Sökning: "plant quality"

Visar resultat 1 - 5 av 245 avhandlingar innehållade orden plant quality.

  1. 1. Herbivores influence nutrient cycling and plant nutrient uptake insights from tundra ecosystems

    Detta är en avhandling från Umeå : Umeå University

    Författare :Hélène Barthelemy; Umeå universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Reindeer grazing; large herbivores; nutrient cycling; plant nutrient uptake; soil nutrient availability; arctic plant ecology; soil microbial communities; 15N stable isotopes; plant-soil interactions; plant quality; dung and urine.; Environmental Science; miljövetenskap; biology; biologi;

    Sammanfattning : Reindeer appear to have strong positive effects on plant productivity and nutrient cycling in strongly nutrient-limited ecosystems. While the direct effects of grazing on vegetation composition have been intensively studied, much less is known about the indirect effect of grazing on plant-soil interactions. LÄS MER

  2. 2. Information Flow and Product Quality in Human Based Assembly

    Detta är en avhandling från Mechanical and Manufacturing Engineering, Loughborough University

    Författare :Gunnar Bäckstrand; Högskolan i Skövde.; Högskolan i Skövde.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; attention; information system; human factors; manual assembly; quality; productivity; Teknik; Technology;

    Sammanfattning : Information is an important part of the manual assembly process. Information provides the user with the means to fulfil assembly tasks so that the right quality as well as high productivity are accomplished. LÄS MER

  3. 3. PLANT-BACTERIAL AND PLANT-FUNGAL COMPETITION FOR NITROGEN AND PHOSPHORUS

    Detta är en avhandling från Katarina Månsson, Department of Ecology (Plant Ecology and Systematics), Ecology Building, Lund University, 223 62 Lund

    Författare :Katarina Månsson; Lund University.; Lunds universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Växtekologi; Amino acid; 15N; Soil C:N ratio; Plant ecology; Soil drying-rewetting;

    Sammanfattning : Competition between and within species has been one of the most studied concepts in ecology. In this thesis the aim was to test the idea of plant-microbial competition for N and, by studying this interaction, to gain a better understanding of different N processes in soil. LÄS MER

  4. 4. Intramolecular isotope analysis reveals plant ecophysiological signals covering multiple timescales

    Detta är en avhandling från Umeå : Umeå Universitet

    Författare :Thomas Wieloch; Umeå universitet.; [2019]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NMR spectroscopy; tree ring; isotope ratio; isotope effect; intramolecular 13C 12C signal; carbon allocation; acclimation; plant performance; climate reconstruction; plant ecophysiology;

    Sammanfattning : Our societies' wellbeing relies on stable and healthy environments. However, our current lifestyles, growth-oriented economic policies and the population explosion are leading to potentially catastrophic degradation of ecosystems and progressive disruption of food chains. LÄS MER

  5. 5. Remote sensing in optically complex waters water quality assessment using MERIS data

    Detta är en avhandling från Stockholm : Department of Ecology, Environment and Plant Sciences, Stockholm University

    Författare :José M. Beltrán-Abaunza; Stockholms universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ocean Colour; MERIS; Baltic Sea; Bio-optics; water quality; Chlorophyll; Turbidity; SPM; Himmerfjärden; Remote Sensing; Marine Ecology; marin ekologi;

    Sammanfattning : This PhD study focusses on the use of MEdium Resolution Imaging Spectrometer (MERIS) data for reliable and quantitative water-quality assessment of optically-complex waters (lake, brackish and coastal waters). The thesis is divided into two parts: A. LÄS MER