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Betydelse av lövinslag, död ved och variation i träddiameter för artrikedomen hos småfåglar
Linköping University, Department of Physics, Chemistry and Biology.
2011 (Swedish)Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesisAlternative title
Importance of deciduous trees, dead wood and variation in tree diameter for species richness in birds (English)
Abstract [en]

Forest management contributes to the changes in forest structure by turning heterogenous forests of varied age into homogenous forests of similar age and thus affect bird species depending on different structures or habitats which are lost during forestry. In this report, a study was made to investigate how the amount of decidious trees, dead wood and variation in tree diameter affect bird diversity. The purpose of this study was to be able to give forest management guidelines to increase bird diversity. This study was conducted by investigating 65 transects in forests of different structure south of Linköping, Sweden. Along the 65 transects, birds were inventoried as well as the vegetation. The trees were measured in 5 circles along each transect. The data from the investigations both on birds and vegetation were analysed by using generalized linear models. The results showed that amount of deadwood and variation in tree diameter had the strongest effects on bird diversity, and to some extent the amount of decidious trees. By applying this knowledge of the positivt effects on birds when increasning the amount of deadwood, decidious trees and variation in tree diameter in the forests, it is possible to create better conditions for maintaining species richness and diversity.

Place, publisher, year, edition, pages
2011. , 13 p.
Keyword [en]
Forest management, bird diversity, CV, dead wood, decidious trees, generalized linear model, heterogeneity, homogeneity
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-69560ISRN: LiTH-IFM- Ex--11/2503--SEOAI: oai:DiVA.org:liu-69560DiVA: diva2:428994
Subject / course
Theoretical Biology
Uppsok
Life Earth Science
Supervisors
Examiners
Available from: 2011-08-09 Created: 2011-07-01 Last updated: 2011-08-09Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf