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Université de Neuchâtel

Soil protistology rebooted : 30 fundamental questions to start with

Geisen, Stefan ; Mitchell, Edward A.D ; Wilkinson, David M ; Adl, Sina ; Bonkowski, Michael ; Brown, Matthew W ; Fiore-Donno, Anna Maria ; Heger, Thierry J ; Jassey, Vincent E.J ; Krashevska, Valentyna ; Lahr, Daniel J.G ; Marcisz, Katarzyna ; Mulot, Matthieu ; Payne, Richard ; Singer, David ; Anderson, Roger O ; Charman, Dan J ; Ekelund, Flemming ; Griffiths, Bryan S ; Rønn, Regin ; Smirnov, Alexey ; Bass, David ; Belbahri, Lassaâd ; Berney, Cédric ; Blandenier, Quentin ; Chatzinotas, Antonis ; Clarholm, Marianne ; Dunthorn, Micah ; Feest, Alan ; Fernández, Leonardo D ; Foissner, Wilhelm ; Fournier, Bertrand ; Gentekaki, Eleni ; Hájek, Michal ; Helder, Johannes ; Jousset, Alexandre ; Koller, Robert ; Kumar, Santosh ; La Terza, Antonietta ; Lamentowicz, Mariusz ; Mazei, Yuri ; Santos, Susana S ; Seppey, Christophe V.W ; Spiegel, Frederick W ; Walochnik, Julia ; Winding, Anne ; Lara, Enrique

In: Soil Biology & Biochemistry, 2017, vol. 111, no. 94-103, p. 2017

Protists are the most diverse eukaryotes. These microbes are keystone organisms of soil ecosystems and regulate essential processes of soil fertility such as nutrient cycling and plant growth. Despite this, protists have received little scientific attention, especially compared to bacteria, fungi and nematodes in soil studies. Recent methodological advances, particularly in molecular biology...

Université de Neuchâtel

Patterns of earthworm, enchytraeid and nematode diversity and community structure in urban soils of different ages

Amossé, Joël ; Dózsa-Farkas, Klára ; Boros, Gergely ; Rochat, Guy ; Sandoz, Gauthier ; Fournier, Bertrand ; Mitchell, Edward A.D. ; Le Bayon, Renée-Claire

In: European Journal of Soil Biology, 2016, vol. 73, p. 46-58

Annelids (Lumbricidae and Enchytraeidae) and nematodes are common soil organisms and play important roles in organic matter decomposition, nutrient cycling and creation of soil structure and porosity. However, these three groups have rarely been studied together and only few studies exist for urban soils. We studied the diversity and community composition of annelids and nematodes in soils...

Université de Neuchâtel

Diversity of endospore-forming bacteria in sediment as a proxy for environmental lake history

Wunderlin, Tina ; Junier, Pilar (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Freshwater systems are of high ecological and economical importance but at the same time subjected to anthropogenic pressure such as input of pollutants, overfishing, changes in climate regime, and eutrophication (high nutrient input). For environmental management and the implementation of conservation measures, the dynamics of freshwater ecosystems need to be known and biological reference...

Université de Neuchâtel

Morphological, hydrological, biogeochemical and ecological changes and challenges in river restoration : the Thur River case study

Schirmer, M ; Luster, J ; Linde, N ; Perona, P ; Mitchell, E.A.D ; Barry, D.A ; Hollender, J ; Cirpka, O.A ; Schneider, P ; Vogt, T ; Radny, D ; Durisch-Kaiser, E

In: Hydrology and Earth System Sciences, 2014, vol. 18, no. 6, p. 2449-2462

River restoration can enhance river dynamics, environmental heterogeneity and biodiversity, but the underlying processes governing the dynamic changes need to be understood to ensure that restoration projects meet their goals, and adverse effects are prevented. In particular, we need to comprehend how hydromorphological variability quantitatively relates to ecosystem functioning and services,...

Université de Neuchâtel

Spatio-temporal variability and restoration effects on below-ground biodiversity and soil ecosystem functioning at the Thur floodplain, Switzerland

Samaritani, Emanuela ; Mitchell, Edward A. D. (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2013.

