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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: 3776

Proper expression of metabolizable energy in avian energetics 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...
Authors
M. R. Miller, K. J. Reinecke

Trimorphodon tau Trimorphodon tau

No abstract available at this time
Authors
N.J. Scott, R.W. McDiarmid

Trimorphodon biscutatus Trimorphodon biscutatus

No abstract available at this time
Authors
N.J. Scott, R.W. McDiarmid

Trimorphodon Trimorphodon

No abstract available at this time
Authors
N.J. Scott, R.W. McDiarmid

Crassulacean acid metabolism in Isoetes bolanderi in high elevation oligotrophic lakes Crassulacean acid metabolism in Isoetes bolanderi in high elevation oligotrophic lakes

Isoetes bolanderi dominates the littoral flora of Siesta (elevation 2,440 m) and Ellery (2,905 m) lakes in the Sierra Nevada Range of California, USA. Both lakes are sparsely vegetated and I. bolanderi maintained aboveground oven dry weight of 30–50 m−22 through most of the 1981 summer growing season. Plants at the higher elevation Ellery Lake were half as large as plants at Siesta Lake...
Authors
Jon E. Keeley, C.M. Walker, R.P. Mathews

Crassulacean acid metabolism in the seasonally submerged aquatic Isoetes howellii Crassulacean acid metabolism in the seasonally submerged aquatic Isoetes howellii

Evidence to date is consistent with the hypothesis that the submerged aquatic Isoetes howellii Engelmann possesses crassulacean acid metabolism. Quantitative 14C uptake studies indicate that CO2 assimilation in both the light and dark are functions of pH and total inorganic carbon level. In both the light and dark, maximum uptake rates in 0.6 mM NaHCO3 were double the rates in 0.3 mM...
Authors
Jon E. Keeley
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