Bacterivorous Ciliates in Marine Food Webs: Lipid Chemistry and Copepod Nutrition

海洋食物网中的食菌纤毛虫：脂质化学和桡足类营养

• 批准号: 9203478
• 负责人: George McManus
• 金额: --
• 依托单位: Marine Environmental Sciences Consortium
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-01 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9203478&HistoricalAwards=false
• 关键词: Bacterivorous; Ciliates; Marine; Food; Webs

Bacterivorous ciliates are an important component of planktonic food webs. They can consume a large proportion of bacterial production, and convert material that is low in essential lipids (bacterial biomass and detritus) into lipid-rich ciliate biomass. How do consumers benefit nutritionally from these ciliates, and what role do they play in the biochemical transformation of ciliate carbon? To investigate the nature of ciliate lipids and their fate and importance in the marine food web Dr. Harvey and McManus will: - identify and quantify ciliate lipids, especially ones that may be useful as group-specific biomarkers in trophic studies. - examine sources of lipids in the ciliate diet and follow how ciliates assimilate and modify dietary lipids. - measure the assimilation and transformation of ciliate lipids by one of their principal consumers, copepods. This project combines biochemical measurements with feeding experiments. Detailed lipid analysis of a number of ciliate species will first provide additional data on the ubiquity of the unique compounds they have already observed. They will measure in detail the role of diet on lipid content and distribution of several representative bacterivorous ciliates. Finally, they will conduct in-depth feeding experiments to follow the incorporation and transformation of ciliate lipids by grazing copepods. These results will provide substantial new information on the role of bacterivorous ciliates in the marine food web, especially their importance in copepod nutrition.

食菌纤毛虫是浮游生物的重要组成部分， 食物网 它们可以消耗大量的细菌 生产，并转化低必需脂质的物质 （细菌生物质和碎屑）转化为富含脂质的纤毛虫生物质。 消费者如何从这些纤毛虫中获得营养， 它们在纤毛虫的生化转化中起什么作用 碳？ 研究纤毛虫脂质的性质及其命运， 海洋食物网的重要性哈维博士和麦克马纳斯将： - 识别和量化纤毛虫脂质，特别是那些可能 在营养学研究中可用作组特异性生物标志物。 - 研究纤毛虫饮食中脂质的来源，并遵循如何 纤毛虫同化并改变食物中的脂类。 - 测量纤毛虫脂质的同化和转化 桡足类是它们的主要消费者 该项目将生化测量与喂养相结合 实验 一些纤毛虫的详细脂质分析 物种将首先提供关于物种普遍存在的额外数据。 他们已经观察到的独特化合物。 他们将在 详细说明饮食对脂质含量和分布的作用， 几种典型的食菌纤毛虫。 最后，他们会 进行深入的喂养实验， 以及食草桡足类对纤毛虫脂质的转化。 这些结果将提供大量的新信息的作用 海洋食物网中的食菌纤毛虫，特别是 桡足类营养的重要性。