title: Ecotoxicity effects triggered in aquatic organisms by invasive Acer negundo and native Alnus glutinosa leaf leachates obtained in the process of aerobic decomposition.
abstract: The replacement of autochthonous tree species by invasive ones in coastal zones of freshwater bodies induces additional alteration of hydrochemical and microbiological characteristics due to decomposition of fallen leaves of non-indigenous species, which can lead to ecotoxic response of the littoral biota. Leaves of invasive to Lithuania boxelder maple (Acer negundo) and autochthonous black alder (Alnus glutinosa) lost more than half of biomass and released stable amount of DOC (60-70 mg/L) throughout 90-day mesocosm experiment under aerobic conditions. This, along with the relatively small BOD7 values detected after some variation within the first month confirms effective biodegradation by fungi and bacteria. The ambient water was more enriched with different forms of N and P by decomposing boxelder maple than by alder leaves. During the first month, both leachates were more toxic to charophyte (Nitellopsis obtusa) at mortality and membrane depolarization levels, while later to two crustacean species. Biomarker response, H(+)-ATPase activity in membrane preparations from N. obtusa, was stronger for A. negundo. Generally, boxelder maple leaf leachates were more toxic to tested hydrobionts and this coincides with previous study on leaves of the same pair of tree species conducted under microaerobic conditions (Krevš et al., 2013).
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania. Electronic address: levonas.manusadzianas@botanika.lt.
authors: Levonas
authors: L
authors: Manusadžianas
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Jūratė
authors: J
authors: Darginavičienė
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Brigita
authors: B
authors: Gylytė
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Sigita
authors: S
authors: Jurkonienė
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Alina
authors: A
authors: Krevš
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Alė
authors: A
authors: Kučinskienė
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Rimutė
authors: R
authors: Mačkinaitė
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Romas
authors: R
authors: Pakalnis
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Kazys
authors: K
authors: Sadauskas
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Jūratė
authors: J
authors: Sendžikaitė
authors: Institute of Botany, Nature Research Centre, Žaliųjų Ežerų str. 49, LT-08406 Vilnius, Lithuania.
authors: Rimantas
authors: R
authors: Vitkus
mesh_terms: D031002:Acer / Q000737:chemistry*; D000332:Aerobiosis; D029661:Alnus / Q000737:chemistry*; D059001:Aquatic Organisms / Q000187:drug effects*; D001673:Biodegradation, Environmental; D058865:Introduced Species; D008097:Lithuania; D010936:Plant Extracts / Q000633:toxicity; D018515:Plant Leaves / Q000737:chemistry / Q000633:toxicity*; D018675:Toxicity Tests; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D010936:Plant Extracts; D014874:Water Pollutants, Chemical
keywords: Acer negundo; Alnus glutinosa; Biodegradation; H(+)-ATPase biomarker; Leaf leachate toxicity; Nitellopsis obtusa