Belowground biomass of alpine shrublands across the northeast Tibetan Plateau

NWIPB OpenIR

	Belowground biomass of alpine shrublands across the northeast Tibetan Plateau
	Nie Xiuging; Dong Wang; Yang Lucun; Fan Li; Zhou Guoying
	2020
发表期刊	ECOLOGY AND EVOLUTION
卷号	10 期号:12
摘要	Although belowground biomass (BGB) plays an important role in global cycling, the storage of BGB and climatic effects on it are remaining unclear. With data from 49 sites, we aimed to investigate BGB and its climatic controls in alpine shrublands in the Tibetan Plateau. Our study showed that the BGB (both grass-layer and shrub-layer biomass) storage in the alpine shrublands was 67.24 Tg, and the mean BGB density and shrublands area were 1,567.38 g/m(2) and 4.29 x 10(4) km(2), respectively. Shrub layer had a larger BGB stock and accounted for 66% of total BGB this area, while only 34% was accumulated in the grass layer. BGB of the grass layer in the Tibetan Plateau shrublands was larger than that of Tibetan alpine grasslands, indicating that shrubland ecosystem played a critical importance role in carbon cycle on the Tibetan Plateau. The BGB in the grass layer and shrub layer demonstrated different correlations with climatic factors. Specifically, the effects from mean annual temperature on shrub-layer BGB were not significant, similarly to the relationship between mean annual precipitation and grass-layer BGB. But shrub-layer BGB had a significantly positive relationship with mean annual precipitation (p < .05), while grass-layer BGB showed a trend of decrease with increasing mean annual temperature (p < .05). Consequently, the actual and potential increases of BGB varied due to different increases of mean annual precipitation and temperature among different areas of the Tibetan Plateau. Therefore, in the warmer and wetter scenario, due to contrary relationships from mean annual precipitation and temperature on shrub-layer BGB and grass-layer BGB, it is necessary to conduct a long-term monitoring about dynamic changes to increase the precision of assessment of BGB carbon sequestration in the Tibetan Plateau alpine shrublands.
关键词	alpine shrublands belowground biomass mean annual precipitation mean annual temperature Tibetan Plateau
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60353
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Nie Xiuging,Dong Wang,Yang Lucun,et al. Belowground biomass of alpine shrublands across the northeast Tibetan Plateau[J]. ECOLOGY AND EVOLUTION,2020,10(12).
APA	Nie Xiuging,Dong Wang,Yang Lucun,Fan Li,&Zhou Guoying.(2020).Belowground biomass of alpine shrublands across the northeast Tibetan Plateau.ECOLOGY AND EVOLUTION,10(12).
MLA	Nie Xiuging,et al."Belowground biomass of alpine shrublands across the northeast Tibetan Plateau".ECOLOGY AND EVOLUTION 10.12(2020).