Finns det lämpliga habitat för den vitryggiga hackspetten i Luleå kommun?

Translated title of the thesis: Are there suitable habitats in the municipality of Luleå for the white-backed woodpecker?
  • Anna Vyöni

Student thesis: Bachelor

Abstract

Because of the expanding modern forestry where pine and spruce have a higher economical value than deciduous trees, the deciduous forests have decreased drastically and therefore also the Whitebacked Woodpecker (Dendrocopos leucotos). I have chosen to examine the probability for nesting White-backed Woodpecker in this essay, in particular if the areas invented for this essay constitute suitable habitat for the species to nest in, and what measures should be taken if the result declares the areas unsuitable. Through field inventory, data have been generated about the volume of each tree species and volume of dead wood.

In area A, 55% of the total volume (m3sk) consists of birch. 22% consists of spruce, which is a high value for a suitable nesting habitat for the white-backed woodpecker. All living deciduous trees together is 65%. The dead trees are 7.3% of the volume, which is way lower than the recommended limit (>20%) for a suitable habitat. In area B, 59.7% of the total volume consists of birch. 22.1% consists of spruce. All living deciduous trees together is 68.9%. The dead trees are 3.4% which is way lower than the recommended limit for a suitable habitat.

The results show that the areas are not suitable for the time being. I discuss if the method used may in fact under-estimate the study area’s quality as a nesting habitat. Among other things, that the dying trees are not considered, only those that are completely dead.

Date of Award2020-Mar-27
Original languageSwedish
SupervisorElmberg Johan (Supervisor) & Elisabeth Einarsson (Examiner)

Educational program

  • Landscape Science Programme

University credits

  • 15 HE credits

Swedish Standard Keywords

  • Ecology (10611)

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