1. Acknowledgement
  2. References

We owe T. M. Blackburn thanks for suggesting that we run simulations of randomly generated data to test the efficacy of our path model. Although we disagree with his conclusions concerning the use of path analysis for explaining influences on extinctions in oceanic avifaunas, we are edified by the exchange of ideas.


  1. Acknowledgement
  2. References
  • Arbuckle, J.L. (2007) Amos 16.0 user’s guide. Amos Development Corporation, Spring House, PA.
  • Blackburn, T.M., Cassey, P., Duncan, R.P., Evans, K.L. & Gaston, K.J. (2004) Avian extinction and mammalian introductions on oceanic islands. Science, 305, 19551958.
  • Blackburn, T.M., Cassey, P., Evans, K.L., Gaston, K.J. & Duncan, R.P. (2009) The biogeography of avian extinctions on oceanic islands revisited. Journal of Biogeography, 36, 16131614.
  • Didham, R.K., Ewers, R.M. & Gemmell, N.J. (2005) Comment on ‘avian extinction and mammalian introductions on oceanic islands’. Science, 307, 14111412.
  • Duncan, R. & Forsyth, D. (2006) Modelling population persistence on islands: mammal introductions in the New Zealand archipelago. Proceedings of the Royal Society B: Biological Sciences, 273, 29692975.
  • Escudero, A., Iriondo, J.M., Olano, J.M., Rubio, A. & Somolinos, R.C. (2000) Factors affecting establishment of a gypsophyte: the case of Lepidium subulatum (Brassicaceae). American Journal of Botany, 87, 861871.
  • Hood, G.M. (2000) PopTools - software for the analysis of ecological models, version 3.0.6. CSIRO. Available at: (last accessed 28 September 2008).
  • Karels, T.J., Dobson, F.S., Trevino, H.S. & Skibiel, A.L. (2008) The biogeography of avian extinctions on oceanic islands. Journal of Biogeography, 35, 11061111.
  • Kline, R.B. (2005) Principles and practice of structural equation modeling. Guilford Press, New York, NY.
  • Li, C.C. (1975) Path analysis: a primer. Boxwood Press, Pacific Grove, CA.
  • Petraitis, P.S., Dunham, A.E. & Niewiarowski, P.H. (1996) Inferring multiple causality: the limitations of path analysis. Functional Ecology, 10, 421431.
  • Steadman, D. & Martin, P.S. (2003) The late Quaternary extinction and future resurrection of birds on Pacific islands. Earth Science Reviews, 61, 133147.
  • Trevino, H.S., Skibiel, A.L., Karels, T.J. & Dobson, F.S. (2008) Importance of causal analysis of threats to oceanic avifaunas: reply to Blackburn et al. Conservation Biology, 22, 495497.