Sökning: "Plant demography"

Visar resultat 6 - 10 av 11 avhandlingar innehållade orden Plant demography.

  1. 6. Population viability analysis for plants : practical recommendations and applications

    Författare :Satu Ramula; Kari Lehtilä; Patrik Dinnétz; Esa Ranta; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; demography; matrix population models; population viability analysis; population growth rate; stochastic models; Biology; Biologi;

    Sammanfattning : Population viability analysis (PVA) is commonly used in conservation biology to predict population viability in terms of population growth rate and risk of extinction. However, large data requirements limit the use of PVA for many rare and threatened species. LÄS MER

  3. 7. Demography and Polyploidy in Capsella

    Författare :Kate St.Onge; Anna Palmé; Martin Lascoux; Ulf Lagercrantz; Richard Abbott; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Approximate Bayesian Computation; Mating system; Brassicaceae; flowering time; genetic diversity; Evolution; Biology; Biologi;

    Sammanfattning : Studies of demography and population structure give insight into important evolutionary processes such as speciation and diversification. In the present work I perform such studies in the genus Capsella, which has three species: C. grandiflora, an outcrossing diploid, C. rubella a selfing diploid, and C. LÄS MER

  4. 8. Biotic and abiotic drivers of life-history and demographic variation in boreal orchids

    Författare :Matthew R. Tye; Nina Sletvold; Yvonne Buckley; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plant demography; life-history; climate; pollination; compensation; orchids; resources; Biology with specialization in Ecological Botany; Biologi med inriktning mot ekologisk botanik;

    Sammanfattning : Environmental interactions, including both abiotic and biotic factors, are key drivers of life-history and population dynamics. Despite this, most population studies do not explicitly link variation in environmental factors and vital rates. LÄS MER

  5. 9. Spatio-temporal genetic variation in wild animal and plant populations in Sweden and its relevance for conservation genetic monitoring

    Författare :Johan Charlier; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : Human impact on the world’s ecosystems is massive, resulting in habitat destruction and fragmentation that strongly affects the future survival of non-human life forms. Typically, biodiversity loss at the genetic level is much less recognized as compared to the levels of species and ecosystems, and information on reduction of natural gene pools is frequently missing unless coupled with loss of an entire species. LÄS MER

  7. 10. Evolution of Plants : a mathematical perspective

    Författare :Magnus Lindh; Åke Brännström; Jacob Johansson; Mats G Larson; Lennart Persson; Claus Rüffler; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Evolution; plants; mathematics; optimization; optimal control; adaptive dynamics; flowering; seasons; tree crown; drought; taproot; trade-off; strategy; trait; ESS; NPP; LAI; Red Queen; Mathematics; matematik;

    Sammanfattning : The Earth harbors around 300 000 plant species. The rich and complex environment provided by plants is considered a key factor for the extraordinary diversity of the terrestrial fauna by, for example, providing food and shelter. LÄS MER