South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China.
South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou 510300, China; Institute of Hydrobiology, Jinan University, Guangzhou 510632, China.
Mar Pollut Bull. 2023 Dec;197:115797. doi: 10.1016/j.marpolbul.2023.115797. Epub 2023 Nov 18.
In large-scale seaweed farming, an understanding of the decomposition process plays a pivotal role in optimizing cultivation practices by considering the influence of the bacterial community. Therefore, we assessed the bacterial community structure and its influence on environmental factors during Gracilaria lemaneiformis decomposition, utilizing both microcosms and in-situ simulations. The decomposition rates in the microcosms and in situ simulations reached 79 % within 180 days and 81 % within 50 days, respectively In the microcosms, the dissolved oxygen content decreased from 5.3 to 0.4 mg/L, while the concentrations of total organic carbon, nitrogen, and phosphorus in the water increased by 165 %, 1636 %, and 2360 %, respectively. The common dominant bacteria included Proteobacteria, Planctomycetes, Firmicutes, Bacteroidetes, and Spirochaetae. Planctomycetes and Firmicutes were positively correlated with the total organic carbon, nitrogen, and phosphorus concentrations. Planctomycetes species played significant roles during the decomposition process. The overall findings of this study could inform more sustainable seaweed cultivation practices.
在大型海藻养殖中，通过考虑细菌群落的影响，了解分解过程对于优化养殖实践起着关键作用。因此，我们利用微宇宙和原位模拟评估了江蓠（Gracilaria lemaneiformis）分解过程中的细菌群落结构及其对环境因子的影响。在微宇宙和原位模拟中，分解率在 180 天内分别达到 79%和 50 天内达到 81%。在微宇宙中，溶解氧含量从 5.3 降至 0.4mg/L，而水中总有机碳、氮和磷的浓度分别增加了 165%、1636%和 2360%。常见的优势细菌包括变形菌门、浮霉菌门、厚壁菌门、拟杆菌门和螺旋体门。浮霉菌门和厚壁菌门与总有机碳、氮和磷浓度呈正相关。浮霉菌门的物种在分解过程中发挥了重要作用。本研究的总体结果可以为更可持续的海藻养殖实践提供信息。
