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Advisor(s)
Abstract(s)
With climate change impacting trees worldwide, enhancing adaptation capacity has become
an important goal of provenance translocation strategies for forestry, ecological renovation, and
biodiversity conservation. Given that not every species can be studied in detail, it is important
to understand the extent to which climate adaptation patterns can be generalised across species,
in terms of the selective agents and traits involved. We here compare patterns of genetic-based
population (co)variation in leaf economic and hydraulic traits, climate–trait associations, and genomic
differentiation of two widespread tree species (Eucalyptus pauciflora and E. ovata). We studied 2-yearold
trees growing in a common-garden trial established with progeny from populations of both
species, pair-sampled from 22 localities across their overlapping native distribution in Tasmania,
Australia. Despite originating from the same climatic gradients, the species differed in their levels of
population variance and trait covariance, patterns of population variation within each species were
uncorrelated, and the species had different climate–trait associations. Further, the pattern of genomic
differentiation among populations was uncorrelated between species, and population differentiation
in leaf traits was mostly uncorrelated with genomic differentiation. We discuss hypotheses to
explain this decoupling of patterns and propose that the choice of seed provenances for climatebased
plantings needs to account for multiple dimensions of climate change unless species-specific
information is available
Description
Keywords
assisted migration climate adaptation Eucalyptus hydraulic traits leaf traits provenancing strategies seed-sourcing parallel evolution
Pedagogical Context
Citation
Prober, S.M.; Potts, B.M.; Harrison, P.A.;Wiehl, G.; Bailey, T.G.; Costa e Silva, J.; Price, M.R.; Speijers, J.; Steane, D.A.; Vaillancourt, R.E. Leaf Economic and Hydraulic Traits Signal Disparate Climate Adaptation Patterns in Two Co-Occurring Woodland Eucalypts. Plants 2022, 11, 1846
Publisher
MDPI