Blar i forfatter "Mitchell, Edward A.D."

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    • Assessing the responses of Sphagnum micro-eukaryotes to climate changes using high throughput sequencing 

      Reczuga, Monika Katarzyna; Seppey, Victor William Christophe; Mulot, Matthieu; Jassey, Vincent E.J.; Buttler, Alexandre; Slowinska, Sandra; Slowinski, Michal; Lara, Enrique; Lamentowicz, Mariusz; Mitchell, Edward A.D. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-18)
      Current projections suggest that climate warming will be accompanied by more frequent and severe drought events. Peatlands store ca. one third of the world’s soil organic carbon. Warming and drought may cause peatlands to become carbon sources through stimulation of microbial activity increasing ecosystem respiration, with positive feedback effect on global warming. Micro-eukaryotes play a key role ...

    • 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. ...

    • Niche Conservatism Drives the Elevational Diversity Gradient in Major Groups of Free-Living Soil Unicellular Eukaryotes 

      Fernández, Leonardo D.; Seppey, Victor William Christophe; Singer, David; Fournier, Bertrand; Tatti, Dylan; Mitchell, Edward A.D.; Lara, Enrique (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-30)
      Ancestral adaptations to tropical-like climates drive most multicellular biogeography and macroecology. Observational studies suggest that this niche conservatism could also be shaping unicellular biogeography and macroecology, although evidence is limited to Acidobacteria and testate amoebae. We tracked the phylogenetic signal of this niche conservatism in far related and functionally contrasted ...

    • Protist taxonomic and functional diversity in soil, freshwater and marine ecosystems 

      Singer, David; Seppey, Victor William Christophe; Lentendu, Guillaume; Dunthorn, Micah; Bass, David; Belbahri, Lassaad; Blandenier, Quentin; Debroas, Didier; de Groot, G. Arjen; de Vargas, Colomban; Domaizon, Isabelle; Duckert, Clément; Izaguirre, Irina; Koenig, Isabelle; Mataloni, Gabriela; Schiaffino, M. Romina; Mitchell, Edward A.D.; Geisen, Stefan; Lara, Enrique (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-19)
      Protists dominate eukaryotic diversity and play key functional roles in all ecosystems, particularly by catalyzing carbon and nutrient cycling. To date, however, a comparative analysis of their taxonomic and functional diversity that compares the major ecosystems on Earth (soil, freshwater and marine systems) is missing. Here, we present a comparison of protist diversity based on standardized high ...

    • 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 ...