Collaborative Research: RUI: Alternative Carbon Sources for Lake Food Webs

合作研究：RUI：湖泊食物网的替代碳源

• 批准号: 0075111
• 负责人: James Hodgson
• 金额: $ 8.65万
• 依托单位: St. Norbert College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0075111&HistoricalAwards=false
• 关键词: Collaborative; Research; RUI; Alternative; Carbon

00-75107CarpenterCollaborative Research: Alternative carbon sources for lake food websMost ecosystems are viewed as driven by photosynthesis deriving from plants within the system's boundaries. Lakes in particular are textbook examples of how algae and aquatic plants support food webs including fish. Yet, plant production is often a poor predictor of fish and invertebrate production. Ecologists have long known that lakes receive significant inputs of organic matter from their watersheds. Recent work demonstrates that this terrestrial organic matter is potentially available, suggesting terrestrial organic matter may be significant in supporting lake food webs including top carnivores. This project will address this question by a series of whole lake additions of a stable isotope of carbon which will produce a strong contrast in isotopic composition between terrestrially-fixed carbon and carbon fixed by aquatic plants. Through a combination of stable isotope addition experiments and computer modeling, this research will provide an ecosystem-level test of the importance of the connections between terrestrial organic matter and aquatic food webs. Abstract00-75111HodgsonCollaborative Research: Alternative carbon sources for lake food websMost ecosystems are viewed as driven by photosynthesis deriving from plants within the system's boundaries. Lakes in particular are textbook examples of how algae and aquatic plants support food webs including fish. Yet, plant production is often a poor predictor of fish and invertebrate production. Ecologists have long known that lakes receive significant inputs of organic matter from their watersheds. Recent work demonstrates that this terrestrial organic matter is potentially available, suggesting terrestrial organic matter may be significant in supporting lake food webs including top carnivores. This project will address this question by a series of whole lake additions of a stable isotope of carbon which will produce a strong contrast in isotopic composition between terrestrially-fixed carbon and carbon fixed by aquatic plants. Through a combination of stable isotope addition experiments and computer modeling, this research will provide an ecosystem-level test of the importance of the connections between terrestrial organic matter and aquatic food webs.

00-75107 Carpenter合作研究：湖泊食物网的替代碳源大多数生态系统被视为由系统边界内植物的光合作用驱动。 特别是湖泊是藻类和水生植物如何支持包括鱼类在内的食物网的教科书例子。 然而，植物产量往往不能很好地预测鱼类和无脊椎动物的产量。 生态学家早就知道湖泊从其流域接收大量的有机物质。最近的工作表明，这种陆地有机物是潜在的，这表明陆地有机物可能是重要的支持湖泊食物网，包括顶级食肉动物。 该项目将通过一系列的全湖碳稳定同位素的添加来解决这个问题，这将在陆地固定碳和水生植物固定碳之间的同位素组成中产生强烈的对比。 通过稳定同位素添加实验和计算机模拟相结合，这项研究将提供一个生态系统水平的测试陆地有机物和水生食物网之间的联系的重要性。摘要00 - 75111霍奇森合作研究：湖泊食物网的替代碳源大多数生态系统被视为由系统边界内植物的光合作用驱动。 特别是湖泊是藻类和水生植物如何支持包括鱼类在内的食物网的教科书例子。 然而，植物产量往往不能很好地预测鱼类和无脊椎动物的产量。 生态学家早就知道湖泊从其流域接收大量的有机物质。最近的工作表明，这种陆地有机物是潜在的，这表明陆地有机物可能是重要的支持湖泊食物网，包括顶级食肉动物。 该项目将通过一系列的全湖碳稳定同位素的添加来解决这个问题，这将在陆地固定碳和水生植物固定碳之间的同位素组成中产生强烈的对比。 通过稳定同位素添加实验和计算机模拟相结合，这项研究将提供一个生态系统水平的测试陆地有机物和水生食物网之间的联系的重要性。