The analysis of spatio-temporal forest changes (1775–2000) in Flanders (northern Belgium) indicates habitat-specific levels of fragmentation and area loss
Spatio-temporal forest changes can have a progressive negative impact on the habitat of species that need forest continuity, i.e. the continuous presence of forest. Long-term species data that demonstrate such an impact are often not available. Instead we applied a spatial analysis on maps of the historical and present-day forests, by calculating landscape indices that explain forest plant species diversity.
We digitized for this purpose, forests in Flanders (northern Belgium, ~13,500 km2) at four time slices (1775, 1850, 1904–1931, 2000) and created a map of forest continuity in 2000. The ecological relevance of the analysis was further enhanced by a site classification, using a map of potential forest habitat types based on soil–vegetation relationships.
Our results indicated that, between 1775 and 2000, forests occupied 9.7–12.2 % of the total study area. If continuity was not taken into consideration, forest fragmentation slightly increased since 1775. However, only 16 % of the forest area in 2000 remained continuously present at least since 1775 and is therefore called ancient forest (AF). Moreover, connectivity of forest that originated after 1775, called recent forest, was low and only 14 % was in physical contact with AF. The results were habitat-specific as forest on sites that are potentially suitable for a high number of slow-colonizing species, e.g. ancient forest plants, were affected most.
We discuss that a GIS analysis of this kind is essential to provide statistics for forest biodiversity conservation and restoration, in landscapes with a dynamic and heterogeneous forest cover.
KeywordsConnectivity GIS Historical ecology Historical maps Land-use change Land-use reconstruction Landscape metrics Recovery potential
We would like to thank Marc Esprit who accomplished most of the laborious digitization work, and the Nature and Forest Agency who put the forest inventory sample points to our disposal. This research was the result of project VLINA/C97/06b, funded by the Flemish Community.
- AGIV (2001) Digital forest reference layer 2000. Flemish Geographical Information Agency and the Nature and Forest Agency of the Flemish Community. http://metadata.agiv.be/Details.aspx?fileIdentifier=63D62DD2-E800-4406-BF59-74DF33D109E1. Accessed Feb 2013
- Bos+ (2012) Bosbarometer 2012: waar blijven de daden? Bos+, Melle. http://www.bosplus.be/images/stories/kenniscentrum/bosbeleid/bosbarometer/. Accessed Jan 2013
- Carstensen B, Plummer M, Laara E, Hills M (2013) Epi: A Package for Statistical Analysis in Epidemiology. R package version 1.1.49. http://CRAN.R-project.org/package=Epi Accessed May 2014
- Cornelis J, Hermy M, Roelandt B, De Keersmaeker L, Vandekerkhove K (2009) Bosplantengemeenschappen in Vlaanderen, een typologie van bossen gebaseerd op de kruidlaag. Agentschap voor Natuur en Bos en Instituut voor Natuur- en Bosonderzoek, BrusselsGoogle Scholar
- De Frenne P, Baeten L, Graae BJ, Brunet J, Wulf M, Orczewska A, Kolb A, Jansen I, Jamoneau A, Jacquemyn H, Hermy M, Diekmann M, De Schrijver A, De Sanctis M, Decocq G, Cousins SA, Verheyen K (2011) Interregional variation in the floristic recovery of post-agricultural forests. J Ecol 99:600–609Google Scholar
- De Keersmaeker L, Rogiers N, Vandekerkhove K, De Vos B, Roelandt B, Cornelis J, De Schrijver A, Onkelinx T, Thomaes A, Hermy M, Verheyen K (2013) Application of the ancient forest concept to Potential Natural Vegetation mapping in Flanders, a strongly altered landscape in Northern Belgium. Folia Geobotanica 48:137–162CrossRefGoogle Scholar
- Desender K, Ervynck A, Tack G (1999) Beetle diversity and historical ecology of woodlands in Flanders. Belg J Zool 129:139–156Google Scholar
- Dondeyne S, Van Ranst E, Deckers J (2012) Converting the legend of the soil map of Belgium into the World Reference Base for soil resources. KU Leuven and UGent, LeuvenGoogle Scholar
- IUSS Working Group WRB (2006) World reference base for soil resources 2006. A framework for international classification, correlation and communication. World soil resources report 103, FAO, RomeGoogle Scholar
- Lindbladh M, Brunet J, Hannon G, Niklasson M, Eliasson P, Eriksson G, Ekstrand A (2007) Forest history as a basis for ecosystem restoration—a multidisciplinary case study in a south Swedish temperate landscape. RestorEcol 15(2):284–295Google Scholar
- Ministerial Conference on the Protection of Forests in Europe (1998) Annex 2 of the resolution L2, Pan-European Operational Level Guidelines for Sustainable Forest Management. Adopted at the Fifth Expert Level Preparatory Meeting of the Lisbon Conference on the Protection of Forests in Europe, 27–29 April 1998, Geneva, Switzerland. http://www.foresteurope.org/docs/MC/MC_lisbon_resolution_annex2.pdf. Accessed June 2013
- Ministerial Conference on the Protection of Forests in Europe (2009) Pan-European guidelines for afforestation and reforestation with a special focus on the provisions of the UNFCCC. Adopted by the MCPFE Expert Level Meeting on 12–13 November 2008 and by the PEBLDS Bureau on behalf of the PEBLDS Council on 4 November 2008.http://www.foresteurope.org/documentos/Pan-EuropeanAfforestationReforestationGuidelines.pdf. Accessed June 2013
- Montréal Process Criteria and Indicators for the Conservation and Sustainable Management of Temperate and Boreal Forests (2009) Technical notes on implementation of the Montréal Process criteria and indicators, criteria 1–7, third edition available from http://www.montrealprocess.org/documents/publications/techreports/2009p_2.pdf. Accessed May 2014
- Riitters KH, Coulston JW, Wickham JD (2003) Localizing national fragmentation statistics with forest type maps. J Forest 101:18–22Google Scholar
- Sereda S, Lukana M (2009) Assessment of changes in land-use development in the Magura and the Eastern Tatras in the years 1772–2003. Oecol Mont 18:1–13Google Scholar
- R Development Core Team (2014). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, http://www.R-project.org/. Accessed May 2014
- Van Landuyt W, Hoste I, Vanhecke L, Van Den Bremt P, Vercruysse W, de Beer D (2006) Atlas van de flora van Vlaanderen en het Brussels Gewest. Flower, Research Institute for Nature and National Botanic Garden of Belgium, BrusselsGoogle Scholar
- Waterinckx M, Roelandt B (2001) De bosinventaris van het Vlaamse Gewest. Ministerie van de Vlaamse Gemeenschap, afdeling Bos and Groen, BrusselGoogle Scholar
- Wulf M, Gross J (2004) Application of the historical Schmettau map (1767–1787) in landscape analysis. In: Verhandlungen der Gesellschaft für Ökologie, Band 34, Giessen, 13–17 September 2004Google Scholar