Sökning: "habitat variation"
Visar resultat 1 - 5 av 130 uppsatser innehållade orden habitat variation.
1. 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
2. Evaluation of River Restoration Measures: Interstitial Habitat Variables and Salmon Hatching Rates as Indicators of Success
Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning; Uppsala universitet/LimnologiSammanfattning : River ecosystems are some of the most complex ecosystems on Earth, characterized by a highly heterogenous environment which is able to sustain a disproportionally high level of biodiversity in relation to the area of which they occupy. However, anthropogenic activities are encroaching on the highly diverse riverine landscape, threatening freshwater biodiversity. LÄS MER
3. Can spawning site temperature regimes cause spawning time divergence in sympatric whitefish ecotypes? : Comparison of two hypotheses
Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : The spawning time differs between sympatric ecotypes of lake-dwelling whitefish (Coregonus lavaretus) and this temporal divergence can be linked to the type of spawning habitat used (i.e., streams, littoral or profundal). LÄS MER
4. Inveterarens underbara resa genom Jämtland - ett test av träffsäkerheten i artutbredningsmodell för norna (Calypso bulbosa) med fokus på Jämtlands län
Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : As a member state of the European union, Sweden is obligated to report the status of the species and habitats protected under the Habitats Directive every sixth year. Calypso bulbosa is one such species. LÄS MER
5. Controls over stream temperature in a northern boreal landscape
Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : With widespread increases in air temperature, it is expected that the temperature of aquatic ecosystems will also increase, especially at high latitudes. Warmer streams and rivers could have severe, direct impacts on cold-adapted aquatic fauna but may also indirectly influence species by reducing the amount of suitable habitat. LÄS MER