Study ID 492

ITEX Dataset 14 - Toolik (LTER Heath, LTER Moist acidic tussock, LTER non-acidic tussock, LTER wet sedge, SAG wet sedge2, Tussock 1981 plots)

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Realm: Terrestrial
Climate: Polar
Biome: Tundra
Central latitude: 68.629500
Central longitude: -149.578000
Duration: 13 years, from 1982 to 2006

797 records

30 distinct species

Across the time series Unknown moss is the most frequently occurring species

Citation(s):

Elmendorf, S.C. (2012) Global Tundra Vegetation Change –30 years of plant abundance data from unmanipulated and experimentally-warmed plots. Available at: http://www.polardata.ca, accessed 2017. CCIN reference number 10786.Elmendorf, S.C., Henry, G.H., Hollister, R.D., Björk, R.G., Bjorkman, A.D., Callaghan, T.V., Collier, L.S., Cooper, E.J., Cornelissen, J.H. & Day, T.A. (2012a) Global assessment of experimental climate warming on tundra vegetation: heterogeneity over space and time. Ecology letters, 15, 164–175.Elmendorf, S.C., Henry, G.H., Hollister, R.D., Björk, R.G., Boulanger-Lapointe, N., Cooper, E.J., Cornelissen, J.H., Day, T.A., Dorrepaal, E. & Elumeeva, T.G. (2012b) Plot-scale evidence of tundra vegetation change and links to recent summer warming. Nature Climate Change, 2, 453–457.Elmendorf, S.C., Henry, G.H., Hollister, R.D., Fosaa, A.M., Gould, W.A., Hermanutz, L., Hofgaard, A., Jónsdóttir, I.S., Jorgenson, J.C. & Lévesque, E. (2015) Experiment, monitoring, and gradient methods used to infer climate change effects on plant communities yield consistent patterns. Proceedings of the National Academy of Sciences, 112, 448–452.

Methods

1. Plot size was normally 5x20m for controland fertilized plots and 3x5 m for warmed plots. Warming was achieved by use of plastic-covered greenhouses during the summer. All aboveground biomass plus belowground stems and rhizomes were clipped in 20x20 cm quadrats. Normally, 4 or 5 quadrats were randomly located along line transects in each of four replicate plots blocks for each site and treatment.Plots were arrayed in blocks with one plot of each treatment per block. All biomass was sorted by functional type, growth form, and species, then dried and weighed. Details are given in several publications, e.g.Chapin et al. (1995; Ecology 76:694-711).2. Not all species were separated in all years of harvest, and years of harvest varied among sites. Where data are missing there is no value given in the data set. When species were not separated individually, they were lumped by functional type3. Long term climate records (since 1988) and descriptions of stations are available on the Arctic LTER and Toolik Field Station web sites (http://ecosystems.mbl.edu/arc/and http://toolik.alaska.edu/edc/. The station meets LTER Network Class Istandards. There are no observations of start/end of growing season. Missing data are not gap-filled.5. LAT, LONG and ELEV of theclimate station are: 68 deg 36' N, 149 deg 36'W, 745m asl.