Sökning: "resource competition"

Visar resultat 16 - 20 av 142 avhandlingar innehållade orden resource competition.

1. 16. Soil phosphorus – a multidimensional resource that plays an important role for grassland plant species richness

   Författare :Jakob Sandberg; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; niche dimension; nutrient limitation; niche differentiation; competition; soil nitrogen; soil phosphorus; plant diversity; species richness; Grassland; land use; landscape scale;

   Sammanfattning : The semi-natural grassland habitats contain an important part of the plant diversity in Europe. Changes in farming practices have lead to drastic decreases in plant species richness. The aim of the present thesis is to contribute to the knowledge about mechanisms governing the plant species richness in grasslands with emphasis on soil nutrients. LÄS MER

3. 17. Cooperative and non-cooperative wireless access : Resource and infrastructure sharing regimes

   Författare :Johan Hultell; Jens Zander; Cristina Comaniciu; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radio resource managment competition cooperation game theory; Telecommunication; Telekommunikation;

   Sammanfattning : Future wireless networks will combine multiple radio technologies and subsystems, possibly managed by competing network providers. For such systems it may be advantageous to let the end nodes (terminals) make some or all of the resource management decisions. LÄS MER

4. 18. Marketisation of Swedish Primary Care : Patient Choice, Provider Competition and Payment Incentives

   Författare :Sofie Vengberg; Ulrika Winblad; Mio Fredriksson; Gustav Kjellsson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; patient choice; provider competition; payment incentive; reimbursement; primary care; marketisation; Sweden; Hälso- och sjukvårdsforskning; Health Care Research;

   Sammanfattning : In the last decades, market elements—such as patient choice, provider competition and payment incentives—have been introduced in Swedish primary care, the Patient Choice reform in 2010 being pivotal for the marketisation of the sector. The political intentions with the reform were to empower patients and increase provider diversity, thereby stimulating competition and improving quality and access. LÄS MER

5. 19. Adaptive evolution in multidimensional trait spaces

   Författare :Paula Vasconcelos; Claus Rüffler; Maria Servedio; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; adaptive dynamics; mutidimensional trait spaces; evolutionary dynamics; disruptive selection; resource competition; diversification;

   Sammanfattning : Negative frequency-dependent disruptive selection, which arises due to the interplay between organisms of a population and their environment, is an important element driving phenotypic diversification and even speciation. Such selection regime can result from frequency- and density-dependent interactions between the organisms and their environment, so that the fitness landscape itself changes as the population evolves. LÄS MER

7. 20. Evolving ecological communities in changing environments

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

   Sammanfattning : 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). LÄS MER