脱化在全球自然生态系统中主导着不相似的酸盐减少
Danli Deng1,2, Gang He2, Bangjing Ding2
1Hubei Field Observation and Scientific Research Stations for Water Ecosystem in Three Gorges Reservoir, China Three Gorges University, Yichang, China.
Global change biology
|March 27, 2024
概括
脱化是全球主要的微生物酸盐减少过程,超过无氧氨氧化 (anammox) 和异样化酸盐降解 (DNRA). 环境因素影响这些循环路径,对生态系统的平衡至关重要.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学循环的过程
- 生态系统生态学生态学
背景情况:
- 生态系统中的 (N) 损失和回收受微生物酸盐减少过程的控制.
- 脱化,无氧氧化 (anammox) 和异样化酸盐降解为 (DNRA) 是关键的竞争途径.
- 这些N循环过程的全球模式和驱动因素仍然不明,这阻碍了准确的全球N平衡评估和管理.
研究的目的:
- 确定脱的全球模式和驱动因素,anammox和DNRA对酸盐减少的贡献.
- 评估这些过程在各种生态系统中的相对重要性.
- 为全球N循环模型和可持续的N管理战略提供信息.
主要方法:
- 编制了来自陆地和水生生态系统的1570次观测的全球数据集.
- 分析了脱,anammox和DNRA对总酸盐减少的相对贡献.
- 研究了环境因素 (如土壤有机碳,,酸盐,铁) 对工艺贡献的影响.
主要成果:
- 排占全球酸盐减少的66.1%,河口和沿海生态系统的贡献更高.
- 阿纳莫克斯和DNRA分别为12.7%和21.2%的酸盐减少.
- 脱的贡献随着经度的增加而增加,而anammox和DNRA的减少;碳,,酸盐和铁度等环境因素是关键驱动因素.
结论:
- 与anammox和DNRA相比,脱化在生态系统的酸盐转化中发挥着主导作用.
- 了解这些微生物过程对于完善全球N循环模型至关重要.
- 这些发现支持改善可持续管理实践.
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