title: Ecotoxicological effects evoked in hydrophytes by leachates of invasive Acer negundo and autochthonous Alnus glutinosa fallen off leaves during their microbial decomposition.
abstract: Throughout 90-day biodegradation under microaerobic conditions, invasive to Lithuania species boxelder maple (Acer negundo) leaves lost 1.5-fold more biomass than that of autochthonous black alder (Alnus glutinosa), releasing higher contents of N(tot), ammonium and generating higher BOD(7). Boxelder maple leaf leachates were characterized by higher total bacterial numbers and colony numbers of heterotrophic and cellulose-decomposing bacteria than those of black alder. The higher toxicity of A. negundo aqueous extracts and leachates to charophyte cell (Nitellopsis obtusa), the inhabitant of clean lakes, were manifested at mortality and membrane depolarization levels, while the effect on H(+)-ATPase activity in membrane preparations from the same algae was stronger in case of A. glutinosa. Duckweed (Lemna minor), a bioindicator of eutrophic waters, was more sensitive to leaf leachates of A. glutinosa. Fallen leaves and leaf litter leachates from invasive and native species of trees, which enter water body, affect differently microbial biodestruction and aquatic vegetation in freshwater systems.
authors.affiliation: Institute of Botany of the Nature Research Centre, Žaliųjų Ežerų Str 49, LT-08406 Vilnius, Lithuania.
authors.forename: Alina
authors.initials: A
authors.lastname: Krevš
authors.forename: Jūratė
authors.initials: J
authors.lastname: Darginavičienė
authors.forename: Brigita
authors.initials: B
authors.lastname: Gylytė
authors.forename: Reda
authors.initials: R
authors.lastname: Grigutytė
authors.forename: Sigita
authors.initials: S
authors.lastname: Jurkonienė
authors.forename: Rolandas
authors.initials: R
authors.lastname: Karitonas
authors.forename: Alė
authors.initials: A
authors.lastname: Kučinskienė
authors.forename: Romas
authors.initials: R
authors.lastname: Pakalnis
authors.forename: Kazys
authors.initials: K
authors.lastname: Sadauskas
authors.forename: Rimantas
authors.initials: R
authors.lastname: Vitkus
authors.forename: Levonas
authors.initials: L
authors.lastname: Manusadžianas
mesh_terms: D031002:Acer / Q000502:physiology*; D029661:Alnus / Q000502:physiology*; D001419:Bacteria / Q000187:drug effects / Q000254:growth & development; D001673:Biodegradation, Environmental; D018533:Biomass; D054750:Ecotoxicology; D005618:Fresh Water / Q000737:chemistry; D058865:Introduced Species; D008097:Lithuania; D010936:Plant Extracts / Q000633:toxicity*; D018515:Plant Leaves / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D010936:Plant Extracts; D014874:Water Pollutants, Chemical