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Journal Article

Carbon Dioxide Flux from Tundra Soils and Vegetation as Related to Temperature at Barrow, Alaska

K. M. Peterson and W. D. Billings
The American Midland Naturalist
Vol. 94, No. 1 (Jul., 1975), pp. 88-98
DOI: 10.2307/2424540
Stable URL: http://www.jstor.org/stable/2424540
Page Count: 11
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Carbon Dioxide Flux from Tundra Soils and Vegetation as Related to Temperature at Barrow, Alaska
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Abstract

Measurements of total CO2 flux from a vegetated tundra surface using a dark chamber approach have shown diurnal patterns which are correlated linearly with soil temperature. Evidence is presented for the importance of microsite differences and seasonality in total dark CO2 flux from tundra soils and vegetation. The relative contributions of aboveground and belowground CO2 sources to the total dark CO2 flux from tundra soils and vegetation are estimated at between 36 and 46% for the aboveground contribution and between 54 and 64% for the belowground contribution on a polygon meadow during late June. Contributions of root respiration to total dark CO2 flux from wet tundra are likely to be overestimated if based entirely on controlled laboratory measurements now available.

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