Blar i forfatter "Hamilton, Charmain Danielle"

Viser treff 1-6 av 6

    • An Arctic predator–prey system in flux: climate change impacts on coastal space use by polar bears and ringed seals 

      Hamilton, Charmain Danielle; Kovacs, Kit; Ims, Rolf Anker; Aars, Jon; Lydersen, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-17)
      <p>1. Climate change is impacting different species at different rates, leading to alterations in biological interactions with ramifications for wider ecosystem functioning. Understanding these alterations can help improve predictive capacity and inform management efforts designed to mitigate against negative impacts.</p> <p>2. We investigated how the movement and space use patterns of polar bears ...

    • Challenges for ice-associated top trophic Arctic animals in a changing climate 

      Hamilton, Charmain Danielle (Doctoral thesis; Doktorgradsavhandling, 2017-02-17)
      The Arctic is currently in a rapid state of change, with temperature increases in this region being three times the rate of the global average and sea-ice extent declining rapidly. In 2006, a sudden shift in the sea-ice regime in Svalbard, Norway, occurred with the altered sea-ice conditions persisting to the present day. In order to study the impacts of the environmental changes occurring in the ...

    • Contrasting changes in space use induced by climate change in two Arctic marine mammal species 

      Hamilton, Charmain Danielle; Vacquie-Garcia, Jade; Kovacs, Kit M.; Ims, Rolf Anker; Kohler, Jack; Lydersen, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-06)
      Global warming is inducing major environmental changes in the Arctic. These changes will differentially affect species owing to differences in climate sensitivity and behavioural plasticity. Arctic endemic marine mammals are expected to be impacted significantly by ongoing changes in their key habitats owing to their long life cycles and dependence on ice. Herein, unique biotelemetry datasets for ...

    • Haul-out behaviour of Arctic ringed seals (Pusa hispida): inter-annual patterns and impacts of current environmental change 

      Hamilton, Charmain Danielle; Kovacs, Kit M.; Ims, Rolf Anker; Lydersen, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-27)
      Hauling out onto a solid substrate is an integral part of most pinnipeds’ activity budgets. Ringed seals (<i>Pusa hispida</i>) are an Arctic species that hauls out on sea ice routinely throughout the year. In 2006, a sudden change in the sea-ice regime occurred in Svalbard (Norway). Amongst other changes, the amount of land-fast ice declined sharply. This study examined the intra- and inter-annual ...

    • Haul-out behaviour of the world's northernmost population of harbour seals (Phoca vitulina) throughout the year 

      Hamilton, Charmain Danielle; Lydersen, Christian; Ims, Rolf Anker; Kovacs, Kit (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • Marine mammal hotspots in the Greenland and Barents Seas 

      Hamilton, Charmain Danielle; Lydersen, Christian; Aars, Jon; Biuw, Martin; Boltunov, Andrei; Born, Erik W.; Dietz, Rune; Folkow, Lars; Glazov, Dmitry M.; Haug, Tore; Heide-Jørgensen, Mads-Peter; Kettemer, Lisa Elena; Laidre, Kristin L.; Øien, Nils Inge; Nordøy, Erling Sverre; Rikardsen, Audun H.; Rosing-Asvid, Aqqalu; Semenova, Varvara; Shpak, Olga V.; Sveegaard, Signe; Ugarte, Fernando; Wiig, Øystein; Kovacs, Kit M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-04)
      Environmental change and increasing levels of human activity are threats to marine mam- mals in the Arctic. Identifying marine mammal hot - spots and areas of high species richness are essential to help guide management and conservation efforts. Herein, space use based on biotelemetric tracking devices deployed on 13 species (ringed seal <i>Pusa hispida</i>, bearded seal <i>Erignathus ...