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Interactions between historical forest composition and ownership affect present composition of older forest in boreal Sweden
Södertörn University, School of Life Sciences, Environmental science. Stockholms universitet.
Södertörn University, School of Life Sciences, Biology.ORCID iD: 0000-0002-5013-6462
(English)Manuscript (preprint) (Other academic)Text
Abstract [en]

In this study we reconstruct forest composition during the 1860s for a 71000 ha area in southern boreal Sweden. The aim is to show how historical ownership and associated anthropogenic disturbances act as a source of heterogeneity in the present-day distribution and composition of coniferous and deciduous forest within the commercial production forest. We use older (>110 years) and mature (70-110 years) forest as response variables in generalized linear models with a binominal error distribution. The explanatory variables include size of zone, historical type of ownership zone (village, company, and farm), amount of forest, and forest type. We focus in particular on investigating effects from interacting explanatory variables. The significant statistical associations in the study indicate that patterns of deciduous and coniferous older patches differ, and that deciduous patches differ in relation to age interval. The oldest deciduous patches, for example, are today more likely on areas that had deciduous cover also in the past and stood on forestland managed by farmers, but less likely on the same habitat managed by companies. We show that there are strong effects on present forest composition from historical ownership and forest composition. We argue that by including local data on past ownership combined with knowledge on use patterns management could be better adapted to local landscape dynamics compared to the application of overly generalized patterns or models of boreal dynamics that excludes interactions with management.

Keyword [en]
biodiversity conservation, heterogeneity, historical material, interacting variables, matrix, sustainable forestry
National Category
Landscape Architecture
Identifiers
URN: urn:nbn:se:sh:diva-29733OAI: oai:DiVA.org:sh-29733DiVA: diva2:911744
Note

Som manuskript i avhandling. As manuscript in dissertation.

Available from: 2011-01-07 Created: 2016-03-14 Last updated: 2016-09-22Bibliographically approved
In thesis
1. Cross-scale perspectives on heterogeneity in Swedish boreal forests
Open this publication in new window or tab >>Cross-scale perspectives on heterogeneity in Swedish boreal forests
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Maintaining species diversity, ecosystem functioning, and socioeconomic values requires continued ecosystem heterogeneity across scales. This thesis aims to bridge gaps between ecological theory, environmental goals, and practical application of sustainable forest management needed to maintain such heterogeneity. Included case studies of boreal Sweden concern three challenges in the cross-scale understanding of heterogeneity: matrix qualities and composition; acquiring and incorporating historical information; and interactions between forest composition and management. Paper I cover three large-scale forest companies in four boreal counties today, outlining available information on matrix qualities and composition from the companies. Papers II-III cover the village scale from 1720s–1850s–present in Dalarna County and papers IV-V the parish scale from 1860s–present in the same county. Geographic Information Systems were used to integrate historical maps with present data, perform spatiotemporal analyses, and extract data for statistical testing in primarily generalized linear models. For the practical realization of sustainable forest management, the results indicate a need for further monitoring across scales to understand matrix composition, especially in relation to small voluntary reservations in a larger spatiotemporal perspective. Historical material can provide information on temporal connectivity and spatial separation between the past and present forest composition from analysis of change trajectories respectively interacting variables. This thesis suggests that models of forest dynamics are more relevant for local implementation of sustainable forest management efforts if including interactions between forest dynamics and ownership as an approximate driver of local change.

Place, publisher, year, edition, pages
Stockholm: Department of Physical Geography and Quaternary Geology, Stockholm University, 2011. 37 p.
Series
Dissertations from the Department of Physical Geography, ISSN 1653-7211 ; 25
Keyword
sustainable forest management, biodiversity conservation, landscape analysis, historical maps, ownership
National Category
Physical Geography
Identifiers
urn:nbn:se:sh:diva-29734 (URN)978-91-7447-206-6 (ISBN)
Public defence
2011-02-11, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, 13:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: Manuscript. Paper 5: Manuscript.

Available from: 2016-03-14 Created: 2016-03-14 Last updated: 2016-03-14Bibliographically approved

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