Search for dissertations about: "Ecological adaptation"

Showing result 11 - 15 of 92 swedish dissertations containing the words Ecological adaptation.

  2. 11. Macroalgae in the Baltic Sea : responses to low salinity and nutrient enrichment in Ceramium and Fucus

    Author : Lena Bergström; Lars Ericson; Lena Kautsky; Erik Bonsdorff; Christine A Maggs; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; adaptation; asexual reproduction; Baltic Sea; Gulf of Bothnia; salinity; macroalgae; nutrients; sexual reproduction; stress; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

    Abstract : The brackish Baltic Sea is a marginal environment for both marine and freshwater species. The rate of ecological differentiation is presumably high due to strong selection pressure from a gradient of decreasing salinity that has been present in its current state for only about 3 000 years. READ MORE

  4. 12. Evolving ecological communities in changing environments

    Author : Jacob Johansson; Evolutionär ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; adaptive dynamics; competition; community evolution; ecological communities; environmental change; evolutionary branching;

    Abstract : This thesis consists of theoretical studies of the evolutionary consequences of environmental change in ecological communities. Paper I and II are concerned with the origin of diversity, i.e. how a single lineage can split into two, under the influence of selection induced by competitive interactions (evolutionary branching). READ MORE

  5. 13. People, Climate, and Inclusive Infrastructure : A thesis on design and planning in underserved neighbourhoods

    Author : Joseph Mulligan; Mattias Höjer; David Nilsson; Edgar Pieterse; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Socio-ecological systems; climate change; infrastructure design and planning; participation; adaptation; co-design; resilience; urban transition; flood risk management; transdisciplinary research; Kibera; Nairobi; Kenya; sub-Saharan Africa.; Strategier för hållbar utveckling; Strategies for sustainable development;

    Abstract : This thesis is concerned with the processes of design and planning of infrastructure in rapidly urbanising cities that can lead to a more just and sustainable trajectory of urban development in the context of a changing climate. The thesis draws on case studies, panel surveys, interviews, and participant-observation of both top-down and bottom-up planning processes for infrastructure development and flood risk management in the context of urban informal areas, with a particular focus on the large informal neighbourhood of Kibera in central Nairobi, Kenya. READ MORE

  6. 14. Phenotypic and genetic adaptations to a new host plant : Ecological divergence of a specialist insect

    Author : Kalle Nilsson; anpassning och samevolution Artbildning; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ecological speciation; persistence of ecological adaptations; host plant shift; genomic landscape; genomic inversion; parallelism; evolvability; reproductive barriers; Tephritis;

    Abstract : Divergent ecological adaptation resulting from selection is common, but how often it results in differentiation that can last in the face of gene flow is debated. Reproductive barriers persistent to stochastic environmental change are key for species to form. READ MORE

  7. 15. Ecological and Evolutionary Consequences of Herbivory in the Perennial Herb Lythrum salicaria

    Author : Lina Lehndal; Jon Ågren; Peter Hambäck; Marc Johnson; Uppsala universitet; []
    Keywords : Disturbance gradient; Female reproductive success; Galerucella calmariensis; Galerucella pusilla; Herbivore removal; Latitudinal gradient; Local adaptation; Nanophyes marmoratus; Plant-herbivore interactions; Plant size; Resistance to herbivory; Tolerance to damage; Biology with specialization in Ecological Botany; Biologi med inriktning mot ekologisk botanik;

    Abstract : In this thesis, I combined field, common-garden and greenhouse experiments to examine the ecological and evolutionary consequences of plant-herbivore interactions in the perennial herb Lythrum salicaria. More specifically I examined (1) whether resistance and tolerance to damage from herbivores vary with latitude and are positively related to the intensity of herbivory in natural populations, (2) whether effects of herbivory on plant fitness vary with latitude, (3) whether populations are locally adapted and whether herbivory influences the relative fitness of populations, and (4) whether the intensity and effects of insect herbivory on reproductive output vary locally along a disturbance gradient and are associated with differences in plant resistance. READ MORE