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    • Plusieurs versions

    An Analysis of Respiratory Activity, Q 10 , and Microbial Community Composition of Soils from High and Low Tussock Sites at Toolik, Alaska

    Anderson, O. Roger
    Journal of Eukaryotic Microbiology, March 2010, Vol.57(2), pp.218-219 [Revue évaluée par les pairs]

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    Comparative protozoology : ecology, physiology, life history

    Anderson, O. Roger
    Berlin ; Heidelberg [etc.] : Springer
    [1988]
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    Titre: Comparative protozoology : ecology, physiology, life history / O. Roger Anderson
    Auteur: Anderson, O. Roger
    Editeur: Berlin ; Heidelberg [etc.] : Springer
    Date: [1988]
    Collation: XII, 482 p. : ill. ; 24 cm
    Sujet RERO: Écologie - Physiologie - Protozoaires - Biologie du développement
    Classification: LC QL366
    Identifiant: 3540180826 (Berlin) (ISBN); 0387180826 (New York) (ISBN); http://catalogue.bnf.fr/ark:/12148/cb373645055 (URN)
    No RERO: 0972357
    Permalien:
    http://data.rero.ch/01-0972357/html?view=FR_V1

    • Plusieurs versions

    A study of undergraduate physics students' understanding of heat conduction based on mental model theory and an ontology–process analysis

    Chiou, Guo‐Li, Anderson, O. Roger
    Science Education, September 2010, Vol.94(5), pp.825-854 [Revue évaluée par les pairs]

    • Plusieurs versions

    PROGRESS IN APPLICATION OF THE NEUROSCIENCES TO AN UNDERSTANDING OF HUMAN LEARNING: THE CHALLENGE OF FINDING A MIDDLE-GROUND NEUROEDUCATIONAL THEORY

    Anderson, O.
    International Journal of Science and Mathematics Education, 2014, Vol.12(3), pp.475-492 [Revue évaluée par les pairs]

    • Plusieurs versions

    Microbial Communities Associated with Tree Bark Foliose Lichens: A Perspective on their Microecology

    Anderson, O. Roger
    Journal of Eukaryotic Microbiology, July 2014, Vol.61(4), pp.364-370 [Revue évaluée par les pairs]

    • Plusieurs versions

    Soil Respiration, Climate Change and the Role of Microbial Communities

    Anderson, O. Roger
    Protist, 2011, Vol.162(5), pp.679-690 [Revue évaluée par les pairs]

    • Plusieurs versions

    Naked Amoebae in Biofilms Collected from a Temperate Freshwater Pond

    Anderson, O. Roger
    Journal of Eukaryotic Microbiology, July 2013, Vol.60(4), pp.429-431 [Revue évaluée par les pairs]

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    Titre: Evidence for Coupling of the Carbon and Phosphorus Biogeochemical Cycles in Freshwater Microbial Communities
    Auteur: Anderson, O. Roger
    Editeur: Columbia University
    Date: 2018
    Sujet: Biogeochemistry ; Carbon Cycle (Biogeochemistry) ; Phosphorus Cycle (Biogeochemistry) ; Marine Microbial Ecology
    Description: Considerable attention has been given to the roles of the carbon and phosphate cycles in aquatic environments, but less attention has been given to an experimental analysis of the coupling of the C and P cycles in freshwater and marine ecosystems. Using laboratory microcosm experiments, prepared with natural pond-water microbial communities, evidence is presented for the coupling of dissolved organic C with microbial production of alkaline phosphatase driving the phosphorus cycle in freshwater microbial communities. The effects of glucose C-supplementation in microcosm microbial communities (including bacteria and heterotrophic nanoflagellates) on gains in microbial C-content and alkaline phosphatase activity (APA) were estimated in relation to control microcosms without C-supplementation. The C-supplementation increased total microbial APA (pmol min−1 μg−1 bacterial C) in the C-supplemented treatment (6.5 ± 0.6) compared to the non-supplemented cultures (5.1 ± 1.7). Microbial-bound APA in the C-supplemented treatment was particularly enhanced (4.4 ± 0.9) compared to control cultures (1.3 ± 0.8), but the amount of free (soluble) APA in the aquatic phase was less compared to the controls (n = 5, p < 0.001). Alkaline phosphatase activity was highly correlated (r = 0.97) with bacterial densities in the C-supplemented cultures, further supporting the hypothesis that C-supplementation can increase...
    Identifiant: 10.7916/D8DV2X9B (DOI); 2296-7745 (RELATED ISSN); (RELATED ISBN); 10.3389/fmars.2018.00020 (RELATED DOI)

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    Leaf‐ and cell‐level carbon cycling responses to a nitrogen and phosphorus gradient in two Arctic tundra species

    Heskel, Mary A., Anderson, O. Roger, Atkin, Owen K., Turnbull, Matthew H., Griffin, Kevin L.
    American Journal of Botany, October 2012, Vol.99(10), pp.1702-1714 [Revue évaluée par les pairs]
    John Wiley & Sons, Inc.
    Disponible
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    Titre: Leaf‐ and cell‐level carbon cycling responses to a nitrogen and phosphorus gradient in two Arctic tundra species
    Auteur: Heskel, Mary A.; Anderson, O. Roger; Atkin, Owen K.; Turnbull, Matthew H.; Griffin, Kevin L.
    Sujet: Arctic Tundra ; Carbon Cycling ; Chloroplasts ; Light Inhibition ; Mitochondria ; Nitrogen ; Phosphorus ; Photosynthesis ; Respiration
    Description: • Consequences of global climate change are detectable in the historically nitrogen‐ and phosphorus‐limited Arctic tundra landscape and have implications for the terrestrial carbon cycle. Warmer temperatures and elevated soil nutrient availability associated with increased microbial activity may influence rates of photosynthesis and respiration. • This study examined leaf‐level gas exchange, cellular ultrastructure, and related leaf traits in two dominant tundra species, , a woody shrub, and , a tussock sedge, under a 3‐yr‐old treatment gradient of nitrogen (N) and phosphorus (P) fertilization in the North Slope of Alaska. • Respiration increased with N and P addition—the highest rates corresponding to the highest concentrations of leaf N in both species. The inhibition of respiration by light (“Kok effect”) significantly reduced respiration rates in both species ( < 0.001), ranged from 12–63% (mean 34%), and generally decreased with fertilization for both species. However, in both species, observed rates of photosynthesis did not increase, and photosynthetic nitrogen use efficiency generally decreased under increasing fertilization. Chloroplast and mitochondrial size and density were highly sensitive to N and P fertilization ( < 0.001), though species interactions indicated divergent cellular organizational strategies. • Results from this study demonstrate a species‐specific decoupling of respiration and photosynthesis under N and P fertilization, implying an alteration of the carbon balance of the tundra ecosystem under future conditions.
    Fait partie de: American Journal of Botany, October 2012, Vol.99(10), pp.1702-1714
    Identifiant: 0002-9122 (ISSN); 1537-2197 (E-ISSN); 10.3732/ajb.1200251 (DOI)

    • Plusieurs versions

    Leaf- and cell-level carbon cycling responses to a nitrogen and phosphorus gradient in two Arctic tundra species

    Heskel, Mary A, Anderson, O Roger, Atkin, Owen K, Turnbull, Matthew H, Griffin, Kevin L
    American journal of botany, October 2012, Vol.99(10), pp.1702-14 [Revue évaluée par les pairs]