LTREB: Biogeochemical Mechanisms of Response in the Third Decade of Whole-Ecosystem Experimental Manipulations at the Bear Brook Watershed in Maine (BBWM)

LTREB：缅因州熊溪流域第三个十年全生态系统实验操作的生物地球化学响应机制（BBWM）

• 批准号: 0639902
• 负责人: Ivan Fernandez
• 金额: $ 44.2万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-02-15 至 2013-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0639902&HistoricalAwards=false
• 关键词: LTREB; Biogeochemical; Mechanisms; Response; Third

This grant will support the Bear Brook Watershed in Maine (BBWM) where research has been conducted for approximately 20 years on the effects of atmospheric sulfur and nitrogen deposition on forests. The research is conducted on two watersheds, each drained by a first order stream. One is treated bimonthly by helicopter to simulate atmospheric deposition of sulfur and nitrogen. Over the past 20 years, this research has identified and verified key factors governing forest response to air pollution, and also revealed major gaps in our understanding that are critical to determining the success of current and potential future regulations under the Clean Air Act and its amendments of 1990. Recent research is also studying how climate interacts with other air pollutants to determine water quality and forest health. This grant will support the project into the third decade where new ecological response mechanisms are emerging that can only be investigated by long-term, multi-decadal research. The broader impacts of this project include the training of undergraduate and graduate students who will be the scientific leaders of tomorrow. This research provides direct evidence of whole-ecosystem responses to chemical treatments that simulate air pollutants providing results not possible from controlled laboratory studies. The issue of acid deposition remains a concern for forest ecosystem health and water quality. There are also direct interactions between climate and acid deposition that few field research sites in the world are prepared to study. This research directly addresses those information needs for today and the future.

该赠款将支持缅因州（BBWM）的Bear Brook流域，在该流域进行了大约20年的研究，该研究已对大气硫和氮沉积对森林的影响进行了大约20年。 该研究是在两个流域进行的，每个流域都被一级流流水。 一个由直升机将一个人用直升机处理，以模拟硫和氮的大气沉积。 在过去的20年中，这项研究已经确定并验证了有关森林对空气污染反应的关键因素，并且还揭示了我们的理解中的主要差距，这对于确定1990年《清洁空气法》及其修正案根据《清洁空气法案》及其在1990年的修订中的成功至关重要。最近的研究还研究了气候与其他空气污染物的相互作用，以确定水质和森林健康。 该赠款将支持该项目到第三个十年，在新的生态反应机制中出现了，只能通过长期的多年学习研究才能研究。该项目的更广泛的影响包括对本科生和研究生的培训，他们将成为明天的科学领袖。 这项研究提供了整个生态系统对化学处理的反应的直接证据，这些反应模拟了空气污染物，从而提供了对受控实验室研究的结果。 酸性沉积问题仍然是森林生态系统健康和水质的关注点。 气候和酸沉积之间也有直接的相互作用，世界上很少有现场研究地可以研究。 这项研究直接解决了当今和未来的信息需求。