长江口盐沼土壤有机质更新特征的滩面趋势
收稿日期: 2006-09-09
修回日期: 2006-10-20
网络出版日期: 2007-01-25
基金资助
国家自然科学基金项目(40202032); 国家重点基础研究发展规划(973)项目(2002CB412403); 上海市高等学 校青年科学基金项目(2000QN14)
Trends of Soil Organic Matter Turnover in the Salt Marsh of the Yangtze River Estuary
Received date: 2006-09-09
Revised date: 2006-10-20
Online published: 2007-01-25
Supported by
National Natural Science Foundation of China, No.40202032; National 973 Project, No.2002CB412403; Program for Young University Teachers in Shanghai, No.2000QN14
通过对长江口崇明东滩高潮滩、中潮滩以及光滩柱状样的有机元素(C、N) 含量与碳稳定同位素组成(δ13C)、粒度组成等的测定, 研究盐沼土壤有机质更新特征及其滩面趋势。结果表明, 长江口盐沼土壤POC - δ13C 相关特征与山地土壤剖面上部土层的基本类似, 盐沼土壤有机质主要源于长江流域表层土壤, 有机质年龄不足100 年。不同高程柱样TN - C/N、POC - TIC 与POC - δ13C关系特征表明盐沼土壤有机质更新程度普遍较低, 有机质更新特征呈明显的滩面变化趋势。光滩有机质基本反映沉积母质特征, 更新程度极低; 中、高潮滩有机质更新作用已经发生, 随着滩面演变, 处于不同更新阶段的有机质组分混杂程度提高。盐沼滩面过程塑造垂向沉积层序, 层序中独特的沙、泥纹层构造导致物质上下运移困难, 有机质更新作用受到抑制。盐沼滩面过程直接影响有机质的累积与更新, 对于有机质更新的时空特征具有显著制约。
陈庆强, 周菊珍, 孟翊, 顾靖华, 胡克林 . 长江口盐沼土壤有机质更新特征的滩面趋势[J]. 地理学报, 2007 , 62(1) : 72 -80 . DOI: 10.11821/xb200701008
Soil organic matter (SOM) turnover was studied for the Chongmingdongtan Salt Marsh in the Yangtze River Estuary, based on the analyses of stable carbon isotope (δ13C), grain sizes and contents of particulate organic carbon (POC), total nitrogen (TN) and inorganic carbon (TIC) for three cores excavated from high marsh, middle marsh and bare flat. Results indicated that correlations between soil POC contents and δ13C values of the salt marsh cores were similar to those of the upper soil layers of mountainous soil profiles with different altitudes. SOM of salt marsh was younger than 100 years, and originated mainly from materials of soil erosion in the catchment basin of the Yangtze River. Diagrams of TN-C/N, POC-TIC and POC-δ13C for the cores indicated that turnover degree of SOM from the salt marsh was generally low, and tendencies regarding SOM turnover were clear from bare flat to high marsh. Bare flat showed characteristics of original sediments, with minor SOM turnover. The turnover of SOM was discernable in the high marsh and middle marsh, and the mixing degrees of SOM compartments with different turnover rates increased with evolution of the muddy flat. The exclusive structure of muddy layer and sandy layer originated from dynamic depositional processes on tidal flat made great difficulties for vertical migration of dissolved materials, and SOM turnover was then constrained.
[1] Eswaran H E, Vandenberg E, Reich P. Organic carbon in soils of the world. Soil Science Society of America Journal, 1993, 57: 192-194.
[2] Gorham E. The biogeochemistry of northern peatlands and its possible responses to global warming. In: Woodwell G M, Mackenzie F T (eds.), Biotic Feedbacks in the Global Climatic System: Will the Warming Speed the Warming? Oxford, England: Oxford University Press, 1995. 169-187.
[3] Mitsch W J, Wu X. Wetlands and global change. In: Lal R, Kimble J, Levine E et al. (eds.), Advances in Soil Science: Soil Management and Greenhouse Effect. Boca Raton, FL: CRC Press/Lewis Publishers, 1995. 205-230.
[4] Gorham E. Northern peatlands: role in the carbon cycle and probable responses to climatic warming. Ecological Applications, 1991, 1: 182-195.
[5] Mitsch W J, Gossilink J G. Wetlands. 3rd edn. New York: John Wiley & Sons, Inc., 2000. 261-305.
[6] Connor R F, Chmura G L, Beecher C B. Carbon accumulation in Bay of Fundy salt marshes: implications for restoration of reclaimed marshes. Global Biogeochemical Cycles, 2001, 15: 943-954.
[7] Chmura G L, Anisfeld S C, Cahoon D R et al. Global carbon sequestration in tidal, saline wetland soils. Global Biogeochemical Cycles, 2003, 17(4): 1111, doi:10.1029/2002GB001917.
[8] Choi Y, Wang Y. Dynamics of carbon sequestration in a coastal wetland using radiocarbon measurements. Global Biogeochemical Cycles, 2004, 18, GB4016, doi:10.1029/2004GB002261.
[9] Saggar S, Tate K R, Feltham C W et al. Carbon turnover in a range of allophonic soils amended with C-14-labbeled glucose. Soil Biology and Biochemistry, 1994, 26: 1263-1271.
[10] Chen Q Q, Sun Y M, Shen C D et al. Organic matter turnover rates and CO2 flux from organic matter decomposition of mountain soil profiles in the subtropical area, south China. Catena, 2002, 49(3): 217-229.
