Search for dissertations about: "bottlenecks"

Showing result 1 - 5 of 178 swedish dissertations containing the word bottlenecks.

  2. 1. Bottlenecks and blowflies : Speciation, reproduction and morphological variation in Lucilia

    Author : Ann-Britt Florin; Lisa Meffert; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Population size; speciation; Lucilia sericata; morphological variation; Lucilia illustris; bottlenecks; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

    Abstract : This thesis attempts to improve our understanding of the role of population size for the process of speciation. First, the effect of population size on speciation is studied using several meta-analyses of published laboratory experiments. READ MORE

  4. 2. Ontogenetic bottlenecks : effects on intraguild predation systems and ecosystem efficiency

    Author : Birte Reichstein; Lennart Persson; André M. De Roos; Priyanga Amarasekare; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mixed interactions; cannibalism; life-history omnivory; ontogenetic niche shift; biomass overcompensation; biomass production; ontogenetic asymmetry; indirect effects; biology; biologi; zooekologi; Animal Ecology;

    Abstract : Size-dependent differences between individuals in size-structured organisms have fundamental effect on population and community dynamics. Intraguild predation (IGP) is one specifically interesting constellation that often arises when two size-structured populations interact. READ MORE

  5. 3. District Heating Development : Prosumers and Bottlenecks

    Author : Lisa Brange; Värmeöverföring; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; District heating; Prosumers; Bottlenecks; Pressure; Differential pressure; Planning; Simulations;

    Abstract : The overarching objective of the studies in this thesis is to solve issues associated with the current district heating development in order to improve the efficiency, and thus the environmental performance, of district heating systems. More specifically, the aim is to solve issues related to prosumers and bottlenecks in district heating networks. READ MORE

  6. 4. Effects of Post-Glacial Range Expansions and Population Bottlenecks on Species Richness

    Author : Anders Ödeen; Godfrey Hewitt; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Peripatric speciation; bottlenecks; mating asymmetries; Kaneshiro model; Quaternary ice-ages; phylogeny; Motacilla; Motacilla flava; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

    Abstract : This thesis relates modern speciation theory to the effects of sudden changes in the range and size of populations. Special reference is made to the climatic oscillations during the Quaternary ice ages. READ MORE

  7. 5. Wind Power Integration in Power Systems with Transmission Bottlenecks

    Author : Julija Matevosyan; Lennart Söder; Olav Bjarte Fosso; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wind power; hydro power; transmission bottlenecks; stochastic optimization; Electric power engineering; Elkraftteknik;

    Abstract : During the last two decades, the increase in electricity demand and environmental concern resulted in fast growth of power production from renewable sources. Wind power is one of the most efficient alternatives. READ MORE