Search for dissertations about: "Adaptive landscape"

Showing result 1 - 5 of 47 swedish dissertations containing the words Adaptive landscape.

2. 1. Design and Analysis of Self-protection : Adaptive Security for Software Systems

   Author : Charilaos Skandylas; Narges Khakpour; Simin Nadjm-Tehrani; Linnéuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Security Analysis; Self-Protection; Self-adaptive Systems; Verification; Information Flow Control; Risk Assessment; Computer Science; Datavetenskap;

   Abstract : Today's software landscape features a high degree of complexity, frequent changes in requirements and stakeholder goals, and uncertainty.Uncertainty and high complexity imply a threat landscape where cybersecurity attacks are a common occurrence while their consequences are often severe. READ MORE

4. 2. Adaptive evolution in multidimensional trait spaces

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

   Abstract : 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. READ MORE

5. 3. The genomic signatures of adaptive evolution in Populus

   Author : Jing Wang; Pär Ingvarsson; Barbara Mable; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Populus; adaptive evolution; natural selection; genomic diversity and divergence; recombination; Next-generation sequencing; local adaptation;

   Abstract : Understanding the genetic basis of adaptive evolution, and how natural selection has shaped patterns of polymorphism and divergence within and between species are enduring goals of evolutionary genetics. In this thesis, I used whole genome re-sequencing data to characterize the genomic signatures of natural selection along different evolutionary timescales in three Populus species: Populus tremula, P. READ MORE

6. 4. Sexual Selection and Adaptation to Novel Environments

   Author : Ivain Martinossi-Allibert; David Berger; Göran Arnqvist; Lukas Schärer; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sexual selection; Environmental change; Sexual conflict; Environmental stress; Adaptation; Adaptive landscape; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Abstract : The work included in this thesis aims at exploring the environmental sensitivity of benefits and costs of sexual selection through a combined empirical and theoretical effort, to increase our understanding of the impact of environmental change on sexually reproducing populations.Can sexual selection promote adaptation to novel environments? Sexual selection for good genes should accelerate adaptation by granting higher reproductive success to individuals of high genetic quality. READ MORE

7. 5. Understanding the adaptive capacity of the bumblebee Bombus terrestris across native and novel environments

   Author : Cecilia Hjort; Biodiversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bumblebees; Bombus terrestris; Pollination; Introgression; Single nucleotide polymorphisms; Whole Genome Sequencing; Landscape simplification; Gene flow; Morphology; Environmental variation; Invasion; Local adaptation; Island;

   Abstract : Anthropogenic stressors such as agricultural intensification, climate change, andincreased densities of non-native managed bees used for crop pollination arecontributing to bee declines. Understanding how and why bees have responded topast environmental changes is crucial for predicting future ones and enablingmitigation to maintain the functioning of both natural and agricultural ecosystems. READ MORE