An updated biomization scheme and vegetation reconstruction based on a synthesis of modern and mid-Holocene pollen data in China
| Autor: | Haibin Wu, Zhengtang Guo, Aizhi Sun, Yanyan Yu, Xiangjun Sun, Yunli Luo, Qin Li, Xudong Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Global and Planetary Change
010504 meteorology & atmospheric sciences Biome 020206 networking & telecommunications 02 engineering and technology Vegetation Subtropics Present day Oceanography medicine.disease_cause 01 natural sciences Taxon Geography Pollen 0202 electrical engineering electronic engineering information engineering medicine Physical geography China Holocene 0105 earth and related environmental sciences |
| Zdroj: | Global and Planetary Change. 192:103178 |
| ISSN: | 0921-8181 |
| Popis: | 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 ± 0.5 14C 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. |
| Databáze: | OpenAIRE |
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