Modeling the contribution of abiotic exchange to CO2 flux in alkaline soils of arid areas
WenFeng WANG1,2, Xi CHEN1* , GePing LUO1, LongHui LI1
1 State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of
Sciences, Urumqi 830011, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China
Modeling the contribution of abiotic exchange to CO2 flux in alkaline soils of arid areas
WenFeng WANG1,2, Xi CHEN1* , GePing LUO1, LongHui LI1
1 State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of
Sciences, Urumqi 830011, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China
摘要 Recent studies on alkaline soils of arid areas suggest a possible contribution of abiotic exchange to soil CO2 flux (Fc). However, both the overall contribution of abiotic CO2 exchange and its drivers remain unknown. Here we analyzed the environmental variables suggested as possible drivers by previous studies and constructed a function of these variables to model the contribution of abiotic exchange to Fc in alkaline soils of arid areas. An automated flux system was employed to measure Fc in the Manas River Basin of Xinjiang Uygur autonomous region, China. Soil pH, soil temperature at 0–5 cm (Ts), soil volumetric water content at 0–5 cm (θs) and air temperature at 10 cm above the soil surface (Tas) were simultaneously analyzed. Results highlight reduced sensitivity of Fc to Ts and good prediction of Fc by the model Fc=R10Q10(Tas–10)/10+r7q7(pH–7)+λTas+µθs+e which represents Fc as a sum of biotic and abiotic components. This presents an approximate method to quantify the contribution of soil abiotic CO2 exchange to Fc in alkaline soils of arid areas.
Abstract: Recent studies on alkaline soils of arid areas suggest a possible contribution of abiotic exchange to soil CO2 flux (Fc). However, both the overall contribution of abiotic CO2 exchange and its drivers remain unknown. Here we analyzed the environmental variables suggested as possible drivers by previous studies and constructed a function of these variables to model the contribution of abiotic exchange to Fc in alkaline soils of arid areas. An automated flux system was employed to measure Fc in the Manas River Basin of Xinjiang Uygur autonomous region, China. Soil pH, soil temperature at 0–5 cm (Ts), soil volumetric water content at 0–5 cm (θs) and air temperature at 10 cm above the soil surface (Tas) were simultaneously analyzed. Results highlight reduced sensitivity of Fc to Ts and good prediction of Fc by the model Fc=R10Q10(Tas–10)/10+r7q7(pH–7)+λTas+µθs+e which represents Fc as a sum of biotic and abiotic components. This presents an approximate method to quantify the contribution of soil abiotic CO2 exchange to Fc in alkaline soils of arid areas.
This research was supported by the National Basic Research Program of China (2009CB825105).
通讯作者:
Xi CHEN
引用本文:
WenFeng WANG, Xi CHEN, GePing LUO, LongHui LI. Modeling the contribution of abiotic exchange to CO2 flux in alkaline soils of arid areas[J]. 干旱区科学, 2014, 6(1): 27-36.
WenFeng WANG, Xi CHEN, GePing LUO, LongHui LI. Modeling the contribution of abiotic exchange to CO2 flux in alkaline soils of arid areas. Journal of Arid Land, 2014, 6(1): 27-36.
Adams T M, Adams S N. 1983. The effects of liming and soil pH on carbon and nitrogen contained in the soil biomass. Journal of Agricultural Science, 101: 553–558.Anderson M J, Gribble N A. 1998. Partitioning the variation among spatial, temporal and environmental components in a multivariate data set. Australian Journal of Ecology, 23: 158–167.Billings S A, Richter D D, Yarie J. 1998. Soil carbon dioxide fluxes and profile concentrations in two boreal forests. Canadian Journal of Forest Research, 28: 1773–1783.Borcard D, Legendre P, Drapeau P. 1992. Partialling out the spatial component of ecological variation. Ecology, 73: 1045–1055.Borcard D, Legendre P. 1994. Environmental control and spatial structure in ecological communities: an example using oribatid mites (Acari, Oribatei). Environmental and Ecological Statistics, 1: 37–61.Borcard D, Legendre P. 2002. All-scale spatial analysis of ecological data by means of principal coordinates of neighbour matrices. Ecological Modelling, 153: 51–68.Butler A J, Chesson P L. 1990. Ecology of sessile animals on sublittoral hard substrata: the need to measure variation. Australian Journal of Ecology, 15: 521–531.Caldeira K, Wickett M