Sökning: "growing seasons"
Visar resultat 1 - 5 av 44 avhandlingar innehållade orden growing seasons.
1. Avian thermoregulation across age and seasons
Sammanfattning : Animals constantly need to relate to prevailing environmental conditions and regulate their body temperature accordingly. Body temperature regulation in birds and mammals is inherently linked to energy expenditure and, thus, thermoregulation is a physiological mechanism that could trade-off with other costly processes, with potential long-term fitness consequences. LÄS MER
2. Impact of school outdoor environment upon pupils' physical activity and sun exposure across ages and seasons
Sammanfattning : Background and aims: Among children, the lack of physical activity (PA) is widespread in developed countries. Further, the majority of all skin cancers depend on an overexposure to solar ultraviolet radiation (UVR) in early life. LÄS MER
3. Adapting Scots pine Regeneration to the Changing Climate : An investigation of the effects of seed coating, arginine addition, and planting position
Sammanfattning : In Sweden, new forest stands have long been artificially regenerated using conifer seedlings. While standardized and widely adopted, this approach may need to be further adapted to the predicted increases in variations in the weather, such as extended periods of drought. LÄS MER
4. Removal of wastewater nitrogen in a wetland filter
Sammanfattning : An artificial wetland system, designed to achieve year-round wastewater treatment concomitantly with nutrient recycling, was studied for three years. As part of a joint research project, this thesis focuses on nitrogen transformations and nitrogen removal capacity. LÄS MER
5. Effects of enhanced ultraviolet-B radiation on subarctic ecosystems
Sammanfattning : Biologically harmful ultraviolet-B radiation (UV-B, 280-320 nm) is increasing at the Earth´s surface owing to stratospheric ozone depletion. This is of global concern due to potential impacts of enhanced UV-B radiation on the biosphere. LÄS MER