Filters: Tags: Interference (X)17 results (216ms)
Identification of field isolates of infectious bronchitis virus by interference with the La Sota strain of Newcastle disease virus.
Intensity of interference varies with resource density: Evidence from a field study with snow buntings, Plectrophenax nivalis
Intensity of interference varies with food density: Support for behaviour-based models of interference
Acute infectious bursal disease in poultry: Protection afforded by maternally derived antibodies and interference with live vaccination
Hemoglobin interference in the direct determination of erythrocyte protoporphyrin concentrations for monitoring lead intoxication of waterfowl.
Competition and Facilitation: Contrasting Effects of Artemisia Tridentata on Desert vs. Montane Pines
Circumstantial evidence suggests that Artemisia tridentata may out?compete Pinus ponderosa and P. jefferyi for water at ecotones between shrub steppe and montane forest vegetation in the Great Basin. Other studies indicate that within the shrub steppe Artemisia may act as a nurse plant for a third species of pine, P. monophylla. We used field experiments to study these contrasting effects of Artemisia on P. ponderosa and P. monophylla within the context of the distributional patterns in western Nevada of all three species on andesite, and on sites where hydrothermal activity has altered the andesite. At intermediate elevations in the Great Basin Artemisia and P. monophylla are restricted to unaltered desert soils,...
Host Susceptibility to Endogenous Viruses: Defective, Glycoprotein-Expressing Proviruses Interfere With Infections.
Nitrogen enhances the competitive ability of cheatgrass (Bromus tectorum) relative to native grasses
Invasion by cheatgrass and the associated high fire frequency can displace native plant communities from a perennial to an annual grass driven system. Our overall objective of this study was to determine the potential to favor desired native perennial bunchgrasses over annual grasses by altering plant available mineral nitrogen (N). In the first study, we grew cheatgrass and three native bunch grasses (native grasses were combined in equal proportions) in an addition series experimental design and applied one of three N treatments (0, 137, and 280 mg N/kg soil). Regression models were used to derive the effects of intra- and interspecific competition on individual plant yield of cheatgrass and the native bunch grasses...
Behavior of focal individuals of two potentially competing sympatric stonefly species, Megarcys signata and Kogotus modestus (Perlodidae), was videotaped in flow-through plexiglass arenas placed in the East River, Gunnison County, Colorado. Focal individuals were observed alone and in pairs with conspecifics and allospecifics at four prey (Baetis bicaudatus, Baetidae, Ephemeroptera) densities to determine whether competitors and prey resource levels affected prey capture rates. Presence of conspecific or allospecific competitors reduced stonefly prey capture rates, especially for Kogotus, the smaller of the two species, due to a significant decline in predator-prey encounter rates with competitors present. This...
Coexistence and interference between a native perennial grass and non-native annual grasses in California
Infectious bronchitis virus vaccine interferes with the replication of avian pneumovirus vaccine in domestic fowl
Interference competition and the functional response of oystercatchers searching for cockles by touch