海水和沉积物中的碳动态:贝类和海藻海洋养殖系统的案例研究
Lili Xu1, Yufeng Yang1, Zongbin Cui2
1Institute of Hydrobiology, Jinan University/Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou, 510632, China.
Marine environmental research
|December 11, 2024
概括
贝类和海藻的海洋养殖对溶解有机物 (DOM) 和碳循环产生重大影响. 海藻种植显示出更高的碳捕获潜力,使综合农业有利于沿海生态系统.
科学领域:
- 海洋生态海洋生态学
- 生物地质化学生物地质化学
- 水产养殖是水产养殖的一种方式.
背景情况:
- 贝类和海藻是中国的关键水产养殖物种,对海洋溶解有机物 (DOM) 生产作出了重大贡献.
- 海洋养殖物种的DOM生产影响海洋碳循环,对碳捕集和分解有影响.
- 了解DOM特征对于评估水产养殖对环境的影响至关重要.
研究的目的:
- 评估在海水和沉积物中贝类和海藻生长期间DOM的变化.
- 评估广东省的贝类和海藻水产养殖的碳去除和封存潜力.
- 为集成的贝类和海藻养殖实践提供建议.
主要方法:
- 在中国广东省南进行现场采样,从水产养殖区收集海水和沉积物样本.
- 溶解有机物 (DOM) 特性分析,包括芳香性和疏水性.
- 基于2012年至2021年水产养殖数据的碳去除和封存率的估计.
主要成果:
- 贝类和海藻种植都增加了海水和沉积物中的有机碳含量.
- 来自海藻的DOM表现出更高的芳香度和疏水性,表明更强的抗分解性和耐火溶解有机碳 (RDOC) 积累的潜力.
- 贝类种植的平均碳排放量为227.81 Gg C yr−1,而海藻种植的平均碳排放量为22.95 Gg C yr−1,其中排放量为11.89 Gg C yr−1.
结论:
- 与贝类相比,海藻水产养殖具有相当大的碳捕集潜力.
- 综合性贝类和海藻养殖为环境带来了巨大的好处,包括营养吸收和减轻环保和海洋酸化.
- 对于沿海发展中国家来说,推广综合贝类和海藻养殖是值得的,以提高生态服务和社会经济效益.
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