| Title: | Evident elevation of atmospheric monoterpenes due to degradation-induced species changes in a semi-arid grassland |
| Author(s): | Wang H; Wang X; Zhang Y; Mu Y; Han X; |
| Address: | "State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing 100093, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Electronic address: hjwang78@gmail.com. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing 100093, China; State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China" |
| DOI: | 10.1016/j.scitotenv.2015.10.022 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "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 mug m(-3) (34.88 +/- 9.73 mug m(-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. alpha-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 ( |
| Keywords: | Air Pollutants/*analysis Atmosphere China Climate Change *Environmental Monitoring Grassland Monoterpenes/*analysis Seasons Soil/chemistry Volatile Organic Compounds/*analysis Artemisia frigida Biogenic volatile organic compounds Isoprene Monoterpene Sedg; |
| Notes: | "MedlineWang, Hongjun Wang, Xinming Zhang, Yanli Mu, Yujing Han, Xingguo eng Research Support, Non-U.S. Gov't Netherlands 2015/10/23 Sci Total Environ. 2016 Jan 15; 541:1499-1503. doi: 10.1016/j.scitotenv.2015.10.022. Epub 2015 Nov 11" |
