%0 Article
%T North European platyphyllous forests: biodiversity dynamics and climate changes in northwest European Russia.
%A Chtchoukine, Anton K.
%D 1996
%J Silva Fennica
%V 30
%N 2–3
%R doi:10.14214/sf.a9245
%U https://silvafennica.fi/article/5600
%X <p>Distribution, biodiversity and reforestation dynamics of the platyphyllous forests in the Northwest European Russia were investigated. Data assembled from 21 landscape regions (250–350 km<sup>2</sup> each) show special features of small-leaved lime (<em>Tilia cordata</em> Mill., Norway maple (<em>Acer platanoides</em> L.), mountain elm (<em>Ulmus glabra</em> Mill.) and English oak (<em>Qurecus robur</em> L.) reforestation during the last two decades. New tendencies were found for the taiga areas with natural Norway spruce (<em>Picea abies</em> (L.) H. Karst.) and Scots pine (<em>Pinus sylvestris</em> L.) vegetation. Natural platyphyllous reforestation in cut spruce areas poses as supposed a special question for forest management policy in the relationship to global climate changes. Feasible unsustainability of the common types of succession (Norway spruce - European birch (<em>Betula pendula</em> Roth); Norway spruce - European aspen <em>(Populus tremula</em>&nbsp;L.)) is discussed. Biodiversity of herbs, shrubs and tree species of platyphyllous forests is high and complex and is situated in 4–15 old-growth relics in each landscape region. Low-level genotype heterogeneity of nemoral flora species of such isolated populations is presumed. Special biodiversity conservation regulations are proposed.</p>