Dry grasslands of the central valleys of the Alps from a European perspective: the example of Ausserberg (Valais, Switzerland)

Avtorji

  • Jürgen Dengler
  • Stefan Widmer
  • Eline Staubli
  • Manuel Babbi
  • Jamyra Gehler
  • Daniel Hepenstrick
  • Ariel Bergamini
  • Regula Billeter
  • Steffen Boch
  • Sven Rohrer
  • Iwona Dembicz

Ključne besede:

biodiversity, Brachypodietalia pinnati, dry grassland, Festucetalia valesiacae, Festuco-Brometea, inner-alpine dry valley, Stipo pulcherrimae-Festucetalia pallentis, vegetation classification

Povzetek

The upper Rhone valley in the Swiss canton of Valais is one of the driest and most continental of the inner-alpine valleys and harbours a rich xerothermic flora. We studied syntaxonomy and ecology of dry grasslands and their species richness patterns. In 2018 we recorded 28 vegetation plots (10 m2) and three nested-plot series of 0.0001 to 100 m2 on the south-facing slopes above the village of Ausserberg. Mean richness of all species ranged from 1.7 on 1 cm2 to 47.3 on 100 m2, with little contribution of bryophytes and lichens. The species-area relationship for total richness closely followed a power function. Modified TWINSPAN yielded a three-cluster solution, which could easily be matched with three orders of the class Festuco-Brometea: Stipo pulcherrimae-Festucetalia pallentis (xeric, rocky), Festucetalia valesiacae (xeric, non-rocky) and Brachypodietalia pinnati (meso-xeric). The subdivision of the xeric types into two orders is new for Swiss dry grasslands, where these types up to now had been joined in a single alliance Stipo-Poion within the Festucetalia valesiacae.

Prenosi

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Kako citirati

Dengler, J., Widmer, S., Staubli, E., Babbi, M., Gehler, J., Hepenstrick, D., Bergamini, A., Billeter, R., Boch, S., Rohrer, S., & Dembicz, I. (2019). Dry grasslands of the central valleys of the Alps from a European perspective: the example of Ausserberg (Valais, Switzerland). Hacquetia, 18(2). Pridobljeno od https://ojs.zrc-sazu.si/hacquetia/article/view/7538

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