Dendrology, Climatology, Ecosystem dynamics, Environmental sciences, Ecosystems, Trophic levels, Deciduous trees, Zoology, Biogeography, Timberlines, Biology, Ecotones, Heterotrophs, Botany, Environmental studies, Trees, Hardwood trees, Ungulates, Forest mensuration, Plant ecology, Forest ecology, Biomes, Ecology, Climate models, Mammals, Atmospheric science...