Adaptive phenotypic plasticity in a clonal invader

Ecology and Evolution
Gerlien VerhaegenMartin Haase

Abstract

Organisms featuring wide trait variability and occurring in a wide range of habitats, such as the ovoviviparous New Zealand freshwater snail Potamopyrgus antipodarum, are ideal models to study adaptation. Since the mid-19th century, P. antipodarum, characterized by extremely variable shell morphology, has successfully invaded aquatic areas on four continents. Because these obligately and wholly asexual invasive populations harbor low genetic diversity compared to mixed sexual/asexual populations in the native range, we hypothesized that (1) this phenotypic variation in the invasive range might be adaptive with respect to colonization of novel habitats, and (2) that at least some of the variation might be caused by phenotypic plasticity. We surveyed 425 snails from 21 localities across northwest Europe to attempt to disentangle genetic and environmental effects on shell morphology. We analyzed brood size as proxy for fitness and shell geometric morphometrics, while controlling for genetic background. Our survey revealed 10 SNP genotypes nested into two mtDNA haplotypes and indicated that mainly lineage drove variation in shell shape but not size. Physicochemical parameters affected both shell shape and size and the interaction o...Continue Reading

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Datasets Mentioned

BETA
SRS2839272
GFLZ00000000
PRJEB24869
MG581815

Methods Mentioned

BETA
genotyping
PCA

Software Mentioned

KASP
PopART
lme4
MorphoJ
CoordGen8
DEJAT
ORFfinder
TwoGroup8
MuMIn
effects

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