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Université de Fribourg

Biological Flora of the British Isles: Ambrosia artemisiifolia

Essl, Franz ; Biró, Krisztina ; Brandes, Dietmar ; Broennimann, Olivier ; Bullock, James M. ; Chapman, Daniel S. ; Chauvel, Bruno ; Dullinger, Stefan ; Fumanal, Boris ; Guisan, Antoine ; Karrer, Gerhard ; Kazinczi, Gabriella ; Kueffer, Christoph ; Laitung, Beryl ; Lavoie, Claude ; Leitner, Michael ; Mang, Thomas ; Moser, Dietmar ; Müller-Schärer, Heinz ; Petitpierre, Blaise ; Richter, Robert ; Schaffner, Urs ; Smith, Matt ; Starfinger, Uwe ; Vautard, Robert ; Vogl, Gero ; Lippe, Moritz von der ; Follak, Swen

In: Journal of Ecology, 2015, vol. 103, no. 4, p. 1069–1098

This account presents information on all aspects of the biology of Ambrosia artemisiifolia L. (Common ragweed) that are relevant to understanding its ecology. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral...

Université de Neuchâtel

Rediscovery of Nebela ansata (Amoebozoa: Arcellinida) in eastern North America: biogeographical implications

Heger, Thierry J. ; Booth, Robert K. ; Sullivan, Maura E. ; Wilkinson, David M. ; Warner, Barry G. ; Asada, Taro ; Mazei, Yuri ; Meisterfeld, Ralf ; Mitchell, Edward A. D.

In: Journal of Biogeography, 2011, vol. 38, no. 10, p. 1897-1906

Aim The question whether free-living protists are generally cosmopolitan is currently a matter of debate. In this study we investigate the geographical distribution of a distinctive testate amoeba species, Nebela ansata, and use our data to assess the potential for highly restricted distribution patterns in some protist species. Location Global. ...

Université de Neuchâtel

Inferring reciprocal evolutionary histories in associated species of plants and insects in two european pollination systems

Espíndola, María Anahí ; Alvarez, Nadir (Dir.) ; Rahier, Martine (Codir.) ; Carstens, Bryan C. (Codir.) ; Després, Laurence (Codir.) ; Gibernau, Marc (Codir.) ; Gugerli, Felix (Codir.) ; Küpfer, Philippe (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2010.

Coevolution is defined as reciprocal evolutionary changes that might arise at any spatiotemporal scale. Despite every organism on Earth undergoes coevolutionary interactions, cases of one-to-one specific relationships are generally rare. However, because of the reduced number of interacting species they concern, these species-specific associations are interesting to evolutionary biologists...

Université de Neuchâtel

Worldwide biogeography and systematics of Sapindaceae : a molecular and taxonomic survey combining large data sets and novel methodological approaches

Bürki, Sven ; Küpfer, Philippe (Dir.) ; Alvarez, Nadir (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2009 ; Th. 2089.

La famille des Sapindaceae est importante d’un point de vue économique et comprend plus de 1900 espèces (distribuées dans approximativement 140 genres; par exemple Litchi, Paullinia), majoritairement distribuées en zone tropicale. Cependant, certains genres peuvent coloniser les zones tempérées. Depuis plus d’un siècle, la définition de cette famille (plus particulièrement la...

Université de Neuchâtel

Relationships among Testate Amoebae (Protozoa), Vegetation and Water Chemistry in Five Sphagnum-Dominated Peatlands in Europe

Mitchell, Edward A. D. ; Buttler, Alexandre ; Grosvernier, Philippe ; Rydin, HÅkan ; Albinsson, C. ; Greenup, A. L. ; Heijmans, Monique M. P. D. ; Hoosbeek, Marcel R. ; Saarinen, Timo

In: New Phytologist, 2000, vol. 145, no. 1, p. 95-106

To study the relationships between groups of organisms and the degree to which these relationships are consistent across major climatic gradients, we analysed the testate amoeba (Protozoa) communities, vegetation and water chemistry of one peatland in five countries: Switzerland, The Netherlands, Great Britain, Sweden and Finland, as part of the BERI (Bog Ecosystem Research Initiative)...

Université de Neuchâtel

The curse of taxonomic uncertainty in biogeographical studies of free-living terrestrial protists: a case study of testate amoebae from Amsterdam Island

Heger, Thierry J. ; Mitchell, Edward A. D. ; Ledeganck, P. ; Vincke, S. ; van de Vijver, B. ; Beyens, L.

In: Journal of Biogeography, 2009, vol. 36, no. 8, p. 1551-1560

Aim A current debate in microbial biogeography contrasts two views concerning the distribution of free-living microorganisms. The first view assumes a ubiquitous distribution, while the second assumes that at least some species have limited geographical distributions. We tested for limited geographical distributions by identifying testate amoebae morphospecies from an extremely remote...