188 research outputs found
Soil temperature series in Vallon de Nant catchment, Switzerland
No full textSoil temperature has been recorded continuously at 4 sites in the Vallon de Nant, Switzerland, from July 21st, 2009 to November 16th, 2018. The elevation of the sites ranges between 1240 and 2640 m asl.
All plots are on calcareous bedrock. Dominant species are:
T1: montane forest dominated by Fagus sylvatica and Abies alba in overstorey, Sanicula europaea and Oxalis acetosella in understorey.
T2: mesohygrophilous, subalpine pasture dominated by Carex ferruginea and Alchemilla vulgaris.
T3: lower alpine, mesophilous grassland, dominated by Festuca melanopsis, Sesleria caerulea and Carex ferruginea.
T4: upper alpine grassland, dominaed by Salix herbacea, Salix retusa and Polygonum viviparum.
Measures are realized every hour using a temperature logger GeoPrecision M-Log5W (GeoPrecision GmbH, Ettlingen, Germany) with an accuracy of +/- 0.1°C @0°C. For more information see http://www.geoprecision.com/en/
Description of files:
- coordinates.csv: elevation and geographic coordinates (in WGS84 and CH1903) of the sites, start and end date of each time series and number of missing points.
- coordinates.xlsx: same file in xlsx format.
- data.csv: timeline (in dd/mm/yyy HH/MM format) and time series of temperatures (in °C) at the 4 sites.
- data.xlsx: same file in xlsx format.
- matlab_data.mat: data in MatLab format with 't' the timeline, 'data' a matrix of 4 columns with temperature data, and 'alt' and 'name' the altitude and name of the 4 points, respectively.
- soil_temperature.png: a plot of the timeseries.
- T1_1240m.jpg: picture of the site T1 in the Vallon de Nant.
- T2_1530m.jpg: picture of the site T2 in the Vallon de Nant.
- T3_2150m.jpg: picture of the site T3 in the Vallon de Nant.
- T4_2650m.jpg: picture of the site T4 in the Vallon de Nant.
Contact: Pascal Vittoz, Institute of Earth surface dynamics, University of Lausanne; [email protected]
Appendix S1: Correspondence and aggregation for Tracheophyte names
No full textThis dataset contains only the work of taxonomic attributions for tracheophytes realized by the expert Dr. Pascal Vittoz.
We concatenate, aggregate 2212 tracheophytes species observed into the rechalp area (Vaud prealp, Vaud Canton - Switzerland) into a list of 1817 sp.
Appendix from Rey et al 2023
Article Title : Linking plant and vertebrate species to Nature’s Contributions to People in the Swiss Alps
DOI : 10.1038/s41598-023-34236-2
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Biomass production of the last remaining fen with Saxifraga hirculus in Switzerland is controlled by nitrogen availability
No full textOlde Venterink H. and Vittoz P. 2008. Biomass production of the last remaining fen with Saxifraga hirculus in Switzerland is controlled by nitrogen availability. Bot. Helv. 118: 165 - 174. For conservation management of endangered plants it is important to know which nutrient(s) control growth of the vegetation, because maintenance of low nitrogen (N), phosphorus (P) or potassium (K) availability requires different management measures. The aim of this study was to determine the type of nutrient limitation for the vegetation in the last remaining site with Saxifraga hirculus in Switzerland, using nutrient ratios in the aboveground vegetation as an indicator. We made vegetation relevees, collected biomass of the vascular plants, and took soil samples in three plots at this site. The biomass was very low (152-231 g m -2), and all three plots were clearly N-limited with N:P ratios of 7- 8. Soil extractable N concentrations were generally low, and P and K concentrations were moderate to high, which was consistent with the indicated N limitation. Hence conservation management first of all needs to prevent N-enrichment, and needs to avoid increased mineralization rates through drainage, or the accumulation of N in the system from atmospheric deposition. Therefore N output seems required through for instance grazing or mowing. The current grazing management seems to function well, since total aboveground biomass is very low and S. hirculus has a high abundance in this last remnan
Seed dispersal distances: a typology based on dispersal modes and plant traits
