Mukhortova L V, Kirdianov A V, Myglan V S, Guggenberger G
Izv Akad Nauk Ser Biol. 2009 Jan-Feb(1):70-8.
Changes in the composition of wood organic matter in dead-standing spruce and larch trees depending on the period after their death have been studied in the north of Central Siberia. The period after tree death has been estimated by means of cross-dating. The results show that changes in the composition of wood organic matter in 63% of cases are contingent on tree species. Wood decomposition in dead-standing trees is accompanied by an increase in the contents of alkali-soluble organic compounds. Lignin oxidation in larch begins approximately 80 years after tree death, whereas its transformation in spruce begins not earlier than after 100 years. In the forest-tundra of Central Siberia, the rate of wood organic matter transformation in dead-standing trees is one to two orders of magnitude lower than in fallen wood, which accounts for their role as a long-term store of carbon and mineral elements in these ecosystems.
在西伯利亚中部北部，研究了死亡后立着的云杉和落叶松树木中木材有机质组成随死亡后时间的变化。通过交叉定年法估算树木死亡后的时间。结果表明，63% 的情况下木材有机质组成的变化取决于树种。死亡立木中的木材分解伴随着碱溶性有机化合物含量的增加。落叶松中木质素氧化在树木死亡后约80年开始，而云杉中木质素的转化不早于100年后开始。在西伯利亚中部的森林冻原中，死亡立木中木材有机质的转化速率比倒木低一到两个数量级，这解释了它们在这些生态系统中作为碳和矿物元素长期储存库的作用。
