ponderosa pine


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ponderosa pine

pinusponderosa.
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Over the past 150 years, ponderosa pine forests of the American Southwest have shifted from relatively open, park-like stands with clumps of large-diameter trees (Cooper, 1960; White, 1985) to dense stands of small-diameter trees with very few open areas (covington and Moore, 1994).
Douglas-fir (Pseudotsuga menziesii), ponderosa pine (Pinus ponderosa), and northern red oak (Quercus rubra) lumber was cut into clear samples measuring 25 by 75 by 127 mm long.
Key words: Colaptes auratus, Hairy Woodpecker, nest-site characteristics, Northern Flicker, Picoides albolarvatus, Picodes villosus, Pinus ponderosa, Ponderosa Pine, snags, White-headed Woodpecker
And, thanks to Grand Canyon Chapter activists in Arizona, Kaibab National Forest managers have withdrawn a proposed timber sale that would have logged nearly 1,600 truckloads of trees from one of the most extensive tracts of old-growth ponderosa pine remaining in the Southwest--all within three miles of Grand Canyon National Park.
Eventually we followed the dogs to the top of a mountain, where we found the big cat sitting in a large ponderosa pine.
The fire was deliberately started by the National Park Service a week ago to clear brush, but quickly flared out of control, racing through stands of ponderosa pine.
We used green ponderosa pine cones, gathered in late July 1996, in experiments to test the effect of spines on closed cones.
He recently sponsored a team that, in eight weeks, built boundary fences to protect riparian habitat and planted 7,500 ponderosa pine seedlings--work that never would have been accomplished with his regular two-man crew.
Some ecosystems, like the ponderosa pine forests in the West, rely on fire to thrive.
The three species of pines used occur sympatrically and produce similarly-shaped, winged seeds that differ in size: lodgepole pine (Pinus contorta; 9 [+ or -] 2 mg, filled seed including wing), ponderosa pine (Pinus ponderosa; 62 [+ or -] 11 mg), and Jeffrey pine (Pinus jeffreyi; 185 [+ or -] 23 mg).