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Silvical characteristics of red spruce (Picea rubens)
(USDA Forest Service. Northeastern Forest Experiment Station, 2018)
Oldest known engelmann spruce
(USDA Forest Service. Rocky Mountain Forest and Range Experiment Station, 2018)
Taxonomia e distribuição de Cheilolejeunea aneogyna (Spruce) A. Evans (Lejeuneaceae, Marchantiophyta)
(Brasil, 2012)
Cheilolejeunea aneogyna (Spruce) A. Evans é uma espécie sul americana, ocorrendo nas Florestas Amazônica e Atlântica. Caracteriza-se, principalmente, pela presença do segundo e primeiro dentes do lóbulo contíguos um ao ...
Non-linear feedback processes and a latitudinal gradient in the climatic effects determine green spruce aphid outbreaks in the UK
(2008)
The role of climatic fluctuations in determining the dynamics of insect populations has been a classical problem in population ecology. Here, we use long-term annual data on green spruce aphid populations at nine localities ...
Increment Coring Induced Traumatic Resin Ducts in White Spruce But Not in Lodgepole Pine
(Tree-Ring Society, 2020-01)
Injury from sampling increment cores may induce defense responses in trees, which may vary between species and reflect differing defense allocation strategies against attack by insects and pathogens. We recorded presence ...
Genomic selection in Canadian spruces
(Springer, 2020-01-01)
The genetic gain of spruce (Picea spp.) breeding programs is impeded by long recurrent selection cycles stemming from biological constraints such as late expression of traits, weak juvenile mature correlations, and late ...