RT info:eu-repo/semantics/article T1 Compositional breakpoints of freshwater plant communities across continents T2 Puntos de inflexión en los gradientes de composición de las comunidades de plantas acuáticas de diferentes continentes A1 García Girón, Jorge A1 Heino, Jani A1 Baastrup-Spohr, Lars AD 1982- A1 Clayton, John S. A1 De Winton, M. D. A1 Feldmann, Tõnu AD 1973- A1 Fernández Aláez, María del Camino A1 Ecke, Frauke AD 1968- A1 Grillas, Patrick A1 Hoyer, Mark V A1 Kolada, Agnieszka A1 Kosten, Sarian A1 Lukács, Balázs A. A1 Mjelde, Marit 1958- A1 Mormul, Roger Paulo A1 Rhazi, Laila A1 Rhazi, Mouhssine AD 1966- A1 Sass, Laura L. A1 Xu, Jun A1 Alahuhta, Janne A2 Ecologia K1 Ecología. Medio ambiente K1 Aquatic macrophytes K1 Biogeography K1 Latitudinal patterns K1 Regionalisation K1 Biogeografía K1 Macrófitos acuáticos K1 Patrones latitudinales K1 Regionalización K1 2508.08 Limnología K1 2505.01-1 Biogeografía Botánica AB [EN] Unravelling patterns and mechanisms of biogeographical transitions is crucial if we are to understand compositional gradients at large spatial extents, but no studies have thus far examined breakpoints in community composition of freshwater plants across continents. Using a dataset of almost 500 observations of lake plant community composition from six continents, we examined, for the first time, if such breakpoints in geographical space exist for freshwater plants and how well a suite of ecological factors (including climatic and local environmental variables) can explain transitions in community composition from the subtropics to the poles. Our combination of multivariate regression tree (MRT) analysis and k-means partitioning suggests that the most abrupt breakpoint exists between temperate to boreal regions on the one hand and freshwater plant communities harbouring mainly subtropical or Mediterranean assemblages on the other. The spatially structured variation in current climatic conditions is the most likely candidate for controlling these latitudinal patterns, although one cannot rule out joint effects of eco-evolutionary constraints in the harsher high-latitude environments and post-glacial migration lags after Pleistocene Ice Ages. Overall, our study supports the foundations of global regionalisation for freshwater plants and anticipates further biogeographical research on freshwater plant communities once datasets have been harmonised for conducting large-scale spatial analyses PB Asociación Ibérica de Limnología SN 0213-8409 LK https://hdl.handle.net/10612/20554 UL https://hdl.handle.net/10612/20554 NO García-Girón, J., Heino, J., Baastrup-Spohr, L., Clayton, J., de Winton, M., Feldmann, T., Fernández-Aláez, C., Ecke, F., Grillas, P., Hoyer, M. V., Kolada, A., Kosten, S., Lukács, B. A., Mjelde, M., Mormul, R. P., Rhazi, L., Rhazi, M., Sass, L., Xu, J. & Alahuhta, J. (2023). Compositional breakpoints of freshwater plant communities across continents. Limnetica, 42(2), 291-301. https://doi.org/10.23818/LIMN.42.21 NO Sección: SIBECOL-AIL Meeting in Aveiro-2022 DS BULERIA. Repositorio Institucional de la Universidad de León RD 26-jun-2024