Hudson, James M G; Henry, Gregory HR (2010): (Table 1) Effects of experimental warming on plant cover and diversity indices in an evergreen shrub at Alexandra Fiord [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.811359, Supplement to: Hudson, JMG; Henry, GHR (2010): High Arctic plant community resists 15 years of experimental warming. Journal of Ecology, 98(5), 1035-1041, https://doi.org/10.1111/j.1365-2745.2010.01690.x
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Abstract:
1. Identifying plant communities that are resistant to climate change will be critical for developing accurate, wide-scale vegetation change predictions. Most northern plant communities, especially tundra, have shown strong responses to experimental and observed warming.
2. Experimental warming is a key tool for understanding vegetation responses to climate change. We used open-top chambers to passively warm an evergreen-shrub heath by 1.0-1.3 °C for 15 years at Alexandra Fiord, Nunavut, Canada (79 °N). In 1996, 2000 and 2007, we measured height, plant composition and abundance with a point-intercept method.
3. Experimental warming did not strongly affect vascular plant cover, canopy height or species diversity, but it did increase bryophyte cover by 6.3% and decrease lichen cover by 3.5%. Temporal changes in plant cover were more frequent and of greater magnitude than changes due to experimental warming.
4. Synthesis. This evergreen-shrub heath continues to exhibit community-level resistance to long-term experimental warming, in contrast to most Arctic plant communities. Our findings support the view that only substantial climatic changes will alter unproductive ecosystems.
Project(s):
Coverage:
Latitude: 78.883300 * Longitude: -75.916700
Date/Time Start: 1996-01-01T00:00:00 * Date/Time End: 2007-01-01T00:00:00
Event(s):
Alexandra_Fiord_sites * Latitude: 78.883300 * Longitude: -75.916700 * Location: Ellesmere Island, Canadian Arctic Archipelago * Method/Device: Sampling by hand (HAND)
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Geocode | |||
| 2 | Treatment | Treat | Hudson, James M G | |||
| 3 | Dissimilarity index | DISS | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | Bray-Curtis | |
| 4 | Dissimilarity, standard deviation | DISS std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | |
| 5 | Shrubs | Shrubs | % | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | evergreen |
| 6 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | shrubs evergreen |
| 7 | Bryophyta | Bryophyta | % | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | |
| 8 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | bryophyta |
| 9 | Lichen | Lichen | % | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | |
| 10 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | lichen |
| 11 | Shrubs | Shrubs | % | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | deciduous |
| 12 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | shrubs deciduous |
| 13 | Grass and sedges | Grass+sedges | % | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | graminoids |
| 14 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | graminoids |
| 15 | Forbs | Forbs | % | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | |
| 16 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | forbs |
| 17 | Shannon Diversity Index | H' | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | ||
| 18 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | H(S) index |
| 19 | Simpson index of diversity | Simpson I | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | ||
| 20 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | Simpson's index |
| 21 | Species richness | S | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | ||
| 22 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | species richness |
| 23 | Evenness of species | E | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | Pielou's | |
| 24 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | evenness |
| 25 | Height | Height | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | canopy height, unit uncertain [cm?] | |
| 26 | Standard deviation | Std dev | ± | Hudson, James M G | Open-top chamber (OTC) warming experiment, in situ | canopy height |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
146 data points