Darbo tikslas yra ištirti kriptogamų rūšių įvairovės dėsningumus skirtingo miškų ūkinės veiklos intensyvumo senuose plačialapių ir mišriuose su plačialapiais medžiais miškuose. Tikslui pasiekti buvo iškelti šie darbo uždaviniai: 1. Nustatyti indikatorinių kriptogamų rūšių skaičių ir gausą skirtingo miškų ūkinės veiklos intensyvumo brandžiuose medynuose; 2. Nustatyti pagrindinius veiksnius, turinčius įtaką indikatorinių kriptogamų rūšių skaičiui ir gausai. 3. Įvertinti skirtingo miškų ūkinės veiklos intensyvumo įtaką indikatorinių kriptogamų rūšių skaičiui ir gausai. 4. Įvertinti indikatorinių kriptogamų rūšių grupes pagal jų augimo vietą ir aplinkos sąlygas. / The objective was to investigate regularities of diversity of cryptogam species in old broadleaved and mixed forests of different forest management intensity. The research was based on the following hypothesis: cryptogam species richness and abundance in a pristine forest are at least twice bigger than in a commercial forest; even extensive forest cutting has a long-term negative impact on rare cryptogam species; coarse dead wood is an extremely important substratum which maintains high cryptogam diversity in the forest; coarse dead wood is more important than the fine one for rare species survival; decayed dead wood is vital for some rare species survival; multispecied stand increases diversity of substrata and creates favourable conditions for higher number of species. To achieve the objective, the following tasks were set up: 1. To evaluate number and abundance of indicator species of cryptogams in mature stands with different intensity of forest management; 2. To determine main factors, influencing number and abundance of indicator species of cryptogams; 3. To evaluate impact of different intensity of forest management on the number and abundance of indicator species of cryptogams; 4. To evaluate groups of indicator species of cryptogams according to their growing place and environmental conditions.

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Magister en Ciencias Biológicas mención Ecología Facultad de Ciencias / Life-history attributes could be used to predict species responses to habitat fragmentation or sensitivity. We compared the incidence and sensitivity to fragmentation of four understory birds (Rhinocryptidae family). Rhinocryptids inhabit deciduous forests of Central Chile and our study was conduced in a landscape mosaic of pine (Pinus radiata) plantations and native forest fragments. Sensitivity was positively and strongly correlated with rhinocryptid incidence. Understory structure was the main factor that predicted rhinocryptid presence and abundance. The least sensitive species, Andean (Scytalopus magellanicus fuscus) and the Ochre-flanked Tapaculo (Eugralla paradoxa), were positively associated to dead pine branches and negatively to forest fragment size. Rhinocryptids reduced their abundance in mature forest, but they were willing to cross between different habitat types. However, one of the most sensitive species, Chestnut-throated Huet-Huet (Pteroptochos castaneus), did not move from forest fragments to pine with poor understory when we displayed playback trials. Overall, rhinocryptid species are affected by fragmentation depending of their life-history attributes. The less sensitive species profited from habitat and landscape transformations. We conclude that rhinocryptids could persist in this landscape, as changes in habitat conditions do not become deleterious, such as understory structure.