We used classic sample plot data of Rauno Ruuhijärvi and Seppo Eurola from the early 1960s to compare Cajanderian site types of boreal Picea abies mires in Finland with a classification made with a multivariate method. Classic site types explained the compositional variation in the NMDS ordination better than the analysis, based on numerically derived clusters. Distinct compositional gradients were the poor—rich gradient and the peat thickness (paludification). Additionally, one could interpret a microtopographic gradient in the results. Our results, as well as some other studies support a view that climatic factors affect more than the bedrock the species richness in boreonemoral—boreal Picea abies mires of northern Europe. Soil chemical features (poor—rich gradient) and the microtopography modify the species richness at a site scale. Geographic speciesrichness centre of boreal-temperate Picea abies mires of Europe is unknown, but it is in relation at least to climate, to bedrock and to historical aspects.
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1 May 2018
Boreal Picea abies Mires of Finland: Cajanderian Site Types and Compositional Gradients in Relation to Species Richness
Jarmo Laitinen,
Eero Kaakinen,
Jari Oksanen,
Miia Saarimaa,
Rauno Ruuhijärvi
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Annales Botanici Fennici
Vol. 55 • No. 1–3
May 2018
Vol. 55 • No. 1–3
May 2018