鱼类养殖产生的大量碳投入降低了宏观藻类海洋养殖地区的碳捕集能力
Wei Yang1, Yingxu Wu2, Yanmei Liu1
1Polar and Marine Research Institute, College of Harbor and Coastal Engineering, Jimei University, Xiamen, 361000, PR China.
Marine environmental research
|September 13, 2025
概括
综合水产养殖虽然用于海洋二氧化碳去除 (mCDR),但可以将沿海系统转化为二氧化碳来源. 养殖渔业显著增加二氧化碳水平,压倒海藻.
科学领域:
- 海洋生态海洋生态学
- 水产养殖是水产养殖的一种方式.
- 碳生物地质化学 碳生物地质化学
背景情况:
- 宏观藻类海洋养殖是为了海洋二氧化碳去除 (mCDR) 而推广的.
- 综合水产养殖 (与鱼类和贝类共同培养大藻类) 复杂化了碳预算.
- 综合水产养殖中的碳酸盐系统反应尚未得到充分探索,重点往往是有机碳.
研究的目的:
- 调查东亚主要水产养殖区 (桑沙湾) 的季节性碳酸盐系统反应.
- 量化不同热带群体 (海藻,贝类,鱼类) 对二氧化碳部分压力 (pCO2) 的影响.
- 识别海洋养殖系统中溶解无机碳 (DIC) 和pCO2增加的来源.
主要方法:
- 在桑沙湾进行季节性调查,这是一个大规模的水产养殖地区.
- 测量了海面二氧化碳的部分压力 (pCO2) 和空海二氧化碳流.
- 分析溶解的无机碳稳定碳同位素 (δ13C_DIC),以确定碳来源.
主要成果:
- 桑沙湾在冬季,春季和秋季持续排放二氧化碳,pCO2达到500-1100μatm.
- 海藻种植降低了pCO242μatm;贝类养殖增加了36μatm;鱼类养殖增加了375μatm.
- 养殖鱼类的平均pCO2增加到~567μatm,将海湾从二氧化碳汇转变为二氧化碳的来源;海藻和鱼类料的分解有助于增加DIC和pCO2.
结论:
- 综合水产养殖,特别是鱼类养殖,可以否定巨藻的二氧化碳封存潜力.
- 桑沙湾的高DIC和pCO2是由鱼的料呼吸和残留海藻分解驱动的.
- 减少配方料或开发环保的养殖方法对于有效的mCDR和环境保护至关重要.
相关概念视频
Primary Production
25.1K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
25.1K
Other Algae
412
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
412
Green Algae
719
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
719
Overview of Algae
701
The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
701
Bioremediation
22.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
22.1K
The Carbon Cycle
43.2K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
43.2K


