Workshop: Respiration Regimes in River Networks: A cross-biome perspective; September, 2018; Valais, Switzerland

研讨会：河流网络中的呼吸机制：跨生物群落的视角；

• 批准号: 1832012
• 负责人: James Heffernan
• 金额: $ 4.99万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-05-01 至 2019-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1832012&HistoricalAwards=false
• 关键词: Workshop; Respiration; Regimes; River; Networks

This workshop aims to understand how and why the breakdown of organic material (heterotrophic respiration) varies over time in streams, and how and why this timing differs among streams and rivers of different sizes and in different parts of the world. Recent development of inexpensive oxygen sensors have allowed the widespread collection of multi-year continuous records of oxygen concentration, which can be used to precisely measure the timing of respiration. Organic matter may be produced in the stream by algae and other aquatic plants, or may be produced by terrestrial plants, and later be delivered to streams and rivers as falling leaves, as eroded particles of soil, or dissolved in water that flows from hillslopes to channels. These organic matter sources support the growth of animals higher in the food chain, such as insects and fish, and also provide energy for microorganisms that remove pollutants. The balance of photosynthesis and respiration in streams also influences the production of greenhouse gases such as carbon dioxide. Because organic matter can enter streams in many different ways, and because different kinds of organic matter break down at different rates, the timing of energy supply to streams also is likely to differ among streams, and to respond to many different aspects of environmental change. This award will support strengthen and broaden the scientific workforce by supporting participation of US scientists from different career stages, regions, and backgrounds in an international conference that addresses topics at the leading edge of environmental data science; will strengthen existing connections between US and international scientists and establish new ones; and will increase the use of a newly-developed online portal (StreamPULSE; data.streampulse.org) for storage, sharing, and analysis of stream photosynthesis and respiration data to an international workshop to develop and test ideas about the connections between the timing of organic matter supply and the timing of its decomposition, and how environmental change may alter these patterns.The aim of this conference is to simultaneously advance the conceptual and technical understanding of respiration and heterotrophy in streams and rivers. First, this conference will produce a conceptual model of aquatic heterotrophy that links forms, mechanisms, and timing of organic matter input to temporal patterns in respiration, drawing on case studies from intensive study of organic matter and respiration dynamics at diverse sites around the world. Second, this conference will evaluate statistical methods to improve the estimation and interpretation of respiration dynamics from continuous time series of oxygen and other variables including carbon dioxide. Finally, we will integrate these technical and conceptual advances by empirically linking the dynamics of respiration to remotely-sensed estimates of organic matter supply in forested streams.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

本次研讨会旨在了解有机物质的分解（异养呼吸）如何以及为什么在溪流中随着时间的推移而变化，以及如何以及为什么这种时间在世界不同地区的不同大小的溪流和河流之间存在差异。 最近开发的廉价氧传感器已经允许广泛收集多年连续的氧浓度记录，其可用于精确测量呼吸的时间。 有机物可能是由藻类和其他水生植物在溪流中产生的，也可能是由陆生植物产生的，后来作为落叶、土壤侵蚀颗粒或溶解在从山坡流向渠道的水中被输送到溪流和河流中。 这些有机物质来源支持食物链中较高的动物（如昆虫和鱼类）的生长，并为微生物提供能量，以去除污染物。溪流中光合作用和呼吸作用的平衡也会影响二氧化碳等温室气体的产生。 由于有机物可以以许多不同的方式进入河流，并且由于不同种类的有机物以不同的速率分解，因此向河流提供能量的时间也可能因河流而异，并对环境变化的许多不同方面作出反应。 该奖项将通过支持来自不同职业阶段、地区和背景的美国科学家参加国际会议来支持加强和扩大科学队伍，该会议讨论环境数据科学前沿的主题;将加强美国和国际科学家之间的现有联系并建立新的联系;并将增加新开发的在线门户网站（StreamPULSE; www.example.com）的使用data.streampulse.org，存储，共享和分析流光合作用和呼吸数据的国际研讨会，以开发和测试有关有机物供应的时间和其分解的时间之间的联系，以及环境变化如何可能改变这些模式的想法。本次会议的目的是同时推进呼吸和河流异养的概念和技术理解。 首先，本次会议将产生一个水生异养的概念模型，该模型将有机物输入的形式，机制和时间与呼吸的时间模式联系起来，借鉴了世界各地不同地点有机物和呼吸动力学深入研究的案例研究。 其次，本次会议将评估统计方法，以改善从氧气和包括二氧化碳在内的其他变量的连续时间序列中对呼吸动力学的估计和解释。最后，我们将整合这些技术和概念的进步，经验联系呼吸的动态遥感估计的有机物供应在森林stream.This奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

Thinking like a consumer: Linking aquatic basal metabolism and consumer dynamics

像消费者一样思考：将水生基础代谢与消费者动态联系起来

• DOI: 10.1002/lol2.10172
• 发表时间: 2020
• 期刊: Limnology and Oceanography Letters
• 影响因子: 7.8
• 作者: Rüegg, Janine;Conn, Caitlin C.;Anderson, Elizabeth P.;Battin, Tom J.;Bernhardt, Emily S.;Boix Canadell, Marta;Bonjour, Sophia M.;Hosen, Jacob D.;Marzolf, Nicholas S.;Yackulic, Charles B.
• 通讯作者: Yackulic, Charles B.