Sökning: "life-strategies"

Visar resultat 6 - 10 av 13 avhandlingar innehållade ordet life-strategies.

1. 6. Green roof vegetation and storm water runoff quantity - Effects of plant traits, diversity and life strategies

   Författare :Joel Lönnqvist; Godecke-Tobias Blecken; Maria Viklander; Ishi Buffam; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering; Centrumbildning - Centrum för dagvattenhantering DRIZZLE ; Centre - Centre for Stormwater Management DRIZZLE ;

   Sammanfattning : Green roofs have gained recognition and popularity globally for their potential to help mitigate the negative impacts of urbanization such as habitat loss and disruption of the water cycle caused by increased impervious surfaces. However, there is still a need to enhance our understanding of green roof vegetation dynamics and how they affect plant water use and hydrological function under varying environmental conditions. LÄS MER

3. 7. Development of photoreceptor organs in teleosts, Molecular and immunocytochemical studies

   Författare :Johan Forsell; Tumörmikromiljö; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fish; opsin; extraretinal; retina; Development; pineal organ; Zoology; Zoologi;

   Sammanfattning : Many vertebrate animals are known to have multiple sites for photoreception that are not involved in vision. Extraretinal photoreception is indicated to play a crucial role in early development, physiology and behavior, as well as in later biological processes. LÄS MER

4. 8. Future stratospheric ozone depletion will affect a subarctic dwarf shrub ecosystem

   Författare :Ulf Johanson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Vaccinium; UVB; subarctic; shoot growth; ozone depletion; leaf thickness; irradiation system; heath ecosystem; Empetrum; dwarf shrubs; Calamagrostis; decomposition; Physiological biophysics; Växtfysiologi;

   Sammanfattning : The stratospheric ozone depletion and the concomitant increase in ultraviolet-B (UV-B, 280-320 nm) radiation is of global concern due to the effects of UV-B on living organisms. To investigate the effects of increased levels of UV-B, a field irradiation system was established at a subarctic dwarf shrub heath in Northern Sweden (68 °N). LÄS MER

5. 9. Ecology of lichens in boreal coniferous forests with reference to spatial and temporal patterns

   Författare :Per-Anders Esseen; Lars Ericson; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lichens; epiphytes; Alectoria; Bryoria; Cladonia; Usnea; Picea abies; Pinus sylvestris; dispersal; litterfall; succession; diversity; spatial patterns;

   Sammanfattning : The thesis deals with the ecology of lichens in two contrasting types of forest, epiphytic lichens in old Picea abies forest of the fi re-refugia type and epigeic as well as epixylic lichens in a successional sequence of fire- susceptible Pinus sylvestris forests. Results in five separate papers form the basis for a discussion of general patterns of dispersal, succession and life strategies in lichens. LÄS MER

7. 10. Domestication and early experiences in chickens : Behavior, stress and gene expression

   Författare :Pia Katrine Løtvedt; Per Jensen; Jordi Altimiras; Emma Brunberg; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : A number of animal species have undergone domestication, the process of becoming adapted to living in captivity and in proximity to humans. Common for these species is that they have all developed certain traits, including changes to coat color, body size and level of fearfulness. This has been termed the domestic phenotype. LÄS MER