Collaborative Research: Scales and drivers of variability in dissolved organic carbon across diverse urban watersheds

合作研究：不同城市流域溶解有机碳变异的规模和驱动因素

• 批准号: 2333154
• 负责人: Rebecca Hale
• 金额: $ 93.5万
• 依托单位: Smithsonian Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-03-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2333154&HistoricalAwards=false
• 关键词: Collaborative; Research; Scales; drivers; variability

Most ecosystems are impacted by human activities to some degree, but this can vary considerably beteween locations. For example, cities differ in their impacts on streams and rivers depending on age, storm water infrastructure, amount of green space, and other factors of the built environment. Natural factors such as climate (temperature and precipitation) and geology also affect how different cities influence water quality and quantity at different times of the year. In this project, differences in urban impacts on carbon inputs and outputs in streams will be evaluated across cities in the U.S. that have different urban and climate contexts. This research is critical for understanding ecological patterns and processes in urban streams. Broader impacts of the work will include training opportunities for undergraduate and graduate students and postdoctoral scholars, workshops, and an innovative training and internship program for high school students.This study will take a novel approach to jointly consider how the human and ecological dimensions of ecosystem ecology interact to control the quality, quantity, and timing of dissolved organic carbon (DOC) – the largest flux of carbon in streams – entering watersheds across the continent. This project will assess how urbanization affects DOC, focusing on how urbanization affects stream ecosystems in regionally-specific ways. Researchers will test the hypothesis that human activities introduce novel sources of DOC and affect the spatial and temporal scales and variability of ecological processes in different geographies and urban contexts. The hypothesis will be tested using a comparative approach to understand urban effects on DOC in five urban study areas – Miami, FL, Boston, MA, Atlanta, GA, Salt Lake City, UT, and Portland, OR. Extensive synoptic sampling of DOC concentrations and quality will be combined with intensive sensor networks to develop a multi-scale understanding of the quantity and quality of DOC in urban systems. Spatial statistics and time-series analyses will identify key spatio-temporal characteristics of human development (e.g., wastewater infrastructure, housing density) and biophysical factors (e.g., discharge, precipitation, canopy cover) that control the concentration, characteristics, and bioavailability of DOC.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.

大多数生态系统在某种程度上都受到人类活动的影响，但这很容易出现，因此很容易出现。例如，城市对流对流和河流的影响不同，具体取决于年龄，雨水基础设施，绿色空间的数量以及建筑环境的其他因素。气候（温度和降水）和地质等自然因素也会影响不同城市在一年中不同时间影响水质和数量。该项目，将评估城市和气候环境不同的城市中城市对碳投入和流量的影响的差异。这项研究对于理解城市流中的生态模式和过程至关重要。 Broader impacts of the work will include training opportunities for undergraduate and graduate students and postdoctoral scholars, workshops, and an innovative training and internship program for high school students.This Study will take a novel approach to jointly consider how the human and ecological dimensions of ecosystem ecology interact to control the quality, quantity, and timing of dissolved organic carbon (DOC) – the largest flux of carbon in streams – entering在继续的分水岭。该项目将评估城市化如何影响DOC，重点关注城市化如何以特定于区域的方式影响流生态系统。研究人员将检验以下假设：人类活动介绍新颖的DOC来源并影响不同地理和城市环境中生态过程的空间和临时量表以及可变性。该假设将使用比较方法进行检验，以了解五个城市研究领域对DOC的影响 - 迈阿密，佛罗里达州，波士顿，马萨诸塞州，亚特兰大，佐治亚州，盐湖城，犹他州和波特兰等。 DOC浓度和质量的广泛的概要抽样将与密集的传感器网络相结合，以对城市系统中DOC的数量和质量进行多尺度的了解。空间统计和时间序列分析将确定人类发展的关键时空特征（例如，废水基础架构，住房密度）和生物物理因素（例如，出院，降水量，顶篷覆盖）控制着doc的置于nsf的构建范围，并以nsf的构建范围来控制nsf的构建范围，并以此为控制，并控制了nsf的生物利益。优点和更广泛的影响审查标准。