Table 1.

Description and location of the datasets plant functional traits and associated data from an ITEX warming experiment and two elevation gradients, with and without marine nutrient input from nesting seabirds, near Longyearbyen, Svalbard.

Dataset	Response variable	Number of data points in ITEXa, gradientsb	Number of taxa in ITEXa, gradientsb	Temporal range in ITEXa, gradientsb	Citation information for raw data, clean data, and code
i	Plant community composition	1,273a 689b	26 vascular plants, 1 fungus, 8 lichens, 22 bryophytesa 50 vascular plantsb	2003, 2009, 2015a 2018b	Raw data66, clean data66, code67
ii	Vegetation structure and height	61a 756b		2003; 2009, 2015a 2018b	Raw data66, clean data66, code67
iii	Vascular plant and bryophyte traits	5,339a 11,345b (10,297 vascular plants; 1048 bryophytes)	19 vascular plantsa 31 vascular plants, 19 bryophytesb	2018a,b	Raw data66, clean data66, code67
vi	Soil carbon and nitrogen	70b		2022b	Raw data66, clean data66, code67
v	Ecosystem CO2 fluxes	raw flux measurements 129a 59b		2018a,b	Raw data66, clean data66 code5
vi	Remote sensing	7 sites, 28,500 (x5) individual multispectral images; 340 leaf spectroscopy readings, 117 ground-truthing pointsa,b	18 species of moss, graminoid, and dwarf shruba,b	2018a,b	Clean data66
vii	Climate data	station: 815,339a loggers: 937,388a 162b		station: 2015–2018a loggers: 2004–2005; and 2015–2018a 2018b	Raw data66, clean data66, code67

This table summarizes information on dataset number, response variable(s), number of observations, taxa, the data’s temporal range, location of the primary data, the final published data, and the code for extracting and cleaning data from the primary data. The superscript letters refer to ^aITEX warming experiment, ^bGradients, Note: The ITEX climate data consists of two data tables; one for the climate station, one for climate logger data.