Sökning: "magne friberg"

Hittade 4 avhandlingar innehållade orden magne friberg.

  1. 1. Female choice, voltinism and ecological pleiotropy - causes and consequences of the species divergence between Leptidea sinapis and L.reali

    Författare :Magne Friberg; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  2. 2. The evolutionary ecology of niche separation : Studies on the sympatric butterflies Leptidea sinapis and Leptidea reali

    Författare :Magne Friberg; Wiklund Christer; John N. Thompson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lepidoptera; ecological character displacement; reproductive isolation; species discrimination; habitat; host plant; life history; sexual selection; female choice; Biology; Biologi; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Studies of ecology and evolution have become largely integrated, and increasing attention is paid to the role of ecology for speciation and post speciation divergence. In this thesis I have applied an in-depth approach studying the ecology of a butterfly species pair; the morphologically virtually identical sister-species, the Wood white (Leptidea sinapis) and Reál’s wood white (Leptidea reali). LÄS MER

  3. 3. Evolutionary Ecology of Floral Traits in Fragrant Orchids

    Författare :Elodie Chapurlat; Nina Sletvold; Jon Ågren; Magne Friberg; Kathleen Kay; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; agents of selection; diurnal and nocturnal pollination; divergent selection; field experiment; floral evolution; floral scent; Gymnadenia conopsea; Gymnadenia densiflora; Orchidaceae; phenotypic selection; pollinator-mediated selection; spatial variation; scent rhythm;

    Sammanfattning : Why are flowers so diverse? Much of floral evolution is thought to be driven by pollinator-mediated selection. However, the connection between macroevolutionary patterns of floral diversity and microevolutionary processes remains poorly understood. In this thesis, I have used the fragrant orchids Gymnadenia conopsea s.s. LÄS MER

  4. 4. Genomic studies of mating system variation in flowering plants

    Författare :Juanita Gutiérrez-Valencia; Tanja Slotte; Magne Friberg; Mario Vallejo-Marín; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mating system evolution; cross- and self-fertilization; distyly; supergenes; complex phenotypic polymorphism; convergent evolution; homostyly; loss-of-function mutation; intrasexual competition; pollen; purifying selection; Linum; Arabis alpina; Ecology and Evolution; ekologi och evolution;

    Sammanfattning : The striking diversity of reproductive strategies that flowering plants exhibit remains one of the most intriguing conundrums in evolutionary biology. Pollination-related traits and mating system strategies have a major impact on the processes shaping plant evolution through their effects on genetic diversity and selection. LÄS MER