Appendix D. Sampling effort across landscapes in 2005–2007.
|FIG. D1. Mean number of native resident bird species detected in central Jamaica based on cumulative number of point counts in forested, agricultural, peri-urban development, and bauxite mining landscapes pooled across three years (2005–2007). Species accumulation curves were calculated using the sample-based rarefaction index (Mao Tau), rescaled in terms of numbers of individuals (as shown in x-axis, up to 4000 individuals) (Gotelli and Colwell 2001) and computed in EstimateS v. 8.0 (Colwell 2006). Error bars denote ± 95% CI and were calculated using a general binomial mixture model with 100 randomizations (via replacement sampling) (Colwell et al. 2004). Curves quickly approached an asymptote, indicating sampling effort was sufficient in capturing species richness per landscape matrix treatment during the duration of the study. Based on overlapping confidence intervals, species accumulation patterns did not significantly vary among matrix types (at a 0.05 level). For graphical illustration, only a subset of point count samples is displayed.|
Colwell, R. K. 2006. EstimateS: Statistical estimation of species richness and shared species from samples. Version 8.0. Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, USA. http://viceroy.eeb.uconn.edu/estimates
Colwell, R. K., C. X. Mao, and J. Chang. 2004. Interpolating, extrapolating, and comparing incidence-based species accumulation curves. Ecology 85:2717–2727.
Gotelli, N. J., and R. K. Colwell. 2001. Quantifying biodiversity: Procedures and pitfalls in the measurement and comparison of species richness. Ecology Letters 4:379–391.