Adaptionen und Lebensstrategien in basiphytischen Gesteinsmoosgesellschaften am Nordrand der Schwäbischen Alb (Süddeutschland)
Some basiphytic bryophyte rock communities from the northern border of the Schwäbische Alb are presented. They were classified syntaxonomically and synsystematically, and analyzed according to the "life-strategy" concept. Beside life-forms, this concept includes morphological and anatomical characters, vegetative and sexual reproduction, spore dispersal, and habitat features. Altogether 9 communities are described, which show a markedly ecological zonation with respect to photo- and thermophytic, respectively scio- and hygrophytic habitat conditions. This zonation also is reflected by the different lifeforms, a xerophytic and sciophytic complex of characters (syndrome), and by different lifestrategies. Thermo- and photophytic communities are dominated by cushion and short turf forming, perennial and short-lived Colonists, which are replaced in shady habitats by weft and mat forming Perennial shuttle species with passive reproduction and "passive" Perennial stayers. The scio- and hygrophytic communities are characterized mainly by fan forming Perennial stayers with sexual reproduction. The quantitative evaluation of this complex of characters (determination of the mean percent cover values of each character) by regarding the whole communities give a good impression of the life-strategies, which evolved under similar ecological conditions.