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Deviations from standard atomic volumes as a quality measure for protein crystal structures.
Standard ranges of atomic and residue volumes are computed in 64 highly resolved and well-refined protein crystal structures using the classical Voronoi procedure. Deviations of the atomic volumes… Expand
Variability in leaf chlorophyll concentration among fully-fertilized corn hybrids
Abstract Several studies have reported that corn (Zea mays L.) hybrids differ in leaf chlorophyll concentration (LCC) to the extent that Minolta SPAD 502 meter data have to be normalized (values… Expand
Carbon and nitrogen stoichiometry and nitrogen cycling rates in streams
Stoichiometric analyses can be used to investigate the linkages between N and C cycles and how these linkages influence biogeochemistry at many scales, from components of individual ecosystems up to… Expand
Plant community and bare ground trends on Fort Riley, Kansas: Implications for monitoring of a highly disturbed landscape
Abstract The Land Condition Trend Analysis (LCTA) program was developed by the US Army and implemented on Fort Riley, Kansas, to monitor trends in plant communities so that managers could maintain… Expand
Long-Term Community Dynamics of Small Landbirds with and Without Exposure to Extensive Disturbance from Military Training Activities
- J. W. Rivers, P. S. Gipson, D. Althoff, J. Pontius
- Geography, Medicine
- Environmental management
- 19 January 2010
Military training activities are known to impact individual species, yet our understanding of how such activities influence animal communities is limited. In this study, we used long-term data in a… Expand
Vegetation of prairie dog colonies and non-colonized shortgrass prairie.
Black-tailed prairie dogs have declined by 98% in the past century. Due to continued declines, the U. S. Fish and Wildlife Service designated the species as a candidate for listing in 2000. Prairie… Expand
Nonparametric Estimation of Insect Stage Transition Times
Consider an experiment on an insect where the stages (or stadia) can only be observed by sacrificing the insect or its habitat. Choose a fixed sequence of samples in time. At each sample time,… Expand
Strip Adaptive Cluster Sampling: Probability Proportional to Size Selection of Primary Units
- J. Pontius
- 1 September 1997
SUMMARY Strip adaptive cluster sampling is extended to situations where the primary units have unequal numbers of secondary units. Primary units are selected with replacement and with probabilities… Expand
Jackknife Estimator of Species Richness with S-PLUS
An estimate of the number of species, S , usually called species richness by ecologists, in an area is one of the basic statistics used to ascertain biological diversity. Traditionally ecologists… Expand
Research notes: passive integrated transponder tags as markers for chicks.
Passive integrated transponder (PIT) tags have been used to mark a variety of organisms and have potential for marking poultry chicks. We examined the effects of PIT tags subcutaneously implanted in… Expand