在中国的一个大型种植区中,巨藻培养引起的碳沉积
Yingying Wang1, Weifeng Yang2, Yihua Cai1
1State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
Environmental science and pollution research international
|September 23, 2023
概括
大藻种植对沉积的碳汇产生了很小的贡献,大藻衍生的碳占有总有机碳的不到35%. 这表明在桑沙湾内碳封存中的作用有限,但显著.
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
- 碳循环是碳循环的过程.
背景情况:
- 沉积物碳汇对海洋生态系统至关重要.
- 大藻种植在碳封存中的作用仍然没有得到充分的研究.
- 了解海洋沉积物中的碳来源对于气候变化研究至关重要.
研究的目的:
- 为了研究大藻类对沉积碳汇的贡献.
- 量化山沙湾的宏藻衍生的有机碳总量 (TOC).
- 评估巨藻种植对碳捕获的意义.
主要方法:
- 在沉积物中分析总有机碳 (TOC),总 (TN) 和稳定的碳同位素 (δ13C).
- 应用三端混合模型来识别碳来源.
- 估计大藻衍生TOC (TOCma) 和其对整体碳沉积物的贡献.
主要成果:
- 宏藻衍生TOC (TOCma) 占TOC总量的不到35%,平均为16%±9%.
- 陆地和植物浮游植物衍生的TOC更为显著,分别为24%±17%和60%±20%.
- 大藻种植每年占碳汇量8.2×10^3,约占大藻产量的8%±6%.
结论:
- 与植物浮游生物相比,宏藻种植对沉积碳汇的贡献相对较小.
- 尽管其规模有限,但大藻诱导的碳捕集在局部海洋环境中值得考虑.
- 需要进一步的研究,才能充分了解宏培养对碳循环的长期影响.
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