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CO2 exchange in the Alaskan arctic tundra: seasonal changes in the rate of photosynthesis of four species



CO2 exchange in the Alaskan arctic tundra: seasonal changes in the rate of photosynthesis of four species



Photosynthetica 9(4): 376-390



Photosynthesis studies on Carex aquatilis, Dupontia fischeri, Eriophorum angustifolium and Salix pulchra were conducted in the field during 1971 near Barrow, Alaska. The daily responses showed a high dependence on irradiance and continuous positive CO2 incorporation throughout the day for most of the season. Photosynthetic rates were generally high in all species, and maximum rates were between 16 and 25 mg CO2/dm2 h. Rates were high even at temperatures as low as 0 deg C.

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Accession: 000306714

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