Search for dissertations about: "nutrient limitation"

Showing result 21 - 25 of 71 swedish dissertations containing the words nutrient limitation.

  2. 21. Ecological studies on nitrogen fixing blue-green algae and on nutrient limitation of phytoplankton in the Baltic Sea

    Author : Kerstin Wallström; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  4. 22. Long-lasting ecological legacies of reindeer on tundra vegetation

    Author : Dagmar D. Egelkraut; Johan Olofsson; Bruce Forbes; Hans Tømmervik; René van der Wal; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Alternative stable state; Herbivory; Historical contingency; Nutrient cycling; Plant-herbivore interactions; Plant-soil feedbacks; Rangifer tarandus; Reindeer herding; Traditional land use; Tundra vegetation;

    Abstract : Reindeer can have strong effects on the plant species composition and functioning of tundra ecosystems, and often promote a transition towards a graminoid-dominated vegetation type. As a result, they influence many ecological processes, such as nutrient dynamics, soil biotic composition and functioning, and carbon storage. READ MORE

  5. 23. The temperature-limited fed-batch technique for control of Escherichia coli cultures

    Author : Marie Svensson; Sven-Olof Enfors; John Villadsen; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Endotoxin; Escherichia coli; fed-batch technique; glucose-limitation; mathematical model; Bioengineering; Bioteknik;

    Abstract : The objective of this study was to investigate the physiology and productivity in Escherichia colicultures with emphasis on the temperature-limited fed-batch (TLFB) culture. The TLFB techniquecontrols the oxygen consumption rate of the growing culture by a gradually declining temperaturefrom 37-35 °C down to 20-18 °C. READ MORE

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

    Author : Juan Pablo Almeida; MEMEG; []
    Keywords : 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;

    Abstract : 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. READ MORE

  7. 25. Plant-based biogas production for improved nutrient management of beetroot in stockless organic farming

    Author : Anita Gunnarsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Transition from a nutrient management system based on green manure (GrM system) to one based on biodigested plant material produced within the crop rotation (BG system) was investigated in crop sequences including clover-grass, beetroot and cereals. The overall hypothesis was that transition would improve nitrogen (N) availability. READ MORE