scholarly journals Assisted migration across fixed seed zones detects adaptation lags in two major North American tree species

2020 ◽  
Vol 30 (5) ◽  
Author(s):  
Julie R. Etterson ◽  
Meredith W. Cornett ◽  
Mark A. White ◽  
Laura C. Kavajecz
Keyword(s):  
North American ◽  
Tree Species ◽  
Assisted Migration ◽  
Seed Zones

One, two and three-dimensional geometric constraints and climatic correlates of North American tree species richness

Ecography ◽  
2010 ◽  
Vol 34 (2) ◽  
pp. 267-275 ◽  
Author(s):  
Helen T. Murphy ◽  
Jeremy VanDerWal ◽  
Jon Lovett-Doust
Keyword(s):  
Species Richness ◽  
North American ◽  
Tree Species ◽  
Three Dimensional ◽  
Geometric Constraints ◽  
Tree Species Richness

Geographic patterns of genetic diversity in North American trees: a continent-wide analysis

2021 ◽  
Author(s):  
Andrew V. Gougherty
Keyword(s):  
Genetic Diversity ◽  
Population Genetics ◽  
North America ◽  
North American ◽  
Tree Species ◽  
Geographic Patterns ◽  
Study Characteristics ◽  
Dispersal Traits ◽  
The Last Glacial Maximum ◽  
The Last Glacial

In the northern hemisphere, many species have been reported to have greater genetic diversity in southern populations than northern populations - ostensibly due to migration northward following the last glacial maximum (LGM). The generality of this pattern, while well-established for some taxa, remains unclear for North American trees. To address this issue, I collected published population genetics data for 73 North American tree species, and tested whether genetic diversity was associated with latitude or longitude and whether geographic trends were associated with dispersal traits, range or study characteristics. I found there were no general geographic patterns in genetic diversity, and the strength of the geographic gradients were not associated with any species or study characteristics. Species in the northern and western regions of North America tended to have more species with genetic diversity that declined with latitude, but most species had no significant trend. This work shows that North American trees have complex, individualistic, patterns of genetic diversity that may negate explanation by any particular dispersal trait or range characteristic.

Leaf phenology in 22 North American tree species during the 21st century

2009 ◽  
Vol 15 (4) ◽  
pp. 961-975 ◽  
Author(s):  
XAVIER MORIN ◽  
MARTIN J. LECHOWICZ ◽  
CAROL AUGSPURGER ◽  
JOHN O'KEEFE ◽  
DAVID VINER ◽  
...  
Keyword(s):  
21St Century ◽  
North American ◽  
Tree Species ◽  
Leaf Phenology

scholarly journals Voľba lesného reprodukčného materiálu v podmienkach klimatickej zmeny / Choice of forest reproductive material under conditions of climate change

2015 ◽  
Vol 61 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Dušan Gömöry ◽  
Roman Longauer ◽  
Diana Krajmerová
Keyword(s):  
Climate Change ◽  
Tree Species ◽  
Climatic Factors ◽  
Climate Scenario ◽  
Population Variation ◽  
Stress Factors ◽  
Information Uncertainty ◽  
Assisted Migration ◽  
Forest Reproductive Material ◽  
Reproductive Material

AbstractClimate change may endanger not only yield and fulfilling the social functions of European forests, but even the survival of several tree species. The study emphasises the complexity of climatic factors and physiological mechanisms, which may potentially endanger the persistence of tree populations and which cannot be reduced to problems of drought and temperature increase. A substantial inter-population variation in traits associated with the response to climatic stress, observed in provenance experiments, is a prerequisite for the choice of proper forest reproductive material (FRM) in reforestation as a strategy of climate-change mitigation. Assisted migration, i.e., transfer of FRM from source regions, currently characterised by such climate characteristics, which are expected in the target regions in the future, requires knowledge of key stress factors (depending on the climate scenario), physiological processes associated with the adaptation to this stress, identification of genes and eventually epigenetic mechanisms, controlling adaptation processes, and finally mapping of genetic and/or epigenetic variation in key genes. For most tree species, such information is not yet available. Therefore, assisted migration under such information uncertainty needs to be complemented by in situ gene conservation measures to preserve the possibility of reversing the effects of eventual erroneous decisions on FRM transfer.

Snag degradation pathways of four North American boreal tree species

2010 ◽  
Vol 259 (3) ◽  
pp. 246-256 ◽  
Author(s):  
Virginie Arielle Angers ◽  
Pierre Drapeau ◽  
Yves Bergeron
Keyword(s):  
North American ◽  
Tree Species ◽  
Degradation Pathways

scholarly journals Relationships between radial growth rates and lifespan within North American tree species

Ecoscience ◽  
2008 ◽  
Vol 15 (3) ◽  
pp. 349-357 ◽  
Author(s):  
Bryan A. Black ◽  
Jim J. Colbert ◽  
Neil Pederson
Keyword(s):  
North American ◽  
Growth Rates ◽  
Tree Species ◽  
Radial Growth

scholarly journals Comprehensive database of diameter-based biomass regressions for North American tree species

2004 ◽  
Author(s):  
Jennifer C. Jenkins ◽  
David C. Chojnacky ◽  
Linda S. Heath ◽  
Richard A. Birdsey
Keyword(s):  
North American ◽  
Tree Species ◽  
Comprehensive Database

scholarly journals Glacial refugia and modern genetic diversity of 22 western North American tree species

2015 ◽  
Vol 282 (1804) ◽  
pp. 20142903 ◽  
Author(s):  
David R. Roberts ◽  
Andreas Hamann
Keyword(s):  
Genetic Diversity ◽  
North American ◽  
Tree Species ◽  
Allelic Richness ◽  
Meta Analysis ◽  
Strong Relationship ◽  
Glacial Refugia ◽  
Temperate Climate ◽  
Distribution Models ◽  
Wide Range

North American tree species, subspecies and genetic varieties have primarily evolved in a landscape of extensive continental ice and restricted temperate climate environments. Here, we reconstruct the refugial history of western North American trees since the last glacial maximum using species distribution models, validated against 3571 palaeoecological records. We investigate how modern subspecies structure and genetic diversity corresponds to modelled glacial refugia, based on a meta-analysis of allelic richness and expected heterozygosity for 473 populations of 22 tree species. We find that species with strong genetic differentiation into subspecies had widespread and large glacial refugia, whereas species with restricted refugia show no differentiation among populations and little genetic diversity, despite being common over a wide range of environments today. In addition, a strong relationship between allelic richness and the size of modelled glacial refugia ( r 2 = 0.55) suggest that population bottlenecks during glacial periods had a pronounced effect on the presence of rare alleles.

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