Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: November 20, 1999
Publication Date: December 10, 1999
Citation: Sanderson, M.A., Tracy, B.F., Gustine, D.L., Byers, R.A. 1999. Diversity indexes and their use in temperatue grazing land research[abstract]. Agronomy Abstracts. p. 146. Technical Abstract: The diversity of plant and animal species is important in the function of temperate grazingland ecosystems. Measurement of diversity, however, is not straightforward and can be complicated by several factors, including the scale of inference. Species richness (number of species per unit area) is the simplest measure of diversity and many times the most useful. Richness, however, does not convey information on the uniformity of specie distribution (evenness). Diversity indexes such as the Shannon-Weaver or Simpson index incorporate evenness terms. Scale of measurement also affects index interpretations. We will discuss the use of different indexes in grazinglands research with examples from grazing management, a plant species diversity survey, molecular biology, and insect diversity experiments at various scales.