| Titre : | Multiple spatial scale logistic and autologistic habitat selection models for northern pygmy owls, along the eastern slopes of Alberta's Rocky Mountains |
| Auteurs : | M. D. Piorecky, Auteur ; D. R. C. Prescott, Auteur |
| Type de document : | Article |
| Dans : | Biological Conservation (129(3) MAY 2006) |
| Article en page(s) : | 360-371 |
| Langues: | Anglais |
| Résumé : | Little is known about the distribution and habitat use of nor-them pygmy owls (Glaucidium gnoma), in Alberta or throughout their range. In Alberta they are ranked as 'sensitive', meaning they are not believed to be at immediate risk of extirpation or extinction but may require special attention or protection to prevent them from becoming at risk. Diurnal broadcast surveys were conducted to deter-mine distribution and habitat selection throughout a 28,500 km 2 study area situated along the eastern slopes of the Alberta Rocky Mountains. Surveys lasted for eight weeks in 2001, during which time 1532 site visits were made. Forty-eight responses were recorded at 42 sites representing 40 individual northern pygmy owls. Predictive models of habitat selection were developed using step-wise logistic and autologistic regression. Autologistic models accounted for observed spatial dependencies and as a result, produced better fitting models that more accurately reflect the role of predictor variables in influencing species occurrence. All models considered biophysical variable selection at two spatial scales, the minimum (75 ha) and maximum (300 ha) home range size. Northern pygmy owls showed a preference for older, structurally diverse mixedwood habitats, with line-of-sight enhanced by increased edge and terrain roughness. The use of habitat selection models resulting from this project and Geographic Information Systems as a tool, will enable managers to identify key habitat features, focus future survey efforts, set habitat goals and evaluate the effects of management decisions on current and future habitat availability. (c) 2005 Elsevier Ltd. All rights reserved. |
Bibliothèque Tour du Valat
Se connecter
La Tour du Valat
Institut de recherche pour la conservation des zones humides méditerranéennes- Les publications récentes de la Tour du Valat
- Catalogue en ligne du centre de ressources
- A la une
-
Sélections
- Les écrits de Luc Hoffmann, fondateur de la Tour du Valat
- Des références récentes sur les zones humides méditerranéennes
- Quelques exemples d'impact du changement climatique sur les zones humides
- Quelques références bibliographiques sur la grippe aviaire
- Les recherches de la Tour du Valat sur le saturnisme
- De récentes publications sur la Camargue
- Le fonds Camargue de la bibliothèque
- Coordination géographique
- Nous contacter
Infos pratiques
Heures d'ouverture et contact
Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...
Liens utiles
- 1 - Le site Internet de la Fondation Tour du Valat
- 2 - La base documentaire du Pôle-relais lagunes méditerranéennes
- 3 - Le site Internet consacré aux Oiseaux d'eau en région Méditerranée
- 4 - Le site Internet ObsNature Camargue -Crau-Alpilles - recueil de données d'observations naturalistes
- 5 - Le site Internet de MedWet, l’initiative pour les zones humides méditerranéennes
