Parkway trees, trees within a designated landscape and often owned by the city, can be an asset to any municipality but also have the potential to be a liability if improperly managed. The many benefits of parkway trees include increasing property and retail value, providing natural shade and windbreaks that...
In grasslands, grazing by large ungulates can influence vegetation structure, composition, primary productivity, and ultimately, ecosystem functioning. While grazing represents a complex disturbance, grazing intensity largely determines the effects of
grazing on vegetation. Structural and compositional changes in the plant community caused by grazing could have bottom-up effects on species...
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PatriciaL. Kennedy
In grasslands, grazing by large ungulates can influence vegetation
Energy development is expanding rapidly across the western US. Negative effects have been documented for some wildlife, but consequences of development are unclear for other taxa, including raptors. We had the opportunity to examine effects of oil and natural gas development on two raptor species of conservation concern, ferruginous hawks...
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PatriciaL. Kennedy
Energy development is expanding rapidly across the western US
Purposeful introductions of exotic species for rehabilitation efforts following wildfire are common on rangelands in the western U.S., though potential ecological impacts of introduced species in novel environments are often poorly understood. One such introduced species, Kochia prostrata (L.) Schrad (forage kochia) has been seeded on over 200,000 ha throughout...
The purpose of this study was to examine fifth,
seventh, and tenth graders' attitudes toward school and
classroom science by means of questionnaires and
interviews. In particular, the study hoped to determine
(a) if a relationship existed between these two attitudes,
(b) what relationship, if any, grade level, gender,
ethnicity,...
Background:
The Amazon River runs nearly 6500 km across the South American continent before emptying into the western tropical North Atlantic Ocean. In terms of both volume and watershed area, it is the world’s largest riverine system, affecting elemental cycling on a global scale.
Results:
A quantitative inventory of genes...
Ultrastructural analysis and chemical inhibition studies were
carried out on first cleavage of Mytilus zygotes to determine possible
relationships between the mitotic apparatus and the cortex during
polar lobe formation.
The stages of mitosis correlated with the appearance of the
polar lobe were first determined by light microscopy. The polar...
Surveys of both patients and health care providers have indicated strong interest, up to 95%, in favor of advance directives, which are legal documents that express patients' healthcare treatment decisions. Despite the widespread support for advance directives, actual completion rates are very low, ranging from 4% to 20% for the...