Sökning: "Plant species diversity"
Visar resultat 1 - 5 av 180 uppsatser innehållade orden Plant species diversity.
1. Betesrestaureringens effekter på växtartrikedom och biologisk mångfald : -restaurering av betesmark på Hallands Väderö
Kandidat-uppsats, Karlstads universitet/Avdelningen för biologi; Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)Sammanfattning : Abstract Pasture is a very species-rich but threatened nature type, and compared to 200 years ago, only five percent of natural pastures remain in Sweden. One way to try to save the biological diversity that pastures harbor is to restore overgrown land by clearing and reintroducing grazing animals. LÄS MER
2. Riparian plant biodiversity and community composition of ditches and straightened streams : identifying key environmental drivers in a boreal forest setting
Master-uppsats, SLU/Dept. of Forest Ecology and ManagementSammanfattning : Modified ecosystems are typically seen as degraded and having no ecological value. In many cases, the modification of the ecosystem was done more than 100 years ago and may have had time to recover and become a refugia for species that were once more common in the landscape. LÄS MER
3. Non-native plants in mountain ecosystems. An exploration of plant diversity and its response to road disturbance and alien invasion.
Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskapSammanfattning : Understanding patterns of invasive plants becomes ever more important as anthropogenic presence continues to facilitate their spread. In mountainous landscapes, cases of establishment by nonnative species have become frequent, despite the environmentally unfavorable conditions for plants less adapted to the harsh climate. LÄS MER
4. The Valeriana officinalis aggregate in Sweden. A preliminary study.
Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskapSammanfattning : Common valerian (Valeriana officinalis L.) is a species of flowering plants native to Europe, the roots of which have been used in folk medicine for centuries. But due to high diversity in morphology and chromosome numbers, different populations in V. LÄS MER
5. Arbete med biologisk mångfald på Kungliga Djurgården : med fokus på rödlistade och invasiva arter
Kandidat-uppsats, SLU/Dept. of EcologySammanfattning : Fler och fler arter hotas av förändrad markanvändning, klimatförändringar, spridning av invasiva arter m.m. För att motverka den negativa utvecklingen har urbana grönområden blivit allt viktigare. LÄS MER