BE/CBC: The Vertical Organization of Energy, Carbon, and Nutrient Cycles in an Ultraoligotrophic Ecosystem: A Workshop on Crater Lake, Oregon

BE/CBC：超寡营养生态系统中能量、碳和养分循环的垂直组织：俄勒冈州火山口湖研讨会

• 批准号: 0221908
• 负责人: Robert Collier
• 金额: $ 4.65万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0221908&HistoricalAwards=false
• 关键词: CBC; Vertical; Organization; Energy; Carbon

This award will support, under the aegis of the Biocomplexity in the Environment initiative, a conference at Oregon State University to examine the vertical organization of energy, carbon, and nutrient cycles in Crater Lake, Oregon. The unusual properties of this ultra-oligotrophic lake result in the vertical stratification of the ecosystem reminiscent of pelagic marine systems. Crater Lake provides a natural laboratory to study the coupling of biological processes, element cycles, and the physics of the environment.Specifically, the award will provide some organizational support for the workshop and travel and subsistence support for experienced and new investigators, as well as students, to participate in presentations and discussions that synthesize the latest scientific understanding of Crater Lake and nutrient cycling. Discussions will also involve how best to proceed in the future to increase our knowledge of such ecosystems. Crater Lake, the deepest lake in the United States (i.e., 590 m), is a closed-basin caldera lake formed after the explosive eruption of Mt. Mazama, ~7700 years ago. The lake, which rests at an elevation of 1882 meters in the Cascade Mountains of south central Oregon, is surrounded by steep caldera walls and has a very small watershed. There are no major inlet streams and no surface outlet. External inflows of nutrients to the lake are low and dominated by precipitation and dry deposition from the atmosphere. Thus, the lake is ultra-oligotrophic and one of the clearest bodies of water on the earth. In spite of its great depth, vertical mixing is relatively rapid (i.e., 3-5 years) and recycled nitrogen is mixed upwards from the hypolimnion representing the largest source of this limiting nutrient.Crater Lake is the centerpiece of one of the premier National Parks in the United States and it provides a unique setting to directly engage the public with compelling educational experiences demonstrating the function of complex aquatic ecosystems and the methods of interdisciplinary field research. It offers a unique resource for the study of the interaction of atmospheric forcing and land surface hydrology with biogeochemical cycles in aquatic ecosystems.

该奖项将支持，在环境倡议的生物复杂性的主持下，在俄勒冈州州立大学的会议，以检查在火山口湖，俄勒冈州的能源，碳和营养循环的垂直组织。这个超贫营养湖泊的不寻常的属性导致生态系统的垂直分层，让人想起远洋海洋系统。火山口湖提供了一个天然的实验室来研究生物过程，元素循环和环境物理学的耦合。具体来说，该奖项将为研讨会提供一些组织支持，并为经验丰富的和新的研究人员以及学生提供旅行和生活支持，以参与综合火山口湖和营养循环的最新科学认识的演讲和讨论。讨论还将涉及今后如何以最佳方式开展工作，以增加我们对此类生态系统的了解。火山口湖，美国最深的湖泊（即，590米），是一个封闭的盆地火山口湖后形成的火山爆发的山。马扎马，约7700年前。这个湖位于俄勒冈州中南部的喀斯喀特山脉，海拔1882米，周围是陡峭的火山口墙，有一个非常小的分水岭。没有主要的入口水流，也没有地面出口。营养物质的外部流入湖泊是低，并从大气中的降水和干沉降为主。因此，该湖是超贫营养的，是地球上最清澈的水体之一。尽管其深度很大，但垂直混合相对较快（即，3-5火山口湖是美国首屈一指的国家公园之一的核心，它提供了一个独特的环境，直接吸引公众参与，展示复杂水生生态系统的功能和跨学科实地研究的方法。它为研究大气强迫和陆地表面水文与水生生态系统中的地球化学循环的相互作用提供了独特的资源。