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dc.contributor.authorNygaard, Per Holm
dc.contributor.authorStrand, Line Tau
dc.contributor.authorStuanes, Arne
dc.date.accessioned2018-06-29T07:55:17Z
dc.date.available2018-06-29T07:55:17Z
dc.date.created2018-01-19T10:53:53Z
dc.date.issued2018
dc.identifier.citationEcology and Evolution. 2018, 8 (1), 462-476.nb_NO
dc.identifier.issn2045-7758
dc.identifier.urihttp://hdl.handle.net/11250/2503703
dc.description.abstractStand dynamics and the gap initiation prior to gap formation are not well- understood because of its long- term nature and the scarcity of late- successional stands. Reconstruction of such disturbance is normally based on historical records and den-droecological methods. We investigated gap initiation and formation at the fine- scale stand level in the old- growth reserve of Karlshaugen in Norway. Given its long- term conservation history, and thorough mapping in permanent marked plots with spatially referenced trees, it provides an opportunity to present stand development before, during, and after gap formation. Late- successional decline in biomass was recorded after more than 50 years of close to steady state. Gaps in the canopy were mainly cre-ated by large old trees that had been killed by spruce bark beetles. Snapping by wind was the main reason for treefall. Long- term dominance of Norway spruce excluded downy birch and Scots pine from the stand. Comparisons of the forest floor soil prop-erties between the gap and nongap area showed significantly higher concentrations of plant available Ca within the gap area. Plant root simulator (PRS™) probes showed significantly higher supply rates for Ca and Mg, but significantly lower K for the gap compared to the nongap area. Soil water from the gap area had significantly higher C:N ratios compared to the nongap area. Fine- scale variation with increasing distance to logs indicated that CWD is important for leaking of DOC and Ca. Our long- term study from Karlshaugen documents gap dynamics after more than 50 years of steady state and a multiscale disturbance regime in an old- growth forest. The observed dis-turbance dynamic caused higher aboveground and belowground heterogeneity in plots, coarse woody debris, and nutrients. Our study of the nutrient levels of the forest floor suggest that natural gaps of old- growth forest provide a long- lasting biogeo-chemical feedback system particularly with respect to Ca and probably also N. Norway spruce trees near the gap edge responded with high plasticity to reduced competition, showing the importance of the edge zone as hot spots for establishing heterogeneity, but also the potential for carbon sequestration in old- growth forest.
dc.description.abstractGap formation and dynamics after long-term steady state in an old-growth Picea abies stand in Norway: Above- and belowground interactions
dc.language.isoengnb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleGap formation and dynamics after long-term steady state in an old-growth Picea abies stand in Norway: Above- and belowground interactionsnb_NO
dc.title.alternativeGap formation and dynamics after long-term steady state in an old-growth Picea abies stand in Norway: Above- and belowground interactionsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersion
dc.source.pagenumber462-476nb_NO
dc.source.volume8nb_NO
dc.source.journalEcology and Evolutionnb_NO
dc.source.issue1nb_NO
dc.identifier.doi10.1002/ece3.3643
dc.identifier.cristin1547267
cristin.unitcode192,14,0,0
cristin.unitnameMiljøvitenskap og naturforvaltning
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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