Presented are the results from investigating carbon balance in forests of the transboundary Selenga river basin, based on inventory data for the status of forest reserves and he key factors (tree felling and forest fires) influencing carbon absorption and emission in forests. Analysis of the forest reserves in the Buryat and Mongolian parts of the Selenga river basin revealed distinctive features in the age structure of forests (middle-aged and young tree stands are dominant in Buryatia, and mature and overmature stands in Mongolia), and in the structure of lands of forest reserves (an increase in forest area is observed in Buryatia, whereas Mongolia shows the reverse trend). It is established that these differences are influenced by the practices of forest management and by the organization of the forest protection against fires in neighboring countries. The ROBUL technique was used to obtain estimates of carbon budget. A comparative analysis of carbon balance showed that the potential of forests of Buryatia in carbon absorption (deposition) is by a factor of 3 larger than forests of Mongolia. It is concluded that the amount and sign of carbon budget of forests growing in neighboring territories are determined by the current age structure of forests and by the intensity of destructive disturbances (carbon losses as a result of tree felling, forest fires and death of tree stands), because the carbon absorption by forests is characterized by a relative stability. The contribution from various carbon pools of the forest ecosystem to the total carbon stock and deposition (absorption) by forests is shown. Results obtained from assessing carbon budget can serve as a basis for developing the forest management and forest use strategy within the framework of transboundary cooperation of neighboring countries in order to minimize the negative effects of climate change and make effective use of its potential benefits.

中文翻译：

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色楞格河跨界流域森林碳收支对比分析

根据森林储备状况和影响森林碳吸收和排放的关键因素（砍伐和森林火灾）的清单数据，介绍了调查跨境色楞格河流域森林碳平衡的结果。对色楞格河流域布里亚特和蒙古部分森林保护区的分析表明，森林年龄结构具有鲜明的特征（布里亚特以中、幼林为主，蒙古为成熟和过熟林），森林保护区的土地结构（在布里亚特观察到森林面积增加，而蒙古则显示出相反的趋势）。已经确定，这些差异受到森林管理实践和邻国森林防火组织的影响。ROBUL 技术用于获得碳预算的估计值。碳平衡的比较分析表明，布里亚特森林在碳吸收（沉积）方面的潜力比蒙古森林大 3 倍。得出的结论是，在邻近地区生长的森林的碳收支数量和符号取决于当前森林的年龄结构和破坏性干扰的强度（由于砍伐树木、森林火灾和林分死亡造成的碳损失） )，因为森林对碳的吸收具有相对稳定的特点。显示了森林生态系统的各种碳库对森林总碳储量和沉积（吸收）的贡献。碳预算评估结果可作为制定邻国跨界合作框架内森林管理和森林利用战略的基础，以尽量减少气候变化的负面影响并有效利用其潜在利益。