报告详情
Response of periphyton fatty acids to experimental changes in aqueous phosphorus
编号：1692
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更新：2024-04-11 17:32:27 浏览：683次
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摘要
- Periphyton is an important basal food source for many aquatic consumers by directly or indirectly providing long-chain polyunsaturated fatty acids (LC-PUFA). Despite the fact that periphyton LC-PUFA content is very sensitive to aquepus nutrients, many prior studies were conducted in low nutrient rivers, while less is known about how periphyton LC-PUFA content may change in response to higher nutrient variation in eutrophic rivers.
- We conducted a periphyton culturing experiment by manipulating a gradient of aquepus nutrient concentrations from 0.002 to 0.18 mg P/L to investigate how aquepus nutrients affect periphyton fatty acids (FA) profiles from oligotrophic to eutrophic waters .
- Our results showed a significant curvilinear regressions relationship between aquepus nutrients and periphyton FA content. In oligotrophic conditions, periphyton LC-PUFA increased as aquepus nutrients increased, whereas in eutrophic waters, periphyton LC-PUFA decreased as aquepus nutrients increased. The tipping point of the effect of aquepus nutrients on periphyton LC-PUFA was predicted at 0.1 mg P/L. Variation in periphyton PUFA (EPA, ALA and LIN) were positively correlated with the density of alge, respectively diatoms, chlorophytes and cyanobacteria, which may be one of the reasons leading to variations in periphyton FA.
- Further, periphyton biomass experienced a significant increase with elevated aquepus nutrients, which was different to the relationship between periphyton LC-PUFA and aquepus nutrients. It was reflected the relative importance of food quality and food quality for aquatic consumers under different water nutrient conditions.
- Our study detected the response of periphyton FA to aquepus nutrients from oligotrophic to eutrophic conditions, and predicted tipping point provides a reference for the protection of aquatic consumers. Our results highlight that periphyton food quality should be considered in the future conservation of river food webs.
关键词
Food quality; Food webs; Diatoms; Aquatic consumers; Fish
报告人
周博玮
硕士研究生 广东工业大学稿件作者
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重要日期
-
会议日期
05月17日
2024
至05月20日
2024
-
03月31日 2024
初稿截稿日期
-
03月31日 2024
报告提交截止日期
-
05月20日 2024
注册截止日期
主办单位
青年地学论坛理事会
承办单位
厦门大学近海海洋环境科学国家重点实验室
中国科学院城市环境研究所
自然资源部第三海洋研究所
中国科学院城市环境研究所
自然资源部第三海洋研究所
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