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Research article - Peer-reviewed, 2014

Small-scale disturbance and stand structure dynamics in an old-growth Picea abies forest over 54 yr in central Sweden

Hytteborn, Håkan; Verwijst, Theo

Abstract

QuestionsCan 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?LocationNatural, unmanaged boreo-nemoral spruce-dominated forest in eastern central Sweden.MethodsBy re-mapping three plots, ca, 50yr 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.ResultsThe 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.ConclusionsPatch 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.

Keywords

Boreal forest; Forest dynamics; Gap dynamics; Regeneration; Succession; Tree population dynamics

Published in

Journal of Vegetation Science
2014, Volume: 25, number: 1, pages: 100-112
Publisher: WILEY-BLACKWELL

    UKÄ Subject classification

    Ecology
    Forest Science

    Publication identifier

    DOI: https://doi.org/10.1111/jvs.12057

    Permanent link to this page (URI)

    https://res.slu.se/id/publ/67660