Effects of Landuse Change on CH4 Soil-Atmospheric Exchange in Alpine Meadow on the Tibetan Plateau
Guo, XW; Du, YG; Han, DR; Xu, XL; Zhang, FW; Lin, L; Li, YK; Liu, SL; Ouyang, JZ; Cao, GM
2015
Source PublicationPOLISH JOURNAL OF ENVIRONMENTAL STUDIES
ISSN1230-1485
Volume24Issue:4Pages:1593-1602
AbstractDegradation of shrub meadows and reclamation of alpine meadows may heavily affect the soil sink for atmospheric methane (CH4), but this is poorly understood. Therefore, in situ measurements of atmospheric CH4 consumption were conducted in four landuse types: natural alpine meadow (NM), Elymus nutans pasture (EP), herbaceous meadow in shrub (HS), and a P. fruticosa shrub meadow (PS) within two years. CH4 fluxes were measured using static chambers and gas chromatography. All four types of land use showed atmospheric CH4 sink throughout the two years, with mean soil CH4 consumption rates at 24.6+/-10.9, 33.8+/-15.0, 39.8+/-10.3, and 28.1+/-12.1 mu g CH4.m(-2).hr(-1) for NM, EP, PS, and HS, respectively. Soil CH4 consumption increased by 40% by reclamation from NM to EP, while it decreased by 30% by degradation from PS to HS. Soil CH4 consumption in four types of land use was significantly correlated with temperature at 5 cm depth (P<0.01) and the soil water-filled pore space (WFPS) (P<0.05). Temperature showed stronger effects on soil CH4 consumption than WFPS, except in NM. UV radiation was positively correlated with soil CH4 consumption with increasing temperature and decreasing soil moisture. These findings indicate that a decrease in the grazing pressure in shrub meadows and increase in the area of artificial pasture reclaimed from alpine meadows would enhance the CH4 sink in alpine meadows on the Tibetan Plateau.
SubtypeJournal
Keywordalpine meadows CH4 consumption soil water-filled pore space temperature landuse change
Subject AreaEnvironmental Sciences & Ecology
WOS Subject ExtendedEnvironmental Sciences
WOS KeywordMETHANE OXIDATION ; NITROUS-OXIDE ; CARBON-DIOXIDE ; INNER-MONGOLIA ; N2O FLUXES ; STEPPE ; TEMPERATE ; CHINA ; CO2 ; GRASSLANDS
Indexed BySCI
Language英语
WOS IDWOS:000358899400014
PublisherHARD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44467
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Guo, XW,Du, YG,Han, DR,et al. Effects of Landuse Change on CH4 Soil-Atmospheric Exchange in Alpine Meadow on the Tibetan Plateau[J]. POLISH JOURNAL OF ENVIRONMENTAL STUDIES,2015,24(4):1593-1602.
APA Guo, XW.,Du, YG.,Han, DR.,Xu, XL.,Zhang, FW.,...&Cao, GM.(2015).Effects of Landuse Change on CH4 Soil-Atmospheric Exchange in Alpine Meadow on the Tibetan Plateau.POLISH JOURNAL OF ENVIRONMENTAL STUDIES,24(4),1593-1602.
MLA Guo, XW,et al."Effects of Landuse Change on CH4 Soil-Atmospheric Exchange in Alpine Meadow on the Tibetan Plateau".POLISH JOURNAL OF ENVIRONMENTAL STUDIES 24.4(2015):1593-1602.
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