Abstract—

To assess carbon dioxide exchange in the ecosystem of cowberry–lichen pine forest, 8790 eddy covariance measurements were made during the summer–autumn period. The annual cycle of CO₂ fluxes between forest and atmosphere was reconstructed using regression equations. The total net CO₂ exchange, gross photosynthesis, and ecosystem respiration in the pine forest were estimated at −103, −407, and 304 g C m^–2 year^–1, respectively. Total evapotranspiration in June to September was 98 mm, and the efficiency of water utilization for gross photosynthesis varied about 2–3 g C kg^–1 Н₂О. A close correlation was revealed between the daily average values of gross photosynthesis and total evaporation over the forest canopy. The rates of net ecosystem CO₂ exchange and evapotranspiration in the cowberry–lichen pine forest proved to be significantly lower than in a spruce forest of the East European taiga zone, which confirms the hypothesis that the structure of forest cover has an effect on the parameters of energy and mass exchange at the surface layer of the atmosphere.

中文翻译：

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东欧中针叶林亚区越橘-地衣松林中二氧化碳和水的生态系统交换

摘要-

为了评估越橘-地衣松林生态系统中的二氧化碳交换，在夏秋期间进行了 8790 次涡度协方差测量。使用回归方程重建了森林和大气之间CO ₂通量的年度循环。松林中总的净 CO ₂交换、总光合作用和生态系统呼吸估计分别为 -103、-407 和 304 g C m ^–2 year ^–1。6 月至 9 月的总蒸发量为 98 mm，总光合作用的水分利用效率变化约为 2-3 g C kg ^–1 Н ₂О。总光合作用的日平均值与森林冠层的总蒸发量之间显示出密切的相关性。越橘-地衣松林的净生态系统 CO ₂交换率和蒸散率显着低于东欧针叶林区的云杉林，这证实了森林覆盖结构对参数有影响的假设大气表层的能量和物质交换。