Sökning: "seasons"

Visar resultat 21 - 25 av 259 avhandlingar innehållade ordet seasons.

1. 21. Patterns of fish larvae and zooplankton distribution in mangrove-seagrass seascapes of East Africa

   Författare :Barnabas Alphonce Tarimo; Martin Gullström; Monika Winder; Mats Björk; Gunilla Rosenqvist; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fish larvae; zooplankton; population dynamics; community structure; environmental variables; seasonal variation; habitat use; mangroves; seagrass meadows; seascape connectivity; Tanzania; western Indian Ocean; marin ekologi; Marine Ecology;

   Sammanfattning : Mangroves and seagrass meadows create coastal seascapes acting as breeding and nursery grounds for many fish species in tropical areas. Despite increased awareness on the role of these coastal habitats to fish, less knowledge is given to fish larvae distribution and population dynamics, limiting the understanding of major drivers of fish population dynamics and fisheries resources management, particularly in understudied regions such as the Western Indian Ocean. LÄS MER

3. 22. Emission of methane from northern lakes and ponds

   Författare :Martin Wik; Patrick Crill; Isabelle Laurion; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lakes; ponds; water bodies; methane; fluxes; ebullition; stable isotopes; arctic; subarctic; carbon cycling; climate change; geokemi; Geochemistry;

   Sammanfattning : Northern lakes and ponds are abundant and emit large amounts of the potent climate forcer methane to the atmosphere at rates prone to change with amplified Arctic warming. In spite of being important, fluxes from surface waters are not well understood. LÄS MER

4. 23. Removal of wastewater nitrogen in a wetland filter

   Författare :Hans Bertil Wittgren; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   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. 24. Outdoor thermal comfort of residents in a warm humid climate : A study on informal settlements in Dar es Salaam, Tanzania

   Författare :Modest Maurus Baruti; Boende och bostadsutveckling; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Outdoor thermal comfort; Microclimate; Thermal perception; Urbanites; Informal settlements; Informal urban fabric; Warm humid climates; Dar es Salaam; Physiological Equivalent temperature PET ; New Standard Effective Temperature SET* ; Universal Thermal Climate Index UTCI ;

   Sammanfattning : In the informal settlements of warm humid climates, where the majority of urbanites spend most of their time outdoors, a conducive thermal environment is crucial for their social and economic well-being. The overall aim of this thesis is to increase knowledge and understanding of outdoor thermal comfort in informal settlements in the warm and humid climate of Dar es Salaam, Tanzania. LÄS MER

7. 25. Effects of enhanced ultraviolet-B radiation on subarctic ecosystems

   Författare :Carola Gehrke; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pigmentation; photosynthesis; dark respiration; shoot morphology; shoot growth; phanerogams ; species composition cryptogams; productivity; decomposition; dwarf shrubs; bryophytes; peatland ecosystem; heath ecosystem; UV-B; ozone depletion; Plant ecology; Växtekologi;

   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