OBJECTIVE This study explored new models of diversity for health professions education that incorporate multiple attributes and examined differences in diversity based on urbanicity, geographic region, and institutional structure. METHODS Simpson's Diversity Index was used to develop race, gender, and interprofessional diversity indices for health professions schools in the United States (N =...

assessment of diversity and species richness in the understanding of ecosystem functions, protect and preserve genetic resources, evaluation and control of environmental change and the success or failure will help natural resource management programs. arbitrary banning livestock grazing program and one of the most common and perhaps the most degraded pastures and reduced the diversity and speci...

Several methods for the estimation of functional diversity are employed in plant communities. However, it is hard to select the most suitable measures in practice. This work presents comparisons of nine distance-based measures applied to functional diversity analysis in forest communities (36 plots) along an elevational gradient in the Pangquangou Reserve, China. The employed indices and method...

The diversity-productivity relationship has not been studied as extensively in forests as in other ecosystems. We address this gap in our knowledge by examining the relationship of productivity (primarily the periodic annual increment in aboveground biomass, but also the mean annual increment) with five species diversity indices, stand, and environmental factors. We used 967 naturally regenerat...

Using random amplified polymorphic DNA (RAPD) markers, genetic variation and population structure of wild and cultivated American ginseng growing in West Virginia (WV) was assessed. Also, the effects of cultivation intensity and harvest pressure on genetic diversity of ginseng populations were evaluated. Eight primers were used to amplify DNA samples from 468 plants, generating a total of 98 ba...

In any science it is important to find meaningful measures that describe the systems under study. These measures will be the raw material for theories, and will allow meaningful comparisons between systems. Much of the success of a science depends on the choice of basic measures; poor choices can cause a field to stagnate, while insightful choices can make it easy to find regularities in nature...