Life strategies of Pannonian loess cliff bryophyte communities: Studies on the cryptogamic vegetation of loess cliffs, VIII
A life strategy analysis of four Pannonian loess cliff communities (Hilpertio velenovskyi-Pterygoneuretum compacti typicum, Hilpertio velenovskyi-Pterygoneuretum compacti crossidietosum crassinervis, Didymodon cordatus-Grimaldion fragrantis base community, Aloinetum rigidae) was conducted, based on a plant sociological analysis. Typical for the drought-resistant, xerophytic communities are xerotolerant short turf-forming acrocarpous 'generative' colonists and solitary plants, with a regular sporophyte production, and small spores, providing chance dispersal for colonizing the various loess cliffs in the Pannonian basin. Co-dominant are 'vegetative' colonists. The survivial of these species is presumably archieved by asexual diaspores (axillary gemmae, buds), which are present in the diaspore bank. They allow a fast re-establishment of the communities after disturbance. In addition, some of the character and differential species of the communities belong to the annual or short lived shuttle strategy, indicating short-range dispersal (engy- to achorous tendency) by large spores. As in the previous 'functional type', habitat maintenance and reestablishment here is provided by achory and the diaspore bank. The analysis impressively indicates the relationships between site ecology, life forms and life strategies.