Study on effect of exogenous microbial consortia on lipid variations during the degradation of <i>Ulva prolifera</i> in seawater system

Fang Minghuan; Ding Haibing; Wang Yong; Yu Gaofeng

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Fang Minghuan，Ding Haibing，Wang Yong, et al. Study on effect of exogenous microbial consortia on lipid variations during the degradation of Ulva prolifera in seawater system[J]. Haiyang Xuebao，2025, 47(x)：1–16

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Fang Minghuan，Ding Haibing，Wang Yong, et al. Study on effect of exogenous microbial consortia on lipid variations during the degradation of Ulva prolifera in seawater system[J]. Haiyang Xuebao，2025, 47(x)：1–16

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Study on effect of exogenous microbial consortia on lipid variations during the degradation of Ulva prolifera in seawater system

Fang Minghuan^{1, 2, 3
,},
Ding Haibing^{1, 2, 3, 4
,
,},
Wang Yong⁵,
Yu Gaofeng⁵

1.
Frontier Science Center for Deep Ocean Multipheres and Earth System, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Maine Chemistry Theory and Engeering, Ocean University of China, Qingdao 266100, China
3.
Ministry of Education and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
4.
Marine Ecology and Environmental Science Laboratory, Laoshan Laboratory, Qingdao 266237, China
5.
Qingdao Hao Ao Environmental Protec-tion Company Ltd., Qingdao 266071, China

Received Date: 2023-09-18
Rev Recd Date: 2025-03-17

Available Online: 2025-05-20

Abstract

Abstract

A series of seawater culture experiments were conducted to simulate the degradation of Ulva prolfiera in coastal area under the influence of exogenous degradation microbial consortia The degradation mechanism of Ulva prolifera in seawater under the influence of the exogenous degradation microbial consortia was investigated by tracking the time-dependent changes of lipid biomarkers in culture system. The results showed that for most of the fatty acids (14:0, i-15:0 + a-15:0, 16:0, 16:1ω7, 17:0, 18:0, 18:1ω7, 18:1ω9, 18:3, 18:4, 20:0, 22:0) and neutral lipids of Ulva Prolifera in different forms, their contents presented trends of first rapid decline and followed by a slow decline or maintain stability in the culture system with and without exogenous microbial consortia. Under the influence of exogenous microbial consortia, the degradation efficiency of fatty acid was generally increased by 10%−20%, while that of neutral lipids increased by 15−25%. The multi-G model was applied to fit the degradation processes of several fatty acids and neutral lipids, the results showed that the lipids could be divided into fast and slow degradation fractions in the culture system, and their degradation rates were improved in different degrees, with the range of 20% to 30% with the addition of the exogenous microbial consortia. Under the influence of the exogenous microbial consortia, there was no significant difference in the degradation efficiency and rates of different fatty acids in Ulva prolifera. In seawater, the degradation efficiency and rates of lipids in bound forms were significantly higher than that of their free forms, indicating that the existence forms of lipids of Ulva prolifera had significant effect on their degradation processes. The addition of exogenous degradation microbial consortia increased the degradation rate constants of the slow degradation fractions of the lipids in Ulva Prolifera, thereby promoted its overall degradation .
- Ulva prolifera,
- neutral lipids,
- fatty acids,
- degradation microbial consortia,
- organic matter degradation.

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References(38)

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