NWIPB OpenIR
Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau
Hirota, Mitsuru; Tang, Yanhong; Hu, Qiwu; Hirata, Shigeki; Kato, Tomomichi; Mo, Wenhong; Cao, Guangmin; Mariko, Shigeru
2006-06-01
发表期刊ECOSYSTEMS
卷号9期号:4页码:673-688
文章类型Article
摘要To initially characterize the dynamics and environmental controls of CO2, ecosystem CO2 fluxes were measured for different vegetation zones in a deep-water wetland on the Qinghai-Tibetan Plateau during the growing season of 2002. Four zones of vegetation along a gradient from shallow to deep water were dominated, respectively by the emergent species Carex allivescens V. Krez., Scirpus distigmaticus L., Hippuris vulgaris L., and the submerged species Potamogeton pectinatus L. Gross primary production (GPP), ecosystem respiration (Re), and net ecosystem production (NEP) were markedly different among the vegetation zones, with lower Re and GPP in deeper water. NEP was highest in the Scirpus-dominated zone with moderate water depth, but lowest in the Potamogeton-zone that occupied approximately 75% of the total wetland area. Diurnal variation in CO2 flux was highly correlated with variation in light intensity and soil temperature. The relationship between CO2 flux and these environmental variables varied among the vegetation zones. Seasonal CO2 fluxes, including GPP, Re, and NEP, were strongly correlated with aboveground biomass, which was in turn determined by water depth. In the early growing season, temperature sensitivity (Q(10)) for Re varied from 6.0 to 8.9 depending on vegetation zone. Q(10) decreased in the late growing season. Estimated NEP for the whole deep-water wetland over the growing season was 24 g C m(-2). Our results suggest that water depth is the major environmental control of seasonal variation in CO2 flux, whereas photosynthetic photon flux density (PPFD) controls diurnal dynamics.; To initially characterize the dynamics and environmental controls of CO2, ecosystem CO2 fluxes were measured for different vegetation zones in a deep-water wetland on the Qinghai-Tibetan Plateau during the growing season of 2002. Four zones of vegetation along a gradient from shallow to deep water were dominated, respectively by the emergent species Carex allivescens V. Krez., Scirpus distigmaticus L., Hippuris vulgaris L., and the submerged species Potamogeton pectinatus L. Gross primary production (GPP), ecosystem respiration (Re), and net ecosystem production (NEP) were markedly different among the vegetation zones, with lower Re and GPP in deeper water. NEP was highest in the Scirpus-dominated zone with moderate water depth, but lowest in the Potamogeton-zone that occupied approximately 75% of the total wetland area. Diurnal variation in CO2 flux was highly correlated with variation in light intensity and soil temperature. The relationship between CO2 flux and these environmental variables varied among the vegetation zones. Seasonal CO2 fluxes, including GPP, Re, and NEP, were strongly correlated with aboveground biomass, which was in turn determined by water depth. In the early growing season, temperature sensitivity (Q(10)) for Re varied from 6.0 to 8.9 depending on vegetation zone. Q(10) decreased in the late growing season. Estimated NEP for the whole deep-water wetland over the growing season was 24 g C m(-2). Our results suggest that water depth is the major environmental control of seasonal variation in CO2 flux, whereas photosynthetic photon flux density (PPFD) controls diurnal dynamics.
关键词Alpine Ecosystem Aquatic Plants Nep Water Depth Wetland Zonal Vegetation
WOS标题词Science & Technology ; Life Sciences & Biomedicine
学科领域生物科学
关键词[WOS]SOIL RESPIRATION ; TEMPERATURE-DEPENDENCE ; MOISTURE CONDITIONS ; METHANE EMISSIONS ; BOREAL PEATLAND ; GAS-EXCHANGE ; DRY SUMMER ; BALANCE ; CO2 ; NORTHERN
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Ecology
WOS记录号WOS:000238292700014
引用统计
被引频次:67[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/1327
专题中国科学院西北高原生物研究所
作者单位1.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan
2.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China
3.Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan
4.Frontier Res Ctr Global Change, Kanazawa Ku, Yokohama, Kanagawa 2360001, Japan
5.Univ Tsukuba, Inst Biol Sci, Tsukuba, Ibaraki 3058572, Japan
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GB/T 7714
Hirota, Mitsuru,Tang, Yanhong,Hu, Qiwu,et al. Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau[J]. ECOSYSTEMS,2006,9(4):673-688.
APA Hirota, Mitsuru.,Tang, Yanhong.,Hu, Qiwu.,Hirata, Shigeki.,Kato, Tomomichi.,...&Mariko, Shigeru.(2006).Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau.ECOSYSTEMS,9(4),673-688.
MLA Hirota, Mitsuru,et al."Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau".ECOSYSTEMS 9.4(2006):673-688.
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