Plant age stages during succession in woodland clearing in central Russia //

Ulanova, N.G.

Автор: Ulanova N.G.
Сборник: Vegetation science in retrospect and perspective
Год издания: 2000
Место издания: Opulus Press, Uppsala, Sweden
Первая страница: 80
Последняя страница: 83
Аннотация: The population dynamics of the main woodland clearing species were studied in southern taiga forest (Tver’ region, Russia). Clear-cutting areas of different age were selected in different forest types. For each species 100 - 300 clones were excavated and studied. So-called, ‘age state’ descriptions were defined for the following clonal species: Chamaenerion angustifolium, Calamagrostis epigeios, C. arundinacea, Rubus idaeus and Juncus effusus. Age structure diagrams were produced for each species against age after cutting (or successional stage). The herb population structure in 1 - 2 yr clearings is of an invasive type with mainly virginile ramets. Sexually reproducing ramets predominate in 3-4 yr clearings. The senescence of Chamaenerion angustifolium and Calamagrostis epigeios populations starts after 4 - 5 yr as a result of competition with birch and spruce saplings. Senescence of Rubus idaeus, Calamagrostis arundinacea populations starts later (after 6 - 7 yr) and follows tree canopy closure (aspen and birch). Within 10 yr Rubus idaeus and herb ramets are mostly senile; the population density decreases drastically. Sparse colonies with 1 - 2 shoots of formerly dominating species remain under the young forest canopy. Partial rejuvenation of populations is possible after stand clear-cuttings or at disturbed microsites.
Добавил в систему: Уланова Нина Георгиевна

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Plant age stages during succession in woodland clearing in central Russia //статья

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