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  • 1. F. Stallard, Robert
    et al.
    Lindell, Lina
    Geology, hydrology, and soils2014In: Perú: Cordillera Escalera-Loreto / [ed] Nigel Pitman, Corine Vriesendorp, Diana Alvira, Jonathan A. Markel, Mark Johnston, Ernesto Ruelas Inzunza, Agustín Lancha Pizango, Gloria Sarmiento Valenzuela, Patricia Álvarez-Loayza, Joshua Homan, Tyana Wachter, Álvaro del Campo, Douglas F. Stotz, Sebastian Heilpern, Chicago: The Field Museum , 2014, p. 280-292Chapter in book (Other academic)
    Abstract [en]

    The Cordillera Escalera mountain range on the Loreto-San Martín border in Amazonian Peru was barely known to scientists until the September 2013 expedition described in this report. Richly illustrated with twenty four color plates featuring more than one hundred photographs, this volume contains the full results of the expedition’s rapid inventories of the geology, plants, fishes, amphibians, reptiles, birds, and mammals in the Cordillera Escalera, as well as in-depth descriptions of the history, daily life, and natural resource use of local Shawi communities. Contributors also discuss threats to and opportunities for the landscape and its people and offer recommendations for sustaining biodiversity and human well-being in this megadiverse region of Peru. This volume contains the expedition team’s full report in both Spanish and English, as well as an overview in Shawi.

  • 2.
    Högvall, Daniel
    Växjö University, Faculty of Humanities and Social Sciences, School of Education.
    Demokratifostran och elevinflytande: En studie om lärares tolkning av och arbete med skolans demokratiska uppdrag2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med undersökningen var att undersöka hur lärare tolkar skolans demokratiska uppdrag, samt hur tolkningen gestaltas i den faktiska undervisningssituationen. Uppsatsens teorianknytning består av traditionella demokratiteorier sammanfogade till en analysmodell. Undersökningen har genomförts med fem informanter arbetandes på en högstadieskola. De har fått samtala med mig om hur de tolkar skolans demokratiska uppdrag samt hur de arbetar med uppdraget. Jag har konstaterat att de intervjuade lärarna i stort uppfattar uppdraget på ett likartat sätt. Det som främst skiljer dem åt är vägen att nå målet. Grunden till skillnaden är informanternas uppfattning om hur ansvarstagande eleverna är. Jag har även intresserat mig för dilemmat som informanterna beskriver med att skolans demokratiska uppdrag ibland kan få skendemokratiska konsekvenser.

  • 3.
    Stefani, Franck O. P.
    et al.
    Université de Montréal, Canada.
    Bell, Terrence H.
    Université de Montréal, Canada.
    Marchand, Charlotte
    Université de Montréal, Canada.
    de la Providencia, Ivan E.
    Université de Montréal, Canada.
    El Yassimi, Abdel
    Université de Montréal, Canada.
    St-Arnaud, Marc
    Université de Montréal, Canada.
    Hijri, Mohamed
    Université de Montréal, Canada.
    Culture-Dependant and -Independent Methods Capture Different Microbial Community Fractions in Hydrocarbon-Contaminated Soils2015In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 10, no 6, article id e0128272Article in journal (Refereed)
    Abstract [en]

    Bioremediation is a cost-effective and sustainable approach for treating polluted soils, but our ability to improve on current bioremediation strategies depends on our ability to isolate microorganisms from these soils. Although culturing is widely used in bioremediation research and applications, it is unknown whether the composition of cultured isolates closely mirrors the indigenous microbial community from contaminated soils. To assess this, we paired culture-independent (454-pyrosequencing of total soil DNA) with culture-dependent (isolation using seven different growth media) techniques to analyse the bacterial and fungal communities from hydrocarbon-contaminated soils. Although bacterial and fungal rarefaction curves were saturated for both methods, only 2.4% and 8.2% of the bacterial and fungal OTUs, respectively, were shared between datasets. Isolated taxa increased the total recovered species richness by only 2% for bacteria and 5% for fungi. Interestingly, none of the bacteria that we isolated were representative of the major bacterial OTUs recovered by 454-pyrosequencing. Isolation of fungi was moderately more effective at capturing the dominant OTUs observed by culture-independent analysis, as 3 of 31 cultured fungal strains ranked among the 20 most abundant fungal OTUs in the 454-pyrosequencing dataset. This study is one of the most comprehensive comparisons of microbial communities from hydrocarbon-contaminated soils using both isolation and high-throughput sequencing methods.

  • 4.
    Turner, Stephanie
    et al.
    Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. Fed Inst Geosci & Nat Resources BGR, Germany.
    Mikutta, Robert
    Leibniz Univ Hannover, Germany;Martin Luther Univ Halle Wittenberg, Germany.
    Guggenberger, Georg
    Leibniz Univ Hannover, Germany.
    Schaarschmidt, Frank
    Leibniz Univ Hannover, Germany.
    Schippers, Axel
    Fed Inst Geosci & Nat Resources BGR, Germany.
    Distinct pattern of nitrogen functional gene abundances in top- and subsoils along a 120,000-year ecosystem development gradient2019In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 132, p. 111-119Article in journal (Refereed)
    Abstract [en]

    Soil microorganisms are key players of the nitrogen cycle and relevant for soil development. While the community structure of nitrogen-cycling microorganisms during initial soil development is already well investigated, knowledge about the patterns during long-term ecosystem development is limited. In this study, nitrogen functional genes of ammonia-oxidizers (amoA), nitrate-reducers (narG), and chitin-degraders (chiA) were determined via quantitative PCR and the functional community composition of archaeal ammonia-oxidizers was analyzed via clone libraries and DNA sequencing (amoA) in soil depth profiles along the 120,000-year Franz Josef chronosequence (New Zealand). The results show that absolute nitrogen functional gene abundances change significantly during long-term soil development. In organic layers, narG and chiA gene abundances were highest in young to intermediate-aged soils and then decreased following progressive and retrogressive development of the vegetation. While relative archaeal amoA gene abundance (proportional to total cell counts) decreased in the oldest phosphorus-limited topsoils, relative narG and chiA gene abundances remained constant. In subsoils, archaeal amoA and narG gene abundances also decreased with ecosystem retrogression that coincided with the increasing content of iron and aluminum oxides as well as other clay-sized minerals. In contrast, subsoil chiA gene abundances were hardly affected by soil age. The analysis of the archaeal amoA community revealed a compositional shift during long-term ecosystem development. Our study provides evidence that the community structure of nitrogen-cycling microorganisms in top- and subsoils is significantly affected by long-term ecosystem development and suggests an important role of the mineral phase in subsoils.

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