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Near-natural forests in southern Sweden

silvicultural and palaeoecological aspects on nature-based silviculture

Björse, Gisela (2000). Near-natural forests in southern Sweden. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Silvestria, 1401-6230 ; 134
ISBN 91-576-5868-4
[Doctoral thesis]

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Abstract

Timber production and protection of biodiversity are two main issues in south Swedish forestry. This thesis explores the possibilities of combining the two issues in a nature-based silviculture. Different branches of science, palaeoecology, silviculture and forest vegetation ecology, were combined to give a multidisciplinary approach to the subject. Mimicking the historical forest composition and processes in the silvicultural measures for the benefit of both biodiversity protection and timber production was identified as one possible way of developing a nature-based silviculture. The long period of human influence on the landscape in southern Sweden has effectively removed all the remnants of natural forest that could have been used as references in the mimicking procedure. Consequently, historical references were searched. A method to describe former forest conditions was developed using palaeoecological data and methods. It was found that the historical deciduous dominance was pronounced. Over 2000 years southern Sweden has been transformed from a deciduous to a coniferous landscape. Human activities were shown to be a major driving force in this change. Several detected historical forest types were possible as references for the mimicking approach, but forest types common in the past and rare today were suggested for maximal efficiency in obtaining high biodiversity. Mixed nemoral deciduous forests were pointed out as a historically widespread forest type with very little resemblance in the present landscape. The small fragments left are important for present biodiversity and from many other aspects. Development of a nature-based silvicultural system for the management of mixed nemoral forest stands based on the theory of mimicking was begun. A silvicultural experiment was established in a near-natural, mixed nemoral forest stand in southern Sweden and the early effects of the silvicuitural treatments tested were evaluated with regard to floristic diversity. The early findings indicate that advance growth may be an effective source for regeneration of the forest type. Soil scarification is not recommended when regenerating mixed nemoral deciduous forest stands as the destruction of advance saplings was not compensated by new establishment, and because a tendency towards alteration of the ground flora typical of nemoral forest to a pioneer plant community was traced. Sparse shelterwood cutting is suggested as an appropriate way of combining biodiversity consideration and timber production in mixed nemoral deciduous forest stands. Finally, a framework of an approach to obtain a nature-based silvicultural system was developed, based on the presented results and other information

Authors/Creators:Björse, Gisela
Title:Near-natural forests in southern Sweden
Subtitle:silvicultural and palaeoecological aspects on nature-based silviculture
Year of publishing :2000
Volume:134
Number of Pages:42
Papers/manuscripts:
NumberReferences
ALLI. Björse, G. Bradshaw, R. H. W. and Michelson, D. B. 1996. Calibration of regional pollen data to construct maps of former forest types in southern Sweden. Journal of Paleolimnology, 16:67-78 II. Björse G. and Bradshaw, R. 1998. 2000 years of forest dynamics in southern Sweden: suggestions for forest management. Forest Ecology and Management, 104: 15-26 III. Björse, G. Effects of shelterwood density, soil scari-fication and fencing on natural regeneration within a mixed near-natural nemoral forest stand in southern Sweden. Manuscript IV. Björse, G. Effects of silvicultural treatments on the field layer vegetation and floristic diversity within a mixed, near-nemoral forests stand in southern Sweden. Manuscript V. Bradshaw, R. H. W. and Björse G. Regeneration of deci- dous native tree mixtures with consideration of biodiver- sity in forest stands used for timber production. Manuscript
Place of Publication:Alnarp
ISBN for printed version:91-576-5868-4
ISSN:1401-6230
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:K Forestry > K01 Forestry - General aspects
Subjects:Not in use, please see Agris categories
Agrovoc terms:soil scarification, broadleaved forests, mixed forests, vegetation, nature conservation, biodiversity, multiple use, regeneration, history
Keywords:numoral forest, boreo-nemoral forest, decidous forest, mixed forest, forest history, vegetation dynamics, nature conservation, biodiversity, floristic diversity, mimic, multiple use, shelterwood, soil scarification
URN:NBN:urn:nbn:se:slu:epsilon-3099
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-3099
ID Code:2036
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: Lennart Wiborgh
Deposited On:29 Sep 2010 00:00
Metadata Last Modified:02 Dec 2014 10:15

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