Evident elevation of atmospheric monoterpenes due to degradation-induced species changes in a semi-arid grassland
文献类型：期刊论文
| 作者 | Wang, Hongjun; Wang, Xinming; Zhang, Yanli; Mu, Yujing; Han, Xingguo |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2016-01-15 |
| 卷号 | 541页码:1499-1503 |
| 关键词 | Monoterpene Isoprene Biogenic volatile organic compounds Artemisia frigida Sedge Steppe |
| 英文摘要 | Biogenic volatile organic compounds (BVOCs) emitted from plants have substantial effects on atmospheric chemistry/physics and feedbacks on ecosystem function. The on-going climate change and anthropogenic disturbance have been confirmed to cause the evident degradation of grassland with shift of plant community, and hence BVOCs emissions were suspected to be altered due to the different BOVCs emission potentials of different species. In this study, we investigated BVOCs concentration above ground surface during growing season in a degraded semi-arid grassland (41 degrees 2'N-45 degrees 6'N, 113 degrees 5'-117 degrees 8') in Inner Mongolia. The observed monoterpenes' concentrations varied from 0.10 to 215.78 mu gm(-3) (34.88 +/- 9.73 mu gm(-3) in average) across 41 sites. Compared to non-degraded grassland, concentrations of monoterpenes were about 180 times higher at the sites dominated by subshrub - Artemisia frigida, a preponderant species under drought stress and over-grazing. The biomass of A. frigida explained 51.39% of the variation of monoterpenes' concentrations. a-pinene, beta-pinene and gamma-terpinene dominated in the 10 determined monoterpenes, accounting for 37.72 +/- 2.98%, 14.65 +/- 2.55% and 10.50 +/- 2.37% of the total monoterpenes concentration, respectively. Low isoprene concentrations (<= 3.25 mu g m(-3)) were found and sedge biomass contributed about 51.76% to their spatial variation. alpha-pinene and isoprene emissions at noon were as high as 515.53 +/- 88.34 mu g m(-2) h(-1) and 7606.19 +/- 1073.94 mu g m(-2)h(-1) in A. frigida- and sedge-dominated areas where their biomass were 236.90 g m(-2) and 72.37 g m(-2), respectively. Our results suggested that the expansion of A. frigida and sedge caused by over-grazing and climatic stresses may increase local ambient BVOCs concentration in grassland. (C) 2015 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35706]  |
| 专题 | 生态环境研究中心_大气环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Hongjun,Wang, Xinming,Zhang, Yanli,et al. Evident elevation of atmospheric monoterpenes due to degradation-induced species changes in a semi-arid grassland[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,541:1499-1503. |
| APA | Wang, Hongjun,Wang, Xinming,Zhang, Yanli,Mu, Yujing,&Han, Xingguo.(2016).Evident elevation of atmospheric monoterpenes due to degradation-induced species changes in a semi-arid grassland.SCIENCE OF THE TOTAL ENVIRONMENT,541,1499-1503. |
| MLA | Wang, Hongjun,et al."Evident elevation of atmospheric monoterpenes due to degradation-induced species changes in a semi-arid grassland".SCIENCE OF THE TOTAL ENVIRONMENT 541(2016):1499-1503. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。