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Mônica Sberze Ribas Gonçalo Ferraz Mario Cohn-Haft

“ Second growth as habitat to nocturnal birds: comparing occurrence between primary forest and disturbed environments ". Mônica Sberze Ribas Gonçalo Ferraz Mario Cohn-Haft. Future second growth sites?. Amazon deforestation. Fearnside , unp. data. Impacts of deforestation on forest species.

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Mônica Sberze Ribas Gonçalo Ferraz Mario Cohn-Haft

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  1. “Second growth as habitat to nocturnal birds: comparing occurrence between primary forest and disturbed environments" Mônica Sberze Ribas Gonçalo Ferraz Mario Cohn-Haft

  2. Future second growth sites? • Amazon deforestation Fearnside, unp. data

  3. Impacts of deforestation on forest species www.seppo.net

  4. Increase in second growth area • Wright e Muller Landau 2006

  5. Objective • Compare the occupancy of primary forest and second growth sites by nocturnal birds.

  6. Focal species Nyctibiidae Nyctibiusgriseus Nyctibiusleucopterus Caprimulgidae Nyctidromusalbicollis Caprimulgusnigrescens Strigidae Glaucidiumharhyi Lophostrixcristata Cohn-Haft et al. 1997

  7. Study area

  8. Sampling points

  9. Analysis that incorporate reality of the sampling process • Estimate occupancy (Ψ) accounting for imperfect detection (p) Likelihood approach: What is the probability of obtaining a line of data given a model? 0 1 0 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 • Co-variables – logit (Ψ) = β0 + β1cap Mackenzie et al. 2002, Hines 2004

  10. Co-variables incorporated to the models

  11. Influence of second growth in occupancy

  12. Caprimulgidae and Strigidae pairs

  13. Nyctibiidae pair – comparison between primary forest and second growth

  14. Nyctibiidae pair – second growth modeling occurrence

  15. Is second growth suitable for forest species? • Expected (G. hardyi, M. watsonii, N. griseus, N. leucopterus, N. albicollis) • Surprises (L. cristata, P. perspicillata, C. nigrescens e N. bracteatus) • What exactly are they doing there?

  16. Aknowledgments • Rita Mesquita • Ajudantes de campo

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