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Assessing coarse woody debris in Swedish woodland key habitats: Implications for conservation and management
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Responsible organisation
2007 (English)In: Forest Ecology and Management, ISSN 0378-1127, E-ISSN 1872-7042, Vol. 242, no 2-3, 363-373 p.Article in journal (Refereed) Published
Abstract [en]

In the mainland Nordic countries and the Baltic States, the delineation and set-aside of woodland key habitats (WKHs) has been one important approach to conserving biodiversity outside traditional protected areas. Though the specifics of the key habitat concept differ from country to country, the intent is to set aside forest areas that (1) exhibit a low degree of exploitation, (2) host or potentially host red-listed species, and/or (3) contain old-growth characteristics (e.g. dead wood, large old trees) or other qualities considered valuable for maintaining biodiversity. However, it is still uncertain to what extent WKHs actually retain quantities and qualities of coarse woody debris (CWD) that are characteristic of old-growth forests. The Biodiversity Monitoring Programme (BMP) recently conducted a detailed inventory of 491 WKHs across Sweden, providing a large dataset with which to evaluate the effectiveness of the WKH program with respect to CWD. In the present study we analyze the BMP data and compare CWD volume and composition between WKHs, mature managed (stand age 81-120 years), overmature managed (age 121-140 years), and published findings from old-growth forests. The national average volume of CWD (standing and downed combined, m3/ha) was higher in WKHs (19.5) than the mature managed (9.3) and the overmature managed forest (12.2), yet was markedly lower than that reported from old-growth forests. CWD volumes in spruce-dominated WKHs had been reduced by 50-63% in the southern and middle boreal regions to 43-64% in the northern boreal region when compared to old-growth forests. In general, CWD amount, variability and quality were greater within WKHs in the boreal regions as opposed to the nemoral and boreonemoral regions in the south of Sweden. The majority of the WKHs (64%) contained key elements (very large and/or decayed dead wood known to be crucial habitat for many threatened wood-dependent species). Considering that these structures are largely absent from managed forests, WKHs have better retained some of the important features of old-growth forests when compared to the surrounding managed forest. WKHs are therefore valuable habitats for dead wood dependent species and representative focal areas for continued and future forest restoration and landscape planning. Our results confirm that large sun-exposed and burned dead wood are underrepresented CWD components within WKHs and emphasize the need to broaden the WKH definition to include locations containing these structures.

Place, publisher, year, edition, pages
2007. Vol. 242, no 2-3, 363-373 p.
Keyword [en]
Biodiversity Monitoring Programme, Deadwood inventories, Remnants, Set-asides
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:miun:diva-5148DOI: 10.1016/j.foreco.2007.01.054ISI: 000246268100030Scopus ID: 2-s2.0-34047151187Local ID: 4721OAI: oai:DiVA.org:miun-5148DiVA: diva2:30180
Note

VR-Biology

Available from: 2008-09-30 Created: 2009-06-08 Last updated: 2016-10-04Bibliographically approved
In thesis
1. The importance of small forest set-asides for saproxylic biodiversity at stand- landscape- and regional scales
Open this publication in new window or tab >>The importance of small forest set-asides for saproxylic biodiversity at stand- landscape- and regional scales
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet, 2007. 29 p.
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 32
Keyword
boreal forest, colonization-extinction dynamics, dendrochronology, dead-wood dynamics, disturbance dynamics, forest history, fragmentation, metapopulations, national inventories, old-growth forest, picea abies, saproxylic species, set asides, spatiotemporal dynamics, stand reconstructions, tree mortality, woody debris, wood-decaying fungi, woodland key habitats
National Category
Biological Sciences
Identifiers
urn:nbn:se:miun:diva-8896 (URN)978-91-85317-65-3 (ISBN)
Public defence
(English)
Available from: 2009-05-06 Created: 2009-05-06 Last updated: 2009-07-16Bibliographically approved

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Jönsson, Mari TJonsson, Bengt-Gunnar
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CiteExportLink to record
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Citation style
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