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.

细菌纤毛是浮游食品网的重要组成部分。 它们可以消耗大量细菌生产，并将其在必需脂质（细菌生物量和碎屑）中低的材料转化为富含脂质的纤毛生物量。 消费者如何从这些纤毛中从营养中受益，以及它们在纤毛碳的生化转化中起什么作用？ 为了调查纤毛脂质的性质及其在海洋食品网络中的命运和重要性，Harvey博士和麦克马纳斯（McManus）和麦克马纳斯（McManus）将： - 识别和量化纤毛脂质，尤其是那些在营养研究中可能具有特定于组的生物标志物的纤毛脂质。 - 检查纤毛饮食中脂质的来源，并遵循纤毛的同化和修饰饮食脂质。 - 测量其主要消费者之一CopePods对纤毛脂质的同化和转化。 该项目将生化测量与喂养实验相结合。 许多纤毛物种的详细脂质分析将首先提供有关它们已经观察到的独特化合物无处不在的其他数据。 他们将详细介绍饮食对脂质含量和几种代表性细菌纤毛的分布的作用。 最后，他们将进行深入的喂养实验，以遵循放牧copepods的纤毛脂质的结合和转化。 这些结果将提供有关细菌纤毛在海洋食品网络中的作用的大量新信息，尤其是它们在Copepod营养中的重要性。