Naslov
From micro to macroevolution: drivers of shape variation in an island radiation of Podarcis lizards

Autori
Taverne, Maxime ; Dutel, Hugo ; Fagan, Michael ; Štambuk, Anamaria ; Lisičić, Duje ; Tadić, Zoran ; Fabre, Anne‐Claire ; Herrel, Anthony

Izvornik
Evolution (0014-3820) 75 (2021), 11; 2685-2707

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
bite force, diet, geometric morphometrics, head shape, intraspecific variation, island, lizards, sexual competition

Sažetak
Phenotypic traits have been shown to evolve in response to variation in the environment. However, the evolutionary processes underlying the emergence of phenotypic diversity can typically only be understood at the population level. Consequently, how subtle phenotypic differences at the intraspecific level can give rise to larger-scale changes in performance and ecology remains poorly understood. We here tested for the covariation between ecology, bite force, jaw muscle architecture, and the three- dimensional shape of the cranium and mandible in 16 insular populations of the lizards Podarcis melisellensis and P. sicula. We then compared the patterns observed at the among-population level with those observed at the interspecific level. We found that three-dimensional head shape as well as jaw musculature evolve similarly under similar ecological circumstances. Depending on the type of food consumed or on the level of sexual competition, different muscle groups were more developed and appeared to underlie changes in cranium and mandible shape. Our findings show that the local selective regimes are primary drivers of phenotypic variation resulting in predictable patterns of form and function. Moreover, intraspecific patterns of variation were generally consistent with those at the interspecific level, suggesting that microevolutionary variation may translate into macroevolutionary patterns of ecomorphological diversity.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA