Search for dissertations about: "Ecological Effects"

Showing result 1 - 5 of 322 swedish dissertations containing the words Ecological Effects.

  1. 1. Extinctions in Ecological Communities : direct and indirect effects of perturbation on biodiversity

    Author : Alva Curtsdotter; Bo Ebenman; Peter Münger; Elisa Thébault; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : In the dawning of what may become Earth’s 6th mass extinction the topic of this thesis, understanding extinction processes and what determines the magnitude of species loss, has become only too relevant. The number of known extinctions (~850) during the last centuries translates to extinction rates elevated above the background rate, matching those of previous mass extinction events. READ MORE

  2. 2. Effects of warming on the green alga Cladophora glomerata : Ecological and genetic responses

    Author : Jenny Zie; Pauline Snoeijs; Mats Grahn; Anna Godhe; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; AFLP; Baltic Sea; Cladophora glomerata; climate change; community ecology; genome scan; global warming; selection; marin ekologi; Marine Ecology;

    Abstract : Since the beginning of the 20th century, average global surface temperature has increased ~0.7 °C and the current scenarios predict that it will continue to rise additional 2-4 °C during the 21st century. READ MORE

  3. 3. Network Based Tools and Indicators for Landscape Ecological Assessments, Planning, and Design

    Author : Andreas Zetterberg; Berit Balfors; Ulla Mörtberg; Jan Bengtsson; KTH; []
    Keywords : AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; LANTBRUKSVETENSKAPER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; AGRICULTURAL SCIENCES; Least-cost modeling; Functional connectivity; Environmental planning tool; Resilience; Spatial redundancy; Ecological integrity; Landscape Ecology; Graph Theory; Ecological Network Graphs; Biodiversity; Conservation Biology; Urban Planning; Regional Planning; EIA; SEA; Environmental Assessment; Ecological Indicator; Impact prediction; Habitat suitability; Species distribution; Urban ecology; GIS; Urbanization; Miljöbedömningsverktyg; Landskapsplanering; Resiliens; Ekologisk integritet; Landskapsekologi; Grafteori; Ekologiska nätverk; Biologisk mångfald; Bevarandebiologi; Urban planering; Regional planering; MKB; SMB; Miljöbedömning; Ekologisk indikator; Konsekvensbedömning; Habitatmodellering; GIS; Urbanisering; Nature conservation and landscape management; Natur- och landskapsvård; Environmental engineering; Miljöteknik; Terrestrial ecology; Terrestisk ekologi;

    Abstract : Land use change constitutes a primary driving force in shaping social-ecological systems world wide, and its effects reach far beyond the directly impacted areas. Graph based landscape ecological tools have become established as a promising way to efficiently explore and analyze the complex, spatial systems dynamics of ecological networks in physical landscapes. READ MORE

  4. 4. In situ remediation of contaminated sediments using thin-layer capping : efficiency in contaminant retention and ecological implications

    Author : Göran S. Samuelsson; Jonas S. Gunnarsson; Bart Koelmans; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Contaminated Sediment Remediation; Activated Carbon; Benthic Community; Ecological Effects; Stress; Resilience; Contaminant Sequestration; Capping Efficiency; Bioavailability; Bioaccumulation; Sediment-to-water fluxes; marin ekotoxikologi; Marine Ecotoxicology;

    Abstract : Hydrophobic organic contaminants (HOCs) often reside in sediments sorbed to particles, most tightly to particles with high content of organic carbon. If persistent, such pollutants can accumulate in the sediment for many years and constitute a contamination risk for sediment-living organisms and organisms at higher trophic levels, including humans. READ MORE

  5. 5. Species interactions govern evolutionary and ecological effects of population harvesting

    Author : Anna Gårdmark; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; population harvesting; species interactions; ecological community; Ekologi; Ecology; competition; predation; fisheries; spatial dynamics; maturation; population dynamics; life-history evolution; adaptation;

    Abstract : Harvesting changes population abundance and can affect adaptation of several life-history traits. Harvesting can also have indirect effects ? effects on non-target species and secondary effects on target species ? because interactions between species in a community determine the relevant ecological and evolutionary feedback environment. READ MORE