TY - JOUR
T1 - Comparative genetic responses to climate in the varieties of Pinus ponderosa and Pseudotsuga menziesii
T2 - Clines in growth potential
AU - Rehfeldt, Gerald E.
AU - Leites, Laura P.
AU - Bradley St Clair, J.
AU - Jaquish, Barry C.
AU - Sáenz-Romero, Cuauhtémoc
AU - López-Upton, Javier
AU - Joyce, Dennis G.
PY - 2014/7/15
Y1 - 2014/7/15
N2 - Height growth data were assembled from 10 Pinus ponderosa and 17 Pseudotsuga menziesii provenance tests. Data from the disparate studies were scaled according to climate similarities of the provenances to provide single datasets for 781 P. ponderosa and 1193 P. menziesii populations. Mixed effects models were used for two sub-specific varieties of each species to describe clines in growth potential associated with provenance climate while accounting for study effects not eliminated by scaling. Variables related to winter temperatures controlled genetic variation within the varieties of both species. Clines were converted to climatypes by classifying genetic variation, using variation within provenances in relation to the slope of the cline to determine climatype breadth. Climatypes were broader in varieties of P. ponderosa than in P. menziesii and were broader for varieties inhabiting coastal regions of both species than for varieties from interior regions. Projected impacts of climate change on adaptedness used output from an ensemble of 17 general circulation models. Impacts were dependent on cline steepness and climatype breadth but implied that maintaining adaptedness of populations to future climates will require a redistribution of genotypes across forested landscapes.
AB - Height growth data were assembled from 10 Pinus ponderosa and 17 Pseudotsuga menziesii provenance tests. Data from the disparate studies were scaled according to climate similarities of the provenances to provide single datasets for 781 P. ponderosa and 1193 P. menziesii populations. Mixed effects models were used for two sub-specific varieties of each species to describe clines in growth potential associated with provenance climate while accounting for study effects not eliminated by scaling. Variables related to winter temperatures controlled genetic variation within the varieties of both species. Clines were converted to climatypes by classifying genetic variation, using variation within provenances in relation to the slope of the cline to determine climatype breadth. Climatypes were broader in varieties of P. ponderosa than in P. menziesii and were broader for varieties inhabiting coastal regions of both species than for varieties from interior regions. Projected impacts of climate change on adaptedness used output from an ensemble of 17 general circulation models. Impacts were dependent on cline steepness and climatype breadth but implied that maintaining adaptedness of populations to future climates will require a redistribution of genotypes across forested landscapes.
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U2 - 10.1016/j.foreco.2014.02.041
DO - 10.1016/j.foreco.2014.02.041
M3 - Article
AN - SCOPUS:84902132919
SN - 0378-1127
VL - 324
SP - 138
EP - 146
JO - Forest Ecology and Management
JF - Forest Ecology and Management
ER -