Search for dissertations about: "Göran Englund"

Showing result 1 - 5 of 10 swedish dissertations containing the words Göran Englund.

  1. 1. Competition in caddis larvae

    Author : Göran Englund; S. Kohler; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Agrypnia pagetana; Arctopsyche ladogensis; emigration; fighting behaviour; habitat selection; Hydropsyche siltalai; Hydropsychidae; immigration; predation; resource competition; sequential assessment game;

    Abstract : This thesis deals with behavioural strategies used by caddis larvae in pairwise contests and when selecting microhabitats. Effects of caddis larvae on survival and habitat selection of other insect taxa have also been studied. READ MORE

  2. 2. Anthropogenic 129I Traced in Environmental Archives by Accelerator Mass Spectrometry

    Author : Edvard Englund; Göran Possnert; Ala Aldahan; José María López-Gutiérrez; Uppsala universitet; []
    Keywords : Engineering physics; iodine-129; sediment; aerosol; reprocessing; Chernobyl; nuclear weapon; Sellafield; La Hague; accelerator mass spectrometry; AMS; Teknisk fysik;

    Abstract : Since the beginning of the nuclear era, starting during the 1940s, large amount of radioactivity has been released into the environment. This thesis deals with the temporal and spatial distribution of the anthropogenic radioisotope 129I (T1/2= 15.7 Myr) in northern Europe. READ MORE

  3. 3. Spatial heterogeneity and biotic interactions : scaling from experiments to natural systems

    Author : Ulf Bergström; Göran Englund; Erik Bonsdorff; Sebastian Diehl; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; zooekologi; Animal Ecology;

    Abstract : Much of current ecological theory stems from experimental studies. These studies have often been conducted in closed systems, at spatial scales that are much smaller than the systems of interest. READ MORE

  4. 4. Biotic resistance in freshwater fish communities

    Author : Anna Henriksson; Göran Englund; David Wardle A.; Jun Yu; Sebastian Diehl; Donald Jackson; David A. Wardle; David Wardle; Umeå universitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; biotic resistance; freshwater fish; introductions; invasions; invasion success; invasibility; invasiveness; species richness; saturation; species identity; weighted species richness;

    Abstract : Invasions of non-native species cause problems in ecosystems worldwide, and despite the extensive effort that has been put into research about invasions, we still lack a good understanding for why some, but not other, communities resist these invasions. In this doctoral thesis I test hypotheses on biotic resistance using a large dataset of more than 1000 both failed and successful introductions of freshwater fish into Swedish lakes. READ MORE

  5. 5. Island biogeography of young land uplift islands - viewed through the lens of bryophytes in a northern Swedish archipelago

    Author : Andreas Karlsson Tiselius; Mats Dynesius; Roland Jansson; Göran Englund; Joakim Hjältén; Tord Snäll; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; functional data analysis; metacommunity; isolation; mosses; liverworts; sporophyte production; dispersal-establishment trade-off; ekologisk botanik; Ecological Botany; Conservation Biology; naturvårdsbiologi; Statistics; statistik;

    Abstract : Increasing habitat fragmentation and rapid global warming is changing the conditions for species populations and ecological communities around the world. This presents challenges for the maintenance of biodiversity and a dominant paradigm for conservation in fragmented habitats is given by island biogeography and metapopulation (or metacommunity) ecology. READ MORE