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Habitat composition and restocking for conservation of the white-backed woodpecker in Sweden
Örebro University, School of Science and Technology.
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In Sweden, intense human land use, especially forestry, has led to profound changes in the landscape over time, especially within the forest ecosystems. A consequence of this is that several specialist species have become endangered. One group of specialists is the woodpeckers. The middle spotted woodpecker became extinct in Sweden in 1982 and the white-backed woodpecker is today Sweden’s most critically endangered forest-living bird. The white-backed woodpecker is dependent on old deciduous forests, rich in dead wood. The woodpecker is areademanding and hence one of the best indicators or umbrella species for biodiversity in this region. A long-term goal within the conservation of the species is to be able to make more accurate predictions of what is needed in the species habitat to establish a viable population, both in terms of composition of landscape and breeding territories. In addition to earlier studies better tools are needed for measuring the distribution of suitable and potential habitats and finding faster ways of creating optimal habitats. In an attempt to secure the future existence of the white-backed woodpecker in Sweden, restocking of birds are carried out. This presupposes availability of suitable habitats as well as strong enough landscape. Due to intense forestry the presumption for the species is, as stated above, alarming. Comparing the different populations around the Baltic Sea and Norway, great differences but also similarities can be seen, in landscape as well as in territory composition. It seems that fragmentation of foraging patches as well as amount of dead deciduous wood within the breeding territory is critical matters. Grey alder stands in Sweden should have high priority in conservation of habitat for the species.

Place, publisher, year, edition, pages
Örebro: Örebro university , 2015. , p. 54
Series
Örebro Studies in Life Science ; 14
Keyword [en]
White-backed woodpecker, Dendrocopos leucotos, Sweden, deciduous forest, suitable habitat, fragmentation, saproxylic insects, captive breeding, restocking
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:oru:diva-46073ISBN: 978-91-7529-101-7 (print)OAI: oai:DiVA.org:oru-46073DiVA, id: diva2:860573
Public defence
2015-11-27, Hörsalen, Musikhögskolan, Örebro universitet, Fakultetsgatan 1, Örebro, 10:00 (English)
Opponent
Supervisors
Note

Funding agency: Swedish Society for Nature Conservation (SSNC)

Available from: 2015-10-13 Created: 2015-10-13 Last updated: 2017-10-17Bibliographically approved
List of papers
1. Usefulness of biophysical proxy data for modelling habitat of an endangered forest species: The white-backed woodpecker Dendrocopos leucotos
Open this publication in new window or tab >>Usefulness of biophysical proxy data for modelling habitat of an endangered forest species: The white-backed woodpecker Dendrocopos leucotos
2011 (English)In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 26, no 6, p. 576-585Article in journal (Refereed) Published
Abstract [en]

Efficient conservation planning in managed forest landscapes requires knowledge about the location of functional habitat for specialised species. We explored the importance of different variables to predict habitat suitability for the white-backed woodpecker (Dendrocopos leucotos Bechstein), a proposed umbrella species in deciduous forest. Specifically, we tested whether biophysical proxy variables indicating management intensity and the occurrence of natural processes constituted a useful complement to traditional remotely sensed data on tree species composition and forest stand age for modelling the woodpecker's habitat. Presence-absence of the woodpecker during the study period (1986-2006) in southwestern Sweden was explained by the area of edge habitats (forest bordering water or farmland) and wetland forest, and location relative to the historical marine limit. The number of years with occurrence of the woodpecker in a territory was explained by the area of forest bordering water and wetland forest. Among traditional forest variables, the area of deciduous forest had a strong positive effect on both woodpecker presence-absence and the number of years with occurrence. The results support the hypothesis that edge habitats and forest types subject to natural processes favouring deciduous trees and dead wood creation are valuable to the woodpecker and should be prioritised in conservation planning.

Place, publisher, year, edition, pages
Taylor & Francis, 2011
Keyword
Conservation planning, deciduous forest, Dendrocopos leucotos, edge habitats, habitat suitability, land-use history, remote sensing
National Category
Biological Sciences
Research subject
Biology
Identifiers
urn:nbn:se:oru:diva-46418 (URN)10.1080/02827581.2011.599813 (DOI)000295400300007 ()2-s2.0-80053307151 (Scopus ID)
Funder
Swedish Research Council Formas
Note

Funding agency: Swedish Society for Nature Conservation; Alvins Fond; Swedish Environmental Protection Agency

Available from: 2015-11-04 Created: 2015-11-04 Last updated: 2017-12-01Bibliographically approved
2. Habitat composition and fragmentation in breeding territories of the white-backed woodpecker Dendrocopos leucotos in Sweden, Finland and Latvia
Open this publication in new window or tab >>Habitat composition and fragmentation in breeding territories of the white-backed woodpecker Dendrocopos leucotos in Sweden, Finland and Latvia
(English)Manuscript (preprint) (Other academic)
National Category
Biological Sciences
Research subject
Biology
Identifiers
urn:nbn:se:oru:diva-46420 (URN)
Available from: 2015-11-04 Created: 2015-11-04 Last updated: 2017-10-17Bibliographically approved
3. Saproxylic beetles in natural and man-made deciduous high stumps retained for conservation
Open this publication in new window or tab >>Saproxylic beetles in natural and man-made deciduous high stumps retained for conservation
2004 (English)In: Biological Conservation, ISSN 0006-3207, E-ISSN 1873-2917, Vol. 118, no 2, p. 163-173Article in journal (Refereed) Published
Abstract [en]

Intensive forest management in Scandinavia has decreased the amount of dead wood required by saproxylic (wood-living) organisms. To reduce this problem, some dead wood is now retained during forest operations, often in the form of man-made high stumps (ca. 4 m high). Most often these stumps are cut with a harvester, although the stumps in this study were made with explosives. The aims of this study were to determine whether such stumps of aspen (Populus tremula) and birch (Betula spp.) could be used by red-listed saproxylic beetles (Coleoptera), and to examine how the fauna of man-made high stumps differs from that of natural stumps. We also studied how tree species, sun-exposure, stage of decay and trunk diameter influenced the fauna. In 169 samples of bark from high stumps 116 saproxylic species were found, of which 21 were red-listed. Many species, including red-listed ones, were more associated with man-made stumps than with natural stumps. However, in total, more species were found in the natural than in the man-made stumps. This is probably because man-made stumps provide a more homogeneous type of wood substrate than natural ones. Among the other variables the difference between aspen and birch was the most important. We conclude that man-made high stumps are valuable habitats for many saproxylic beetle species.

Place, publisher, year, edition, pages
Elsevier, 2004
Keyword
coleoptera, dead wood, CWD, forestry, boreal forest
National Category
Biological Sciences
Research subject
Biology
Identifiers
urn:nbn:se:oru:diva-46419 (URN)10.1016/j.biocon.2003.08.017 (DOI)000221342000005 ()2-s2.0-1842787552 (Scopus ID)
Available from: 2015-11-04 Created: 2015-11-04 Last updated: 2017-12-01Bibliographically approved
4. Captive breeding and restocking of the whitebacked woodpecker Dendrocopos leucotos in Sweden
Open this publication in new window or tab >>Captive breeding and restocking of the whitebacked woodpecker Dendrocopos leucotos in Sweden
(English)Manuscript (preprint) (Other academic)
National Category
Biological Sciences
Research subject
Biology
Identifiers
urn:nbn:se:oru:diva-46421 (URN)
Available from: 2015-11-04 Created: 2015-11-04 Last updated: 2017-10-17Bibliographically approved

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