Blar i forfatter "Espinasse, Boris Dristan"

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    • The complete mitochondrial genome of the southern calanoid copepod Calanus simillimus Giesbrecht, 1902 

      Smolina, Irina Vladimirovna; Espinasse, Marina; Amundsen, Cesilie Røtnes; Espinasse, Boris Dristan (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-07)
      The complete mitochondrial genome of Calanus simillimus is 27,876 bp in length (GenBank accession OK500294) and containing 13 protein-coding genes (PCGs), 2 rRNA genes, 22 transfer RNA genes. The gene order is novel compared to other Calanus species and copepods with sequenced mitogenomes. Phylogenetic analysis suggests that C. simillimus represent a fourth group within Calanus genus in addition ...

    • Conditions for assessing zooplankton abundance with LOPC in coastal waters 

      Espinasse, Boris Dristan; Basedow, Sünnje Linnéa; Schultes, Sabine; Zhou, Meng; Berline, Leo; Carlotti, Francois (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-20)
      Recent technical advances in laser-based systems to measure zooplankton distribution have opened new perspectives in ecological and behavioral studies by significantly improving the horizontal and vertical sampling resolution, providing information on zooplankton patchiness and on the influence of small scale physical processes. The application of laser-based systems also led to new challenges on ...

    • Intracolony variability in winter feeding and migration strategies of Atlantic puffins and black‑legged kittiwakes 

      Charrier, Julie; Anker-Nilssen, Tycho; Fort, Jérôme; Jessopp, Mark; Strøm, Hallvard; Espinasse, Boris Dristan (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-23)
      Polar ecosystems are subjected to many stressors, including climate change, that impact their overall functioning. Seabirds are good bioindicators of these systems as they readily respond to changes in environmental conditions. To quantify how environmental changes afect their life history, data on seabird diet, spatial distribution and body condition are needed to reveal the underlying mechanisms. ...

    • Long-distance particle transport to the central Ionian Sea 

      Berline, Léo; Doglioli, Andrea Michelangelo; Petrenko, Anne; Barrillon, Stéphanie; Espinasse, Boris Dristan; Le Moigne, Frederic A. C.; Simon-Bot, François; Thyssen, Melilotus; Carlotti, F. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-14)
      Together with T –S properties, particle abundance in situ measurements are useful to discriminate water masses and derive circulation patterns. In the upper layers of the Ionian Sea, the fresher Atlantic Waters (AW) recently crossing the Sicily Channel meet the resident and saltier AW, which circulated cyclonically in the eastern basin and modified after evaporation and eventually cooling. In ...

    • Macrozooplankton and micronekton diversity and associated carbon vertical patterns and fluxes under distinct productive conditions around the Kerguelen Islands 

      Cotté, C.; Ariza, A.; Berne, A.; Habasque, J.; Lebourges-Dhaussy, A.; Roudaut, G.; Espinasse, Boris Dristan; Hunt, B.P.V.; Pakhomov, E.A.; Henschke, N.; Péron, C.; Conchon, A.; Koedooder, C.; Izard, L.; Cherel, Y. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-13)
      Mesopelagic communities are characterized by a large biomass of diverse macrozooplankton and micronekton (MM) performing diel vertical migration (DVM) connecting the surface to the deeper ocean and contributing to biogeochemical fluxes. In the Southern Ocean, a prominent High Nutrient Low Chlorophyll (HNLC) and low carbon export region, the contribution of MM to the vertical carbon flux of the ...

    • Pelagic food web structure in high nutrient low chlorophyll (HNLC) and naturally iron fertilized waters in the Kerguelen Islands region, Southern Ocean 

      Hunt, Brian P. V.; Espinasse, Boris Dristan; Pakhomov, Evgeny A.; Cherel, Yves; Cotté, Cédric; Delegrange, Alice; Henschke, Natasha (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-19)
      The Kerguelen Plateau is a region of natural iron fertilization in the Southern Ocean, within the typically iron limited High Nutrient Low Chlorophyll (HNLC) waters of the eastward flowing Antarctic Circumpolar Current. Between 26 February and 19 March 2018, the MOBYDICK expedition investigated pelagic ecosystem dynamics in the Kerguelen Island region on the northern plateau during the post-phytoplankton ...

    • The role of water mass advection in staging of the Southern Ocean Salpa thompsoni populations 

      Henschke, Natasha; Espinasse, Boris Dristan; Stock, Charles A.; Liu, Xiao; Barrier, Nicolas; Pakhomov, Evgeny A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-01)
      Salpa thompsoni is an important grazer in the Southern Ocean. Their abundance in the western Antarctic Peninsula is highly variable, varying by up to 5000-fold inter-annually. Here, we use a particle-tracking model to simulate the potential dispersal of salp populations from a source location in the Antarctic Circumpolar Current (ACC) to the Palmer Long Term Ecological Research (PAL LTER) study ...

    • Stable Isotope Trajectory Analysis (SITA): A new approach to quantify and visualize dynamics in stable isotope studies 

      Sturbois, Anthony; Cucherousset, Julien; De Cáceres, Miquel; Desroy, Nicolas; Riera, Pascal; Carpentier, Alexandre; Quillien, Nolwenn; Grall, Jacques; Espinasse, Boris Dristan; Cherel, Yves; Schaal, Gauthier (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-16)
      Ecologists working with stable isotopes have to deal with complex datasets including temporal and spatial replication, which makes the analysis and the representation of patterns of change challenging, especially at high resolution. Due to the lack of a commonly accepted conceptual framework in stable isotope ecology, the analysis and the graphical representation of stable isotope spatial and ...

    • Surface aggregations of Calanus finmarchicus during the polar night 

      Espinasse, Boris Dristan; Daase, Malin; Halvorsen, Elisabeth; Reigstad, Marit; Berge, Jørgen; Basedow, Sünnje Linnéa (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-16)
      While marine ecosystems in polar areas were thought to be mostly inactive during the polar night, recent observations in the Arctic highlight that dynamic biological interactions occur across all trophic levels. One particularly interesting observation made repeatedly is the occurrence of Calanus finmarchicus, a key species at the base of the food web, in the upper part of the water column in early ...

    • Temporal dynamics in zooplankton δ13C and δ15N isoscapes for the North Atlantic Ocean: Decadal cycles, seasonality, and implications for predator ecology 

      Espinasse, Boris Dristan; Sturbois, Anthony; Basedow, Sünnje Linnéa; Hélaouët, Pierre; Johns, David G.; Newton, Jason; Trueman, Clive N. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-17)
      The limited amount of ecological data covering offshore parts of the ocean impedes our ability to understand and anticipate the impact of anthropogenic stressors on pelagic marine ecosystems. Isoscapes, i.e., spatial models of the distribution of stable isotope ratios, have been employed in the recent years to investigate spatio-temporal patterns in biogeochemical process and ecological responses. ...

    • Water column distribution of zooplanktonic size classes derived from in-situ plankton profilers: Potential use to contextualize contaminant loads in plankton 

      Espinasse, Boris Dristan; Pagano, M.; Basedow, Sünnje Linnéa; Chevalier, C.; Malengros, D.; Carlotti, F. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-29)
      Pollution is one of the main anthropogenic threats to marine ecosystems. Studies analysing the accumulation and transfer of contaminants in planktonic food webs tend to rely on samples collected in discrete water bodies. Here, we assessed the representativeness of measurements at the chlorophyll-a maximum layer during the MERITEHIPPOCAMPE cruise for the entire water column by investigating the ...