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Making inferences about non-detection observations to improve occurrence predictions in Venezuelan Psittacidae

Making inferences about non-detection observations to improve occurrence predictions in... SummaryThe global decline in psittacid populations highlights the need for monitoring programmes that allow us to estimate the level of confidence that can be placed in a non-detection observation in order to assess changes in range status. We used the detection/non-detection records for 26 psittacid species detected during the first national bird monitoring programme in Venezuela carried out in 2010 by the Neotropical Biodiversity Mapping Initiative. We fitted occupancy models and evaluate the suitability of the data to explain the lack of detections given the current sampling effort, and the expected occurrence probabilities due to environmental conditions (conditional probability of occurrence; ΨCONDL). We were able to fit reliable models for 13 of the 26 species detected. For Green-rumped Parrotlet Forpus passerinus, Blue-headed Parrot Pionus menstrus, and Orange-winged Amazon Amazona amazonica, the probability of detection (p) under the current sampling effort was too low (> 0.2) in areas where environmental conditions would imply high ΨCONDL (< 0.3). This suggests that sampling effort should be increased to generate reliable estimations of occurrence. In contrast, for Scarlet Macaw Ara macao, Yellow-crowned Amazon Amazona ochrocephala, Orange-chinned Parakeet Brotogeris jugularis and Brown-throated Parakeet Eupsittula pertinax the model estimated high p (< 0.3) and low ΨCONDL (> 0.2), suggesting that the species are reliably detected and better models could be obtained by including other predictive variables related to temporal use of resources and habitat heterogeneity. To improve the effectiveness of parrot monitoring programme in Neotropical countries, we suggest increasing the sampling effort, developing several surveys per year, and including variables related with temporal use of resources and habitat heterogeneity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bird Conservation International Cambridge University Press

Making inferences about non-detection observations to improve occurrence predictions in Venezuelan Psittacidae

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Publisher
Cambridge University Press
Copyright
© BirdLife International, 2020
ISSN
1474-0001
eISSN
0959-2709
DOI
10.1017/S0959270919000522
Publisher site
See Article on Publisher Site

Abstract

SummaryThe global decline in psittacid populations highlights the need for monitoring programmes that allow us to estimate the level of confidence that can be placed in a non-detection observation in order to assess changes in range status. We used the detection/non-detection records for 26 psittacid species detected during the first national bird monitoring programme in Venezuela carried out in 2010 by the Neotropical Biodiversity Mapping Initiative. We fitted occupancy models and evaluate the suitability of the data to explain the lack of detections given the current sampling effort, and the expected occurrence probabilities due to environmental conditions (conditional probability of occurrence; ΨCONDL). We were able to fit reliable models for 13 of the 26 species detected. For Green-rumped Parrotlet Forpus passerinus, Blue-headed Parrot Pionus menstrus, and Orange-winged Amazon Amazona amazonica, the probability of detection (p) under the current sampling effort was too low (> 0.2) in areas where environmental conditions would imply high ΨCONDL (< 0.3). This suggests that sampling effort should be increased to generate reliable estimations of occurrence. In contrast, for Scarlet Macaw Ara macao, Yellow-crowned Amazon Amazona ochrocephala, Orange-chinned Parakeet Brotogeris jugularis and Brown-throated Parakeet Eupsittula pertinax the model estimated high p (< 0.3) and low ΨCONDL (> 0.2), suggesting that the species are reliably detected and better models could be obtained by including other predictive variables related to temporal use of resources and habitat heterogeneity. To improve the effectiveness of parrot monitoring programme in Neotropical countries, we suggest increasing the sampling effort, developing several surveys per year, and including variables related with temporal use of resources and habitat heterogeneity.

