LTER: Coastal Oligotrophic Ecosystem Research

LTER：沿海寡营养生态系统研究

• 批准号: 2025954
• 负责人: John Kominoski
• 金额: $ 475.08万
• 依托单位: Florida International University
• 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: 2021-03-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2025954&HistoricalAwards=false
• 关键词: LTER; Coastal; Oligotrophic; Ecosystem; Research

Coastal ecosystems like the Florida Everglades provide many benefits and services to society including protection from storms, habitat and food for important fisheries, support of tourism and local economies, filtration of fresh water, and burial and storage of carbon that offsets greenhouse gas emissions. The Florida Coastal Everglades Long Term Ecological Research (FCE LTER) program addresses how and why coastal ecosystems and their services are changing. Like many coastal ecosystems, the Florida Everglades has been threatened by diversion of fresh water to support urban and agricultural expansion. At the same time, sea-level rise has caused saltwater intrusion of coastal ecosystems which stresses freshwater species, causes elevation loss, and contaminates municipal water resources. However, restoration of seasonal pulses of fresh water may counteract these threats. Researchers in the FCE LTER are continuing long-term studies and experiments to understand how changes in freshwater supply, sea-level rise, and disturbances like tropical storms interact to influence ecosystems and their services. The science team is guided by a diversity and inclusion plan to attract diverse scientists at all career stages. The team includes resource managers – who use discoveries and knowledge from the FCE LTER to guide effective freshwater restoration – and an active community of academic and agency scientists, teachers and other educators, graduate, undergraduate, and high school students. The project has a robust education and outreach program that engages the research team with the general public to advance science discoveries and protection of coastal ecosystems.The FCE LTER research program addresses how increased pulses of fresh and marine water will influence coastal ecosystem dynamics through: (i) continued long-term assessment of changes in biogeochemistry, primary production, organic matter, and trophic dynamics in ecosystems along freshwater-to-marine gradients with a focus on how these affect accumulation of carbon and related elevation change, (ii) meteorological studies that evaluate how the climate drivers of hydrologic presses and pulses are changing, (iii) social-ecological studies of how governance of freshwater restoration reflects the changing values of ecosystem services, and (iv) use of high-resolution remote sensing, coupled with models to forecast landscape-scale changes. A new experimental manipulation will determine drivers and mechanisms of resilience to saltwater intrusion. Data syntheses integrate month-to-annual and inter-annual data into models of water, nutrients, carbon, and species patterns and interactions throughout the Everglades landscape to compare how ecosystems with different productivities and carbon stores respond (maintain, increase, or decline) to short- (pulses) and long-term changes (presses) in hydrologic connectivity. Synthesis efforts will use data from national and international research networks aimed at understanding how chronic presses and increasing pulses determine ecosystem trajectories, addressing one of the most pressing challenges in contemporary ecology.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.

