Article
Environmental Sciences
Shengjie Li, Zhuo Jiang, Guodong Ji
Summary: The fate of nitrogen is influenced by competition between nitrate reduction pathways, with denitrification removing nitrogen to the atmosphere and DNRA retaining nitrate as ammonia. This study explored the impact of five sulfur forms as electron donors on nitrate fate. The results showed that thiosulfate had the highest nitrate reduction rate, stimulating denitrification and inhibiting DNRA. Elemental sulfur, on the other hand, stimulated both denitrification and DNRA. Metagenomic analysis revealed links between sulfur sources, nitrate reduction pathways, and microbial populations.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Song Li, Robert R. Twilley
Summary: Nitrate enrichment in rivers may alter nitrogen cycling in coastal ecosystems, with direct denitrification being a dominant process in inundated sediments. The importance of denitrification, DNRA, and anammox varied with organic matter concentrations, indicating the complex dynamics of nitrogen processing in coastal deltaic floodplains.
ESTUARIES AND COASTS
(2021)
Article
Environmental Sciences
Song Li, Robert R. Twilley, Denise M. Poveda, Robinson W. Fulweiler
Summary: Hurricanes have a significant impact on wetland hydrodynamics, sedimentation, and vegetation structure in estuarine and coastal wetlands. This study investigated the effects of Hurricane Barry on benthic nitrogen dynamics in the Wax Lake Delta in Louisiana. The results showed that the disturbance of the hurricane was most significant at sites with higher sediment organic matter concentrations, leading to a decrease in denitrification rates and nitrate removal capacity. The disturbed site had not fully recovered three years after the hurricane. Evaluation: 7/10.
ESTUARIES AND COASTS
(2023)
Article
Microbiology
Samantha G. Fortin, Bongkeun Song, Iris C. Anderson
Summary: This study found that denitrification is the primary process for nitrogen removal in the York River Estuary, while DNRA is the main process for nitrogen retention. Denitrification rates are strongly correlated with concentrations of organic matter, nitrate and chlorophyll a, while DNRA rates are best correlated with the relative abundance of specific bacterial families carrying the nrfA gene.
FEMS MICROBIOLOGY ECOLOGY
(2021)
Article
Environmental Sciences
Maria Pia Gervasio, Elisa Soana, Fabio Vincenzi, Giuseppe Castaldelli
Summary: Denitrification in the Po River Delta plays a crucial role in attenuating nitrate pollution, accounting for approximately 30% of the daily nitrogen load.
Article
Ecology
John R. White, Brady Couvillion, John W. Day
Summary: Coastal systems around the globe are being re-integrated with adjacent river systems to restore the natural hydrologic connection to riparian wetlands. This study analyzed the effects of river reconnection on wetland land change and found a net land gain in the receiving areas of the Davis Pond Diversion.
ECOLOGICAL ENGINEERING
(2023)
Article
Limnology
Song Li, Robert R. Twilley, Aixin Hou
Summary: The study revealed that increasing nitrate concentrations shifted the dominance of N-2 fixation to denitrification in benthic nitrogen cycling. While high nitrate levels reduced N-2 fixation rates, they did not completely inhibit N-2 fixation, especially in sites with higher sediment organic matter concentrations.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Kiran Upreti, Victor H. Rivera-Monroy, Kanchan Maiti, Anne Giblin, James P. Geaghan
Summary: This study evaluated denitrification rates in sediment and wetland habitats in coastal Louisiana, finding that high denitrification rates can be sustained in environments with low carbon availability as long as NO3- concentrations are high (>30 μM) and water temperature exceeds 10 degrees Celsius.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Agricultural Engineering
Hao Sheng, Rui Weng, Yan He, Zheng Wei, Yanmei Yang, Jinghan Chen, Minsheng Huang, Gongming Zhou
Summary: This study identified a nitrate-calcium-based pathway that accelerated the start-up of anammox. Calcium nitrate induced partial denitrification to provide nitrite for anammox, while also increasing the contribution of dissimilatory nitrate reduction to ammonium (DNRA). This mutualistic symbiosis among denitrification, DNRA, and anammox in the calcium nitrate-added systems explained the accelerated start-up of anammox.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Paraskevi Mara, Virginia P. Edgcomb, Taylor R. Sehein, David Beaudoin, Chuck Martinsen, Christina Lovely, Bridget Belcher, Rebecca Cox, Meghan Curran, Claire Farnan, Peter Giannini, Sarah Lott, Kyle Paquette, Anna Pinckney, Natalie Schafer, Tonna-Marie Surgeon-Rogers, Daniel R. Rogers
Summary: The study found that oyster aquaculture plays a positive role in the removal of nitrogen from sediments, but different farming methods show variations in gene expression related to nitrogen cycling and nitrogen gas flux. Particularly, nitrogen retention process is significantly enhanced, especially under the bottom cages.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Donald R. Schoolmaster, Camille L. Stagg, Courtney Creamer, Claudia Laurenzano, Eric J. Ward, Mark P. Waldrop, Melissa M. Baustian, Tiong Aw, Sergio Merino, Rachel Villani, Laura Scott
Summary: Coastal wetlands have high potential for carbon sequestration, but excessive flooding can lead to wetland loss and potential soil carbon loss. Research shows that soil carbon losses following wetland submergence occur over long periods of time rather than immediately.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Engineering, Environmental
Aomei Guan, Weixiao Qi, Qiang Peng, Jiemin Zhou, Yaohui Bai, Jiuhui Qu
Summary: The study revealed that the antibiotic sulfamethoxazole has complex effects on nitrogen reduction processes in aquatic ecosystems, altering the activities of denitrification, anammox, and dissimilatory nitrate reduction to ammonium under different environmental conditions, leading to a shift in nitrogen conversion direction.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Manping Zhang, Jung-Chen Huang, Shanshan Sun, Muhammad Muneeb Ur Rehman, Shengbing He, Weili Zhou
Summary: The study found that denitrification is the main mechanism of nitrate reduction in constructed wetlands, with the majority of nitrogen gas produced through this process. The rates of three microbial nitrate reduction processes were significantly higher in the PA wetland than in the NP wetland. Additionally, nitrate plays a crucial role in the competition between DNRA and denitrification, while nitrite regulates anammox.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Soil Science
Joseph C. Morina, Rima B. Franklin
Summary: The salinization of coastal freshwater wetlands can affect the biogeochemical cycling of critical nutrients by altering the soil microbial community structure and function. Nitrate reduction pathways are particularly sensitive to salinization, but the interactive effects of salinization intensity and duration of exposure are still uncertain.
Article
Environmental Sciences
Mingcong Li, Guangshan Wei, Jiai Liu, Xiaoyun Wang, Lijun Hou, