@article{fdi:010057266, title = {{P}hylogenetic turnover in tropical tree communities : impact of environmental filtering, biogeography and mesoclimatic niche conservatism}, author = {{H}ardy, {O}. {J}. and {C}outeron, {P}ierre and {M}unoz, {F}. and {R}amesh, {B}. {R}. and {P}{\'e}lissier, {R}apha{\¨e}l}, editor = {}, language = {{ENG}}, abstract = {{A}im {W}e addressed the roles of environmental filtering, historical biogeography and evolutionary niche conservatism on the phylogenetic structure of tropical tree communities with the following questions. (1) {W}hat is the impact of mesoclimatic gradients and dispersal limitation on phylogenetic turnover and species turnover? (2) {H}ow does phylogenetic turnover between continents compare in intensity with the turnover driven by climatic gradients at a regional scale? (3) {A}re independent phylogenetic reconstructions of the mesoclimatic niche of clades congruent between continents? {L}ocation {P}anama {C}anal {W}atershed and {W}estern {G}hats ({I}ndia), two anciently divergent biogeographic contexts but with comparable rainfall gradients. {M}ethods {U}sing floristic data for 50 1-ha plots in each region, independent measures of phylogenetic turnover (?{ST}) and species turnover ({J}accard) between plots were regressed on geographic and ecological distances. {M}esoclimatic niches were reconstructed for each node of the phylogeny and compared between the two continents. {R}esults (1) {T}he phylogenetic turnover within each region is best explained by mesoclimatic differences (environmental filtering), while species turnover depends both on mesoclimatic differences and geographic distances (dispersal limitation). (2) {T}he phylogenetic turnover between continents (?{ST} = 0.009) is comparable to that caused by mesoclimatic gradients within regions (?{ST} = 0.010) and both effects seem cumulative. (3) {I}ndependent phylogenetic reconstructions of the mesoclimatic niches were strongly correlated between the two continents (r = 0.61), despite the absence of shared species. {M}ain conclusions {O}ur results demonstrate a world-wide deep phylogenetic signal for mesoclimatic niche within a biome, indicating that positive phylogenetic turnover at a regional scale reflects environmental filtering in plant communities.}, keywords = {{A}ssembly processes ; community phylogenetics ; environmental filtering ; neutral communities ; phylodiversity ; phylogenetic signal ; phylogenetic turnover ; species turnover ; tropical rain forest}, booktitle = {}, journal = {{G}lobal {E}cology and {B}iogeography}, volume = {21}, numero = {10}, pages = {1007--1016}, ISSN = {1466-822{X}}, year = {2012}, DOI = {10.1111/j.1466-8238.2011.00742.x}, URL = {https://www.documentation.ird.fr/hor/fdi:010057266}, }