My work has centered on genetic variation and how it can be used to analyse natural populations and what is its role for individual fitness and evolution. Delineation of population, subspecies and species is of importance for studies on biodiversity, ecology and evolution, and a proper management of natural resources. Analyses of genetic variation and morphological variation are used to identify these units, including assessment of population structure, phylogeography, phylogeny and hybridization. This work has included various species such as marine fishes, birds, marine and freshwater invertebates. The impact of genetic variation and inbreeding for individual fitness and evolution have been studied using both empirical data and modelling.
Currently there are couple of projects in my lab: 1) Population biology of the groundwater amphipod Crangonyx islandicus and analyses of coexisting species in the Icelandic groundwater using both RadSeq and eDNA analyses. This is a subject of two PhD projects in collaboration with Professor Bjarni K. Kristjánsson at Holar University, and one post doctorate researcher. 2) Phylogeographic origin and population structure of shrimps from Bangladesh - one PhD project, supported by the United Nations University. 3) Population differentiation and morphological variation in common whelk - one PhD project in collaboration with Zophonías Jónsson and Erla B. Örnolfsdóttir Holar University. 4) Historic changes in Atlantic cod. A project led by Guðbjörg Ásta Ólafsdóttir, Bolungarvík in collaboration with Einar G. Nielsen DTU, Silkeborg. 5) Population biology and inbreeding of the White tailed eagle.
Recent work includes analysis of otolith variation in Atlantic herring, colonization of Atlantic rock crab, population structure and phylogeny of groundwater amphipods, population structure of shrimps from Sri Lanka, phylogeography of two caddisflies and Arctic fox population dynamics.