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Demographic studies of homosporous fern populations in South Siberia I. I. Gureeva

By: Gureeva, Irina IMaterial type: ArticleArticleSubject(s): Южная Сибирь | лесные папоротники | гаметофиты | сапрофитыGenre/Form: статьи в сборниках Online resources: Click here to access online In: Pteridology in the new millennium : NBRI Golden Jubilee volume P. 341-364Abstract: This paper presents the results of demographic studies in populations of six forest fern species - Athyrium dislenlifolium Tausch ex Opiz, A. filix-femina (L.) Roth. Dryopleris earlliusiana (Vill.) H.P. Fuchs. D. expansa (Presl) Fras.-Jenk. and Jermy. D. filix-mas (L.) Schott, and Mutleiiccia slruihiopteris (L.) Tod. - in ecosystems of South Siberia. In natural conditions fern populations include gametophyte and sporophyte settlements isolated from each other due to the occupation of different ecological microniches in coenoses. Gametophyte settlements demonstrate complex sex composition and develop in 'safe sites' in coenoses. Separate gametophytes or gametophyte settlements of Dryopleris earlliusiana. D. expansa, and D. filix-mas develop on rotten litter (trunks and branches) whereas gametophytes of Athyrium distentifolium. A. filix-femina develop on naked soil. Sporophyte settlements are formed by individuals of different ages. Age composition of sporophyte settlements depends on ability of sporophytes to reproduce vegetatively and the possibility of renovation through sexual means.
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Библиогр.: с. 362-364

This paper presents the results of demographic studies in populations of six forest fern
species - Athyrium dislenlifolium Tausch ex Opiz, A. filix-femina (L.) Roth. Dryopleris earlliusiana
(Vill.) H.P. Fuchs. D. expansa (Presl) Fras.-Jenk. and Jermy. D. filix-mas (L.) Schott, and Mutleiiccia
slruihiopteris (L.) Tod. - in ecosystems of South Siberia. In natural conditions fern populations include
gametophyte and sporophyte settlements isolated from each other due to the occupation of different
ecological microniches in coenoses. Gametophyte settlements demonstrate complex sex composition
and develop in 'safe sites' in coenoses. Separate gametophytes or gametophyte settlements of
Dryopleris earlliusiana. D. expansa, and D. filix-mas develop on rotten litter (trunks and branches)
whereas gametophytes of Athyrium distentifolium. A. filix-femina develop on naked soil. Sporophyte
settlements are formed by individuals of different ages. Age composition of sporophyte settlements
depends on ability of sporophytes to reproduce vegetatively and the possibility of renovation through
sexual means.

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