Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.scitotenv.2005.11.025 |
Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire | |
Engle, Mark A.; Gustin, Mae Sexauer; Johnson, Dale W.; Murphy, James F.; Miller, Wally W.; Walker, Roger F.; Wright, Joan; Markee, Melissa | |
通讯作者 | Gustin, Mae Sexauer |
来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
![]() |
ISSN | 0048-9697 |
EISSN | 1879-1026 |
出版年 | 2006 |
卷号 | 367期号:1页码:222-233 |
英文摘要 | Mercury (Hg) concentration, reservoir mass, and Hg reservoir size were determined for vegetation components, litter, and mineral soil for two Sierran forest sites and one desert sagebrush steppe site. Mercury was found to be held primarily in the mineral soil (maximum depth of 60 to 100 cm), which contained more than 90% of the total ecosystem reservoir. However, Hg in foliage, bark, and litter plays a more dominant role in Hg cycling than the mineral soil. Mercury partitioning into ecosystem components at the Sierran forest sites was similar to that observed for other US forest sites. Vegetation and litter Hg reservoirs were significantly smaller in the sagebrush steppe system because of lower biomass. Data collected from these ecosystems after wildfire and prescribed burns showed a significant decrease in the Hg pool from certain reservoirs. No loss from mineral soil was observed for the study areas but data from fire severity points suggested that Hg in the upper few millimeters of surface soil may be volatilized due to exposure to elevated temperatures. Comparison of data from burned and unburned plots suggested that the only significant source of atmospheric Hg from the prescribed burn was combustion of litter. Differences in unburned versus burned Hg reservoirs at the forest wildfire site demonstrated that drastic reduction in the litter and above ground live biomass Hg reservoirs after burning had occurred. Sagebrush and litter were absent in the burned plots after a wildfire suggesting that both reservoirs were released during the fire. Mercury emissions due to fire from the forest prescribed burn, forest wildfire, and sagebrush steppe wildfire sites were roughly estimated at 2.0 to 5.1, 2.2 to 4.9, and 0.36 +/- 0.13 g ha(-1), respectively, with litter and vegetation being the most important sources. (c) 2005 Elsevier B.V All rights reserved. |
英文关键词 | fire mercury emission ecosystem forest desert |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000240179700021 |
WOS关键词 | ATMOSPHERIC MERCURY ; FOLIAR EXCHANGE ; GASEOUS MERCURY ; SOIL ; VEGETATION ; EMISSIONS ; BIOMASS ; CARBON ; METHYLMERCURY ; ACCUMULATION |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/153016 |
作者单位 | (1)Univ Nevada, Dept Nat Resources & Environm Sci, Mail Stop 370, Reno, NV 89557 USA |
推荐引用方式 GB/T 7714 | Engle, Mark A.,Gustin, Mae Sexauer,Johnson, Dale W.,et al. Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire[J],2006,367(1):222-233. |
APA | Engle, Mark A..,Gustin, Mae Sexauer.,Johnson, Dale W..,Murphy, James F..,Miller, Wally W..,...&Markee, Melissa.(2006).Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire.SCIENCE OF THE TOTAL ENVIRONMENT,367(1),222-233. |
MLA | Engle, Mark A.,et al."Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire".SCIENCE OF THE TOTAL ENVIRONMENT 367.1(2006):222-233. |
条目包含的文件 | 条目无相关文件。 |
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。