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Components of carbon dioxide gas exchange in tundra plants at various temperatures

, : Components of carbon dioxide gas exchange in tundra plants at various temperatures. Botanicheskii Zhurnal (St Petersburg) 71(8): 1067-1073

Carbon dioxide exchange was studied in 8 tundra species (Betula nana, Arctous alpina, Dryas octopetala, Salix reticulata, Oxytropis sordida, Solidago lapponica, Poa alpina and Oxyria digyna) at various temperatures, and light and oxygen concentrations. Liberation of CO2 was found to increase at higher temperatures. Photosynthesis decreased due to the suppression of the photosynthetic mechanism by oxygen. The CO2 compensation point was lower in tundra plants than in plants from other areas.


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