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：养分和 DOC 的相互作用 有些湖泊是蓝色的，但大多数是绿色或棕色的。 我们对富营养化有了很多了解，富营养化是使湖泊变绿并导致令人讨厌的藻类大量繁殖的过程。 营养不良是使湖泊变成棕色的过程，人们对它知之甚少，但它与渔业、进出湖泊的气体流动以及汞等金属的循环有着重要的相互作用。 该项目将研究控制湖泊营养不良和富营养化的生物地球化学输入和食物网结构的相互作用。 我们将量化导致湖泊生态系统状态变化的条件，并评估生态系统生产、呼吸、气体交换和鱼类生产能源的反应。 这项研究是湖泊学家、微生物生态学家、生物地球化学家和鱼类生态学家的合作研究。 我们将开展为期三年的全湖实验和建模研究计划，以找出与富营养化和营养不良转变相关的机制、反应率和限制因素，反之亦然。