Study ID 485

ITEX Dataset 7 - Akureyri (GA66, MD72, SB63, SY59), Blonduos (SD33, SD34), Dalsmynni (AG4, KD24, KD25), Hjardarland (LH92, SH90), Holtavorduheidi (AH37, AH38, VH49), Modruvellir (LH69, MV51, MV52), Oxnadalsheidi (SA16, SA17, SA19) and Thykkvibaer (HH100, RT81, VE82)

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Realm: Terrestrial
Climate: Temperate
Biome: Boreal forests/Taiga
Central latitude: 64.853559
Central longitude: -19.675504
Duration: 3 years, from 1997 to 2005

6325 records

128 distinct species

Across the time series 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

Vegetation 1. Braun-Blanquet scale. 2. Cover % (cover class midpoints) 3. Plot size: (50 x 50 cm = 0.25 m2) 4. Approx subsite area (30 m x 50 cm = 15 m2) 5. Cryptogams were not identifiied in the study, only total Moss and lichen cover. 6. Control (no warming treatment) Climate: 1. Standard equipment and methodology from the Icelandic Met Office, data is from their long term stations. For the Dalsmynni station we provide data for the period 1997-2005, ATM, ATMX, AT and Precip. 2: 3: Start of growing season was not determined. 4: Precip data missing from Nov. 2003. 5. LAT, LONG and ELEV for climate station if different from subsite location, using same format as below LAT = 65.658 LONG = -20,2925 ELEV = 8 m a.s.l. Permanent plots for long-temer monitoring of vegetation were set up in pastures in the lowlands and highlands of Iceland in 1997-1998. The plots were resampled in 2005. Analysis of the data showed that a considerable improvement in pasture condition had in general occurred. Grazing pressure had declined, sward height increased, extent of bare ground declined, cover of vascular plants increased and cover of crytogams declined. Overall vegetation change was from a heathland towards a grassland. The vegetation change was related to declining livestock numbers and grazing pressure, but not the less to a warming climatic trend during the period.