Seeber, E; Winterfeld, G; Sharbel, T; Durka, W; Hensen, I; Liu, J; Miehe, G; Wesche, K: How Kobresia pygmaea maintains dominance, A study on generative reproduction, clonal growth and polyploidy
Poster, 7th Sino-German Workshop on Tibetan Plateau Research, Hamburg: 03.03.2011 - 06.03.2011

The Cyperaceae Kobresia pygmaea is the most abundant species of the Tibetan Plateau covering ca. 450.000 km2 and an altitudinal range of 2500 m asl. The factors leading to the dominance of a single species over such a wide range of environmental conditions are still unclear. An effective reproduction system is a precondition for this dominance, be it by generative reproduction and/or extensive clonal growth after establishment. Polyploids are reported to have a wider tolerance to harsh environments and has frequently been found in sedges, e.g. the alpine species K. simpliciuscula is reported to be tetra- or even hexaploid. Due to small chromosomes with diffuse centromeres neither the ploidy level nor the basic chromosome number in K. pygmaea are known.

Letzte Änderung 01.04.2011