Aquatic macrophytesBrackish water typologyEstuariesLittoral environmentsMacro-algaeMacroinvertebratesSalt marshesSeagrassesTurbellariansSTRATIOTES-ALOIDES LWASTING-DISEASECHROMOSOME-NUMBERSZOSTERA-MARINAMACROPHYTE COMMUNITIESPRELIMINARY REVISIONSOFT WATERSRIVER RHINEWADDEN SEANETHERLANDS