De ontwikkeling van de natuurlijke vegetatie in de Wieringermeer-polder, de eerste groote droogmakerij van de Zuiderzee

摘要: The reclaimed sea bottom grew first a felt of blue and silicous algae, except in ditches. In very moist places unusual associations green algae developed with some sulphur purple bacteria. subsequent introduction plants to the new land was promoted by water, air only for few anemochores, birds slight extent men sometimes. Of 261 naturally dispersed species about 50 could develop socially, them over larger areas. Most were nitriphilous, indicating importance N establishment. Dominance studied Scandinavian method plant sociology. Species distribution curves (Jaccard) constructed. Natural selection occurred mainly among seedlings. reaction most important halophytes glycophytes salt concentration examined. Musci Hepaticae, although wind-distributed, formed after heavy leaching rainfall. Fungi appeared year. Finally fauna usefulness these investigations considered.