How did climate drying reduce ecosystem carbon storage in the   forest-steppe ecotone? A case study in Inner Mongolia, China

doi:10.1007/s10265-010-0311-z

CORC > 北京大学 > 城市与环境学院

	How did climate drying reduce ecosystem carbon storage in the forest-steppe ecotone? A case study in Inner Mongolia, China
	Zhang, Yuke ; Liu, Hongyan
刊名	journal of plant research
	2010
关键词	Carbon density Forest-steppe ecotone Soil organic carbon Soil texture Holocene NORTHERN CHINA WIND EROSION SOILS DESERTIFICATION VEGETATION HORQIN RANGE
DOI	10.1007/s10265-010-0311-z
英文摘要	The projected recession of forests in the forest-steppe ecotone under projected climate drying would restrict the carbon sink function of terrestrial ecosystems. Previous studies have shown that the forest-steppe ecotone in the southeastern Inner Mongolia Plateau originally resulted from climate drying and vegetation shifts during the mid- to late-Holocene, but the interrelated processes of changing soil carbon storage and vegetation and soil shifts remain unclear. A total of 44 forest soil profiles and 40 steppe soil profiles were excavated to determine soil carbon storage in deciduous broadleaf forests (DBF), coniferous forests (CF) and steppe (ST) in this area. Carbon density was estimated to be 106.51 t/hm(2) (DBF), 73.20 t/hm(2) (CF), and 28.14 t/hm(2) (ST) for these ecosystems. Soil organic carbon (SOC) content was negatively correlated with sand content (R = -0.879, P < 0.01, n = 42), and positively correlated with silt (R = 0.881, P < 0.01, n = 42) and clay (R = 0.858, P < 0.01, n = 42) content. Consistent trends between fractions of coarse sand and a proxy index of relative aridity in sediment sequences from two palaeo-lakes further imply that climate drying reduced SOC through coarsening of the soil texture in the forest-steppe ecotone. Changes in carbon storage caused by climate drying can be divided into two stages: (1) carbon storage of the ecosystem was reduced to 68.7%, mostly by soil coarsening when DBF were replaced by CF at similar to 5,900 (14)C years before present (BP); and (2) carbon storage was reduced to 26.4%, mostly by vegetation shifts when CF were replaced by ST at similar to 2,900 (14)C years BP.; Plant Sciences; SCI(E); PubMed; 2; ARTICLE; 4; 543-549; 123
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/160699]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhang, Yuke,Liu, Hongyan. How did climate drying reduce ecosystem carbon storage in the forest-steppe ecotone? A case study in Inner Mongolia, China[J]. journal of plant research,2010.
APA	Zhang, Yuke,&Liu, Hongyan.(2010).How did climate drying reduce ecosystem carbon storage in the forest-steppe ecotone? A case study in Inner Mongolia, China.journal of plant research.
MLA	Zhang, Yuke,et al."How did climate drying reduce ecosystem carbon storage in the forest-steppe ecotone? A case study in Inner Mongolia, China".journal of plant research (2010).