Effects of environmental conditions and aboveground biomass on CO2 budget in Phragmites australis wetland of Jiaozhou Bay, China
Tóm tắt
Estuarial saline wetlands have been recognized as a vital role in CO2 cycling. However, insufficient attention has been paid to estimating CO2 fluxes from estuarial saline wetlands. In this study, the static chamber-gas chromatography (GC) method was used to quantify CO2 budget of an estuarial saline reed (Phragmites australis) wetland in Jiaozhou Bay in Qingdao City of Shandong Province, China during the reed growing season (May to October) in 2014. The CO2 budget study involved net ecosystem CO2 exchange (NEE), ecosystem respiration (Reco) and gross primary production (GPP). Temporal variation in CO2 budget and the impact of air/soil temperature, illumination intensity and aboveground biomass exerted on CO2 budget were analyzed. Results indicated that the wetland was acting as a net sink of 1129.16 g/m2during the entire growing season. Moreover, the values of Reco and GPP were 1744.89 g/m2 and 2874.05 g/m2, respectively; the ratio of Reco and GPP was 0.61. Diurnal and monthly patterns of CO2 budget varied significantly during the study period. Reco showed exponential relationships with air temperature and soil temperature at 5 cm, 10 cm, 20 cm depths, and soil temperature at 5 cm depth was the most crucial influence factor among them. Meanwhile, temperature sensitivity (Q10) of Reco was negatively correlated with soil temperature. Light and temperature exerted strong controls over NEE and GPP. Aboveground biomass over the whole growing season showed non-linear relationships with CO2 budget, while those during the early and peak growing season showed significant linear relationships with CO2 budget. This research provides valuable reference for CO2 exchange in estuarial saline wetland ecosystem.
Tài liệu tham khảo
Adkinson A C, Syed K H, Flanagan L B, 2011. Contrasting responses of growing season ecosystem CO2 exchange to variation intemperature and water table. Journal Geophysical Research, 116(G1): 99–112. doi: 10.1029/2010JG001512
Alberto M C R, Wassmann R, Hirano T et al., 2009. CO2 heat fluxes in rice fields: comparative assessment of flooded and non-flooded fields in the Philippines. Agriculture and Forest Meteorology, 149(10): 1737–1750. doi: 10.1016/j.agrformet. 2009.06.003
Andrews J A, Matamala R, Westover KM et al., 2000. Temperature effects on the diversity of soil heterotrophs and the d13C of soil-respired CO2. Soil Biology Biochemistry, 32(32): 699–706. doi: 10.1016/S0038-0717(99)00206-0
Bai J H, Cui B S, Cao H C et al., 2013. Wetland degradation and ecological restoration. The Scientific Word Journal. (3): 523–632. doi: org/10.1155/2013/523632
Baldocchi D D, Vogel C A and Hall B, 1997. Seasonal variation of carbon dioxide exchange rates above and below a boreal jack pine forest. Agriculture and Forest Meteorology, 83(1): 147–170.
Batson J, Noe G B, Hupp C R et al., 2015. Soil greenhouse gas emissions and carbon budgeting in a short-hydroperiod floodplain wetland. Journal of Geophysical Research: Biogeosciences, 120(1): 77–95. doi: 10.1002/2014JG002817
Bonneville M C, Strachan I B, Humphreys E R et al., 2008. Net ecosystem CO2 exchange in a temperate cattail marsh in relation to biophysical properties. Agricultural and Forest Meteorology, 148(1): 69–81. doi: 10.1016/j.agrformet.2007.09.004
Chen Y P, Chen G C, Ye Y, 2015. Coastal vegetation invasion increases greenhouse gas emission from wetland soils but also increases soil carbon accumulation. Science of the Total Environment, 526:19–28. doi: 10.1016/j.scitotenv.2015.04.077
Gershenson A, Bader N E, Cheng W X, 2009. Effects of substrate availability on the temperature sensitivity of soil organic matter decomposition. Global Change Biology, 15(1): 176–183. doi: 10.1111/j.1365-2486.2008.01827.x
Fang J Y, Tang Y H, Koizumi H et al., 1999. Evidence of wintertime CO2 emission from snow-covered grounds in high latitudes. Science in China (Series D), 42(4): 378–382.