No full textVittoz P. and Engler R. 2007. Seed dispersal distances: a typology based on dispersal modes and plant traits. Bot. Helv. 117: 109-124. The ability of plants to disperse seeds may be critical for their survival under the current constraints of landscape fragmentation and climate change. Seed dispersal distance would therefore be an important variable to include in species distribution models. Unfortunately, data on dispersal distances are scarce, and seed dispersal models only exist for some species with particular dispersal modes. To overcome this lack of knowledge, we propose a simple approach to estimate seed dispersal distances for a whole regional flora. We reviewed literature about seed dispersal in temperate regions and compiled data for dispersal distances together with information about the dispersal mode and plant traits. Based on this information, we identified seven "dispersal types” with similar dispersal distances. For each type, upper limits for the distance within which 50% and 99% of a species' seeds will disperse were estimated with the 80th percentile of the available values. These distances varied 5000-fold among the seven dispersal types, but generally less than 50-fold within the types. Thus, our dispersal types represented a large part of the variation in observed dispersal distances. The attribution of a dispersal type to a particular species only requires information that is already available in databases for most Central European species, i.e. dispersal vector (e.g. wind, animals), the precise mode of dispersal (e.g. dyszoochory, epizoochory), and species traits influencing the efficiency of dispersal (e.g. plant height, typical habitats). This typology could be extended to other regions and will make it possible to include seed dispersal in species distribution model
Fostering transdisciplinarity in addictions research training
No full textThe chapter, "Fostering transdisciplinarity in addictions research training" was written by the listed authors including Nicole Vittoz (Douglas College Faculty). "Transforming Addiction advances addictions research and treatment by promoting transdisciplinary collaboration, the integration of sex and gender, and issues of trauma and mental health. The authors demonstrate these shifts and offer a range of tools, methods, and strategies for responding to the complex factors and forces that produce and shape addiction. In addition to providing practical examples of innovation from a range of perspectives, the contributors demonstrate how addiction spans biological, social, environmental, and economic realms."--Page 4 of cover.book chapterTransdisciplinarityTrauma and mental healthAddiction (Social aspects)Addiction (Biological aspects)Addiction (Environmental aspects)Addiction (Economic aspects)Published
Les pelouses à Festuca paniculata du Tessin (Suisse) dans un contexte Alpin
No full textAbstract.: Vittoz P., Selldorf P., Eggenberg S. and Maire S. 2005. Festuca paniculata meadows in Ticino (Switzerland) and their Alpine environment. Bot. Helv. 115: 33-48. Festuca paniculata (L.) Schinz & Thellung locally dominates montane and subalpine meadows of the Alps and other mountains of southern Europe. Vegetation relevés were carried out in Switzerland and northern Italy to study the site conditions under which Festuca paniculata meadows occur in this part of the Alps, their species composition and phytosociological status, and their relationship to Festuca paniculata meadows described previously from the French Alps (Centaureo-Festucetum spadiceae) and Austrian Alps (Hypochaerido uniflorae-Festucetum paniculatae). The Swiss meadows were found to have a similar ecology to those in France and Austria. They occur mostly between 1600 and 2100 m a.s.l on steep slopes with southern aspect, generally on crystalline rocks, but sometimes on calcareous rocks if soils have been decalcified. The species composition of the Swiss meadows is closer to the Austrian than to the French communities, and we attribute them to the association Hypochaerido uniflorae-Festucetum paniculatae with the new subassociation polygaletosum chamaebuxi. Climate is probably the main factor separating vegetation units in the Alps: the Centaureo-Festucetum spadiceae occurs where summers are dry, whereas the Hypochaerido uniflorae-Festucetum paniculatae occurs where rainfall is not a limiting factor in summe
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