Sanin M. J., Kissling W. D., Bacon C. D., Borchsenius F., Galeano G., Svenning J. C., Olivera J., Ramirez R., Trenel P., Pintaud Jean-Christophe. (2016). The Neogene rise of the tropical Andes facilitated diversification of wax palms (Ceroxylon : Arecaceae) through geographical colonization and climatic niche separation. In :
Balslev H. (ed.), Bernal R. (ed.), Fay M.F. (ed.). Palms : emblems of tropical forests. Botanical Journal of the Linnean Society, 182 (2 (no spécial)), p. 303-317. ISSN 0024-4074.
Titre du document
The Neogene rise of the tropical Andes facilitated diversification of wax palms (Ceroxylon : Arecaceae) through geographical colonization and climatic niche separation
Année de publication
2016
Auteurs
Sanin M. J., Kissling W. D., Bacon C. D., Borchsenius F., Galeano G., Svenning J. C., Olivera J., Ramirez R., Trenel P., Pintaud Jean-Christophe
In
Balslev H. (ed.), Bernal R. (ed.), Fay M.F. (ed.), Palms : emblems of tropical forests
Source
Botanical Journal of the Linnean Society, 2016,
182 (2 (no spécial)), p. 303-317 ISSN 0024-4074
The tropical Andes are a biodiversity hotspot, partly due to their rich and complex floristic composition. A fundamental question regarding this outstanding biodiversity is what role the Andean orogeny has played in species diversification. Ceroxylon is a genus of endemic Andean palms that stands out in the palm family (Arecaceae) due to its adaptation to cold, mountainous environments. Here, we reconstruct the biogeography and climatic preference of this lineage to test the hypothesis that Andean uplift allowed diversification by providing suitable habitats along climatic and elevational gradients. Ancestral areas were reconstructed under a model allowing for founder-event speciation and climatic niches were inferred from climatic variables at present-day occurrences of all species. Niche evolution in a phylogenetic framework was evaluated by testing differences between the climatic niches of clades. Our analyses identified four main clades, with a general pattern of diversification through geographical colonization from south to north after the Pliocene uplift of the northern Andes. Adaptation to low temperatures was conserved at the generic level, with climatic niche differentiation among clades along elevational temperature gradients. We conclude that the Neogene Andean uplift has facilitated the diversification of this iconic plant group via opportunities for geographical migration and separation within its climatic niche.
Plan de classement
Sciences du monde végétal [076]
;
Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
VENEZUELA ; COLOMBIE ; EQUATEUR ; PEROU ; BOLIVIE ; ANDES ; ZONE TROPICALE
Localisation
Fonds IRD [F B010068249]
Identifiant IRD
fdi:010068249
