Carbon budget of oligotrophic mire sites in the Southern Taiga of Western Siberia
Carbon budget of oligotrophic mire sites in the Southern Taiga of Western Siberia
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DOI：
10.1007/s11104-008-9842-7
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发表时间：
2009-02
期刊：
影响因子：
4.9
通讯作者：
E. Golovatskaya;E. Dyukarev
中科院分区：
文献类型：
--
作者：
E. Golovatskaya;E. Dyukarev
介绍了西西伯利亚南部针叶林贫营养泥沼表面植被生产力和二氧化碳 (CO2) 排放量的长期（1999-2007）调查结果。研究的生态系统包括松树-灌木-泥炭藓群落（PSS）、类似的低矮乔木群落（LPSS）和莎草-泥炭藓群落（SSF）。 PSS、LPSS 和 SSF 的净初级产量分别为 552、575 和 561 g m−2yr−1。通过室法测定的无雪季节 PSS、LPSS 和 SSF 的平均呼吸量分别为 165.8、105.6、112.4 mgCO2m−2h−1。 NPP 和 CO2 排放的现场测量结合甲烷排放、冬季 CO2 和 CH4 排放以及河流径流碳输出的参考数据，用于制定泥沼生态系统的总体碳预算。目前，所研究的沼泽生态系统是大气碳的净汇并积累泥炭。对于 PSS、LPSS 和 SSF 群落，实际现代碳积累率等于 21、112 和 102 g C m−2yr−1。
The results of a long-term (1999–2007) investigation of vegetation productivity and carbon dioxide (CO2) emission from the surface of an oligotrophic mire in southern taiga in Western Siberia are presented. The studied ecosystems include pine—shrub—sphagnum (PSS) community, a similar community with oppressed (low) tree stand (LPSS), and sedge—sphagnum fen (SSF). Net primary production for PSS, LPSS and SSF are equal to 552, 575, and 561 g m−2yr−1. The mean respiration during the snow-free season determined by chamber method is 165.8, 105.6, 112.4 mgCO2m−2h−1for PSS, LPSS and SSF, respectively. Field measurements of NPP and CO2emission in combination with reference data on methane emission, winter CO2and CH4emissions and carbon export by river run–off were used to develop an overall carbon budget of the mire ecosystems. At present conditions the studied mire ecosystems are net sinks for atmospheric carbon and accumulate peat. Rates of the actual modern carbon accumulation are equal to 21, 112 and 102 g C m−2yr−1for PSS, LPSS and SSF communities.