CAREER: Understanding heterogeneity in lake biogeochemistry across time and space

职业：了解湖泊生物地球化学在时间和空间上的异质性

• 批准号: 2048031
• 负责人: Kevin Rose
• 金额: $ 89.97万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-03-15 至 2026-02-28
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2048031&HistoricalAwards=false
• 关键词: CAREER; Understanding; heterogeneity; lake; biogeochemistry

Freshwater aquatic ecosystems, which include lakes, ponds, and reservoirs, provide important services to society, including power generation, recreational opportunities, and the provisioning of clean drinking water. Additionally, freshwater aquatic ecosystems are a major component of the global carbon cycle. Lakes emit a substantial amount of carbon dioxide to the atmosphere, which is derived from a combination of internal organic matter breakdown and external inputs of inorganic carbon from surrounding watersheds. Dissolved oxygen, which is consumed as organisms break down organic matter, is declining in lakes around the world, threatening the ability of these ecosystems to support the current diversity and biomass of organisms they harbor. Past attempts to understand coupled carbon dioxide and dissolved oxygen dynamics in lakes have not accounted for seasonal variation in light intensity and temperature or water column heterogeneity, both of which influence gross fluxes of both gasses. This project seeks to understand how heterogeneity in environmental conditions, in both time and space, impacts carbon and oxygen balance in aquatic ecosystems, and thus improve our understanding of the role lakes play in the global carbon cycle. Together, the integrated research and education plan of this project will provide educational and training opportunities to a wide range of students and early career scientists through improved course materials, a large workshop, and local outreach efforts. This project will also leverage datasets that exist at many organizations and institutions, and the insights gained via the process of compiling and harmonizing diverse data sets will be translatable to many other networks and research efforts. Finally, outreach to citizen-scientists and lake associations around the world will leverage the power of comparative network science to understand individual lake conditions in a global context.Lakes often exhibit substantial and dynamic structural heterogeneity, largely driven by thermal stratification. This project focuses on the production and consumption of carbon dioxide and dissolved oxygen in lakes, and how heterogeneity in time and space regulate the dynamics of these critical biogeochemical fluxes. Lakes are globally important hot-spots of carbon cycling, venting about as much carbon dioxide to the atmosphere as is taken up by the world’s oceans. Theoretically, carbon dioxide and dissolved oxygen are stoichiometrically coupled via metabolic processes, but departures from expectations based on stoichiometry and partial pressure in the atmosphere regularly occur in aquatic ecosystems. Understanding what causes these departures may provide insights into underlying biogeochemical processing in lakes, and may enable more accurate predictions of continental-scale carbon dioxide emissions from lakes. This project aims to combine high-frequency sensor observations, manually collected data, long-term data sets and ecosystem modeling to understand the dynamics of lake carbon dioxide and dissolved oxygen across large environmental gradients. Data will be obtained and harmonized from diverse sources such as the National Ecological Observatory Network (NEON) and collaborating scientists and organizations in the Global Lake Ecological Observatory Network (GLEON).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.

