An updated biomization scheme and vegetation reconstruction based on a synthesis of modern and mid-Holocene pollen data in China
An updated biomization scheme and vegetation reconstruction based on a synthesis of modern and mid-Holocene pollen data in China
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基于中国现代和全新世中期花粉数据综合的更新生物群化方案和植被重建
DOI：
10.1016/j.gloplacha.2020.103178
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发表时间：
2020-09
影响因子：
3.9
通讯作者：
Guo Zhengtang
中科院分区：
文献类型：
--
作者：
Sun Aizhi;Luo Yunli;Wu Haibin;Chen Xudong;Li Qin;Yu Yanyan;Sun Xiangjun;Guo Zhengtang
本文基于中国1630个地表花粉站点的18个生物群系、30个植物功能类型（pft）和590个花粉分类群，建立了新的taxa - pft - biome体系。结果显示，共有16种生物群系类型，其中包括8个新的生物群系。通过将模拟的生物群落类型与现代潜在植被进行比较，正确分配了80%的采样点，这比使用中国以前的生物化方案的研究要准确得多。中全新世（6±0.514C kyr B.P.）生物群系重建结果表明：(1)中国东部热带、亚热带、暖温带和冷温带森林向北扩展不明显，东北地区冷温带森林基本缺失；(2)中部地区森林和森林-草原生物群落向西扩展约150 ~ 300 km，与现今200 ~ 300 mm等雨量线接近。全新世中期中国中部森林和森林草原向西北移动，表明该时期中国中部的水汽水平比现在有所提高。其气候机制可能是东亚夏季风增强，导致海洋向中国北方半干旱区的水汽输送增加，促进了森林和森林草原植被的发展。
This paper presents an updated Taxa-PFTs-Biome scheme, based on 18 biomes, 30 Plant Functional Types (PFTs) and 590 pollen taxa from 1630 surface pollen sites in China. The biomization results reveal a total of 16 biome types comprising eight new biomes. By comparing the simulated biome types with modern potential vegetation, 80% of the sampling sites were correctly assigned, which is considerably more accurate than studies which have used previous Chinese biomization schemes. The biome reconstruction for the mid-Holocene (6 ± 0.514C kyr B.P.) shows that: (1) In eastern China, tropical, subtropical, warm-temperate and cool-temperate forests did not significantly expand northward, whilst cold-temperate forests were absent from northeastern China; and (2) in central China, the western boundary of steppe vegetation was shifted westwards due to a ~150–300 km extension of the forest and forest-steppe biomes, which is close to the present-day 200–300 mm isohyet. The northwestward shift of the forest and forest-steppe in central China during the mid-Holocene indicates that moisture levels were enhanced compared to the present day. The climatic mechanism responsible was likely a strengthened East Asian summer monsoon, which resulted in increased moisture transport from the ocean to the semiarid regions in northern China, promoting the development of forest and forest-steppe vegetation.
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