Search for dissertations about: "ecology and economy"

Showing result 1 - 5 of 46 swedish dissertations containing the words ecology and economy.

  1. 1. The nitrogen economy of mountain birch : As related to environmental conditions and genotype

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Martin Weih; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Betula pubescens ssp. czerepanovii; growth; nitrogen; subarctic; temperature; ultraviolet radiation; Ekologi; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

    Abstract : Responses of mountain birch growth to changed environmental conditions arestrongly affected by birch genotype, and nitrogen economy is a key factor influencingthe winter survival of first-year seedlings. These are some of the findings of a series ofstudies, in which growth, nitrogen economy and winter survival were analysed usingpot-grown seedlings of mountain birch (Betula pubescens ssp. READ MORE

  2. 2. Sphagnum limits Physiology, morphology and climate

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Charles Campbell; Håkan Rydin; Gustaf Granath; Sebastian Sundberg; Bengt-Gunnar Jonsson; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Sphagnum; ecology; bryophyte; winter; species distribution models; low temperature; plant structure; water economy; Biology with specialization in Ecological Botany; Biologi med inriktning mot ekologisk botanik;

    Abstract : Sphagnum is the most important plant genus in terms of terrestrial carbon cycling. It and the habitats it creates store an equivalent of ~68% of the CO2 in the atmosphere. The genus has little dispersal limitation and the mire habitats are functionally similar at global scales. READ MORE

  3. 3. Operationalizing Industrial Ecology in the Waste Sector Roles and tactics for circular value innovation

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Graham Aid; Nils Brandt; Monika Olsson; Maria Malmström; Leenard Baas; Stefan Anderberg; Mats Eklund; Anna Björklund; [2017]

    Abstract : The take-make-waste approach to resource management in human production and consumption systems is contributing to a variety of environmental and social problems worldwide. Additionally, as the world’s population and affluence increase, so do the negative impacts of poor resource management. READ MORE

  4. 4. Resource economy of carnivorous plants: Interactions between prey capture and plant performance in three subarctic Pinguicula species

    University dissertation from Plant Ecology, Ecology Building, SE-223 62 Lund

    Author : Magnus Thorén; [1998]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant ecology; income breeder; capital breeder; supplementary feeding; reproductive effort; life-history; cost of reproduction; Växtekologi;

    Abstract : In this thesis, I have studied in situ the resource economy of the three carnivorous plant species Pinguicula alpina, P. villosa and P. vulgaris in a subarctic environment. The prey capture varied among individual plants, years and species. READ MORE

  5. 5. A circular economy approach for sustainable feed in Swedish aquaculture: A nutrition and physiology perspective

    University dissertation from Göteborgs universitet

    Author : James Hinchcliffe; Göteborgs universitet.; Gothenburg University.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; aquaculture; sustainability;

    Abstract : One major challenge in aquaculture is the issue of fishmeal replacement as a protein source in aquafeeds. It is agreed that the rate of demand has now outpaced the rate of supply due to the rapid expansion of aquaculture. READ MORE