Filters: Tags: variation (X)20 results (44ms)
Reciprocal common garden studies of the germination of seeds of big sagebrush (Artemisia tridentata ).
Variation in oviposition preference of Heliothis virescens in relation to macroevolutionary patterns of heliothine host range.
Characterization of the attenuating M and NP gene segments of the avian influenza A/Mallard/78 virus during in vitro production of avian-human reassortant vaccine viruses and after replication in humans and primates.
Analysis of the evolution and variation of the human influenza A virus nucleoprotein gene from 1933 to 1990.
The transboundary setting of California's water and hydropower systems: linkages between the Sierra Nevada, Columbia, and Colorado hydroclimates.
Climate fluctuations are an environmental stress that must be factored into our designs for water resources, power, and other societal and environmental concerns. Under California's Mediterranean setting, winter and summer climate fluctuations both have important consequences. Winter climatic conditions determine the rates of water delivery to the state, and summer conditions determine most dem...
Temporal variation in actual evapotranspiration of terrestrial ecosystems: Patterns and ecological implications
We compared the water balance among the earth's major terrestrial ecosystems. Potential evapotranspiration, actual evapotranspiration (AET) and deficit were derived for each month and year from 19-25-yr climate records at ninety-four sites around the world representing eleven biomes. For each variable, we determined mean annual values. Our focus, however, was to examine temporal variation in AET, which previously has been correlated with large-scale patterns of ecosystem structure and function. Standard deviation of annual AET, an absolute measure of interannual variability, was highest for grasslands and lowest for tundra and taiga. Coefficient of variation of annual AET, a relative measure of variability, was...
Spatial and temporal variability of higher microarthropod taxa along a transect in a northern Chihuahuan Desert watershed.
Process controls and similarity in the US continental-scale hydrological cycle from EOF analysis of regional climate model simulations
Variation in susceptibility to avian sarcoma viruses and expression of endogenous avian leukosis virus antigens in specific pathogen-free chicken lines.