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The forest of Vorsø, Denmark: Succession towards a natural, decidous boreal forest influenced by breeding cormorants
Author(s) -
Dal Tommy,
Fabricius Peter,
Nielsen Jørgen
Publication year - 1991
Publication title -
nordic journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 33
eISSN - 1756-1051
pISSN - 0107-055X
DOI - 10.1111/j.1756-1051.1991.tb01277.x
Subject(s) - ecological succession , biology , basal area , biomass (ecology) , taiga , forestry , ecology , geography
The forest on the strictly protected island Vorsø in Horsens Fjord has since 1952 been examined every ten years to discover the number, basal area, wood volume and aboveground biomass of the species. This paper describes the results from 1982 and the development up to that. The dominating species are Fraxinus excelsior, Ulmus glabra and Fagus sylvatica. The two forests, “Vesterskov” (6.09 ha) and “Østerskov” (2.48 ha) respectively, were, in 1982, still immature. Their number of stems per ha were: 756 and 509; basal area: 38 m 2 and 45 m 2 . volume: 544 m 3 and 615 m 3 ; biomass 207 t and 268 t. The annual increase 1972–1982 was respectively 8.8 m 3 /ha and 0.3 m 3 /ha. The impact of the cormorant ( Phalacrocorax carbo sinensis ) is especially in “Østerskov” increasing, since the colony here was established in 1976. The succession of the forest is discussed in relation to the disturbance by the cormorants.