Search for dissertations about: "Forest herbs"

Showing result 1 - 5 of 10 swedish dissertations containing the words Forest herbs.

2. 1. Linking plant population dynamics to the local environment and forest succession

   Author : Johan Petter Dahlgren; Johan Ehrlén; Ove Eriksson; Mark Rees; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Actaea spicata; Forest herbs; Forest succession; Integral projection model; Plant demography; Plant phenology; Population dynamics; Pre-dispersal seed predation; Seed mass; Soil potassium; Specific leaf area; Terrestrial ecology; Terrestisk ekologi; Plant Ecology; växtekologi;

   Abstract : Linking environmental variation to population dynamics is necessary to understand and predict how the environment influences species abundances and distributions. I used demographic, environmental and trait data of forest herbs to study effects of spatial variation in environmental factors on populations as well as environmental change in terms of effects of forest succession on field layer plants. READ MORE

4. 2. Plant Population Dynamics and Biotic Interactions in two Forest Herbs

   Author : Christel Gustafsson; Martin Zobel; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Sanicula europaea; Dentaria bulbifera; Cost of reproduction; grazing; competition; dispersal limitation; patch suitability; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; ekologisk botanik; Ecological Botany;

   Abstract : In Sweden today, deciduous woodlands are often restricted to small isolated remnants of what it once was. Managing practices have changed concerning both cattle grazing and logging. Thus, dispersal, habitat requirements and their importance for forest species distributions become a relevant issue. READ MORE

5. 3. The impact of forest on pest damage, pollinators and pollination services in an Ethiopian agricultural landscape

   Author : Ulrika Samnegård; Kristoffer Hylander; Peter Hambäck; Sileshi Nemomissa; Jaboury Ghazoul; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; agroforestry; Apoidea; Coffea arabica; crop pests; Ethiopia; forest cover; landscape ecology; moist afromontane forests; pollination; species composition; tropical agriculture; Plant Ecology; växtekologi;

   Abstract : The distribution of wild biodiversity in agroecosystems affect crop performance and yield in various ways. In this thesis I have studied the impact of wild biodiversity, in terms of trees and forest structures, on crop pests, pollinators and the pollination services provided in a heterogeneous landscape in southwestern Ethiopia. READ MORE

6. 4. Forest reindeer herding A.D. 1-1800 : an archaeological and palaeoecological study in northern Sweden

   Author : Kjell-Åke Aronsson; Umeå universitet; []
   Keywords : HUMANIORA; HUMANITIES; Domestication; hearth; herding; nomadism; pastoralism; pollen analysis; reindeer; reindeer pen; Saami; settlement pattern; Renskötsel; Renskötsel-- Arkeologi -- Sverige -- 1-1800 e.Kr.; Renskötsel-- Paleoekologi -- Sverige -- 1-1800 e.Kr.;

   Abstract : This thesis deals with reindeer domestication and herding in northern Sweden. The work is focussed on the introduction of forest reindeer herding but this problem is discussed in a wider economic and cultural context.The archaeological material is considered from sourcecritical aspects. READ MORE

7. 5. Ecology of the fire-dependent forest herbs Geranium bohemicum and G. lanuginosum in Sweden

   Author : Lotta Risberg; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : Geranium bohemicum and G. lanuginosum are the only plant species in Sweden considered fire-dependent, because of their heat-triggered germination. Both are today threatened due to effective fire suppression. An aim with this study was to elucidate their population ecology. READ MORE