Determinants of genetic variation across eco-evolutionary scales in pinnipeds.

Nature Ecology & Evolution
Claire R PeartJochen B.W. Wolf

Abstract

The effective size of a population (Ne), which determines its level of neutral variability, is a key evolutionary parameter. Ne can substantially depart from census sizes of present-day breeding populations (NC) as a result of past demographic changes, variation in life-history traits and selection at linked sites. Using genome-wide data we estimated the long-term coalescent Ne for 17 pinniped species represented by 36 population samples (total n = 458 individuals). Ne estimates ranged from 8,936 to 91,178, were highly consistent within (sub)species and showed a strong positive correlation with NC ([Formula: see text] = 0.59; P = 0.0002). Ne/NC ratios were low (mean, 0.31; median, 0.13) and co-varied strongly with demographic history and, to a lesser degree, with species' ecological and life-history variables such as breeding habitat. Residual variation in Ne/NC, after controlling for past demographic fluctuations, contained information about recent population size changes during the Anthropocene. Specifically, species of conservation concern typically had positive residuals indicative of a smaller contemporary NC than would be expected from their long-term Ne. This study highlights the value of comparative population genomic a...Continue Reading

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Citations

Jul 9, 2020·Nature Communications·Matthias H WeissensteinerJochen B W Wolf
Aug 28, 2020·Molecular Biology and Evolution·Pengcheng WangZhengwang Zhang
Jan 22, 2021·Current Biology : CB·Thibault LeroyBenoit Nabholz
May 13, 2021·Molecular Ecology Resources·Thibaut Paul Patrick SellingerAurélien Tellier
Jul 20, 2021·International Journal for Parasitology. Parasites and Wildlife·Tommi NymanMervi Kunnasranta
Jul 1, 2021·Molecular Ecology·J Andrew DeWoodyJanna R Willoughby
Nov 13, 2021·American Journal of Botany·Holger Schielzeth, Jochen B W Wolf

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Software Mentioned

NGScovar
Samtools
ClustRAD
MSMCtools
HMMcleaner
STAMPY
bppml
mapnh
PSMC
ddRAD

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