E. 2003. Anthropogenic carbon and ocean pH. Nature, 425: 365.Chen X, Luo G P, Xia J, et al. 2005. Ecological response to the climate change on the northern slope of the Tianshan Mountains in Xinjiang. Science in China: Series F, 48: 765–777.Chen X, Wang W F, Luo G P, et al. 2012. Time lag between carbon dioxide influx to and efflux from bare saline-alkali soil detected by the explicit partitioning and reconciling of soil CO2 flux. Stochastic Environmental Research and Risk Assessment, doi: http://dx.doi.org/ 10.1007/s00477-012-0636-3.Curtin D, Campbell C A, Jalil A. 1998. Effects of acidity on mineralization: pH-dependence of organic matter mineralization in weakly acidic soils. Soil Biology & Biochemistry, 30: 57–64.Davidson E A, Verchot L V, Cattanio J H, et al. 2000. Effects of soil water content on soil respiration in forest and cattle pastures of eastern Amazonia. Biochemistry, 48: 53–69.Davidson E A, Janssens I A. 2006. Temperature sensitivity of soil carbon decomposition and feedbacks to climate change. Nature, 440: 165–173.Dutilleul P. 1993. Spatial heterogeneity and the design of ecological field experiments. Ecology, 74: 1646–1658.Emmerich E W. 2003. Carbon dioxide fluxes in a semiarid environment with high carbonate soils. Agricultural and Forest Meteorology, 116: 91–102.Fang J Y, Tang Y H, Koizumi H, et al. 1999. Evidence of winter time CO2 emission from snow-covered grounds in high latitudes. Science in China: Series D, 42: 378–382.Giardina C P, Binkley D, Ryan M G, et al. 2004. Belowground carbon cycling in a humid tropical forest decreases with fertilization. Oecologia, 139: 545–550.Gombert P. 2002. Role of karstic dissolution in global carbon cycle. Global and Planetary Change, 33: 177–184.Gris B, Grace C, Brookes P C, et al. 1998. Temperature effects on organic matter and microbial biomass dynamics in temperate and tropical soils. Soil Biology & Biochemistry, 30: 1309–1315.Hastings S J, Oechel W C, Muhlia-Melo A. 2005. Diurnal, seasonal and annual variation in the net ecosystem CO2 exchange of a desert shrub community (Sarcocaulescent) in Baja California, Mexico. Global Change Biology, 11: 1–13.Högberg P, Nordgren A, Buchmann N, et al. 2001. Large-scale forest girdling shows that current photosynthesis drives soil respiration. Nature, 411: 789–792.Holt J A, Hodgen M J, Lamb D. 1990. Soil respiration in the seasonally dry tropics near Townsville, North Queensland. Australian Journal of Soil Research, 28: 737–745.Inglima I, Alberti G, Bertolini T, et al. 2009. Precipitation pulses enhance respiration of Mediterranean ecosystems: the balance between organic and inorganic components of increased soil CO2 efflux. Global Change Biology, 15: 1289–1301IPCC. 2007. Climate Change 2007: The Physical Sciences Basis: Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press.Jarvis P G. 1995. Scaling processes and problems. Plant Cell and Environment, 18: 1079–1089.Jasoni R L, Smith S D, Arnone J A. 2005. Net ecosystem CO2 exchange in Mojave Desert shrublands during the eighth year of exposure to elevated CO2. Global Change Biology, 11: 749–756.Kemmitt S J, Wright D, Goulding K W T, et al. 2006. pH regulation of carbon and nitrogen dynamics in two agricultural soils. Soil Biology & Biochemistry, 38: 898–911.Kowalski A S, Serrano-Ortiz P, Janssens I A, et al. 2008. Can flux tower research neglect geochemical CO2 exchange? Agricultural and Forest Meteorology, 148: 1045–1054. Lal R. 2003. Soil erosion and the global carbon budget. Environment International, 29: 437–450.Laskowshi R, Maryański M, Niklińska M. 2003. Variance components of the respiration rate and chemical characteristics of soil organic layers in Niepolomice Forest, Poland. Biogeochemistry, 64: 149–163.Legendre P, Fortin M J. 1989. Spatial pattern and ecological analysis. Vegetation, 80: 107–138.Legendre P, Borcard D. 1994. Rejoinder. Environmental and Ecological Statistics, 1: 57–61.Li L H, Luo G P, Chen X, et al. 2011. Modelling evapotranspiration in a Central Asian desert ecosystem. Ecological Modelling, 222: 3680–3691.Liu R, Pan L P, Jenerette D G, et al. 2012a. High efficiency in water use and carbon gain in a wet year for a desert halophyte community. Agricultural and Forest Meteorology, 162–163: 127–135.Liu R, Li Y, Wang Q X. 2012b. Variations in water and CO2 fluxes over a saline desert in western China. Hydrological Processes, 