Distribution of the erect shrub Salix richardsonii at its northern range of distribution on Bylot Island, Nunavut

1) Transects: Transects (n=20) were extended perpendicular to three alluvial fans at distances measured from the apex of the cones away from the slopes (0, 100, 200, 400, 1000 and 2000 meters) where low to high density shrub populations were found. Transects were divided in homogeneous zones of vegetation where measurements of soil cover (vegetation and abiotic), environmental factors (active layer depth, humidity, temperature) and shrub characteristics (height, density, surface) were taken. The topography of each transect was also mapped with high precision GPS (Trimble R8 GNSS System). 2) Plots: Plots (n=54) were set along a gradient of abundance of Salix richardsonii populations linked to the alluvial fans. Additional measurements of shrubs and environmental conditions were taken including, maximum diameter, shoot density, nutrient content in leaves, vegetation diversity, and soil texture, profile, pH and organic content. 3) Loggers: Twenty pairs of temperature and humidity loggers were deployed in the soil at different depths beside plots as described above. Loggers were set in active zones affected by alluvial fan running water and associated to populations of Salix richardsonii and in adjacent inactive zones with no shrub population. 4) Shrub growth: In order to assess shrub minimal age and growth, two branches from 30 individuals were collected in two separated populations associated to alluvial fans. Standard dendrochronological analyses are in progress.

Identifier
Source https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=12516
Metadata Access http://www.polardata.ca/oai/provider?verb=GetRecord&metadataPrefix=fgdc&identifier=12516_fgdc
Provenance
Creator Lévesque, Esther; Tremblay, Maxime; Bisson, Ariane; Fortier, Daniel
Publisher Canadian Cryospheric Information Network
Contributor Polar Data Catalogue
Publication Year 2015
Rights Research programs, CCIN, or ArcticNet take no liability for the use or transmission of this data
OpenAccess true
Contact maxime.tremblay2(at)uqtr.ca; pdc(at)uwaterloo.ca
Representation
Language English
Format Computer file
Discipline Ecology
Spatial Coverage (-80.000W, 73.000S, -80.000E, 73.000N)
Temporal Coverage Begin 2014-06-10T00:00:00Z
Temporal Coverage End 2015-07-10T00:00:00Z