Keywords: Research & information: general ; Botany & plant sciences ; Biology, life sciences ; Research and information: general ; Botany and plant sciences ; charophyta ; Chara baueri ; species ecology ; species biogeography ; AFLP ; conservation ; genetic diversity ; river systems ; Stratiotes aloides ; wetland habitats ; revegetation ; submerged macrophytes ; floating macrophytes ; aquatic phanerogams ; charophytes ; seeding ; planting ; transplanting ; sediment transfer ; natural wetlands ; constructed wetlands ; lake management ; modelling ; carbon dioxide ; aquatic weeds ; respiration ; hypoxia ; Keddy Index ; submerged aquatic vegetation (SAV) ; Mediterranean flora ; aquatic flora ; carbon isotopes ; hydrophytes ; bioindicators ; inland waters ; water geochemistry ; Chara ; Nitella ; Tolypella ; Nitellopsis ; re-establishment ; nutrients ; herbivory ; Willdenowia ; Sardinia ; biogeography ; Chara zeylanica ; distribution ; ecology ; relic fern ; Mediterranean wetlands ; conservation status ; pteridophytes ; vegetation ; rice fields ; morphology ; haplostephanous species ; macrophytes ; lowland river ; long-term changes ; environmental parameters ; ecological status ; Slovenia ; aquatic plants ; wetlands ; alien invasive species