26: 513–522.Lloyd J, Taylor J A. 1994. On the temperature dependence of soil respiration. Functional Ecology, 8: 315–323.Lomander A, Kätterer T, Andrén O. 1998. Carbon dioxide evolution from top- and subsoil as affected by moisture and constant and fluctuating temperature. Soil Biology & Biochemistry, 30: 2017–2022.Ma J, Zheng X J, Li Y. 2012. The response of CO2 flux to rain pulses at a saline desert. Hydrological Processes, doi: http://dx.doi.org/10.1002/ hyp.9204.Mahecha M D, Reichstein M, Carvalhais N, et al. 2010. Global convergence in the temperature sensitivity of respiration at ecosystem level. Science, 329: 838–840. Mielnick P, Dugas W A, Mitchell K, et al. 2005. Long-term measurements of CO2 flux and evapotranspiration in a Chihuahuan desert grassland. Journal of Arid environments, 60: 423–436.Munson S M, Benton T J, Lauenroth W K, et al. 2010. Soil carbon flux following pulse precipitation events in the shortgrass steppe. Ecological Research, 25: 205–211.Nguyen C. 2003. Rhizodeposition of organic C by plants: mechanisms and controls. Agronomie, 23: 375–396.Økland R H, Eilertsen O. 1994. Canonical Correspondence Analysis with variation partitioning: some comments and an application. Journal of Vegetation Science, 5: 117–126.Olsen M W, Frye R J, Glenn E P. 1996. Effects of salinity and plant species on CO2 flux and leaching of dissolved organic carbon during decomposition of plant species. Plant and Soil, 179: 183–188.Raich J W, Schlesinger W H. 1992. The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate. Tellus, 44B: 81–99.Reth S, Reichstein M, Falge E. 2005. The effect of soil water content, soil temperature, soil pH-value and the root mass on soil CO2 efflux–a modified model. Plant and Soil, 268: 21–33.Sanchez-Cañete E P, Serrano-Ortiz P, Kowalski A S, et al. 2011. Subterranean CO2 ventilation and its role in the net ecosystem carbon balance of a karstic shrubland. Geophysical Research Letters, 38: L09802.Scanlon B R, Keese K E, Flint A L, et al. 2006. Global synthesis of groundwater recharge in semiarid and arid regions. Hydrological Processes, 20: 3335–3370.Schimel D S, Braswell B H, Holland E A, et al. 1994. Climatic, edaphic, and biotic controls over storage and turnover of carbon in soils. Global Biogeochemical Cycles, 8: 279–293.Schimel D S, House J I, Hibbard K A, et al. 2001. Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems. Nature, 414: 169–172.Schlesinger W H, Belnap J, Marion G. 2009. On carbon sequestration in desert ecosystems. Global Change Biology, 15: 1488–1490.Serrano-Ortiz P, Roland M, Sánchez-Moral S, et al. 2010. Hidden, abiotic CO2 flows and gaseous reservoirs in the terrestrial carbon cycle: review and perspectives. Agricultural and Forest Meteorology, 150: 321–329.Stone R. 2008. Have desert researchers discovered a hidden loop in the carbon cycle? Science, 320: 1409–1410.Underwood A J, Chapman M G. 1996. Scales of spatial patterns of distribution of intertidal invertebrates. Oecologia, 107: 212–224.Wang X H, Piao S L, Ciais P, et al. 2010. Are ecological gradients in seasonal Q10 of soil respiration explained by climate or by vegetation seasonality? Soil Biology & Biochemistry, 42: 1728–1734.Winkler J P, Cherry R S, Schlesinger W H. 1996. The Q10 relationship of microbial respiration in a temperate forest soil. Soil Biology & Biochemistry, 28: 1067–1072.Wohlfahrt G, Fenstermaker L F, Arnone J A. 2008. Large annual net ecosystem CO2 uptake of a Mojave Desert ecosystem. Global Change Biology, 14: 1475–1487.Xie J X, Li Y, Zhai C X, et al. 2009. CO2 absorption by alkaline soils and its implication to the global carbon cycle. Environmental Geology, 56: 953–961.Xu H, Li Y, Xu G Q, et al. 2007. Ecophysiological response and morphological adjustment of two Central Asian desert shrubs towards variation in summer precipitation. Plant Cell and Environment, 30: 399–409.Xu L K, Baldocchi D D, Tang J W. 2004. How soil moisture, rain pulses, and growth alter the response of ecosystem respiration to temperature. Global Biogeochemical Cycles, 18: GB4002.Zhu B Q, Yang X P, Liu Z T, et al. 2011. Geochemical compositions of soluble salts in aeolian sands from the Taklamakan and Badanjilin deserts in northern China, and their influencing factors and environmental implications. Environmental Earth Sciences, 66: 337–353.
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