title: Differences in the Spatial Variability Among CO2, CH 4, and N 2O Gas Fluxes from an Urban Forest Soil in Japan.
abstract: The spatial variability of carbon dioxide (CO(2)), methane (CH(4)), and nitrous oxide (N(2)O) fluxes from forest soil with high nitrogen (N) deposition was investigated at a rolling hill region in Japan. Gas fluxes were measured on July 25th and December 5th, 2008 at 100 points within a 100 × 100 m grid. Slope direction and position influenced soil characteristics and site-specific emissions were found. The CO(2) flux showed no topological difference in July, but was significantly lower in December for north-slope with coniferous trees. Spatial dependency of CH(4) fluxes was stronger than that of CO(2) or N(2)O and showed a significantly higher uptake in hill top, and emissions in the valley indicating strong influence of water status. N(2)O fluxes showed no spatial dependency and exhibited high hot spots at different topology in July and December. The high N deposition led to high N(2)O fluxes and emphasized the spatial variability.
authors.affiliation: Department of International Environmental and Agricultural Science, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan, skimura@cc.tuat.ac.jp.
authors.forename: Sonoko Dorothea
authors.initials: SD
authors.lastname: Bellingrath-Kimura
authors.forename: Ayaka Wenhong
authors.initials: AW
authors.lastname: Kishimoto-Mo
authors.forename: Noriko
authors.initials: N
authors.lastname: Oura
authors.forename: Seiko
authors.initials: S
authors.lastname: Sekikawa
authors.forename: Seichiro
authors.initials: S
authors.lastname: Yonemura
authors.forename: Shigeto
authors.initials: S
authors.lastname: Sudo
authors.forename: Atsushi
authors.initials: A
authors.lastname: Hayakawa
authors.forename: Kazunori
authors.initials: K
authors.lastname: Minamikawa
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Takata
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hara
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis*; D002947:Cities; D004784:Environmental Monitoring; D065928:Forests; D005843:Geography; D007564:Japan; D008697:Methane / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D012987:Soil
chemical_list: D000393:Air Pollutants; D012987:Soil; D002245:Carbon Dioxide; D009609:Nitrous Oxide; D008697:Methane
references.citation: PLoS One. 2013 Oct 18;8(10):e76296
references.pmid: 24204610
references.citation: Oecologia. 2001 May;127(3):305-308
references.pmid: 28547099