Changes in structural inequality in Norway spruce stands on peatland sites after water-level drawdown

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dc.contributor.author Sarkkola, Sakari en
dc.contributor.author Alenius, Virpi en
dc.contributor.author Hökkä, Hannu en
dc.contributor.author Laiho, Raija en
dc.contributor.author Päivänen, Juhani en
dc.contributor.author Penttilä, Timo en
dc.date.accessioned 2005-11-15T10:52:02Z en
dc.date.accessioned 2009-06-17T14:05:13Z
dc.date.available 2005-11-15T10:52:02Z en
dc.date.available 2009-06-17T14:05:13Z
dc.date.issued 2003 en
dc.identifier.citation Canadian Journal of Forest Research 33: 222-231 en
dc.identifier.uri http://hdl.handle.net/1975/426
dc.description.abstract Size-structural dynamics of naturally established Norway spruce (Picea abies (L.) Karst.) stands growing on peatlands drained for forestry were investigated. The study was based on modelling of diameter at breast height (DBH) distributions of repeatedly measured stands in southern Finland. The Weibull function was used to parameterize the DBH distributions and mixed linear models were constructed to characterize the impacts of different ecological factors on stand dynamics. Initially, the positive skewness of the DBH distributions increased after drainage as a result of increases in stem numbers and a reduction in mean diameters. Simultaneously, the size inequality among trees increased. These changes were due to regeneration and (or) ingrowth and indicated only little competition from the larger trees. Subsequently, the DBH distributions changed from positively skewed to normal and finally to negatively skewed resulting from tree growth and a reduction in the number of small DBH trees. This indicated increased asymmetric intertree competition. Size inequality did not change during this later stage in stand development, suggesting a concurrent component of symmetric competition. Thinnings had little impact on DBH distribution trends. The observed stand dynamics allow the allocation of growth resources to the desired crop component by appropriate silvicultural treatments. en
dc.description.sponsorship Ministry of Agriculture and Forestry en
dc.format.extent 410451 bytes en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher NRC Canada en
dc.subject stand structure en
dc.subject stand dynamics en
dc.subject Picea abies en
dc.subject peatlands en
dc.title Changes in structural inequality in Norway spruce stands on peatland sites after water-level drawdown en
dc.type Article en
dc.identifier.laitoskoodi 867 fi
dc.creator.corporateName Metsäekologian laitos fi
dc.creator.corporateName Department of Forest Ecology en
dc.creator.corporateName Skogsekologi, Institutionen för sv

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