Kangerluarsunnguaq

Collected August 2020 (PI: Nathalie Isabelle Chardon)

These data collected August 2020 (PI: Nathalie Isabelle Chardon). Please contact N. I. Chardon (nathalie.chardon_at_gmail.com) for individual quadrat (i.e. 1 m x 1 m) data, which are averaged at the 90 m spatial grid here.

COLUMN ABBREVIATIONS

Metadata for 90 m spatial grid

id: sampling zone and unique 90 m grid identifier

long: WGS84 longitude

lat: WGS84 latitude

x_stere: longitude in Polar Stereographic (EPSG 4326)

y_stere: latitude in Polar Stereographic (EPSG 4326)

date: sampling day.month.year

Species presence 1 or absence 0 at grid level

alcr: Alnus crispa

bena: Betula nana

dila: Diapensia lapponica

emni: Empetrum nigrum

hahy: Harimanella hypoides

lopr: Loiseleuria procumbens

oxpa: Oxycoccus palustre

phca: Phyllodoce caerulea

rhod: Rhododendron sp.

saar: Salix arctica

sagl: Salix glauca

sahe: Salix herbacea

vaul: Vaccinium uliginosum

drin: Dryas integrifolia

thpr: Thymus praecox

Habitat characteristics % cover

shrub: all shrub species

gram: graminoids

forb: forbs

bryo: bryophytes

lich: lichens

litt: litter

bare: bare ground

stone: stones (> 2 cm)

org: organic crust

Shrub species height (maximum vegetative height) mm and cover (estimated in 1x1 m quadrat) %

alcr_c: Alnus crispa cover

alcr_h: Alnus crispa height

bena_c: Betula nana cover

bena_h: Betula nana height

dila_c: Diapensia lapponica cover

dila_h: Diapensia lapponica height

emni_c: Empetrum nigrum cover

emni_h: Empetrum nigrum height

hahy_c: Harimanella hypoides cover

hahy_h: Harimanella hypoides height

lopr_c: Loiseleuria procumbens cover

lopr_h: Loiseleuria procumbens height

oxpa_c: Oxycoccus palustre cover

oxpa_h: Oxycoccus palustre height

phca_c: Phyllodoce caerulea cover

phca_height: Phyllodoce caerulea height

rhod_c: Rhododendron sp. cover

rhod_h: Rhododendron sp. height

saar_c: Salix arctica cover

saar_h: Salix arctica height

sagl_c: Salix glauca cover

sagl_h: Salix glauca height

sahe_c: Salix herbacea cover

sahe_h: Salix herbacea height

vaul_c: Vaccinium uliginosum cover

vaul_h: Vaccinium uliginosum height

drin_c: Dryas integrifolia cover

drin_h: Dryas integrifolia height

Community characteristics

rich_pa: shrub species richness at grid level

rich: shrub species richness averaged across 3 1x1 m sampling quadrats per grid

shan: Shannon diversity (‘vegan’ package; Oksanen et al. 2019)

comp_bena: shrub competition on Betula nana (i.e. summed cover of non-B. nana species) % cover

comp_sagl: shrub competition on Salix glauca (i.e. summed cover of non-S. glauca species) % cover

ht_cwm: maximum shrub canopy height (i.e. community weighted mean by abundance of maximum shrub height) mm

Topography and terrain wetness (calculated from)

tcws: Tasseled Cap Wetness component (Sentinal images)

slope: slope angle (MEaSUREs Greenland Ice Mapping Project Digital Elevation Model v. 1; Howat et al., 2014, 2015) º

twi: SAGA wetness index (MEaSUREs Greenland Ice Mapping Project Digital Elevation Model v. 1; Howat et al., 2014, 2015)

asp: aspect (MEaSUREs Greenland Ice Mapping Project Digital Elevation Model v. 1; Howat et al., 2014, 2015) º

Downscaled climate (time series 1984 – 2013)

insoljja: average June-August insolation MJ cm-2 yr-1

precipmam: cumulative March-May precipitation mm

tempcont: yearly maximum – minimum temperature ºC

tempmin: yearly minimum temperature ºC

precipjja: cumulative June-August precipitation mm

tempjja: average maximum June-August temperature ºC

tempmax: yearly maximum temperature ºC