Ecological Archives E094-141-A6

Erik A. Beever, S. Z. Dobrowski, J. Long, A. R. Mynsberge, N. B. Piekielek. 2013. Understanding relationships among abundance, extirpation, and climate at ecoregional scales. Ecology 94:1563–1571. http://dx.doi.org/10.1890/12-2174.1

Appendix F. Example of a diagnostic plot suggested by Ver Hoef and Boveng (2007) to evaluate the use of a quasi-Poisson vs. negative-binomial model.

FigF1

Fig. F1. Example of a diagnostic plot suggested by Ver Hoef and Boveng (2007) to evaluate the use of a quasi-Poisson vs. negative-binomial model. The full-model estimate of over-dispersion was 6.7 for the 1990s data.


 

Literature Cited

Ver Hoef, J. M., and P. L. Boveng. 2007. Quasi-Poisson vs. negative binomial regression: how should we model overdispersed count data? Ecology 88:2766–2772.


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