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Addressing semantics and historical data heterogeneities in ross-temporal landscape analyses
Södertörn University, School of Life Sciences, Environmental science. Stockholm University.
Stockholm University.
2010 (English)In: Agriculture, Ecosystems & Environment, ISSN 0167-8809, E-ISSN 1873-2305, Vol. 139, no 4, 516-521 p.Article in journal (Refereed) Published
Abstract [en]

The process of recreating historical land cover dynamics, needed to nderstand trends and transient states in ecosystems, includes ifficulties such as the sensitivity of applied spatial analyses to eterogeneities in historical material. This paper compares the handling f quantitatively dominating categories in two matrix analyses of land over change within a Swedish boreal landscape (1725-1859). The focus is n how inconsistencies between historical maps can be handled without iolating the inherent semantic potential. The study shows that analyses f land cover support different indications of change depending on the reatment of dominating categories. The type of landscape and research uestions in focus should therefore be part of choosing matrix method nd classification scheme. The observed patterns need to be evaluated gainst drivers of change and semantic plasticity in classification chemes to separate ecological change from semantic confusion. This aper recommends aggregated classification schemes with maintained riginal relationships between categories in comprehensive analyses. owever, no pathway is persistent over time and categories should be llowed to disappear and new to appear. Analysis of historical dynamics ith extended transition matrixes is recommended to account for the ynamics of small categories in relation to dominating categories within landscape.

Place, publisher, year, edition, pages
2010. Vol. 139, no 4, 516-521 p.
National Category
Environmental Sciences related to Agriculture and Land-use
Identifiers
URN: urn:nbn:se:sh:diva-13701DOI: 10.1016/j.agee.2010.09.011ISI: 000287277100009ScopusID: 2-s2.0-78650747269OAI: oai:DiVA.org:sh-13701DiVA: diva2:462047
Available from: 2011-12-06 Created: 2011-12-06 Last updated: 2016-03-14Bibliographically 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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