Publications
Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov
Filter Total Items: 3617
Modeling behavior of prescribed fires in Yosemite National Park
The National Fire Danger Rating System and the Fire Behavior Prediction System were tested on prescribed fires burning underneath canopies in six fuel types in Yosemite National Park, California. The mean error for rate of spread was +0.03 foot per minute for the NFDRS and -0.15 foot for the FBPS. For flame length the mean error was -0.38 foot for both systems. Regressions provided factors for cor
Authors
J. W. van Wagtendonk, S.J. Botti
Consumption of commercially-grown grapes by American robins: a field evaluation of laboratory estimates
No abstract available.
Authors
J. P. Skorupa, R. L. Hothem
Stylites, a vascular land plant without stomata absorbs CO2 via its roots
No abstract available.
Authors
J. E. Keeley, C.B. Osmond, J.A. Raven
Seed predation due to the yucca moth symbiosis
All species of Yucca (Agavaceae) require the pollinator services of a species of moth in the genus Tegeticula (Lepidoptera: Incurvariidae). These moths oviposit in the ovary of the plants and the larvae are entirely dependent upon Yucca seeds for food. The extent and distribution of larval seed predation was examined in nine Yucca species in the southwestern United States. The proportion of seeds
Authors
Jon E. Keeley, Sterling C. Keeley, C. C. Swift, J. Lee
Post-fire recovery of California coastal sage scrub
Postfire regeneration of the shrub and herb vegetation on eight coastal slopes of California coastal sage scrub was studied in the first two growing seasons after fire. All shrub species resprouted with the exception of the suffrutescent Lotus scoparius, though it is not known if this species was alive prior to the fire. It was estimated that 70% of the prefire shrub populations resprouted and the
Authors
Jon E. Keeley, Sterling C. Keeley
Phenotypic variation of the Mexican duck (Anas platyrhynchos diazi) in Mexico
A collection of 98 breeding Mexican Ducks (Anas platyrhynchos diazi) was made in Mexico from six areas between the United States border with Chihuahua and Lake Chapala, Jalisco, in order to study geographic variation. Plumage indices showed a relatively smooth clinal change from north to south; northern populations were most influenced by the Northern Mallard (A. p. platyrhynchos) phenotype. Most
Authors
N. J. Scott, R.P. Reynolds
Golden Gate uses team approach on 'monumental' resource problems
No abstract available.
Authors
J. A. Howell
Comparative ability of northern pintails, gadwalls, and northern shovelers to metabolize foods
No abstract available.
Authors
M. R. Miller
Carbon assimilation characteristics of the aquatic CAM plant Isoetes howellii
No abstract available.
Authors
J. E. Keeley, G. Busch
Proper expression of metabolizable energy in avian energetics
We review metabolizable energy (ME) concepts and present evidence suggesting that the form of ME used for analyses of avian energetics can affect interpretation of results. Apparent ME (AME) is the most widely used measure of food energy available to birds. True ME (TME) differs from AME in recognizing fecal and urinary energy of nonfood origin as metabolized energy. Only AME values obtained from
Authors
M. R. Miller, K. J. Reinecke