In western North America, juncos nest on or near the ground in montane regions from valley bottoms to at least upper tree line (>3000 m elevation), often near water and in more mesic habitats, such as Aspen (Populus tremuloides
) stands and spruce (Picea spp.) woodlands (Phelps 1968; Thatcher 1968; Nolan and others 2002).
in topographically protected areas and along the canyon bottom, major tree species, along with Arizona walnut, include box elder (Acer negundo), narrow-leaf cottonwood (Populus angustifolia), willows (Salix lasiolepis and Salix laevigata), Gambel oak (Quercus gambelii), quaking aspen (Populus tremuloides
), Douglas-fir (Pseudotsuga menziessii), and ponderosa pine (Joyce, 1976).
In this study, we have used the geometry of the Populus tremuloides
leaf, which is a common North American species (Colorado Rocky Mountains, USA)  to design a new antenna and investigate the effect of the leaf contour and nervure network on the performances of the structure.
However, this phenomenon and fine genetic structure of mixed clonal and seed-derived populations are better studied in related North American species, trembling aspen, Populus tremuloides
Lecanora sambuci (Pers.) Nyl.--Corticolous (Populus tremuloides
We present the first account of the boreal tree species trembling aspen (Populus tremuloides
, Salicaceae) growing beyond the latitudinal treeline in the northern foothills of the Brooks Range, Alaska.
mariana) pellets showed that the heights of the main peaks decreased with boron retention in the wood pellets as described to predict MC of Douglas-fir (Pseudotsuga menziesii menziesii) veneers and trembling aspen (Populus tremuloides
Michx.) strand products by Mounanga et al.
The Canadian propolis is of dual plant origin and combines the defensive metabolites of two different tree species, quaking aspen Populus tremuloides
and balsam poplar P.
Quaking aspen (Populus tremuloides
) is the most widely distributed tree in North America, and its cousins reach around the world.
Growth responses of Populus tremuloides
clones to interacting elevated carbon dioxide and tropospheric ozone.
One of the suitable tree species for the climatic conditions of the Baltic region is hybrid aspen (Populus tremuloides
Vegetation was generally mixed boreal forest with canopy dominated by spruce Picea spp., Alaska paper birch Betula neoalaskana, balsam poplar Populus balsamifera, quaking aspen Populus tremuloides
, and eastern larch Larix laricina grading into shrub communities at higher elevations and included active floodplains of large rivers.