caa a22 4500 606218874 CHVBK 20210128101115.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11104-015-2394-8 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2394-8 Chemical composition rather than plant geographic origin drives the breakdown of riparian plant litter with changes in associated invertebrate diversity [Elektronische Daten] [Marion Bottollier-Curtet, Jean-Yves Charcosset, Anne-Marie Planty-Tabacchi, Eric Tabacchi] Background and aims: The study aimed to assess the effects of the potential replacement of dominant native plants by co-occurring exotic invasives on organic matter degradation in a riparian area. The questions were: i) Is there a relationship between the litter breakdown rate and species origin? ii) Is the chemical composition more relevant than species origin? iii) Does species origin influence the associated saprophagous invertebrate community? Methods: Within the riparian zone of the Garonne River (France), we conducted a litterbag experiment using pairs of native and exotic species selected in the stages of the successional gradient. Results: Native and exotic species did not differ in their primary chemical composition and breakdown rate. Litter breakdown rates were primarily driven by the C:N ratio with no influence of species origin. The abundance and diversity of saprophagous invertebrates of exotic and native species did not differ, but the composition did. Only one plant litter was completely degraded much earlier than expected (next litterfall) while remnant litter were still present at this time for the other species. Conclusions: The replacement of a dominant native by an exotic invasive plant species does not generally result in noticeable changes in the litter breakdown rate, which mainly depends on litter composition. Litter from quickly degrading exotic species may cause a resource discontinuity in invaded areas stabilized by river regulation. Springer International Publishing Switzerland, 2015 Invasive plant nationallicence Species replacement nationallicence River bank nationallicence Litter bag experiment nationallicence Leaf litter invertebrates nationallicence Resource discontinuity nationallicence Bottollier-Curtet Marion Association "les Ecologistes de l'Euzière” Domaine de Restinclière, 34730, Prades-le-Lez, France aut Charcosset Jean-Yves CNRS, INP, UPS; EcoLab Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, 31326, Castanet-Tolosan, France aut Planty-Tabacchi Anne-Marie INP, UPS; EcoLab Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, 118 route de Narbonne, 31062, Toulouse, France aut Tabacchi Eric CNRS, INP, UPS; EcoLab Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, 118 route de Narbonne, 31062, Toulouse, France aut Plant and Soil Springer International Publishing 390/1-2(2015-05-01), 265-278 0032-079X 390:1-2<265 2015 390 11104 https://doi.org/10.1007/s11104-015-2394-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2394-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bottollier-Curtet Marion Association "les Ecologistes de l'Euzière” Domaine de Restinclière, 34730, Prades-le-Lez, France aut NATIONALLICENCE 700 1- Charcosset Jean-Yves CNRS, INP, UPS; EcoLab Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, 31326, Castanet-Tolosan, France aut NATIONALLICENCE 700 1- Planty-Tabacchi Anne-Marie INP, UPS; EcoLab Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, 118 route de Narbonne, 31062, Toulouse, France aut NATIONALLICENCE 700 1- Tabacchi Eric CNRS, INP, UPS; EcoLab Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, 118 route de Narbonne, 31062, Toulouse, France aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 390/1-2(2015-05-01), 265-278 0032-079X 390:1-2<265 2015 390 11104