Search for dissertations about: "Ecological factors"

Showing result 1 - 5 of 189 swedish dissertations containing the words Ecological factors.

  1. 1. Ischemic heart disease in Kiruna risk factors and sequelae

    University dissertation from Umeå : Umeå universitet

    Author : Torbjörn Messner; Umeå universitet.; [1996]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ischemic heart disease; risk factors; alcohol; acetylsalicylic acid; lipids; fatty acids; diet; psychosocial risk factors; migration; smoking; mortality; diabetes mellitus; family history; heart failure;

    Abstract : Kiruna, a Swedish community situated 300 km north of the Arctic Circle, has a very high mortality in ischemic heart disease (IHD). Acase-control study was undertaken to find out if the risk factors for IHD or their impact differed from those in other populations. READ MORE

  2. 2. Making complex commons work : identifying critical social-ecological factors and mechanisms for sustainable ecosystem management

    University dissertation from Stockholm : Stockholm Resilience Centre, Stockholm University

    Author : Caroline Schill; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Agent-based modelling; Behavioural experiments; Collective action; Common-pool resources; Cooperation; Ecological complexity; Knowledge sharing; Regime shifts; Social-ecological systems; Sustainable management; Thresholds; Uncertainty; vetenskap om hållbar utveckling; Sustainability Science;

    Abstract : Collective action holds the key to many sustainability challenges, from local to global scales. Whether it is to manage community-based fisheries or take action against climate change or biodiversity loss – the question on how to overcome the conflict between individual and collective interests (i.e. READ MORE

  3. 3. Human Behaviour in Social-Ecological Systems Insights from economic experiments and agent-based modelling

    University dissertation from Stockholm : Stockholm Resilience Centre, Stockholm University

    Author : Caroline Schill; Stockholms universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Human behaviour; Common-pool resources; Ecological complexity; Collective action; Sustainable resource use; Regime shifts; Thresholds; Uncertainty; Communication; Knowledge-sharing; Economic experiments; Laboratory and field experiments; Agent-based modelling; Complex adaptive systems; Social-ecological systems; vetenskap om hållbar utveckling; Sustainability Science;

    Abstract : Progress towards sustainability requires changes in our individual and collective behaviour. Yet, our fundamental understanding of behaviour in relation to environmental change remains severely limited. READ MORE

  4. 4. Macroalgae in tropical seascapes regulating factors and functions in the coastal ecosystem

    University dissertation from Stockholm : Department of Systems Ecology, Stockholm University

    Author : Gustaf Lilliesköld Sjöö; Stockholms universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Macroalgae; Coral reefs; Nutrients; Herbivory; Ecological functions; East Africa; Regulating factors; Anthropogenic influence; Seaweed farming; Bioindicator; Marine Ecotoxicology; marin ekotoxikologi;

    Abstract : Although macroalgae usually are inconspicuous on pristine coral reefs, they often thrive on reefs that are subjected to various types of anthropogenic disturbance. This thesis consists of five papers and investigates how biomass and composition of macroalgal communities on coral reefs are affected by regulating factors, such as nutrient availability, herbivory, substrate availability and hydrodynamic forces. READ MORE

  5. 5. Bird orientation: external cues and ecological factors

    University dissertation from Johan Bäckman, Animal ecology, Ecology Building, SE-22362 Lund, Sweden

    Author : Johan Bäckman; Lunds universitet.; Lund University.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; tracking radar; Emlen funnel.; Animal ecology; Djurekologi; oscillatory orientation; roosting flight; scatter; concentration; heading; cue calibration; light dependent; magnetoreception; subcutaneous fat stores; body condition; energetics; geomagnetic field; visual cues; orientation; birds; migration;

    Abstract : Popular Abstract in Swedish Ett stort antal fåglar flyttar vår och höst mellan sina häckningsplatser hos oss i norr till “övervintringsområden”. Många flyttar över stora avstånd, till södra Europa eller till Afrika. Ofta är flyttfåglarnas mål väl definierat, det händer att en fågel häckar på exakt samma plats år efter år. READ MORE