Biodiversity and its link to ecosystem functioning are the main subjects of a large variety of studies nowadays, because of the tremendous rapidity at which they are altered as a consequence of direct human impact or as a delayed effect of global changes. Floodplains are acknowledged to be among the most diverse ecosystems on the planet, in terms of species diversity, but also genetic, habitat...

Université de Fribourg

Insect and mollusc communities in wildflower strips : effects of plant diversity and surrounding landscape in an agro-ecosystem

Fabian, Yvonne ; Bersier, Louis-Félix (Dir.)

Thèse de doctorat : Université de Fribourg, 2013 ; no. 1780.

Fast 38% der Landfläche unserer Erde wird landwirtschaftlich genutzt. Ihr Beitrag zur Biodiversität ist deshalb wichtig für den Umweltschutz. Wenn landwirtschaftliche Flächen nachhaltig genutzt werden, können sie zu einer hohen Diversität beitragen, was sich positiv auf sogenannte Ökosystemleistungen wie Bestäubung und biologische Schädlingsbekämpfung auswirkt. Die Identifizierung von...

Université de Neuchâtel

Factors modulating cottongrass seedling growth stimulation to enhanced nitrogen and carbon dioxide : compensatory tradeoffs in leaf dynamics and allocation to meet potassium-limited growth

Siegenthaler, Andy ; Buttler, Alexandre ; Grosvernier, Philippe ; Gobat, Jean-Michel ; Nilsson, Mats B. ; Mitchell Edward A. D.

In: Oecologia, 2013, vol. 171, no. 2, p. 557-570

Eriophorum vaginatum is a characteristic species of northern peatlands and a keystone plant for cutover bog restoration. Understanding the factors affecting E. vaginatum seedling establishment (i.e. growth dynamics and allocation) under global change has practical implications for the management of abandoned mined bogs and restoration of their C-sequestration function. We studied...

Université de Neuchâtel

Above- and belowground linkages in Sphagnum peatland : climate warming affects plant-microbial interactions

Jassey, Vincent E. J. ; Chiapusio, Geneviève ; Binet, Philippe ; Buttler, Alexandre ; Laggoun-Défarge, Fatima ; Delarue, Frédéric ; Bernard, Nadine ; Mitchell, Edward A. D. ; Toussaint, Marie-Laure ; Francez, André-Jean ; Gilbert, Daniel

In: Global Change Biology, 2013, vol. 19, no. 3, p. 811-823

Peatlands contain approximately one third of all soil organic carbon (SOC). Warming can alter above- and belowground linkages that regulate soil organic carbon dynamics and C-balance in peatlands. Here we examine the multiyear impact of in situ experimental warming on the microbial food web, vegetation, and their feedbacks with soil chemistry. We provide evidence of both positive and...

Université de Fribourg

Alien plant species with a wider global distribution are better able to capitalize on increased resource availability

Dawson, Wayne ; Rohr, Rudolf P. ; Kleunen, Mark van ; Fischer, Markus

In: New Phytologist, 2012, vol. 194, no. 3, p. 859–867

A high ability of alien plant species to capitalize on increases in resource availability has been suggested as an explanation for being globally successful. Here, we tested this hypothesis meta-analytically using existing data from experiments manipulating plant resources (light, water and nutrients).From these studies we extracted the response to resource increase of biomass, as an indicator of...

Université de Neuchâtel

Distribution des communautés lombriciennes et pédogénèse en forêts alluviales : étude le long de deux gradients écologiques

Salomé, Clémence ; Gobat, Jean-Michel (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012 ; 2260.

Support physique et chimique indispensable, lieu d’échanges de matières et de circulation d'énergie, le sol représente une composante essentielle en tant que support de la vie et est au cœur même du fonctionnement des écosystèmes terrestres. Les fonctions de nutrition et de recyclage des éléments sont assurées en grande partie par l’horizon organo-minéral, le plus souvent...