Relationship of stump diameter to diameter at breast height for seven tree species in Arizona and New Mexico. Research Note INT-212. USDA Forest Service Pacific Southwest Range and Experiment Station: Albuquerque, NM. 3 pp.Hann, D. W., 1976: Relationship of stump diameter to diameter at ...
Trees are pivotal to global biodiversity and nature’s contributions to people, yet accelerating global changes threaten global tree diversity, making accurate species extinction risk assessments necessary. To identify species that require expert-based re-evaluation, we assess exposure to change in six a...
Sunbathing slows evolution in island lizards: Study Here we compared the maxilla of two similar species of phrynosomatids: Uta stansburiana (Common Side-blotched Lizard) and Urosaurus omatus (OrnateTree Lizard). Geometric Morphometric Differentiation of Two Western USA Lizards (Phrynosomatidae: Squama...
(elevation, aspect, slope steepness, and terrain curvature). We conducted a ground survey, measured biometrical parameters of trees and hedges, determined species composition and tree physiognomy, soil types and nutrient contents, and sampled wood cores and applied dendrochronology for trees’ GI ...
Many of the tree species, which have been planted in our desert are not well suited for our harsh soil conditions. Therefore, they need annual supplemental Arizona tree fertilization. To provide this, we “Root Feed” or inject nutrients at high pressure in a liquid form throughout the root...
We captured 47 bats of 5 species using artificial roosts. We only captured male bats from roosts in 2009, juveniles and females were also captured in 2010 but no maternity roosts were documented. We recommend that resin roosts placed in clusters on live trees be used to supplement natural ...
over 70 species of animals are endangered in Arizona. Here are seven. Can they be saved? Canva Mexican Gray Wolf One of the rarest wolves in the United States, there were once thousands ofMexican Gray Wolvesroaming the southwest. In the 1970s they were nearly wiped out due to hunting and...
Arizona State Amphibian: Arizona Tree Frog Themountain tree frog, (Hyla eximia,)is a species of frog in the Hylidae family endemic to Mexico. Its natural habitats are temperate forests, subtropical or tropical moist montane forests, subtropical or tropical high-altitude grassland, rivers, intermitten...
Most Amazonian tree species are extremely rare but a few are common across the region. Indeed, just 227 ‘hyperdominant’ species account for >50% of all individuals >10 cm diameter at 1.3 m in height. Yet, the degree to which the phenomenon of hyperdominance is sensitive to tree ...
Laboratory of Tree-Ring Research, The University of Arizona, Tucson, Arizona. The effect of periodical cicadas on growth of five tree species in Midwestern deciduous forests As director of the University of Arizona's Laboratory of Tree-Ring Research, Swetnam has spent his entire career studying th...