Fang Jingyun, Piao Shilong, Zhao Shuqing, 2001. The carbon sink: the role of the middle and high latitudes terrestrial ecosystems in the northern hemisphere. Acta Phytoecologica Sinica, 25(5): 594–602. (in Chinese)
Falge E, Baldocchi D, Olson R J et al., 2001. Gap filling strategies for defensible annual sums of net ecosystem exchange. Agricultural and Forest Meteorology, 107(1): 43–69. doi: 10.1016/S0168-1923(00)0022-2
Guo X, Dai M, Zhai W et al., 2009. CO2 flux and seasonal variability in a large subtropical estuarine system, the Pearl River Estuary, China. Journal of Geophysical Research, 114(G3): 5283–5288. doi: 10.1029/2008JG000905
Han G X, Xing Q H, Yu J B et al., 2014. Agricultural reclamation effects on ecosystem CO2 exchange of a coastal wetland in the Yellow River Delta. Agriculture, Ecosystems and Environment, 196(1793): 187–198. doi: 10.1016/j.agee.2013.09.012
Han G X, Yang L Q, Yu J B et al., 2013. Environmental controls on net ecosystem CO2 exchange over a reed (Phtagmites australis) wetland in the Yellow River Delta, China. Estuaries and Coasts, 36(2): 401–413. doi: 10.1007/s12237-012-9572-1
Hirota M, Tang Y H, Hu Q W, 2006. Carbon dioxide dynamics and controls in a deep-water wetland on the Qinghai-Tibetan Plateau. Ecosystems, 9(4): 673–688. doi: 10.1007/s10021–006-0029-x
Ho S H, Chen C Y, Lee D J et al., 2011. Perspectives on microalgal CO2 emission mitigation systems–A review. Biotechnology Advances, 29(2): 189–198. doi: 10.1016/j.biotechadv.2010. 11.001
IPCC (Intergovernmental Panel on Climate Change), 2013. Impacts, adaptation, and vulnerability. In: Stocker T F et al. (eds.). The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press.
Janssens I A, Kowalski A S, Longdoz B et al., 2000. Assessing forest soil CO2 efflux: an in situ comparison of four techniques. Tree Physiology, 20(1): 23–32.
Juszczak R, Augustin J, 2013. Exchange of the greenhouse gases methane and nitrous oxide between the atmosphere and a temperate peatland in central Europe. Wetlands, 33(5): 895–907. doi: 10.1007/s13157-013-0448-3
Kelliher F M, Lloyd J, Arneth A et al., 1999. Carbon dioxide efflux density from the floor of a central Siberian pine forest. Agriculture and Forest Meteorology, 93(3–4): 217–232.
