Sökning: "phosphorus nitrogen"

Visar resultat 31 - 35 av 167 avhandlingar innehållade orden phosphorus nitrogen.

1. 31. Biomass, community structure and phosphorus uptake of ectomycorrhizal fungi in response to phosphorus limitation and nitrogen deposition

   Författare :Juan Pablo Almeida; MEMEG; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phosphorus and nitrogen limitation; nitrogen deposition; ectomycorrhizal fungi; community composition; apatite; Paxillus involutus; Phosphorus and nitrogen limitation; nitrogen deposition; ectomycorrhizal fungi; community composition; apatite; Paxillus involutus;

   Sammanfattning : High levels of nitrogen (N) deposition might result in a transition from N to phosphorus (P) limitation in high latitude forests. Thiscould have fundamental consequences for forest production, nutrient acquisition and nutrient leaching. LÄS MER

3. 32. Biodiversity and ecosystem functioning in created agricultural wetlands

   Författare :Geraldine Thiere; Stefan Weisner; Högskolan i Halmstad; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; constructed ponds; eutrophication abatement; biodiversity conservation; functional diversity; macroinvertebrates; plants; bacterial denitrification; watershed scale; nitrogen removal; phosphorus retention; Terrestrial; freshwater and marine ecology; Terrestrisk; limnisk och marin ekologi; watershed scale; bacterial denitrification; plants; macroinvertebrates; functional diversity; biodiversity conservation; constructed ponds; eutrophication abatement; nitrogen removal; phosphorus retention;

   Sammanfattning : This doctoral dissertation was produced in a cooperation between Halmstad University (Wetland Research Centre, School of Business and Engineering) and Lund University (Limnology & Marine Biology, Department of Ecology).Abstract . LÄS MER

4. 33. Engineered Wetlands and Reactive Bed Filters for Treatment of Landfill Leachate

   Författare :Agnieszka Kietliñska; KTH; []
   Nyckelord :Blast furnace slag; Compact constructed wetland; Metals; Nitrogen; Polonite; Sorbents;

   Sammanfattning : The main objectives of this study were to investigate (i) anovel wetland treatment technology and (ii) selected bed filtermedia for the removal of contaminants from landfill leachate. Areview of the literature concerning experiences of the use ofconstructed wetlands (CW) for the removal of nitrogen fromlandfill leachate, showed that at least three groups oftreatment systems are in practice: sub-surface flow wetlands,hybrid systems (a combination of vertical and horizontal flowwetlands) and, compact constructed wetland (CCW). LÄS MER

5. 34. The Effect of Snow on Plants and Their Interactions with Herbivores

   Författare :Mikaela Torp; Johan Olofsson; Christa Mulder; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Snow; arctic ecosystem; plant-herbivore interactions; phenology; nitrogen; phenolics; experimental manipulation; natural gradient; inter-annual variability; Biology; Biologi;

   Sammanfattning : The ongoing climate changes are predicted to accelerate fast in arctic regions with increases in both temperatures and precipitation. Although the duration of snow cover is generally expected to decrease in the future, snow depth may paradoxically increase in those areas where a large amount of the elevated precipitation will fall as snow. LÄS MER

7. 35. A passage to wastewater nutrient recovery units : Microalgal-Bacterial bioreactors

   Författare :Anbarasan Anbalagan; Jesus Zambrano; Sebastian Schwede; Carl-Fredrik Lindberg; Emma Nehrenheim; Francisco Gabriel Acién Fernández; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microalgae; Bacteria; Carbon; Nitrogen; Light; Energy- and Environmental Engineering; energi- och miljöteknik;

   Sammanfattning : In recent years, the microalgal–bacterial process has been considered to be a very attractive engineering solution for wastewater treatment. However, it has not been widely studied in the context of conventional wastewater treatment design under Swedish conditions. LÄS MER