淡水水生生态系统，包括湖泊、池塘和水库，为社会提供重要服务，包括发电、娱乐机会和提供清洁饮用水。此外，淡水水生生态系统是全球碳循环的主要组成部分。向大气排放大量二氧化碳，这些二氧化碳来自内部有机物分解和周围流域溶解氧的外部输入，溶解氧在生物体分解有机物时被消耗。世界各地湖泊的水量下降，威胁到这些生态系统支持其所栖息的生物体当前多样性和生物量的能力。水柱的异质性，两者都会影响两种气体的总通量。该项目旨在了解时间和空间上的环境条件异质性如何影响水生生态系统的碳和氧平衡，从而提高我们对湖泊所发挥作用的理解。在该项目的综合研究和教育计划将通过改进的课程材料、大型研讨会和当地的推广工作，为广大学生和早期职业科学家提供教育和培训机会。利用许多组织和机构中存在的数据集，通过编译和协调不同数据集的过程获得的见解将可转化为许多其他网络和研究工作，最后，将利用与世界各地的公民科学家和湖泊协会的联系。比较网络科学了解各个湖泊的力量湖泊通常表现出巨大的动态结构异质性，这主要是由热分层驱动的。该项目重点关注湖泊中二氧化碳和溶解氧的产生和消耗，以及时间和空间的异质性如何调节这些动态。湖泊是全球重要的碳循环热点，释放到大气中的二氧化碳量与世界海洋吸收的二氧化碳量相当。通过代谢过程以化学计量耦合，但在水生生态系统中经常发生与基于化学计量和大气分压的预期的偏离，了解导致这些偏离的原因可能有助于深入了解湖泊中潜在的生物地球化学过程，并可能使大陆尺度的预测更加准确。该项目旨在结合高频传感器观测、手动收集的数据、长期数据集和生态系统建模，以了解大环境梯度下湖泊二氧化碳和溶解氧的动态。数据将从不同来源获取和协调，例如国家生态观测站网络 (NEON) 以及全球湖泊生态观测站网络 (GLEON) 中的合作科学家和组织。该奖项的法定使命是通过使用基金会的智力价值和更广泛的影响审查标准。

项目成果

LakeEnsemblR: An R package that facilitates ensemble modelling of lakes

LakeEnsemblR：一个促进湖泊集成建模的 R 包

• DOI: 10.1016/j.envsoft.2021.105101
• 发表时间: 2021-09
• 期刊: Environmental Modelling & Software
• 影响因子: 4.9
• 作者: Moore, Tadhg N.;Mesman, Jorrit P.;Ladwig, Robert;Feldbauer, Johannes;Olsson, Freya;Pilla, Rachel M.;Shatwell, Tom;Venkiteswaran, Jason J.;Delany, Austin D.;Dugan, Hilary;et al
• 通讯作者: et al

Integrating Inland and Coastal Water Quality Data for Actionable Knowledge

整合内陆和沿海水质数据以获得可操作的知识

• DOI: 10.3390/rs13152899
• 发表时间: 2021-08
• 期刊: Remote Sensing
• 影响因子: 5
• 作者: El Serafy, Ghada Y.H.;Schaeffer, Blake A.;Neely, Merrie;Spinosa, Anna;Odermatt, Daniel;Weathers, Kathleen C.;Baracchini, Theo;Bouffard, Damien;Carvalho, Laurence;Conmy, Robyn N.;et al
• 通讯作者: et al

Widespread deoxygenation of temperate lakes

温带湖泊普遍脱氧

• DOI: 10.1038/s41586-021-03550-y
• 发表时间: 2021-06
• 期刊: Nature
• 影响因子: 64.8
• 作者: Jane, Stephen F.;Hansen, Gretchen J.;Kraemer, Benjamin M.;Leavitt, Peter R.;Mincer, Joshua L.;North, Rebecca L.;Pilla, Rachel M.;Stetler, Jonathan T.;Williamson, Craig E.;Woolway, R. Iestyn;et al
• 通讯作者: et al

The distribution of depth, volume, and basin shape for lakes in the conterminous United States

美国本土湖泊的深度、体积和盆地形状的分布

• DOI: 10.1002/lno.12475
• 发表时间: 2023-12-18
• 期刊: Limnology and Oceanography
• 影响因子: 4.5
• 作者: Keenan J. Ganz;Max R Glines;Kevin C. Rose
• 通讯作者: Kevin C. Rose

Longer duration of seasonal stratification contributes to widespread increases in lake hypoxia and anoxia

季节性分层持续时间较长导致湖泊缺氧和缺氧普遍增加

• DOI: 10.1111/gcb.16525
• 发表时间: 2022-12
• 期刊: Global Change Biology
• 影响因子: 11.6
• 作者: Jane, Stephen F.;Mincer, Joshua L.;Lau, Maximilian P.;Lewis, Abigail S. L.;Stetler, Jonathan T.;Rose, Kevin C.
• 通讯作者: Rose, Kevin C.