Vegetation plays an important role in ecosystem stability in tectonically active regions such as the eastern Tibetan Plateau (ETP). To determine the response of mountain ecosystem to climate change and tectonic activity on the ETP, detailed analyses of chronology, pollen, grain size and magnetic susceptibility (SUS) were conducted on a lacustrine sequence from the upper reaches of the Min River. The results show that the lacustrine sediments are mainly transported by wind as those seismogenic dust at Diexi and Lixian. The fine–grained sediments (<20 μm) are background dust that was transported over a long distance, while the coarse-grained sediments (>20 μm) were transported from local to regional dust sources. Intriguingly, the sand fraction (>63 μm) suddenly increased by 10.4%, in response to the Diexi Ms 7.5 earthquake in 1933. The earthquake probably induced many large landslides and provided more sources of coarse particles close to the study area. Also, around 1933, coniferous pollen increased rapidly while herbaceous and aquatic plants decreased significantly, probably due to a marked change in the local hydrological conditions caused by the strong earthquake. The percentage of shrub pollen dominated by Hippophae, remained at a relatively high level, showing these plants to have great significance for ecological stability in tectonically active regions.

植被对青藏高原东部（ETP）等构造活跃地区的生态系统稳定性起着重要作用。为了确定山地生态系统对 ETP 气候变化和构造活动的响应，对岷江上游湖泊层序进行了年代学、花粉、粒度和磁化率 (SUS) 的详细分析。结果表明，蝶西和澧县的湖相沉积物主要是由风运移的。细粒沉积物（<20 μm）是远距离输送的背景尘埃，而粗粒沉积物（>20 μm）则是从局部到区域性尘源输送。有趣的是，沙子分数 (>63 μm) 突然增加了 10.4%，以响应 Diexi Ms1933 年 7.5 级地震。这次地震可能引发了许多大型滑坡，并在研究区附近提供了更多的粗颗粒来源。另外，1933年前后，针叶植物花粉迅速增加，草本植物和水生植物明显减少，这可能是由于强烈地震导致当地水文条件发生显着变化。以沙棘为主的灌木花粉比例保持较高水平，说明这些植物对构造活跃区的生态稳定具有重要意义。