Abstract

The high-resolution pollen record retrieved from dated sediments of the Khanka Depression has made it possible for the first time to reconstruct evolution of vegetation in the south of the Russian Far East that occurred during one of the coldest phase of MIS 2 – the Younger Dryas. The results of the spore-pollen analysis have shown that worsening of climate conditions between 18 200 and 15 500 cal yr BP that occurred after the first, slight warming during MIS 2, caused boreal flora plants, dominating in the south of Russian Far East, to spread again in the drier and colder climate comparable to the Gydan Stage of the Sartan Glaciation. Their distribution areas in the cold climate that differed significantly from the modern ones again started to shift to the south due to increasing cooling. The spruce and small-leaved forests, sparse larch and dwarf birch, alder and dwarf pine forests, and also sphagnum bogs dominated in the ecosystems of the region.

中文翻译：

---

俄罗斯远东南部新仙女木期的第一个花粉记录

摘要

从兴凯凹陷的年代沉积物中检索到的高分辨率花粉记录首次使得重建俄罗斯远东南部植被的演化成为可能，该演化发生在 MIS 2 最冷的阶段之一——新仙女木期。 。孢子花粉分析结果表明，在 MIS 2 期间第一次轻微变暖之后，18 200 至 15 500 cal yr BP 之间气候条件恶化，导致北方植物群在俄罗斯远东南部占主导地位，在与萨坦冰川的格丹阶段相当的干燥和寒冷的气候中再次传播。由于气温升高，与现代气候显着不同的它们的分布区又开始向南方转移。该地区的生态系统以云杉和小叶林、稀疏落叶松和矮桦林、桤木和矮松林以及水苔沼泽为主。