Compositional breakpoints of freshwater plant communities across continents
| Autor: | Jorge García-Girón, Jani Heino, Lars Baastrup-Spohr, John Clayton, Mary de Winton, Tõnu Feldmann, Camino Fernández-Aláez, Frauke Ecke, Patrick Grillas, Mark V. Hoyer, Agnieszka Kolada, Sarian Kosten, Balázs A. Lukács, Marit Mjelde, Roger P. Mormul, Laila Rhazi, Mouhssine Rhazi, Laura Sass, Jun Xu, Janne Alahuhta |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Limnetica, 42, 291-301 García-Girón, J, Heino, J, Baastrup-Spohr, L, Clayton, J, Winton, M D, 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, vol. 42, no. 2 . https://doi.org/10.23818/limn.42.21 Limnetica, 42, 2, pp. 291-301 |
| ISSN: | 0213-8409 |
| DOI: | 10.23818/limn.42.21 |
| Popis: | Unravelling patterns and mechanisms of biogeographical transitions is crucial if we are to understand compositional gradientsat large spatial extents, but no studies have thus far examined breakpoints in community composition of freshwater plants acrosscontinents. 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 subtropicsto the poles. Our combination of multivariate regression tree (MRT) analysis and k-means partitioning suggests that the mostabrupt breakpoint exists between temperate to boreal regions on the one hand and freshwater plant communities harbouringmainly subtropical or Mediterranean assemblages on the other. The spatially structured variation in current climatic conditionsis 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, ourstudy supports the foundations of global regionalisation for freshwater plants and anticipates further biogeographical researchon freshwater plant communities once datasets have been harmonised for conducting large-scale spatial analyses. |
| Databáze: | OpenAIRE |
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