揭示环境变化的对红树林沉积物的影响 碳动态 红树林沉积物的碳动态
Frederick Asante1, Christiana Naana Sam2, Alexandra Marçal Correia3
1Department of Fisheries and Aquatic Sciences, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana; MARE - Marine and Environmental Sciences Centre/ARNET - Aquatic Research Network, Faculty of Sciences, Universidade de Lisboa, Lisbon, Portugal; Plant and Ecosystems Research Group, Department of Biology, University of Antwerp, Belgium; Systems Ecology and Resource Management (SERM) Research Unit, Université libre de Bruxelles (ULB), Brussel, Belgium.
The Science of the total environment
|July 19, 2024
概括
红树林沉积物有机物 (OM) 是由水pH,盐度和溶解氧 (DO) 调节的,沉积物颗粒大小在碳储存中起着关键作用,而不仅仅是沉积率.
科学领域:
- 沿海生态 沿海生态
- 环境科学 环境科学
- 海洋生物学 海洋生物学
背景情况:
- 红树林生态系统对于通过沉积物储存碳来调节气候至关重要.
- 对于影响红树林碳储存服务的环境影响的了解有限.
- 调查控制红树林沉积物有机物 (OM) 的因素对于保护至关重要.
研究的目的:
- 研究水文学因素和沉积物特征对红树林碳动态的空间和时间变化.
- 确定控制红树林沉积物有机物 (OM) 含量的关键变量.
- 了解沉积物特征在OM储存中的作用,超出沉积率.
主要方法:
- 在水文因素 (水温,pH,盐度,DO,流速,度) 的现场监测.
- 评估沉积率,沉积物的有机含量和颗粒度.
- 实验室分析使用燃烧损失和粒度测量方法对OM和沉积物颗粒大小量化.
主要成果:
- 水的pH值,盐度和溶解氧 (DO) 被确定为沉积物OM的关键调节剂.
- 观察到DO和OM之间的正相关性,可能与光合作用和淡水流入有关.
- 沉积物颗粒大小,特别是较粗的碎片 (500和2000微米),与OM有显著的正相关性,超过了沉积率的影响.
结论:
- 水文因素和沉积物颗粒大小是红树林生态系统中碳动态的关键决定因素.
- 沉积物特性,特别是粒度大小,对OM储存的影响比单独沉积率更大.
- 这些发现为管理红树林生态系统和保护它们的碳捕集服务提供了关键的见解.
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