Blar i forfatter "Leopold, Peter"

Viser treff 1-5 av 5

    • Evidence of separate influence of moon and sun on light synchronization of mussel's daily rhythm during the polar night 

      Tran, Damien; Andrade Rodriguez, Hector Antonio; Camus, Lionel; Leopold, Peter; Ballantine, Carl; Berge, Jørgen; Durier, Guillaume; Sow, Mohamedou; Ciret, Pierre (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-09)
      Marine organisms living at high latitudes are faced with a light climate that undergoes drastic annual changes, especially during the polar night (PN) when the sun remains below the horizon for months. This raises the question of a possible synchronization and entrainment of biological rhythms under the governance of light at very low intensities. We analyzed the rhythms of the mussel <i>Mytilus</i> ...

    • Genetic diversity and connectivity within Mytilus spp. in the subarctic and Arctic 

      Mathiesen, Sofie Smedegaard; Thyrring, Jakob; Hemmer-Hansen, Jakob; Berge, Jørgen; Sukhotin, Alexey A.; Leopold, Peter; Bekaert, Michaèl; Sejr, Mikael K; Nielsen, Einar Eg (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-26)
      Climate changes in the Arctic are predicted to alter distributions of marine species. However, such changes are difficult to quantify because information on present species distribution and the genetic variation within species is lacking or poorly examined. Blue mussels, Mytilus spp., are ecosystem engineers in the coastal zone globally. To improve knowledge of distribution and genetic structure of ...

    • Growth and behaviour of blue mussels, a re-emerging polar resident, follow a strong annual rhythm shaped by the extreme high Arctic light regime: Mussels' growth and behavior in Arctic 

      Tran, Damien; Andrade Rodriguez, Hector Antonio; Durier, Guillaume; Ciret, Pierre; Leopold, Peter; Sow, Mohamedou; Ballantine, Carl; Camus, Lionel; Berge, Jørgen; Perrigault, Mickael (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-14)
      Polar regions are currently warming at a rate above the global average. One issue of concern is the consequences on biodiversity in relation to the Northward latitudinal shift in distribution of temperate species. In the present study, lasting almost two years, we examined two phenological traits, i.e. the shell growth and behavioural rhythm of a recently re-established species in the high Arctic, ...

    • High Arctic Mytilus spp.: occurrence, distribution and history of dispersal 

      Leopold, Peter; Renaud, Paul Eric; Ambrose, William G; Berge, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-16)
      Many marine species are known to change their distribution in response to changing climatic conditions. One such example is the blue mussel Mytilus spp., spreading northward coincident with an increase in ocean temperatures. On Svalbard, the frst living specimens of Mytilus spp. were discovered in 2004. Here we present an analysis of the current distribution of Mytilus spp. on Svalbard, with a ...

    • Recruitment of benthic invertebrates in high Arctic fjords: Relation to temperature, depth, and season 

      Meyer, Kirstin S.; Sweetman, Andrew K; Kuklinski, Piotr; Leopold, Peter; Vogedes, Daniel Ludwig; Berge, Jørgen; Griffith, Colin; Young, Craig M; Renaud, Paul (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-30)
      In the high Arctic, recruitment of hard-bottom benthic organisms has been studied at single locations, but little is known about how it varies spatially or temporally, or how it is influenced by abiotic factors. In this study, settlement plates were simultaneously deployed at five locations in three Svalbard (Norway) fjords at depths ranging from 7 m to 215 m. Recruitment was significantly different ...