像佛罗里达大沼泽地这样的沿海生态系统为社会提供了许多好处和服务，包括抵御风暴、为重要渔业提供栖息地和食物、支持旅游业和地方经济、过滤淡水、掩埋和储存碳以抵消温室气体排放。佛罗里达沿海大沼泽地长期生态研究（FCE ltter）项目研究了沿海生态系统及其服务发生变化的方式和原因。像许多沿海生态系统一样，佛罗里达大沼泽地也受到淡水转移的威胁，因为淡水转移是为了支持城市和农业的扩张。与此同时，海平面上升造成了沿海生态系统的盐水入侵，这给淡水物种带来了压力，导致海拔下降，并污染了城市水资源。然而，恢复季节性淡水供应可能会抵消这些威胁。FCE LTER的研究人员正在继续进行长期研究和实验，以了解淡水供应的变化、海平面上升和热带风暴等干扰如何相互作用，影响生态系统及其服务。科学团队以多元化和包容性计划为指导，以吸引不同职业阶段的不同科学家。该团队包括资源管理人员——他们利用FCE LTER的发现和知识来指导有效的淡水恢复——以及一个由学术和机构科学家、教师和其他教育工作者、研究生、本科生和高中生组成的活跃社区。该项目有一个强大的教育和推广计划，使研究团队与公众一起推进科学发现和保护沿海生态系统。FCE LTER研究计划通过以下方式探讨淡水和海水脉冲增加将如何影响沿海生态系统动态：(i)继续长期评估淡水-海洋梯度生态系统中生物地球化学、初级生产、有机质和营养动力学的变化，重点关注这些变化如何影响碳积累和相关的海拔变化；（ii）评估水文压力和脉冲的气候驱动因素如何变化的气象研究；（iii）关于淡水恢复治理如何反映生态系统服务价值变化的社会生态学研究；（iv）利用高分辨率遥感，结合模型预测景观尺度变化。一项新的实验操作将确定对盐水入侵的恢复力的驱动因素和机制。数据综合将月际和年际数据整合到整个沼泽地景观的水、营养物质、碳和物种模式和相互作用模型中，以比较具有不同生产力和碳储量的生态系统如何对水文连通性的短期（脉冲）和长期变化（压力）做出反应（维持、增加或减少）。综合工作将使用来自国家和国际研究网络的数据，旨在了解慢性压力和增加脉冲如何决定生态系统轨迹，解决当代生态学中最紧迫的挑战之一。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Why is calcite a strong phosphorus sink in freshwater? Investigating the adsorption mechanism using batch experiments and surface complexation modeling

为什么方解石在淡水中具有很强的磷沉降作用？

• DOI: 10.1016/j.chemosphere.2021.131596
• 发表时间: 2022
• 期刊: Chemosphere
• 影响因子: 8.8
• 作者: Flower, Hilary;Rains, Mark;Taşcı, Yasemin;Zhang, Jia-Zhong;Trout, Kenneth;Lewis, David;Das, Arundhati;Dalton, Robert
• 通讯作者: Dalton, Robert

Description of Dissolved Organic Matter Transformational Networks at the Molecular Level

• DOI: 10.1021/acs.est.2c04715
• 发表时间: 2023-02-01
• 期刊: ENVIRONMENTAL SCIENCE & TECHNOLOGY
• 影响因子: 11.4
• 作者: Leyva，Dennys;Tariq，Muhammad Usman;Fernandez-Lima，Francisco
• 通讯作者: Fernandez-Lima，Francisco

Temperature Across Vegetation Canopy-Water-Soil Interfaces Is Modulated by Hydroperiod and Extreme Weather in Coastal Wetlands

• DOI: 10.3389/fmars.2022.852901
• 发表时间: 2022-05
• 作者: Xiaochen Zhao;V. Rivera‐Monroy;Chunyan Li;Ivan Vargas-Lopez;R. Rohli;Z. Xue;E. Castañeda‐Moya

Dissolved organic matter in peat and marl marshes varies with nutrient enrichment and restored hydrology

泥炭和泥灰沼泽中溶解的有机物随营养富集和水文恢复而变化

• DOI: 10.1111/rec.13905
• 发表时间: 2023
• 期刊: Restoration Ecology
• 影响因子: 3.2
• 作者: Anderson, Kenneth J.;Kominoski, John S.;Nocentini, Andrea;Hoffman, Sophia
• 通讯作者: Hoffman, Sophia

Year-around survey and manipulation experiments reveal differential sensitivities of soil prokaryotic and fungal communities to saltwater intrusion in Florida Everglades wetlands

全年调查和操作实验揭示了佛罗里达大沼泽地湿地土壤原核和真菌群落对盐水入侵的不同敏感性

• DOI: 10.1016/j.scitotenv.2022.159865
• 发表时间: 2023
• 期刊: Science of The Total Environment
• 影响因子: 9.8
• 作者: Zhao, Jun;Chakrabarti, Seemanti;Chambers, Randolph;Weisenhorn, Pamela;Travieso, Rafael;Stumpf, Sandro;Standen, Emily;Briceno, Henry;Troxler, Tiffany;Gaiser, Evelyn
• 通讯作者: Gaiser, Evelyn