Collaborative: Alternate States and Ecosystem Metabolism In Lakes: Interactions of Nutrients and DOC

协作：湖泊中的交替状态和生态系统代谢：营养物和 DOC 的相互作用

• 批准号: 9509595
• 负责人: James Kitchell
• 金额: $ 76.34万
• 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: 1996
• 资助国家: 美国
• 起止时间: 1996-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9509595&HistoricalAwards=false
• 关键词: Collaborative; Alternate; States; Ecosystem; Metabolism

Collaborative: Alternate States and Ecosystem Metabolism in Lakes: Interactions of Nutrients and DOC Some lakes are blue, but most are green or brown. We have learned a great deal about eutrophication, the process that turns lakes green and leads to nuisance blooms of algae. Dystrophy, the process that turns lakes brown, is less understood but has important interactions with fisheries, gas flow to and from lakes, and cycling of metals such as mercury. This project will study the interactions of biogeochemical inputs and food web structure that control dystrophy and eutrophy in lakes. We will quantify conditions that lead to change in lake ecosystem state, and assess responses of ecosystem production, respiration, gas exchange, and energy sources for fish production. This research is a collaborative study by limnologists, microbial ecologists, biogeochemists and fish ecologists. We will conduct a three year program of whole lake experiments and modeling studies to find the mechanisms, response rates, and constraints associated shifts from eutrophy to dystrophy and vi ce versa.

合作：湖泊中的交替状态和生态系统代谢：营养物质和DOC的相互作用一些湖泊是蓝色的，但大多数是绿色或棕色的。我们已经学到了很多关于富营养化的知识，富营养化是让湖泊变绿并导致藻类滋生的过程。营养不良是将湖泊变成棕色的过程，人们对此知之甚少，但与渔业、进出湖泊的气体流动以及汞等金属的循环有重要的相互作用。该项目将研究生物地球化学输入和控制湖泊营养不良和富营养化的食物网络结构之间的相互作用。我们将量化导致湖泊生态系统状态变化的条件，评估生态系统生产、呼吸、气体交换和渔业生产能源的响应。这项研究是由湖泊学家、微生物生态学家、生物地球化学家和鱼类生态学家共同进行的研究。我们将进行为期三年的全湖实验和模型研究，以找出从营养正常到营养不良以及反之亦然的机制、响应率和约束条件。