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首页> 外文期刊>Biology bulletin >Trophic Role of the Moose (Alces alces L.) Population and Its Effect on the Nitrogen and Carbon Cycles in a Southern Taiga Spruce-Birch Forest
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Trophic Role of the Moose (Alces alces L.) Population and Its Effect on the Nitrogen and Carbon Cycles in a Southern Taiga Spruce-Birch Forest

机译：Trophic Role of the Moose (Alces alces L.) Population and Its Effect on the Nitrogen and Carbon Cycles in a Southern Taiga Spruce-Birch Forest

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摘要

The results of a two-year study conducted to assess the outcomes of a long-term forest isolation experiment are presented. A section of a spruce-birch forest in Yaroslavl oblast (6S4B, 100 years old, quality class I) was isolated from the presence of moose for 25 years. It is established that net mineralization of nitrogen compounds in the 0- to 12-cm soil horizon measured from May to October under field conditions was more intense in the unfenced area in comparison with the isolated area (15 +/- 0.4 and 10.4 +/- 0.5 g N/m(2), respectively). Carbon dioxide emissions from the soil in that same time period were lower in the unfenced area (319 +/- 47 g C/m(2)) than in the isolated area (552 +/- 82 g C/m(2)). On the isolated site, 19 mg of nitrogen is mineralized in the soil per gram of C-CO2; while on the control site, it is 47 mg of nitrogen per gram of C-CO2. In the isolated variant, the distribution of ammonium concentrations in the upper (0-4 cm) soil horizon is normal, while in the control variant, it is lognormal due to the presence of elk.

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