TY  - GEN
AU  - Gureeva,Irina I.
TI  - Demographic studies of homosporous fern populations in South Siberia
KW  - Южная Сибирь
KW  - лесные папоротники
KW  - гаметофиты
KW  - сапрофиты
KW  - статьи в сборниках
N1  - Библиогр.: с. 362-364
N2  - 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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ER  -