溶解碳的巨大变化发生在农业流域内的小池中
Jianing Chen1, Min Luo2, Qitao Xiao3
1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing 210044, China.
The Science of the total environment
|September 11, 2024
概括
人类活动在小型农业池中对溶解有机碳 (DOC) 和溶解无机碳 (DIC) 产生重大影响. 了解这些因素对于水生碳循环至关重要.
科学领域:
- 环境科学 环境科学
- 临界技术 临界技术
- 生物地质化学生物地质化学
背景情况:
- 小池在全球范围内非常丰富,特别是在农业地区,但它们的碳动力学知之甚少.
- 溶解有机碳 (DOC) 和溶解无机碳 (DIC) 对水生碳预算和生态系统功能至关重要.
- 在小池中DOC和DIC的变化及其驱动因素仍未得到充分研究,这阻碍了对内陆水的碳循环的理解.
研究的目的:
- 调查在小池中DOC和DIC度的变化.
- 确定影响DOC和DIC水平的驱动因素.
- 为了比较碳动态跨池与不同的功能 (污水,灌,自然) 在一个农业流域.
主要方法:
- 在中国东部一个典型的农业流域进行了一年的实地调查.
- 在各种池类型中测量DOC和DIC度:污水,灌和自然池.
- 分析了碳度和环境变量 (营养素,叶绿素a,降水,温度) 之间的相关性.
主要成果:
- 人类活动使污水和灌池中的DOC和DIC水平明显增加,与天然池相比.
- 在污水和灌池中,DOC较高,而在灌池中,DIC达到峰值.
- 在DOC/DIC和营养物质/叶绿素a之间观察到正相关性,表明人类活动的直接和间接影响.
- 降水通过影响陆地输入和稀释影响了DOC和DIC,而温度则影响了初级生产力和新陈代谢.
结论:
- 人类活动和自然因素 (降水,温度) 是小型池中DOC和DIC变化的关键驱动因素.
- 了解这些影响对于准确评估人类影响的小型水生生态系统的碳动态至关重要.
- 该研究强调了人为影响在这些普遍存在的水体内的碳循环中的重要作用.
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