Sökning: "vital rates"

Visar resultat 6 - 10 av 100 avhandlingar innehållade orden vital rates.

  1. 6. Dynamics of seashore populations of Agrostis stolonifera, Festuca rubra and Poa irrigata

    Författare :Guðrún Á. Jónsdóttir; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Populationsekologi;

    Sammanfattning : The dynamics of tillers of natural populations of three cohabiting perennial grass species Agrostis stolonifera, Festuca rubra and Poa irrigata were studied for five years in a Baltic seashore meadow. A demographic approach based on numerical changes over time was used. LÄS MER

  3. 7. Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos

    Författare :Gunnar Gunnarsson; Kjell Sjöberg; Johan Elmberg; Per Lundberg; Robert Clark; Högskolan Kristianstad; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; broods; dabbling ducks; density dependence; ducklings; experiments; models; mortality; nest predation; regulation; survival; Terrestrial ecology; Terrestrisk ekologi;

    Sammanfattning : Measuring and assessing vital rates such as births and deaths are prerequisites for understanding population dynamics. Vital rates may be affected by the density of individuals, even though the importance of density dependence on population dynamics has been debated for a long time. LÄS MER

  4. 8. Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos

    Författare :Gunnar Gunnarsson; Kjell Sjöberg; Johan Elmberg; Per Lundberg; Kristianstad University; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Measuring and assessing vital rates such as births and deaths are prerequisites for understanding population dynamics. Vital rates may be affected by the density of individuals, even though the importance of density dependence on population dynamics has been debated for a long time. LÄS MER

  5. 9. Critical care in low resource settings

    Författare :Tim Baker; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Critical Care;

    Sammanfattning : Background: Critical care is the care of patients with immediately life-threatening disease or injury. The substantial global burden of critical illness is especially high in low resource settings. There is a striking lack of knowledge about the quality of critical care in such settings and about how to improve care. LÄS MER

  7. 10. Life histories and population dynamics

    Författare :Annie Jonsson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : During the last decades there has been a growing interest and attention to random variation in population densities and their causes. It has been shown that even in constant environments (deterministic population growth) the dynamics of populations can display random like behaviour depending on parameter values. LÄS MER