Long-Term Response of Plants at Barrow and Atqasuk to ITEX Warming Experiments
Robert D. Hollister, Patrick J. Webber , Steven P. Rewa, and Craig E. Tweedie
Task 1:
Describe the microclimate at the plot level for each site for each year.
The abiotic measures collected at each site (Figure E) are used to dissect the role of temperature from the plant's response in the total environmental complex. There are clear temperature differences between Barrow and Atqasuk and control and OTC plots (Figure F). The calculation of thawing degree days from snow melt (TDDsm) clearly shows variation between, sites treatments, and years (Figure G). The OTCs consistently warm the plant canopy but the magnitude of warming varies between sites and years (Figure F, Figure G).
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Abiotic Measures
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| Figure E - The abiotic measures collected at all MSU operated ITEX sites and a photograph of some of the microclimate recording devices at each MSU ITEX site. | |
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| Figure F. The average July temperature in 2000 at standard screen height, within the plant canopy, and below ground for both control and OTC plots at all four MSU ITEX sites. | Figure G - Average sum of thawing degree days from snow melt (TDDsm) to August 15 for each site each year. TDDsm was calculated for each plot for which data was available, when no plot data was available TDDsm was estimated from standard screen height data (error bars-range; red-OTC; blue-control). |