Time filter

Source Type

Estavayer-le-Lac, Switzerland

Theurillat J.-P.,Center Alpien Of Phytogeographie | Theurillat J.-P.,University of Geneva | Mucina L.,University of Western Australia | Mucina L.,Stellenbosch University | And 2 more authors.
Lazaroa | Year: 2015

This paper presents the validation of five syntaxonomic concepts-two orders (Callitricho hamulatae-Ranunculetalia aquatilis, Zannichellietalia pedicellatae) and three alliances (Ranunculion aquatilis, Nelumbion nuciferae and Caricion viridulo-trinervis).

Di Pietro R.,University of Rome La Sapienza | Theurillat J.-P.,Center Alpien Of Phytogeographie | Theurillat J.-P.,University of Geneva | Capelo J.,Instituto Nacional Of Investigacao Agraria E Veterinaria | And 8 more authors.
Lazaroa | Year: 2015

We present descriptions of a new order (Ranunculo cortusifolii-Geranietalia reuteri) and of a new alliance (Stachyo lusitanicae-Cheirolophion sempervirentis) for the herbaceous fringe communities of Macaronesia and of the southwestern Iberian Peninsula, respectively. A new alliance, the Polygalo mediterraneae-Bromion erecti (mesophilous post-cultural grasslands), was introduced for the Peninsular Italy. We further validate and typify the Armerietalia rumelicae (perennial grasslands supported by nutrient-poor soils on siliceous bedrocks at elevations characterized by the submediterranean climate of south-central Balkan Peninsula), the Securigero-Dasypyrion villosae (lawn and fallow-land tall-grass annual vegetation of Italy), and the Cirsio vallis-demoni-Nardion (acidophilus grasslands on siliceous substrates of the Southern Italy). Nomenclatural issues (validity, legitimacy, synonymy, formal corrections) have been discussed and clarified for the following names: Brachypodio-Brometalia, Bromo pannonici-Festucion csikhegyensis, Corynephoro-Plantaginion radicatae, Heleochloion, Hieracio-Plantaginion radicatae, Nardetea strictae, Nardetalia strictae, Nardo-Callunetea, Nardo-Galion saxatilis, Oligo-Bromion, Paspalo-Heleochloetalia, Plantagini-Corynephorion and Scorzoneret alia villosae.

Gottfried M.,University of Vienna | Pauli H.,Slovak Academy of Sciences | Futschik A.,University of Vienna | Akhalkatsi M.,Ilia State University | And 30 more authors.
Nature Climate Change | Year: 2012

Climate impact studies have indicated ecological fingerprints of recent global warming across a wide range of habitats. Although these studies have shown responses from various local case studies, a coherent large-scale account on temperature-driven changes of biotic communities has been lacking. Here we use 867 vegetation samples above the treeline from 60 summit sites in all major European mountain systems to show that ongoing climate change gradually transforms mountain plant communities. We provide evidence that the more cold-adapted species decline and the more warm-adapted species increase, a process described here as thermophilization. At the scale of individual mountains this general trend may not be apparent, but at the larger, continental scale we observed a significantly higher abundance of thermophilic species in 2008, compared with 2001. Thermophilization of mountain plant communities mirrors the degree of recent warming and is more pronounced in areas where the temperature increase has been higher. In view of the projected climate change the observed transformation suggests a progressive decline of cold mountain habitats and their biota. © 2012 Macmillan Publishers Limited. All rights reserved.

Belonovskaya E.A.,Russian Academy of Sciences | Mucina L.,University of Western Australia | Theurillat J.-P.,Center Alpien Of Phytogeographie | Theurillat J.-P.,University of Geneva
Hacquetia | Year: 2014

We present description of a new class for the high-altitude screes of the Caucasus (the Lamio tomentosi-Chaerophylletea humilis) and two alliances such as the Scrophulario minimae-Symphyolomion graveolentis (Chaerophylletalia humilis, Lamio tomentosi-Chaerophylletea humilis) and the Scrophulario variegatae-Epilobion dodonaei (Epilobietalia fleischeri, Thlaspietea rotundifolii). © by Ladislav Mucina 2014.

Heger T.J.,University of British Columbia | Derungs N.,University of Neuchatel | Theurillat J.P.,Center Alpien Of Phytogeographie | Theurillat J.P.,University of Geneva | Mitchell E.A.D.,University of Neuchatel
Microbial Ecology | Year: 2015

Most groups of higher organisms show a decrease in species richness toward high altitude, but the existence of such a pattern is debated for micro-eukaryotes. Existing data are scarce and mostly confounded with the diversity of habitats that also decreases with elevation. In order to disentangle these two factors, one approach is to consider only similar types of habitats occurring across an elevational gradient. We assessed the diversity and community structure of testate amoebae in two specific habitats: (1) natural Calluna vulgaris litter and (2) Minuartia sedoides cushions 7 years after their transplantation along a vertical transect from 1770 to 2430 m in the subalpine and alpine zones of the Swiss Alps. Analyses of co-variance and variance showed that testate amoeba species richness, equitability, and diversity declined with elevation and were significantly correlated to habitat type. In a redundancy analysis, the variation in the relative abundance of the testate amoeba taxa in Calluna vulgaris litter was equally explained by elevation and litter pH. This is the first study documenting a monotonic decrease of protist diversity in similar habitats across an elevational gradient. © 2015 Springer Science+Business Media New York

Discover hidden collaborations