Essays about: "pollen limitation"

Found 5 essays containing the words pollen limitation.

  1. 1. The bzzzt of frirends. Interspecific competition in Arctic plants for pollination services.

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Author : Malin Olsson; [2023-06-27]
    Keywords : the Arctic; pollinator networks; competition; autonomous selfing; Arktis; pollinationsnätverk; konkurrens; autonom självpollinering;

    Abstract : The Arctic has a harsh environment that is challenging for the flora and fauna that inhabits the region. The ruling abiotic factors of the region results is a low species richness that creates a potential challenge for the region’s plant species. READ MORE

  3. 2. Investigation of pollen limitation, inbreeding and outbreeding depression and heterosis in Euphrasia stricta var. suecica on Gotland

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Emelie Nilsson; [2017]
    Keywords : Pollen limitation; inbreeding depression; outbreeding depression; heterosis; Euphrasia stricta var. suecica; selfing; conservation;

    Abstract : Habitat fragmentation is one of the main threats to semi-natural grasslands all over Europe, causing reductions in both numbers of populations and numbers of individuals withinpopulations. Small isolated populations are particularly vulnerable to fluctuations that reducespopulation size and could lead to loss of genetic variation due to inbreeding depression, orfixation of harmful alleles due to genetic drift. READ MORE

  4. 3. Pollen limitation in the city: Measuring floral traits and pollination services in urban Chamerion angustifolium

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Anna Minnefors; [2016]
    Keywords : ;

    Abstract : Urbanization causes large environmental changes that can impact the organisms living within urban environments. Plants and pollinators can be found along the gradient from urban to rural areas and their mutual dependence may make them vulnerable to urbanization. READ MORE

  5. 4. Herbivores, pollinators and selection on flowering time in tetraploid and octoploid Cardamine pratensis

    University essay from Stockholms universitet/Institutionen för ekologi, miljö och botanik

    Author : Elsa Fogelström; [2013]
    Keywords : Cardamine; herbivory; herbivore mediated selection; pollination; pollen limitation; polyploidy; selection; flowering phenology;

    Abstract : Repeated polyploidization events are thought to be among the most important causes of sympatric speciation throughout evolutionary time. Changes in phenology and trait expressions that arise in polyploids have been shown to affect plant interactions with insect herbivores and pollinators. READ MORE

  6. 5. Pollination failure in traditionally managed hay meadows of low quality : Comparing two different pollination strategies

    University essay from Växtekologi och evolution; Institutionen för biologisk grundutbildning

    Author : Tobias Nilsson; [2012]
    Keywords : Pollination; pollen limitation; hay meadow; habitat fragmentation; seed set; habitat quality; pollination strategies;

    Abstract : Today traditionally managed wooded hay meadows only exist in small fractions of their former distributions. Because of the fragmentation and degeneration of hay meadows and the fact that pollinating insect diversity and abundance also are declining, pollination services in these habitats requires attention. READ MORE