Seasonal pattern and extent of asexual reproduction in liverwort species Lophozia ascendens, L. ventricosa and L. longiflora were studied in the Boubínský prales and Milešický prales old-growth forest reserves in the Šumava Mts., South Bohemia. Asexual reproduction was quantified as the number of 1{--}2 -celled gemmae produced per individual shoot. Numbers of gemmae per shoot among sampling months differed significantly as did the numbers of gemmae in samples among Lophozia ascendens, L. ventricosa and L. longiflora among sampling months. Germinability of gemmae was low in early spring, highest in August and September and slightly decreased in October. Spreading potential of gemmae was investigated in the epixylic hepatic Anastrophyllum hellerianum. Gemmae were trapped at different distances (0 {--} 10 m) and directions from the source colonies in two experiments: one was realized in the natural habitat within a forest and the other in an artificial set-up in the open habitat. Dispersal of gemmae showed slight distance dependence both in the natural and open habitats. Habitat requirements (e. g. decay degree, texture, bark cover, log diameter) of the L. ascendens and A. hellerianum were investigated in both reserves, 126 logs were found. Mostly tiny liverworts grew with L. ascendens and A. hellerianum. Both studied species occurred on logs with degree of decay 2 {--} 7 and degree of texture 2 {--} 6.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:49063 |
| Date | January 2008 |
| Creators | HOLÁ, Eva |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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