[11] Trumbore S, Costa E S D, Nepstad D C et al. Dynamics of fine root carbon in Amazonian tropical ecosystems and the contribution of roots to soil respiration. Global Change Biology, 2006, 12: 217-229.
[12] Rasmussen C, Southard R J, Horwath W R. Mineral control of organic carbon mineralization in a range of temperate conifer forest soils. Global Change Biology, 2006, 12: 834-847.
[13] Ren Mei'e. A study on sedimentation of tidal mudflats of China. Tropical Geography, 1985, 4: 6-14.
[ 任美锷. 中国淤 泥质潮滩沉积研究的若干问题. 热带海洋, 1985, 4: 6-14.]
[14] Yuan Xingzhong, Lu Jianjian, Liu Hong. Influence of characteristics of Scirpus mariqueter community on the benthic macro-invertebrate in a salt marsh of the Changjiang Estuary. Acta Ecologica Sinica, 2002, 22(3): 326-333.
[ 袁兴中, 陆健健, 刘红. 河口盐沼植物对大型底栖动物群落的影响. 生态学报, 2002, 22(3): 326-333.]
[15] Yuan Xingzhong, Lu Jianjian. Studies on zoobenthos resources in the islands of the Changjiang estuary. Journal of Natural Resources, 2001, 16(1): 37-41.
[ 袁兴中, 陆健健. 长江口岛屿湿地的底栖动物资源研究. 自然资源学报, 2001, 16(1): 37-41.]
[16] GSICI (Group of Shanghai Island Comprehensive Investigation). Report of Shanghai Islands Comprehensive Investigation. Shanghai: Shanghai Scientific & Technological Publisher, 1996. 13-19, 22-31, 121-128.
[上海市海岛资 源综合调查报告编写组. 上海市海岛资源综合调查报告. 上海: 上海科学技术出版社, 1996. 13-19, 22-31, 121-128.]
[17] Yang Shilun, Chen Shenliang, Wang Xingfang. Controlling factors of changes of natural environment and countermeasures in the Yangtze River Estuary. Journal of Natural Disasters, 1997, 6(4): 74-81.
[杨世伦, 陈沈良, 王兴 放. 长江口未来环境演变的若干影响因子及减灾对策. 自然灾害学报, 1997, 6(4): 74-81.]
[18] Fan Daidu, Li Congxian, Chen Meifa et al. Quantitative analyses on diastems of the mudflat deposits in the Yangtze River Delta. Marine Geology & Quaternary Geology, 2001, 21(4): 1-6.
[范代读, 李从先, 陈美发等. 长江三角洲泥质 潮坪沉积间断的定量分析. 海洋地质与第四纪地质, 2001, 21(4): 1-6.]
[19] He Xiaoqin, Dai Xuerong, Liu Qingyu et al. Observation and analysis of the process of present-day morphology in the Chongming tidal flat of the Yangtze River Estuary. Marine Geology & Quaternary Geology, 2004, 24(2): 23-27.
[何小勤, 戴雪荣, 刘清玉等. 长江口崇明东滩现代地貌过程实地观测与分析. 海洋地质与第四纪地质, 2004, 24(2): 23-27.]
[20] B!ttcher M E, Hespenheide B, Llobet-Brossa E et al. The biogeochemistry, stable isotope geochemistry, and microbial community structure of a temperate intertidal mudflat. Continental Shelf Research, 2000, 20: 1749-1769.
[21] Cowie G L, Hedges J I. Biochemical indicators of diagenetic alteration in natural organic matter mixtures. Nature, 1994, 369: 307-307.
[22] Soto-Jimenez M F, Paez-Osuna F, Ruiz-Fernandez A C. Organic matter and nutrients in an altered subtropical marsh system, Chiricahueto, NW Mexico. Environmental Geology, 2002, 43: 913-921.
[23] Li Congxian, Wang Ping, Fan Daidu et al. Tidal flat depositional rhythm and diastem. Marine Geology & Quaternary Geology, 1999, 19(2): 11-18.
[李从先, 王平, 范代读等. 潮汐沉积率与沉积间断. 海洋地质与第四纪地质, 1999, 19 (2): 11-18.]
[24] Spiker E C, Hatcher P C. Carbon isotope fractionation of sapropelic organic matter during early diagenesis. Organic Geochemistry, 1984, 6: 283-290.
[25] McArthur J M, Tyson R V, Thompson J et al. Early diagenesis of marine organic matter: alteration of the carbon isotopic composition. Marine Geology, 1992, 105: 51-61.
[26] Meyers P A. Preservation of elemental and isotopic source identification of sedimentary organic matter. Chemical Geology, 1994, 114: 289-302.
[27] Wu Ying, Zhang Jing, Zhang Zaifeng et al. Seasonal variability of stable carbon and nitrogen isotope of suspended particulate matter in the Changjiang River. Oceanologia et Limnologia Sinica, 2002, 33(5): 546-552.
[ 吴莹, 张经, 张 再峰等. 长江悬浮颗粒物中稳定碳、氮同位素的季节分布. 海洋与湖沼, 2002, 33(5): 546-552.]
[28] Chen Q Q, Shen C D, Sun Y M et al. Spatial and temporal distribution of carbon isotopes in soil organic matter at the Dinghushan Biosphere Reserve, South China. Plant and Soil, 2005, 273(1-2): 115-128.
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