Lafleur P M, Roulet N T, Admiral S W, 2001. Annual cycle of CO2 exchange at a bog peatland. Journal of Geophysical Research Atmospheres, 106(D3): 3071–3081. doi: 10.1029/2000JD900588
Larmola T, Alm J, Juutinen S et al., 2003. Ecosystem CO2 exchange and plant biomass in the littoral zone of a boreal eutrophic lake. Freshwater Biology, 48(8): 1295–1310.doi: 10. 1046/j.1365-2427.2003.01079.x
Lee C, Fan C J, Wu Z Y et al., 2015. Investigating effect of environmental controls on dynamics of CO2 budget in a subtropical estuarial marsh wetland ecosystem. Environmental Research Letters, 10(2): 25005–25016. doi: 10.1088/1748-9326/10/2/025005
Lindroth A, Lund M, Nilsson M et al., 2007. Environmental controls on the CO2 exchange in north European mires. Tellus Series B-chemical and Physical Meteorology, 59(5): 812–825. doi: 10.1111/j.1600-0889.2007.00310.x
Lin Dong, Lü Shihai, Feng Chaoyang et al., 2008. Grass-shrub vegetation response to change of CO2 concentration and temperature in the mountains of north China. Pratacultural Science, 25(4): 135–140. (in Chinese)
Lloyd J, Taylor J A, 1994. On the temperature dependence of soil respiration. Functional Ecology, 8(3): 315–323. doi: 10.2307/2389824
Lund M, Lafleur P M, Roulet N T et al., 2010. Variability in exchange of CO2 across 12 northern peatland and tundra sites. Global Change Biology, 16(9): 2436–2448. doi: 10.1111/j. 1365-2486.2009.02104.x
Maltby E, Immirzi P, 1993. Carbon dynamics in peatlands and other wetland soils regional and global perspectives. Chemosphere, 27(6): 999–1023. doi: 10.1016/0045–6535(93)90065–D
Morse J L, Ardon M, Bernhardt E S, 2012. Greenhouse gas fluxes in southeastern U.S. coastal plain wetlands under contrasting land uses. Ecological Applications, 22(1): 64–280. doi: 10. 1890/11–0527.1
Piao S L, Fang J Y, Chen A P, 2003. Seasonal dynamics of terrestrial net primary production in response to climate changes in China. Acta Botanica Sinica, 45(3): 269–275.
Powell T L, Bracho R, Li J H et al., 2006. Environmental controls over net ecosystem carbon exchange of scrub oak in central Florida. Agricultural and Forest Meteorology, 141(1): 19–34. doi: 10.1016/j.agrformet.2006.09.002
Ryan M G, 1991. Effects of climate change on plant respiration. Ecological Applications, 1(2): 157–167.doi: 10.2307/1941808
Samaritani E, Shrestha J, Fournier B et al., 2013. Heterogeneity of soil carbon pools and fluxes in a channelized and a restored flood plain section (Thur River, Switzerland). Hydrology and Earth System Sciences, 15(6): 1757–1769. doi: 10.5194/hess- 15-1757-2011
Schedlbauer J L, Oberbauer S F, Starr G et al., 2010. Seasonal differences in the CO2 exchange of a short-hydroperiod Florida Everglades marsh. Agricultural and Forest Meteorology, 150(7–8): 994–1006. doi: 10.1016/j.agrformet.2010.03.005
Song H L, Liu X T, 2016. Anthropogenic effects on fluxes of ecosystem respiration and methane in the Yellow River estuary, China. Wetlands, 36(1): S113–S123. doi: 10.1007/s13157- 014-0587-1
Strachan I B, Nugent K A, Crombie S et al., 2015. Carbon dioxide and methane exchange at a cool-temperate fresh water marsh. Environmental Research Letters, 10(6): 65006–65015. doi: 10.1088/1748-9326/10/6/065006
Syed K H, Flanagan L B, Carlson P J et al., 2006. Environmental control of net ecosystem CO2 exchange in a treed, moderately rich fen in northern Alberta. Agricultural and Forest Meteorology, 140(1–4): 97–114. doi: 10.1016/j.agrformet.2006.03. 022 Van’t
Hoff J H, 1898. Lectures on Theoretical and Physical Chemistry. London: Edward Arnold Press.
Wang J J, Bai J H, Zhao Q Q et al., 2016. Five-year changes in soil organic carbon and total nitrogen in riparian wetlands affected by flow-sediment regulation in a Chinese delta. Scientific Reports. doi: 10.1038/srep21137
Wickland K, Striegl R, Mast M et al., 2001. Carbon gas exchange at a southern Rocky Mountain wetland, 1996–1998. Global Biogeochemical Cycles, 15(2): 321–335. doi: 10.1029/2000GB001325
Wilson B J, Mortazavi B, Kiene R P, 2015. Spatial and temporal variability in carbon dioxide and methane exchange at three coastal marshes along a salinity gradient in a northern Gulf of Mexico estuary. Biogeochemistry, 123(3): 329–347. doi: 10. 1007/s10533-015-0085-4
Witkamp M, Frank M L, 1969. Evolution of CO2 from litter, humus and subsoil of a pine stand. Pedobiologia, 9(5–6): 358–365.
