Collaborative Research: Alternative Carbon Source for Lake Food Webs

合作研究：湖泊食物网的替代碳源

基本信息

批准号：
0075107
负责人：
Stephen Carpenter
金额：
$ 47.71万
依托单位：
University of Wisconsin-Madison
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=0075107&HistoricalAwards=false
关键词：
Collaborative Research Alternative Carbon Source

项目摘要

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.

00-75107CARPENTercollaborative研究：湖食品网的替代碳源最多的生态系统被视为由系统边界内植物衍生而来的光合作用驱动。尤其是湖泊是藻类和水生植物如何支持包括鱼在内的食物网的教科书例子。然而，植物的生产通常是鱼类和无脊椎动物生产的差预测指标。长期以来，生态学家知道湖泊从流域收到有机物的大量投入。最近的工作表明，这种陆地有机物有可能可用，这表明陆地有机物在支持包括顶级食肉动物在内的湖泊食物网中可能很重要。该项目将通过一系列稳定的碳同位素的一系列整个湖泊来解决这个问题，该碳的同位素将在陆固定的碳和由水生植物固定的碳之间产生强大的对比度。通过稳定的同位素添加实验和计算机建模的结合，这项研究将对陆地有机物与水生食物网之间连接的重要性提供生态系统级测试。 Abstract00-75111 HodgsonCollaborative研究：湖泊食品网的替代碳源最多生态系统被视为由系统边界内植物衍生而来的光合作用驱动。尤其是湖泊是藻类和水生植物如何支持包括鱼在内的食物网的教科书例子。然而，植物的生产通常是鱼类和无脊椎动物生产的差预测指标。长期以来，生态学家知道湖泊从流域收到有机物的大量投入。最近的工作表明，这种陆地有机物有可能可用，这表明陆地有机物在支持包括顶级食肉动物在内的湖泊食物网中可能很重要。该项目将通过一系列稳定的碳同位素的一系列整个湖泊来解决这个问题，该碳的同位素将在陆固定的碳和由水生植物固定的碳之间产生强大的对比度。通过稳定的同位素添加实验和计算机建模的结合，这项研究将对陆地有机物与水生食物网之间连接的重要性提供生态系统级测试。