Ecological requirements of the three-toed woodpecker (Picoides tridactylus L.) in boreal forests of northern Sweden ...

• Main Author: Balasso, M
• Format: Thesis
• Language: unknown
• Published: University Of Tasmania 2023
• Subjects: Forestry management and environment; Animal behaviour; Climate change impacts and adaptation not elsewhere classified; Norway; Northern Sweden
• Online Access: https://dx.doi.org/10.25959/23221544; https://figshare.utas.edu.au/articles/thesis/Ecological_requirements_of_the_three-toed_woodpecker_Picoides_tridactylus_L_in_boreal_forests_of_northern_Sweden/23221544

The three-toed woodpecker ( Picoides tridactylus L.) is a forest specialist bird, highly dependent on dead and decaying trees for foraging. I investigated the occurrence of the three-toed woodpecker in relation to vegetation characteristics including dead wood in the boreal forests of northern Sweden. Forty old forest stands were studied, were I collected data on living and dead trees, and related them to the occurrence of the three-toed woodpecker during the breeding season. Logistic regression was used to model the occurrence of the three-toed woodpecker in relation to habitat variables. I found that of all variables taken in consideration, the amount of freshly dead Norway spruce ( Picea abies L.) contributed most to explaining the occurrence of three-toed woodpecker. The probability to find three-toed woodpecker in a stand increased with the basal area of freshly dead spruce, the size of the stand, the basal area of living deciduous trees and that of dying Scots pines. A probability of occurrence of 0.5 ...