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Collection spécifique


Université de Neuchâtel

Creation of a raised bog in the Botanical garden of Neuchâtel : a tool for research, collections and public information

Mulhauser, Blaise ; Mulot, Matthieu ; Tritz, Jérémy ; Gueniat, Sylvian ; Koenig, Isabelle ; D’Inverno, Mirko ; Mitchell, Edward A.D.

In: Proceedings of the EuroGard VII Congress, 2015, p. 145-152

In September 2014 we created a small raised bog of ca. 100m2 in the Botanical garden of Neuchâtel. The material (marl and peat) was collected from a degraded peatland in an industrial area of the region. The bog was planted with over 30 species of mosses and vascular plants collected from bogs in the Jura Mountains and from existing collections. This object corresponds to the...

Université de Neuchâtel

Using testate amoeba community structure and functional diversity to assess the impact of climate changes on ecosystem functioning : finding relevant and convenient tools for bio-monitoring of "Sphagnum" peatlands evolution or recovery

Koenig, Isabelle ; Mitchell, Edward AD (Dir.) ; Le Bayon, Claire (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2017.

L’impact grandissant de l’homme sur les écosystèmes et les changements climatiques en cours font disparaître nombre de milieux naturels dans le monde. Il est aujourd’hui acquis que les écosystèmes naturels et la biodiversité ont un rôle important dans le bien-être de l’humanité et que les services qu’ils rendent ont une valeur monétaire qui peut être estimée (services...

Université de Neuchâtel

Impact of two hot and dry summers on the community structure and functional diversity of testate amoebae in an artificial bog, illustrating their use as bioindicators of peatland health

Koenig, Isabelle ; Christinat, K ; d’Inverno, Mirko ; Mitchell, Edward A.D

In: Mires and Peat, 2018, vol. 21, p. 1-24

Ongoing climate warming threatens the survival of bogs at the warm/dry limit of their distribution (e.g. in central Europe), and jeopardises the restoration of damaged bogs even more. Because vegetation changes can be slow, early indicators of hydrological change such as testate amoebae are useful. We used testate amoeba community structure and community weighted mean of functional traits...

Université de Neuchâtel

Response of Sphagnum Testate Amoebae to Drainage, Subsequent Re-wetting and Associated Changes in the Moss Carpet : Results from a Three Year Mesocosm Experiment

Koenig, Isabelle ; Schwendener, Florence ; Mulot, Matthieu ; Mitchell, Edward A.D

In: Acta Protozoologica, 2017, vol. 56, no. 3, p. 191-210

Sphagnum peatlands represent a globally significant pool and sink of carbon but these functions are threatened by ongoing climate change. Testate amoebae are useful bioindicators of hydrological changes, but little experimental work has been done on the impact of water table changes on communities. Using a mesocosm experimental setting that was previously used to assess the impact of...

Accès public à partir du 1 mars 2019
Université de Neuchâtel

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

Szelecz, Ildikò ; Koenig, Isabelle ; Seppey, Christophe V. W ; Le Bayon, Renée-Claire ; Mitchell, Edward A. D

In: Forensic Science International, 2018, vol. 286, p. 155-165

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...

Accès public à partir du 1 févr. 2019
Université de Neuchâtel

Taxonomic and functional traits responses of Sphagnum peatland testate amoebae to experimentally manipulated water table

Koenig, Isabelle ; Mulot, Matthieu, Laboratory of Soil Diversity, University of Neuchâtel, Switzerland ; Mitchell, Edward AD

In: Ecological Indicators, 2018, vol. 85, p. 342-351

Biomonitoring tools are useful to assess the impact of environmental changes on the functioning of ecosystems. Existing tools mostly require species identification, thus allowing to estimating changes in biodiversity, and possibly inferring ecosystem functioning, using functional diversity and traits based approaches. Testate amoebae are good indicators of surface moisture conditions in...

Université de Neuchâtel

Comparative ecology of vascular plant, bryophyte and testate amoeba communities in four Sphagnum peatlands along an altitudinal gradient in Switzerland

Koenig, Isabelle ; Feldmeyer-Christe, Elizabeth ; Mitchell, Edward AD

In: Ecological Indicators, 2015, vol. 54, p. 48-59

Monitoring tools are needed to assess changes in peatland biotic communities and ecosystem functions in response to on-going climate and other environmental changes. Although the responses of soil organisms and plants to ecological gradients and perturbations do not always correlate, peatland monitoring is mainly based on vegetation surveys. Testate amoebae, a group of protists, are important...