The structure of boreal old-growth forests changes at multiple spatial scales over decades

Show simple item record Kulha, Niko Pasanen, Leena Holmström, Lasse Grandpre, Louis de Gauthier, Sylvie Kuuluvainen, Timo Aakala, Tuomas 2020-07-09T15:23:01Z 2020-07-09T15:23:01Z 2020-04
dc.identifier.citation Kulha , N , Pasanen , L , Holmström , L , Grandpre , L D , Gauthier , S , Kuuluvainen , T & Aakala , T 2020 , ' The structure of boreal old-growth forests changes at multiple spatial scales over decades ' , Landscape Ecology , vol. 35 , no. 4 , pp. 843-858 .
dc.identifier.other PURE: 130924367
dc.identifier.other PURE UUID: 901faa86-e85e-4e51-941f-43705d89dfc4
dc.identifier.other WOS: 000517232200002
dc.identifier.other ORCID: /0000-0003-0160-6410/work/77086270
dc.description.abstract Context: Changes in the structure of boreal old-growth forests are typically studied at a specific spatial scale. Consequently, little is known about forest development across different spatial scales. Objectives: We investigated how and at what spatial scales forest structure changed over several decades in three 4 km² boreal old-growth forests landscapes in northeastern Finland and two in Quebec, Canada. Methods: We used canopy cover values visually interpreted to 0.1-ha grid cells from aerial photographs taken at three time points between the years 1959 and 2011, and error distributions quantified for the interpretation. We identified the spatial scales at which canopy cover changed between the time points, and examined the credibility of changes at these scales using the error distributions in Bayesian inference. Results: Canopy cover changed at three to four spatial scales, the number of scales depending on the studied landscape and time interval. At large scales (15.4–321.7 ha), canopy cover increased in Finland during all time intervals. In Quebec, the direction of the large-scale change varied between the studied time intervals, owing to the occurrence of an insect outbreak and a consequent recovery. However, parts of these landscapes also showed canopy cover increase. Superimposed on the large-scale developments, canopy cover changed variably at smaller scales (1.3–2.8-ha and 0.1-ha). Conclusions: Our findings support the idea that the structure of boreal old-growth forests changes at discernible spatial scales. Instead of being driven by gap dynamics, the old-growth forests in the studied regions are currently reacting to large-scale drivers by an increase in canopy cover. en
dc.format.extent 16
dc.language.iso eng
dc.relation.ispartof Landscape Ecology
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject 1181 Ecology, evolutionary biology
dc.subject 4112 Forestry
dc.subject Aerial photography
dc.subject Bayesian inference
dc.subject Canopy cover
dc.subject Northeastern North America
dc.subject Forest dynamics
dc.subject Northern Fennoscandia
dc.subject BLACK SPRUCE
dc.subject TREE GROWTH
dc.subject DYNAMICS
dc.subject CLIMATE
dc.subject DISTURBANCE
dc.subject LANDSCAPE
dc.subject SUCCESSION
dc.title The structure of boreal old-growth forests changes at multiple spatial scales over decades en
dc.type Article
dc.contributor.organization Boreal forest dynamics and biodiversity research group
dc.contributor.organization Department of Forest Sciences
dc.contributor.organization Forest Economics, Business and Society
dc.description.reviewstatus Peer reviewed
dc.relation.issn 0921-2973
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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