  • Christine Römermann - , Friedrich-Schiller-Universität Jena, Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig (Autor:in)
  • Munkhzul Oyunbileg - , Mongolian Academy of Sciences (Autor:in)
  • Batlai Oyuntsetseg - , National University of Mongolia (Autor:in)
  • Karsten Wesche - , Internationales Hochschulinstitut (IHI) Zittau, Professur für Biodiversität der Pflanzen (g.B. Senckenberg), Senckenberg Gesellschaft für Naturforschung, Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig (Autor:in)

Abstract

There are still major gaps in our understanding of rangeland degradation. Assessing the interactions between climate and grazing effects could help to explain what unifies and separates rangelands, and may therefore promote a more sustainable management of livestock. We studied 15 local land-use transects along a 600 km long climatic gradient in Central Asia to test the hypothesis that grazing effects differ between relatively moist equilibrium (EQ) and dry non-equilibrium (NEQ) rangeland systems. We analysed plant community composition, species diversity and indicator species for different grazing intensities. We found pronounced differences in community composition along our climate gradient, revealed climate-related grazing effects on richness, responses of Simpson's diversity, and also found different grazing indicator species along the larger transect. We conclude that in NEQ rangelands, grazing effects are limited to sacrifice zones and environmental filtering dominates vegetation composition. With increasing precipitation, resource availability gains in importance leading to more complex communities dominated by grazing-tolerant species under EQ dynamics. Hints for xerophytization in the transition zone between EQ and NEQ highlight the vulnerability of rangelands that temporally shift from one state to the other. This calls for extra care in the management of livestock numbers in these transition areas.

Details

OriginalspracheEnglisch
Aufsatznummer104043
FachzeitschriftJournal of arid environments
Jahrgang173
PublikationsstatusVeröffentlicht - Feb. 2020
Peer-Review-StatusJa

Schlagworte

Schlagwörter

  • DCA, Gradients, Grazing, Indicator species analysis, Non-equilibrium rangelands, Species diversity, Xerophytization