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Université de Fribourg

Ecophylogenetics: advances and perspectives

Mouquet, Nicolas ; Devictor, Vincent ; Meynard, Christine N. ; Munoz, Francois ; Bersier, Louis-Félix ; Chave, Jérôme ; Couteron, Pierre ; Dalecky, Ambroise ; Fontaine, Colin ; Gravel, Dominique ; Hardy, Olivier J. ; Jabot, Franck ; Lavergne, Sébastien ; Leibold, Mathew ; Mouillot, David ; Münkemüller, Tamara ; Pavoine, Sandrine ; Prinzing, Andreas ; Rodrigues, Ana S. L. ; Rohr, Rudolf P. ; Thébault, Elisa ; Thuiller, Wilfried

In: Biologial Review, 2012, vol. 87, no. 4, p. 769-785

Ecophylogenetics can be viewed as an emerging fusion of ecology, biogeography and macroevolution. This new and fast-growing field is promoting the incorporation of evolution and historical contingencies into the ecological research agenda through the widespread use of phylogenetic data. Including phylogeny into ecological thinking represents an opportunity for biologists from different fields...

Université de Fribourg

Converging seasonal prevalence dynamics in experimental epidemics

Lass, Sandra ; Hottinger, Jürgen W. ; Fabbro, Thomas ; Ebert, Dieter

In: BMC Ecology, 2011, vol. 11, p. 14

Background Regular seasonal changes in prevalence of infectious diseases are often observed in nature, but the mechanisms are rarely understood. Empirical tests aiming at a better understanding of seasonal prevalence patterns are not feasible for most diseases and thus are widely lacking. Here, we set out to study experimentally the seasonal prevalence in an aquatic host-parasite system. The...

Université de Fribourg

Historical sampling reveals dramatic demographic changes in western gorilla populations

Thalmann, Olaf ; Wegmann, Daniel ; Spitzner, Marie ; Arandjelovic, Mimi ; Guschanski, Katerina ; Leuenberger, Christoph ; Bergl, Richard A ; Vigilant, Linda

In: BMC Evolutionary Biology, 2011, vol. 11, p. 85

Background: Today many large mammals live in small, fragmented populations, but it is often unclear whether this subdivision is the result of long-term or recent events. Demographic modeling using genetic data can estimate changes in long-term population sizes while temporal sampling provides a way to compare genetic variation present today with that sampled in the past. In order to better...

Université de Fribourg

Nurse plants, tree saplings and grazing pressure: changes in facilitation along a biotic environmental gradient

Smit, Christian ; Vandenberghe, Charlotte ; Ouden, Jan den ; Müller-Schärer, Heinz

In: Oecologia, 2007, vol. 152, no. 2, p. 265-273

Current conceptual models predict that an increase in stress shifts interactions between plants from competitive to facilitative; hence, facilitation is expected to gain in ecological importance with increasing stress. Little is known about how facilitative interactions between plants change with increasing biotic stress, such as that incurred by consumer pressure or herbivory (i.e....

Université de Fribourg

Winter weather affects asp viper Vipera aspis population dynamics through susceptible juveniles

Altwegg, Res ; Dummermuth, Stefan ; Anholt, Bradley R. ; Flatt, Thomas

In: Oikos, 2005, vol. 110, no. 1, p. 55-66

Detailed studies on mammals and birds have shown that the effects of climate variation on population dynamics often depend on population composition, because weather affects different subsets of a population differently. It is presently unknown whether this is also true for ectothermic animals such as reptiles. Here we show such an interaction between weather and demography for an ectothermic...