Université de Neuchâtel

Time to regulate microbial eukaryote nomenclature

Lahr Daniel J. G. ; Lara, Enrique ; Mitchell, Edward A. D.

In: Biological Journal of the Linnean Society, 2012, vol. 107, p. 469-476

Nomenclature of microbial eukaryotes has been historically relegated to secondary importance. This is a legacy of the traditional classification of life into the most studied multicellular forms (plants, fungi, and animals). Despite the revolution in an understanding of eukaryotic diversity and relationships that has been achieved as a result of the use of molecular techniques, the description of...

Université de Neuchâtel

The Revised Classification of Eukaryotes

Adl, Sina M. ; Simpson, Alastair G. B. ; Lane, Christopher E. ; Lukeš, Julius ; Bass, David ; Bowser, Samuel S. ; Brown, Matthew W. ; Burki, Fabien ; Dunthorn, Micah ; Hampl, Vladimir ; Heiss, Aaron ; Hoppenrath, Mona ; Lara, Enrique ; le Gall, Line ; Lynn, Denis H. ; McManus, Hilary ; Mitchell, Edward A. D. ; Mozley-Stanridge, Sharon E. ; Parfrey, Laura W. ; Pawlowski, Jan ; Rueckert, Sonja ; Shadwick, Laura ; Schoch, Conrad L. ; Smirnov, Alexey ; Spiegel, Frederick W.

In: Journal of Eukaryotic Microbiology, 2012, vol. 59, no. 5, p. 429-514

This revision of the classification of eukaryotes, which updates that of Adl et al. [J. Eukaryot. Microbiol. 52 (2005) 399], retains an emphasis on the protists and incorporates changes since 2005 that have resolved nodes and branches in phylogenetic trees. Whereas the previous revision was successful in re-introducing name stability to the classification, this revision provides a...

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 Neuchâtel

Chemical and Biological Gradients along the Damma Glacier Soil Chronosequence, Switzerland

Bernasconi, Stefano M. ; Bauder, Andreas ; Bourdon, Bernard ; Brunner, Ivano ; Bünemann, Else ; Chris, Iso ; Derungsg, Nicolas ; Edwards, Peter ; Farinotti, Daniel ; Frey, Beat ; Frossard, Emmanuel ; Furrer, Gerhard ; Gierga, Merle ; Göransson, Hans ; Gülland, Kathy ; Hagedorn, Frank ; Hajdas, Irka ; Hindshawc, Ruth ; Ivy-Ochs, Susan ; Jansa, Jan ; Jonas, Tobias ; Kiczkac, Mirjam ; Kretzschmar, Ruben ; Lemarchand, Emmanuel ; Luster, Jörg ; Magnusson, Jan ; Mitchell, Edward A. D. ; Venterink, Harry Olde ; Plötze, Michael ; Reynolds, Ben ; Smittenberg, Rienk H. ; Stähli, Manfred ; Tamburini, Federica ; Tipper, Edward T. ; Wacker, Lukas ; Welc, Monika ; Wiederhold, Jan G. ; Zeyer, Josef ; Zimmermann, Stefan ; Zumsteg, Anita

In: Vadose Zone Journal, 2011, vol. 10, no. 3, p. 867-883

Soils are the product of a complex suite of chemical, biological, and physical processes. In spite of the importance of soils for society and for sustaining life on earth, our knowledge of soil formation rates and of the influence of biological activity on mineral weathering and geochemical cycles is still limited. In this paper we provide a description of the Damma Glacier Critical Zone...

Université de Neuchâtel

Can pollution bias peatland paleoclimate reconstruction?

Payne, Richard J. ; Mitchell, Edward A. D. ; Nguyen-Viet, Hung ; Gilbert, Daniel

In: Quaternary Research, 2012, vol. 78, no. 2, p. 170-173

Peatland testate amoebae are widely used to reconstruct paleohydrological/climatic changes, but many species are also known to respond to pollutants. Peatlands around the world have been exposed to anthropogenic and intermittent natural pollution through the late Holocene. This raises the question: can pollution lead to changes in the testate amoeba paleoecological record that could be...

Université de Neuchâtel

Glasshouse vs field experiments: do they yield ecologically similar results for assessing N impacts on peat mosses?

Limpens, J. ; Granath, G. ; Aerts, R. ; Heijmans, M. M. P. D. ; Sheppard, L. J. ; Bragazza, L. ; Williams, B. L. ; Rydin, H. ; Bubier, J. ; Moore, T. ; Rochefort, L. ; Mitchell, Edward A. D. ; Buttler, A. ; van den Berg, L. J. L. ; Gunnarsson, U. ; Francez, A. -J. ; Gerdol, R. ; Thormann, M. ; Grosvernier, P. ; Wiedermann, M. M. ; Nilsson, M. B. ; Hoosbeek, M. R. ; Bayley, S. ; Nordbakken, J. -F. ; Paulissen, M. P. C. P. ; Hotes, S. ; Breeuwer, A. ; Ilomets, M. ; Tomassen, H. B. M. ; Leith, I. ; Xu, B.

In: New Phytologist, 2012, vol. 195, no. 2, p. 408-418

• Peat bogs have accumulated more atmospheric carbon (C) than any other terrestrial ecosystem today. Most of this C is associated with peat moss (Sphagnum) litter. Atmospheric nitrogen (N) deposition can decrease Sphagnum production, compromising the C sequestration capacity of peat bogs. The mechanisms underlying the reduced production are uncertain, necessitating...

Université de Neuchâtel

COI Barcoding of Nebelid Testate Amoebae (Amoebozoa: Arcellinida): Extensive Cryptic Diversity and Redefinition of the Hyalospheniidae Schultze

Kosakyan, Anush ; Heger, Thierry J. ; Leander, Brian S. ; Todorov, Milcho ; Mitchell, Edward A. D. ; Lara, Enrique

In: Protist, 2012, vol. 163, no. 3, p. 415-434

We used Cytochrome Oxidase Subunit 1 (COI) to assess the phylogenetic relationships and taxonomy of Nebela sensu stricto and similar taxa (Nebela group, Arcellinida) in order to clarify the taxonomic validity of morphological characters. The COI data not only successfully separated all studied morphospecies but also revealed the existence of several potential cryptic species. The taxonomic...

Université de Neuchâtel

rRNA Phylogeny of Arcellinida (Amoebozoa) Reveals that the Largest Arcellinid Genus, Difflugia Leclerc 1815, is not Monophyletic

Gomaa, Fatma ; Todorov, Milcho ; Heger, Thierry J. ; Mitchell, Edward A. D. ; Lara, Enrique

In: Protist, 2012, vol. 163, no. 3, p. 389-399

The systematics of lobose testate amoebae (Arcellinida), a diverse group of shelled free-living unicellular eukaryotes, is still mostly based on morphological criteria such as shell shape and composition. Few molecular phylogenetic studies have been performed on these organisms to date, and their phylogeny suffers from typical under-sampling artefacts, resulting in a still mostly unresolved tree....