Kergoat G. J., Condamine F. L., Toussaint E. F. A., Capdevielle Dulac Claire, Clamens A. L., Barbut J., Goldstein P. Z., Le Rü Bruno. (2018). Opposite macroevolutionary responses to environmental changes in grasses and insects during the Neogene grassland expansion. Nature Communications, 9, p. art. 5089 [9 p.]. ISSN 2041-1723.
Titre du document
Opposite macroevolutionary responses to environmental changes in grasses and insects during the Neogene grassland expansion
The rise of Neogene C-4 grasslands is one of the most drastic changes recently experienced by the biosphere. A central - and widely debated - hypothesis posits that Neogene grasslands acted as a major adaptive zone for herbivore lineages. We test this hypothesis with a novel model system, the Sesamiina stemborer moths and their associated host-grasses. Using a comparative phylogenetic framework integrating paleoenvironmental proxies we recover a negative correlation between the evolutionary trajectories of insects and plants. Our results show that paleoenvironmental changes generated opposing macroevolutionary dynamics in this insect-plant system and call into question the role of grasslands as a universal adaptive cradle. This study illustrates the importance of implementing environmental proxies in diversification analyses to disentangle the relative impacts of biotic and abiotic drivers of macroevolutionary dynamics.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
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Sciences du milieu [021]
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Sciences du monde végétal [076]
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Etudes, transformation, conservation du milieu naturel [082]
