| 草海湖泊系统稳定碳同位素地球化学及其碳循环的简单模式 | |
| 张军 | |
| 1994 | |
| Degree Grantor | 中国科学院地球化学研究所 |
| Place of Conferral | 中国科学院地球化学研究所 |
| Degree Name | 博士 |
| Degree Discipline | 环境地球化学 |
| Keyword | 草海 稳定碳同位素组成 光合－呼吸作用 有机质降解 碳循环 |
| Abstract | 本文对草海湖系统中主要含碳物质（湖水DIC、水生植物、沉积物有机质、沉积物碳酸盐）的稳定碳同位素组成进行了分析，其同位素组成分别为：-3.7‰－-10.6‰，-15.5‰－-20‰，-20.5‰－-26.7‰ -4.4‰－-13.1‰。结果表明：草海湖水DIC的稳定碳同位素组成在整个湖泊中变化较大，草海中主要水生植物的稳定碳同位素组成明显重于一般的陆生植物（C3型），而且湖水DIC、沉积物有机质和沉积物碳酸盐的同位素组成均呈现随深度加深逐渐变轻的趋势，表明在草海这样一个水生植物繁茂的浅水富氧湖泊中，光合－呼吸作用和有机质降解对整个湖泊体系中主要含碳物质的碳同位素组成具有决定性的作用。最后，利用碳同位素组成值进行质量平衡计算，建立了草海区域碳循环的简单模式。 |
| Other Abstract | The δ~(13)C values of dissolved C(DIC). cellulose of aquatic plants, organic matter and carbonate in sediments were measured at Lake Caohai. The measured δ~(13)C range vs. PDB was -2.7‰～-10.6‰ for DIC: -15.5‰～-20‰ for cellulose of aquatic plants: -20.5‰～-26.7‰ for organic matter: -4.4‰～-13.1‰ for carbonate. The δ~(13)C of DIC changed greatly in Lake Caohai, the δ~(13)C of cellulose of aquatic plants in this lake was much heavier than C3 plants: The δ~(13)C values of DIC decreased with water depth, and the δ~(13)C values of organic matter and carbonate decreased with sediment depth. These features and trends were due primarily to photosynthesis-resipiration of aquatic plants and decomposition of organic matter. At last author built a carbon cycle model of Caohai through C and ~(13)C mass balance calculation. |
| Pages | 54 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/3948 |
| Collection | 研究生_研究生_学位论文 |
| Recommended Citation GB/T 7714 | 张军. 草海湖泊系统稳定碳同位素地球化学及其碳循环的简单模式[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,1994. |
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