Small-scale disturbance and stand structure dynamics in an old-growth Picea abies forest over 54 yr in central Sweden
Article first published online: 19 MAR 2013
© 2013 International Association for Vegetation Science
Journal of Vegetation Science
Volume 25, Issue 1, pages 100–112, January 2014
How to Cite
Hytteborn, H., Verwijst, T. (2014), Small-scale disturbance and stand structure dynamics in an old-growth Picea abies forest over 54 yr in central Sweden. Journal of Vegetation Science, 25: 100–112. doi: 10.1111/jvs.12057
- Issue published online: 16 DEC 2013
- Article first published online: 19 MAR 2013
- Manuscript Accepted: 17 JAN 2013
- Manuscript Received: 6 SEP 2012
- World Wildlife Fund (WWF)
- Swedish Institute, Växtbiologiska institutionen (now Department of Plant Ecology and Evolution), Uppsala University for fieldwork, and NorFa
- Boreal forest;
- Forest dynamics;
- Gap dynamics;
- Tree population dynamics
Can assumptions of the existence of spatially distinct patches (delineated structurally homogeneous parts of the forest, being either areas consisting of canopy trees or areas without canopy trees but in an early or later regenerative phase) and of directional development over time of the vegetation in such patches, as implied by current theory of storm gap dynamics, be verified by remapping previous study sites?
Natural, unmanaged boreo-nemoral spruce-dominated forest in eastern central Sweden.
By re-mapping three plots, ca, 50 yr after the first inventory, we studied the structure and dynamics of gaps (patches without canopy tree cover) and major tree populations. The old and new maps allowed us to compare two independent assessments of the forest dynamics: one based on tree population changes and one on changes in gap area over time.
The current population structure could partly be described through the earlier-encountered structures of the different tree populations and consecutive processes of recruitment and mortality. However, the re-mapping exercise showed that spatially delineated patches did not develop directionally over time, nor was their development spatially discrete.
Patch dynamics proceeds in such a way that the fate of a single patch may depend on the development of neighbouring patches. As gaps may partly close or merge into larger gaps, and as gap disappearance rate is a function of actual gap size, performance of an initially delimited patch is largely determined by developments in neighbouring patches and cannot be predicted from its momentary patch characteristics. Consequently, we propose an ‘open matrix model’ to describe the changes in a boreo-nemoral spruce forest, rather than a ‘storm gap dynamics’ model.