Sökning: "Time lags"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden Time lags.

  1. 1. Environmental Assessment of Emerging Routes to Biomass Based Chemicals The Case of Ethylene

    Författare :Christin Liptow; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fermentation; sugarcane; time lags; gasification; biomass based chemicals; wood; land use; life cycle assessment; ethylene; LCA;

    Sammanfattning : The production of bulk chemicals from biomass instead of fossil resources is perceived as one promising option to decrease society's environmental impact. However, though considerable research and development efforts aim at such production, it might take several more years before biomass based bulk chemicals are fully commercialized. LÄS MER

  3. 2. Responses of boreal forest understory plant communities to climate and forestry

    Författare :Ditte Marie Christiansen; Kristoffer Hylander; Johan Ehrlén; Signe Normand; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boreal forests; bryophytes; climate; climate change; community temperature index; demography; forest management; microclimate; plants; species interactions; species distributions; time-lags; transplant experiment; understory communities; Ecology and Evolution; ekologi och evolution;

    Sammanfattning : A warming climate is altering species distributions and community compositions. To understand and predict changes in species distributions to climate change, we often use species occurrences together with large-scale regional climate data. This can be problematic for several reasons. LÄS MER

  4. 3. Land Use Change in Space and Time : implications for plant species conservation in semi-natural grasslands

    Författare :Regina Lindborg; Ove Eriksson; Johan Ehrlén; Thomas Elmqvist; Markus Fischer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diversity; management; restoration; landscape; history; Population viability analysis; seed-sowing; Primula farinosa; Campanula rotundifolia; grazing; fragmentation; extinction risk; Biology; Biologi;

    Sammanfattning : Land use change has during the last century altered the traditional rural landscape in Sweden, resulting in a major decline in species diversity. Traditional small-scale farming, with a remarkably high small-scale species richness, has changed in favour of rationalized agriculture, and many semi-natural grasslands, i.e. LÄS MER

  5. 4. Towards Climate Based Early Warning and Response Systems for Malaria

    Författare :Maquins Odhiambo Sewe; Joacim Rocklöv; Clas Ahlm; Yesim Tozan; Madeleine Thomson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Malaria; Mosquito; Lead time; Early Warnings; Forecasts; Economic Evaluation; Rainfall; KEMRI CDC HDSS; Kenya; Temperature; LST; NDVI; Climate; HDSS; GAM; GAMBOOST; DLNM; Remote Sensing; Net Benefit; Cost-Effectiveness; Boosting Regression; Weather; Public Health; Infectious Diseases; folkhälsa; Public health; Epidemiology; epidemiologi;

    Sammanfattning : Background: Great strides have been made in combating malaria, however, the indicators in sub Saharan Africa still do not show promise for elimination in the near future as malaria infections still result in high morbidity and mortality among children. The abundance of the malaria-transmitting mosquito vectors in these regions are driven by climate suitability. LÄS MER

  7. 5. Exploring connections in social-ecological systems : The links between biodiversity, ecosystem services, and human well-being in South Africa

    Författare :Maike Hamann; Reinette (Oonsie) Biggs; Belinda Reyers; Thomas Elmqvist; Fabrice DeClerck; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; complex adaptive systems; mapping; ecosystem service bundles; multidimensional human well-being; biodiversity loss; inequality; research frameworks; interdisciplinarity; natural resource management; sustainable development; Sustainability Science; vetenskap om hållbar utveckling;

    Sammanfattning : A key challenge of the Anthropocene is to advance human development without undermining critical ecosystem services. Central to this challenge is a better understanding of the interactions and feedbacks between biodiversity, ecosystem services and human well-being, which interact in dynamic and complex social-ecological systems. LÄS MER