Refractory dissolved organic carbon produced by cultivated kelp Saccharina japonica during different stages
文献类型： 外文期刊
作者： Wu, Wenguang 1 ; Zhang, Jihong 2 ; Liu, Yi 2 ; Wang, Xinmeng 2 ; Yang, Jun 2 ; Sun, Wei 2 ; Kang, Qinzi 2 ;
作者机构： 1.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Shandong, Peoples R China
3.Qingdao Marine Sci & Technol Ctr, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266237, Shandong, Peoples R China
关键词： Mariculture kelp; Refractory dissolved organic carbon; Colored dissolved organic matter; Microbial community; Sanggou Bay
期刊名称：AQUACULTURE （ 影响因子：3.9； 五年影响因子：4.4 ）
ISSN： 0044-8486
年卷期： 2025 年 596 卷
页码：
收录情况： SCI
摘要： Large-scale mariculture of kelp Saccharina japonica will form a large amount of refractory dissolved organic carbon (RDOC) to achieve long-term carbon sequestration. However, the formation process and quantification of RDOC in kelp mariculture are not well understood. The RDOC during the whole kelp mairculture cycle were directly assessed and measured using multidisciplinary analysis technology. The results showed that approximately 50.69-74.66 % of the labile dissolved organic carbon (LDOC) and 14.54-21.51 % of the semi-labile dissolved organic carbon (SLDOC) were gradually degraded over a period of up to 200 days. Actinobacteria, Gammaproteobacteria and Alphaproteobacteria predominantly drove the conversion of LDOC released by kelp to RDOC during the mushroom, adult and mature stages, respectively. In the whole kelp mariculture cycle, the formation amount of RDOC was estimated to be approximately 9.4 g C center dot ind-1 center dot yr-- 1 center dot yr- 1 , and the formation amount of RDOC accounts for approximately 18.91 % of the carbon storage from kelp biomass. These stable RDOC should be included in the blue carbon budgets of mariculture kelp.
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