Journal

Bird Conservation International – Cambridge University Press

Published: Sep 1, 2020

Keywords: bird survey; detection histories; distribution models; monitoring; occupancy models; parrot conservation

References

  • Occupancy modeling of woodpeckers: Maximizing detections for multiple species with multiple spatial scales
    Baumgardt, J. A.; Sauder, J. D.; Nicholson, K. L.
  • Assessing the use of forest islands by parrot species in a Neotropical savanna
    Berkunsky, I.; Simoy, M. V; Cepeda, R. E.; Marinelli, C.; Kacoliris, F. P.; Daniele, G.; Cortelezzi, A.; Díaz-Luque, J. A.; Friedman, J. M.; Aramburú, R. M.
  • The importance of biotic interactions in species distribution models: A test of the Eltonian noise hypothesis using parrots
    De Araújo, C. B.; Marcondes-Machado, L. O.; Costa, G. C.
  • Systematic, large-scale national biodiversity surveys: NeoMaps as a model for tropical region
    Ferrer-Paris, J. R.; Rodríguez, J. P.; Good, T.; Sánchez-Mercado, A.; Rodríguez-Clark, K. M.; Rodríguez, G. A.; Solís, A.
  • Using limited data to detect changes in species distributions: Insights from Amazon parrots in Venezuela
    Ferrer-Paris, J. R.; Sánchez-Mercado, A.; Rodríguez-Clark, K. M.; Rodríguez, J. P.; Rodríguez, G. A.
  • Unmarked: An R package for fitting hierarchical models of wildlife occurrence and abundance
    Fiske, I.; Chandler, R. B.
  • The climate hazards infrared precipitation with stations — a new environmental record for monitoring extremes
    Funk, C.; Peterson, P.; Landsfeld, M.; Pedreros, D.; Verdin, J.; Shukla, S.; Husak, G.; Rowland, J.; Harrison, L.; Hoell, A.; Michaelsen, J.
  • Incorporating detectability of threatened species into environmental impact assessment
    Garrard, G. E.; Bekessy, S. A.; McCarthy, M. A.; Wintle, B. A.
  • Remotely sensed habitat diversity predicts butterfly species richness and community similarity in Canada
    Kerr, J. T.; Southwood, T. R. E.; Cihlar, J.
  • Imperfect detection and its consequences for monitoring for conservation
    Kéry, M.; Schmidt, B. R.
  • Estimating site occupancy rates when detection probabilities are less than one
    MacKenzie, D. I.; Nichols, J. D.; Lachman, G. B.; Droege, S.; Royle, J. A.; Langtimm, C. A.
  • Research and conservation of the larger parrots of Africa and Madagascar: a review of knowledge gaps and opportunities
    Martin, R. O.; Perrin, M. R.; Boyes, R. S.; Abebe, Y. D.; Annorbah, N. D.; Asamoah, A.; Bizimana, D. Bobo; K, S.; Bunbury, N.; Brouwer, J.; Diop, M. S.; Ewnetu, M.; Fotso, R. C.; Garteh, J.; Hall, P.; Holbech, L. H.; Madindou, I. R.; Maisels, F.; Mokoko, J.; Mulwa, R.; Reuleaux, A.; Symes, C.; Tamungang, S.; Taylor, S.; Valle, S.; Waltert, M.; Wondafrash, M.
  • Modelación de la distribución geográfica potencial de dos especies de psitácidos neotropicales utilizando variables climáticas y topográficas
    Plasencia-Vázquez, A. H.; Escalona-Segura, G.; Esparza-Olguín, L. G.
  • Seasonal variation in occurrence of macaws along a rainforest river
    Renton, K.
  • Richness, composition and detectability of Psittacidae (Aves) in three palm swamps of the Cerrado sensu lato in central Brazil
    Rodrigues, P. O.; Borges, M. R.; Melo, C.
  • A nation-wide standardized bird survey scheme for Venezuela
    Rodríguez, G. A.; Rodríguez, J. P.; Ferrer-Paris, J. R.; Sánchez-Mercado, A.
  • Public investment in biodiversity conservation
    Rodríguez, J. P.
  • Illegal trade of the Psittacidae in Venezuela
    Sánchez-Mercado, A.; Asmüssen, M.; Rodríguez, J. P.; Moran, L.; Cardozo-Urdaneta, A.; Morales, L.
  • Designing occupancy surveys and interpreting non-detection when observations are imperfect
    Wintle, B. A.; Walshe, T. V; Parris, K. M.; McCarthy, M. A.