Essays about: "genetic adaptation"

Showing result 1 - 5 of 20 essays containing the words genetic adaptation.

  1. 1. Biodiversity in assisted migration trials : a study comparing the arthropod diversity between different populations of cottonwood (Populus Fremontii) translocated to new areas

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Maria Noro Larsson; [2018]
    Keywords : assisted migration; biodiversity conservation; arthropods; climate change;

    Abstract : This study aims at investigating how diversity and community structure of arthropods are affected by assisted migration of foundation species. This is proposed to counter biodiversity loss in the tracks of climate change. By focusing on foundation species, a larger quantity of biodiversity could be protected. READ MORE

  2. 2. The Basis of Reproductive Isolation Between Ecologically Divergent Host Plant Races

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Emma Kärrnäs; [2018]
    Keywords : Biology and Life Sciences;

    Abstract : Insects and their host plants constitute a considerable proportion of the diversity on earth, and host shifts hence provide excellent study systems to study the process that drive diversification. In this study, I address what the mechanism to achieve assortative mating is in two host races using different host plants to increase our understanding of how reproductive isolation can arise in the face of ecological specialization. READ MORE

  3. 3. 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. 4. An investigation into trait differentiation within and between two closely related Silene species.

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Daniel Connaghan; [2017]
    Keywords : Silene; speciation; ecological differentiation;

    Abstract : Ecological differentiation and adaptation are processes that can drive divergence and speciation. Measuring ecologically revenant traits can help to identify possible targets of natural selection that may have mediated ecological differentiation. READ MORE

  5. 5. Clines resulting from selection-dispersal balance in the presence of multiple environmental changes

    University essay from Chalmers tekniska högskola/Institutionen för fysik (Chalmers)

    Author : Oskar Fridell; [2017]
    Keywords : cline; Littorina saxatilis; hybrid zone; genetic drift; bimodality.;

    Abstract : A hybrid zone is a spatial area in which two genetically and phenotypically differentpopulations of the same species (so called divergent ecotypes) meet and produceviable and fertile offspring. Hybrid zones are commonly observed in nature. Examplesinclude hybrid zones found in the sea snail Littorina saxatilis on the SwedishWest coast. READ MORE