Search for dissertations about: "natural population change"

Showing result 1 - 5 of 302 swedish dissertations containing the words natural population change.

  2. 1. Fish population responses to climate change : Causes and consequences

    Author : Matilda L. Andersson; Peter Eklöv; Brian Hayden; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; browning; climate change; DOC; intraspecific variation; metabolism; resource use; warming;

    Abstract : Lake environments are heterogeneous, and animals show a variety of adaptations to deal with this heterogeneity. Fish often show intraspecific variation in diet, metabolism, and behavior, corresponding to their habitat use. READ MORE

  4. 2. Climate change time machine : Adaptation to 30 years of warming in the Baltic Sea

    Author : Friederike Ermold; Anssi Laurila; Jukka Jokela; Kerstin Johannesson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; climate change; thermal adaptation; evolution; Baltic Sea; Biotest Basin; ecological interactions; biological invasions; phenotypic plasticity; Biologi med inriktning mot populationsbiologi; Biology with specialization in Population Biology;

    Abstract : Earth mean surface temperature has increased by 1 °C since the industrial revolution, and this has already had considerable effects on animal and plant species. Ecological responses to the warming climate – often facilitated via phenotypic plasticity – are ubiquitous. READ MORE

  5. 3. Coping with environmental change : Lessons from isotope studies in a sentinel species

    Author : Matias Ledesma; Agnes Karlson; Marleen De Troch; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; stable isotope; compound-specific nitrogen stable isotope analysis; trophic niche; harmful algae blooms; contaminants; stress; reproductive success; environmental change; Baltic Sea; marin ekologi; Marine Ecology;

    Abstract : Adaptive evolution and phenotypic plasticity are two key mechanisms by which natural populations avoid extinction in the face of environmental change. Evolutionary young systems, such as the Baltic Sea with low species diversity and steep environmental gradients, are good models for studying how wild populations cope with environmental changes, such as climate-induced alterations in food supply and exposure to environmental contaminants. READ MORE

  6. 4. Population genetic history and patterns of admixture : Examples from northeastern and southern Africa

    Author : Nina Hollfelder; Mattias Jakobsson; Michele Ramsay; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; population structure; genetic admixture; genomic variation; Africa; population genomics; lactase persistence; sex-biased admixture; human evolutionary genetics; Biology with specialization in Evolutionary Organismal Biology; Biologi med inriktning mot evolutionär organismbiologi;

    Abstract : The origin of humans lies in Africa, as has been shown by archaeology, paleontology and genetics. Here, we can find the largest genetic diversity and the deepest split among human populations. African genetic diversity has been shaped by a long and complex history. READ MORE

  7. 5. Land Use Change in Space and Time : implications for plant species conservation in semi-natural grasslands

    Author : Regina Lindborg; Ove Eriksson; Johan Ehrlén; Thomas Elmqvist; Markus Fischer; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; diversity; management; restoration; landscape; history; Population viability analysis; seed-sowing; Primula farinosa; Campanula rotundifolia; grazing; fragmentation; extinction risk; Biology; Biologi;

    Abstract : Land use change has during the last century altered the traditional rural landscape in Sweden, resulting in a major decline in species diversity. Traditional small-scale farming, with a remarkably high small-scale species richness, has changed in favour of rationalized agriculture, and many semi-natural grasslands, i.e. READ MORE