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为了认识和明确五环三萜类的降解产物——脱-A-三萜烯的气候及生态响应,应用GC-MS技术对东北长白山哈尼泥炭样品进行了分析与研究.结果表明,在泥炭中存在丰富的脂肪族脱-A-三萜烯化合物.高的总脱-A-三萜烯量主要出现于全新世时段,对应低的沉积速率,其积累机制与以往研究并不完全一致,提出生物群落构成类型也是影响因素之一.总脱-A-三萜烯量在整个序列中显著的阶段性变化主要是对不同生物(微生物和植物)过程及其作用响应的体现,可能指示了16000calaBP沼泽环境中生物群落和功能结构至少发生了4次显著的演替.在约10200,8700,7700,6600,4480～3940以及3040calaBP左右,低的总脱-A-三萜烯揭示出全新世沼泽发育的大环境下,微生境发生了千年尺度上的多次波动.脱-A-三萜二烯与脱-A-三萜一烯(DT/MT)、脱-A-羽扇烷与脱-A-三萜一烯和脱-A-三萜二烯之比[DL/(MT+DT)]及单个化合物之间的比值与总脱-A-三萜烯含量变化相反,即在末次冰消期和晚全新世晚期较高,其他时期变化稳定且低,显示了各化合物对微生境变化及微生物活动的响应不一致.该研究从微生物这一视角探讨了沼泽环境发育的物种群落的多样性演变及生物功能组成对微生境的响应,不仅为以往研究提供了很好的补充材料,而且也为该系列化合物今后在生态环境方面的应用提供了重要信息.
In order to understand and clarify the climatic and ecological responses of pentacyclic triterpenes-de-A-triterpenes, GC-MS was used to analyze and study the Hani peat samples from Changbai Mountain in Northeast China.The results showed that in peat There is abundant aliphatic de-A-triterpene compounds.The total amount of total A-triterpenes is mainly in the Holocene period, corresponding to the low deposition rate, the accumulation mechanism is not consistent with the previous studies, put forward The biofacies composition type is also one of the influencing factors.The significant stepwise changes in the total amount of total -A-triterpenes throughout the sequence are mainly indicative of the response of different organisms (microorganisms and plants) process and their effects, which may indicate 16000calaBP At least 4 significant successions occurred in the biomes and functional structures in the marsh environment. The low total a-A-triterpenes at about 10200, 8700, 7700, 6600, 4480-3940 and 3040 cala BP revealed the Holocene Swamp Under the developmental environment, the micro-habitat fluctuated on a thousand-year scale.Down-A-triterpenes and de-A-triterpenoids (DT / MT) A-triterpenoid and des-A-terpenoid ratio [DL / (MT + DT)] and a single compound Is inversely proportional to the change of total A-triterpene content, that is, it is relatively high in the Last Icefall and the Late Late Holocene, but stable and low in other periods, indicating the effect of each compound on microbial changes and microbial activities In response to inconsistency, this study explored the evolution of species diversity and the response of biofunctional composition to micro-habitats in a marsh environment from the perspective of micro-organisms, which not only provided good supplementary materials for previous studies but also provided valuable information for this series of compounds Future applications in the ecological environment provide important information.