Zawadzkas, P. P. and W. G. Abrahamson. 2003. Composition and tree-size distributions of the Old-Growth Forest, Snyder County, Pennsylvania. 68: 31-42. . Castanea Acknowledgments We thank Steve Jordan and Matt McTammany for their insightful comments and suggestions throughout the development of This exercise was stimulated by the methods exercises in Curtis EcoSampler. and Cottam's Plant Ecology Workbook (1962). Contacts for Problems or Questions Warren G. Abrahamson ; Mike R. Weaver Appendix Definitions of Abundance Measures (Brower 1998) Area Method: et al. Method: In the formula, the term area’ refers to the size of the area, in the same units as those for the mean area ‘unit per plant. For example, if density is to be expressed per hectare, but the mean area per plant is in units of m2, the unit area value would be 10,000 (the number of m2 in a hectare). \ Definitions of Species Diversity and Dispersion (Brower 1998) et al. Shannon-Wiener Index ()
Zawadzkas, P. P. and W. G. Abrahamson. 2003. Composition and tree-size distributions of the Old-Growth Forest, Snyder County, Pennsylvania. Castanea 68: 31-42. . Acknowledgments We thank Steve Jordan and Matt McTammany for their insightful comments and suggestions throughout the development of EcoSampler. This exercise was stimulated by the methods exercises in Curtis and Cottam's Plant Ecology Workbook (1962). Contacts for Problems or Questions Warren G. Abrahamson ; Mike R. Weaver Appendix Definitions of Abundance Measures Area Method: (Brower et al. 1998) Method: In the formula, the term ‘unit area’ refers to the size of the area, in the same units as those for the mean area per plant. For example, if density is to be expressed per hectare, but the mean area per plant is in units of m2, the unit area value would be 10,000 (the number of m2 in a hectare). \ Definitions of Species Diversity and Dispersion (Brower et al. 1998) Shannon-Wiener Index ()