|Title||Full circumpolar migration ensures evolutionary unity in the Emperor penguin|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Authors||Cristofari R., Bertorelle G., Ancel A., Benazzo A., Le Maho Y., Ponganis P.J, Stenseth NC, Trathan P.N, Whittington J.D, Zanetti E., Zitterbart D.P, Le Bohec C., Trucchi E.|
|Type of Article||Article|
|Keywords||bird population; climate-change; diversity; generation sequencing data; genomics; history; maximum-likelihood; population-genetics; r-package; tool set|
Defining reliable demographic models is essential to understand the threats of ongoing environmental change. Yet, in the most remote and threatened areas, models are often based on the survey of a single population, assuming stationarity and independence in population responses. This is the case for the Emperor penguin Aptenodytes forsteri, a flagship Antarctic species that may be at high risk continent-wide before 2100. Here, using genome-wide data from the whole Antarctic continent, we reveal that this top-predator is organized as one single global population with a shared demography since the late Quaternary. We refute the view of the local population as a relevant demographic unit, and highlight that (i) robust extinction risk estimations are only possible by including dispersal rates and (ii) colony-scaled population size is rather indicative of local stochastic events, whereas the species' response to global environmental change is likely to follow a shared evolutionary trajectory.
|Short Title||Nat. Commun.|