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

合作：交替状态和湖泊生态系统代谢：营养物和DOC的相互作用有些湖泊是蓝色的，但大多数是绿色或棕色。 我们已经了解了很多关于富营养化的知识，富营养化是使湖泊变绿色并导致藻类大量繁殖的过程。 营养不良是使湖泊变成棕色的过程，人们对它的了解较少，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，气体交换和能源对鱼类生产的响应。 这项研究是由湖沼学家，微生物生态学家，生物化学家和鱼类生态学家合作进行的。 我们将进行一个为期三年的全湖实验和建模研究计划，以找到从富营养化到营养不良的机制，响应率和相关的限制，反之亦然。

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.