Supplementary material from "Influence of past climatic change on phylogeography and demographic history of narwhals, Monodon monoceros"
Posted on 2020-04-15 - 05:25
The Arctic is warming at an unprecedented rate, with unknown consequences for endemic fauna. However, Earth has experienced severe climatic oscillations in the past, and understanding how species responded to them might provide insight into their resilience to near-future climatic predictions. Little is known about the responses of Arctic marine mammals to past climatic shifts, but narwhals (Monodon monoceros) are considered one of the endemic Arctic species most vulnerable to environmental change. Here, we analyse 121 complete mitochondrial genomes from narwhals sampled across their range and use them in combination with species distribution models to elucidate the influence of past and ongoing climatic shifts on their population structure and demographic history. We find low levels of genetic diversity and limited geographic structuring of genetic clades. We show that narwhals experienced a long-term low effective population size, which increased after the last glacial maximum, when the amount of suitable habitat expanded. Similar post-glacial habitat release has been a key driver of population size expansion of other Polar marine predators. Our analyses indicate that habitat availability has been critical to the success of narwhals, raising concerns for their fate in an increasingly warming Arctic.
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Louis, Marie; Skovrind, Mikkel; Samaniego Castruita, Jose Alfredo; Garilao, Cristina; Kaschner, Kristin; gopalakrishnan, Shyam; et al. (2020). Supplementary material from "Influence of past climatic change on phylogeography and demographic history of narwhals, Monodon monoceros". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.4938051.v1
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AUTHORS (15)
ML
Marie Louis
MS
Mikkel Skovrind
JS
Jose Alfredo Samaniego Castruita
CG
Cristina Garilao
KK
Kristin Kaschner
Sg
Shyam gopalakrishnan
JH
James S. Haile
CL
Christian Lydersen
KK
Kit M. Kovacs
EG
Eva Garde
MH
Mads Peter Heide-Jørgensen
LP
Lianne Postma
SF
Steven H. Ferguson
EW
Eske Willerslev
EL
Eline D. Lorenzen