In 2007, the enclosed chamber technique was used and the measurements on methane flux from Spartina alterniflora were taken during three periods (before the flood, in the course of rising and ebbing tide, and after the ebb) in the Shanyutan wetland which is the largest wetland in the Min River estuary region. The results showed that methane fluxes had obvious seasonal variation. The average methane flux from S.alterniflora before flood and after ebb were 13.12 and 12.94 mg/(m2·h) respectively; the monthly methane flux was lower after the ebb in some months, whereas in other months, emission was either higher after the ebb, or there was no difference; in the course of rising and ebbing tide, the methane flux [3.07 mg/(m2·h)]to hydrosphere was higher than that [2.35 mg/(m2·h)]to atmosphere(p＞0.05); the total methane flux to atmosphere and hydrosphere from invasive S.alterniflora patches was 86.86 and 7.84 g/(m2·h)respectively. The correlations between methane flux from S.alterniflora and temperature and salinity were lower, and was higher between methane flux and moisture of sediment (0-20 cm).
TONG Chuan, YAN Zong-ping, WANG Wei-qi, ZENG Cong-sheng
. Methane Flux from Invasive Species (Spartina alterniflora) and Influencing Factors in the Min River Estuary[J]. SCIENTIA GEOGRAPHICA SINICA, 2008
, 28(6)
: 826
-832
.
DOI: 10.13249/j.cnki.sgs.2008.06.826
[1] Bartlett K B, Harris R C.Review and assessment of methane emissions form wetlands [J].Chemosphere, 1993, 26: 261-320.
[2] Chmura G L, Anisfeld S C, Cahoon D R, et.al. Global carbon sequestration in tidal, saline wetland soils[J].Global Biogeochemical Cycles, 2003, 17: 1111-1120.
[3] DeLaune R D, Smith C J, Patrick W H.Methane release from Gulf coast wetlands [J].Tellus, 1983, 35B: 8-15.
[4] Kelley C A, Martens C S, Ussler W.Methane dynamics across a tidally flooded riverbank margin[J].Limnology and Oceanography, 1995, 40: 1112-1129.
[5] 叶 勇, 卢昌义, 林 鹏,等.河口红树林湿地CH4通量的日变化研究[J].海洋学报,2000,22(3): 103~109.
[6] Van der Nat F J W A, Middelburg J J.Methane emission from tidal freshwater marshes [J].Biogeochemistry, 2000, 49:103-121.
[7] Chang T C, Yang S S.Methane emission from wetland in Taiwan [J].Atmosphere Environment, 2003, 37: 4551-4558.
[8] 杨红霞,王东启,陈振楼,等.长江口崇明东滩潮间带(CH4)排放及其季节变化[J].地理科学,2007,27(3):408~413.
[9] 崔保山.三江平原沼泽地甲烷排放规律及估算[J].地理科学,1997,17(1):86~93.
[10] 王德宣, 吕宪国, 丁维新,等.三江平原沼泽湿地与稻田CH4排放对比研究[J].地理科学,2002,22(4):500~503.
[11] 丁维新, 蔡祖聪.沼泽甲烷排放及其主要影响因素[J].地理科学, 2002, 22(5):619~625.
[12] 王德宣,丁维新,王毅勇.若尔盖高原与三江平原湿地甲烷排放差异的主要环境影响因子[J].湿地科学,2003,23(1): 63~67.
[13] 宋长春, 杨文燕 ,徐小锋, 等.沼泽湿地生态系统土壤CO2 和CH4 排放动态及影响因素[J].环境科学,2004,25(4):1~6.
[14] 金会军, 吴 杰, 程国栋, 等.青藏高原湿地CH4排放评估[J].科学通报, 1999, 44(16):1785~1762.
[15] 沈焕庭, 朱建荣.论我国海岸带海陆相互作用研究[J].海洋通报, 1999, 18(6):11~17.
[16] Vitousek P M, Loope L L, Westbrooks R.Introduced species: a significant component of human-caused global changes[J].New Zealand of Journal Ecology, 1997, 21:1-16.
[17] Zedler J B, Kercher S.Causes and Consequences of Invasive Plants in Wetlands: Opportunities, Opportunists, and Outcomes[J].Critical Reviews in Plant Sciences, 2004, 23(5): 431-452.
[18] 中国国家环境保护总局.我国公布首批外来入侵物种名单. http://www. chinanew s. com. cn/n/279440. htm l, 2003203206/26.
[19] Cheng X L, Peng R H, Chen J Q, et al.CH4 and N2O emissions from Spartina alterniflora and Phragmites australis in experimental mesocosms[J].Chemosphere, 2007, 68: 420-427.
[20] 郑彩红,曾从盛,陈志强, 等.闽江河口区湿地景观格局演变研究[J].湿地科学, 2006,4(1):29~34.
[21] Christensen T R , Michelsen A, Jonasson S, et al.Carbon dioxide and methane exchange of a subarctic heath in response to climate change related environmental manipulations[J]. Oikos, 1997,79:34-44.
[22] Kim J, Verma D P.Diel variation in methane emission from a mid latitude prairie wetland: Significance of convective throughflow in Phragmites australis[J].Journal of Geophysical Research, 1998, 103(21) : 28029-28039.
[23] 郝庆菊, 王跃思, 江长胜, 等.湿地甲烷排放若干问题的探讨[J].生态学杂志, 2005,24(2):170~175.
[24] 黄国宏, 李玉祥, 陈冠雄, 等.环境因素对芦苇湿地CH4排放的影响[J].环境科学, 2001, 22(1):1~5.
[25] Svensson B H, Rosswall T.In situ methane production from acid peat in plant communities with different moisture regimes in a subarctic mire [J].Oikos, 1984, 43 :341-350.
[26] Bartlett K B, Bartlett D S, Harriss R C.Methane emission along a salt marsh salinity gradient[J].Biogeochemistry,1987,4: 183-202.
[27] Cicerone R J, Oremland O.Boiogeochemical aspects on automosphric methane[J].Global Biogeochemical Cycle, 1998, 2: 299-327.
[28] Peters V, Conrad R.Sequential reduction processes and initiation of CH4 production upon flooding of oxic upland soils[J].Soil Biology and Biochemistry, 1996, 28: 371-382.
[29] Purvaja R, Ramesh R.Natural and anthropogenicmethane emission from coastal wetlands of south India[J].Environmental Management, 2001, 27: 547-557.