Wohlfahrt G, Anderson-Dunn M, Bahn M et al., 2008. Biotic, abiotic, and management controls on the net ecosystem CO2 exchange of European mountain grassland ecosystems. Ecosystems, 11(8): 1338–1351. doi: 10.1007/s10021-008-9196-2
Wu Libo, Gu Song, Zhao Liang et al., 2010. Variation in net CO2 exchange, gross primary production and its affecting factors in the planted pasture ecosystem in Sanjiang Yuan Region of the Qinghai-Tibetan Plateau of China. Chinese Journal of Plant Ecology, 34(7): 770–780. (in Chinese)
Xu M, Qi Y, 2001. Spatial and seasonal variations of Q10 determined by soil respiration measurements at a Sierra Nevadan forest. Global Biogeochemical Cycles, 159(3): 687–696. doi: 10.1029/2000GB001365
Xu W H, Zou X Q, Cao L G et al., 2014. Seasonal and spatial dynamics of greenhouse gas emissions under various vegetation covers in a coastal saline wetland in southeast China. Ecological Engineering, 73(2014): 469–477. doi: 10.1016/j. ecoleng.2014.09.087
Yang Liqiong, Han Guangxuan, Yu Junbao et al., 2013. Net ecosystem CO2 exchange and its environmental regulation mechanisms in a reed wetland in the Yellow River Delta of China during the growth season. Chinese Journal of Applied Ecology, 24(9): 2415–2422. (in Chinese)
Yang P, He Q H, Huang J F et al., 2015. Fluxes of greenhouse gases at two different aquaculture ponds in the coastal saline wetland in southeast China. Ecological Engineering, 115(2015): 269–277. doi: 10.1016/j.atmosenv.2015.05.067
Yang Qingpeng, Xu Ming, Liu Hongsheng, 2011. Impact factors and uncertainties of the temperature sensitivity of soil respiration. Acta Ecologica Sinica, 31(8): 2301–2311. (in Chinese)
Ylva S O, Armel D, Angus G et al., 2011. Cattle grazing drives nitrogen and carbon cycling in a temperate salt marsh. Soil Biology and Biochemistry, 43(3): 531–541. doi: 10.1016/j.soilbio. 2010.11.018
Zhang Fawei, Liu Anhua, Li Yingnian et al., 2008. CO2 flux in alpine wetland ecosystem on the Qinghai–Tibetan Plateau. Acta Ecologica Sinica, 28(2): 453–462. (in Chinese)
Zhang L M, Yu G R, Sun X M et al., 2006. Seasonal variations of ecosystem apparent quantum yield (alpha) and maximum photosynthesis rate (P-max) of different forest ecosystems in China. Agricultural & Forest Meteorology, 137(3–4): 176–187. doi: 10.1016/j.agrformet.2006.02.006
Zhao Q Q, Bai J H, Liu Q et al., 2015. Decomposition and carbon and nitrogen dynamics of Phragmites australis litter as affected by flooding periods in coastal wetlands. Clean-Soil Air Water, 43(3): 441–554. doi: 10.1002/clen.201300823
Zhao Q Q, Bai J H, Liu Q et al., 2016. Spatial and seasonal variation of soil carbon and nitrogen content and stock in a tidal salt marsh with Tamarix chinensis, China. Wetlands, 36(Suppl1): S145–S152. doi: 10.1007/s13157-015-0647-1
Zhou L, Zhou G S, Jia Q Y, 2009. Annual cycle of CO2 exchange over a reed (Phragmites australis) wetland in Northeast China. Aquatic Botany, 91(91): 91–98. doi: 10.1016/j.aquabot.2009.03.002