Blar i forfatter "Seppey, Christophe Victor W."

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    • Comparative vegetation survey with focus on cryptogamic covers in the high Arctic along two differing catenas 

      Kern, Ramona; Hotter, Vivien; Frossard, Aline; Albrecht, Martin; Baum, Christel; Tytgat, Bjorn; de Maeyer, Lotte; Velázquez, David; Seppey, Christophe Victor W.; Frey, Beat; Plotze, Michael; Verleyen, Elie; Quesada, Antonio; Svenning, Mette Marianne; Glaser, Karin; Karsten, Ulf (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-24)
      Although cryptogamic covers are important ecosystem engineers in high Arctic tundra, they were often neglected in vegetation surveys. Hence we conducted a systematic survey of cryptogamic cover and vascular plant coverage and composition at two representative, but differing Arctic sites (Ny-Ålesund, Svalbard) along catenas with a natural soil moisture gradient, and integrated these data with ...

    • Environmental filtering and phylogenetic clustering correlate with the distribution patterns of cryptic protist species 

      Singer, David; Kosakyan, Anush; Seppey, Christophe Victor W.; Pillonel, Amandine; Fernandez, Leonardo D; Fontaneto, Diego; Mitchell, Edward A.D.; Lara, Enrique (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-29)
      The community composition of any group of organisms should theoretically be determined by a combination of assembly processes including resource partitioning, competition, environmental filtering, and phylogenetic legacy. Environmental DNA studies have revealed a huge diversity of protists in all environments, raising questions about the ecological significance of such diversity and the degree to ...

    • Higher spatial than seasonal variation in floodplain soil eukaryotic microbial communities 

      Fournier, Bertrand; Samaritani, Emanuela; Frey, Beat; Seppey, Christophe Victor W.; Lara, Enrique; Heger, Thierry J.; Mitchell, Edward A.D. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-10)
      Beta diversity is a key component of biodiversity with implications ranging from species dynamics to ecosystem functioning. However, β-diversity and its drivers have received little attention, especially for micro-eukaryotes which play key roles in soil functioning. We studied the diversity of soil micro-eukaryotes in a Swiss lowland floodplain using high-throughput Illumina sequencing of soil DNA. ...

    • Soil chemistry changes beneath decomposing cadavers over a one-year period 

      Szelecz, Ildiko; Koenig, Isabelle; Seppey, Christophe Victor W.; Le Bayon, Renee-Claire; Mitchell, Edward A.D. (Journal article; Tidsskriftartikkel, 2018-03-06)
      Decomposing vertebrate cadavers release large, localized inputs of nutrients. These temporally limited resource patches affect nutrient cycling and soil organisms. The impact of decomposing cadavers on soil chemistry is relevant to soil biology, as a natural disturbance, and forensic science, to estimate the postmortem interval. However, cadaver impacts on soils are rarely studied, making it difficult ...

    • Soil protist diversity in the Swiss western Alps is better predicted by topo-climatic than by edaphic variables 

      Seppey, Christophe Victor W.; Broennimann, Olivier; Buri, Aline; Yashiro, Erika; Pinto-Figueroa, Eric; Singer, David; Blandenier, Quentin; Mitchell, Edward A.D.; Niculita-Hirzel, Helene; Guisan, Antoine; Lara, Enrique (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-01)
      <i>Aim</i> - Trends in spatial patterns of diversity in macroscopic organisms can be well predicted from correlative models, using topo‐climatic variables for plants and animals allowing inference over large scales. By contrast, diversity in soil microorganisms is generally considered as mostly driven by edaphic variables and, therefore, difficult to extrapolate on a large spatial scale based on ...

    • Tipping point in plant-fungal interactions under severe drought causes abrupt rise in peatland ecosystem respiration 

      Jassey, Vincent E.J.; Reczuga, Monika Katarzyna; Zielinska, Malgorzata; Slowinska, Sandra; Robroek, Bjorn J M; Mariotte, Pierre; Seppey, Christophe Victor W.; Lara, Enrique; Barabach, Jan; Slowinski, Michal; Bragazza, Luca; Chojnicki, Bogdan H.; Lamentowicz, Mariusz; Mitchell, Edward A.D.; Buttler, Alexandre (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-09)
      Ecosystems are increasingly prone to climate extremes, such as drought, with long‐lasting effects on both plant and soil communities and, subsequently, on carbon (C) cycling. However, recent studies underlined the strong variability in ecosystem's response to droughts, raising the issue of nonlinear responses in plant and soil communities. The conundrum is what causes ecosystems to shift in response ...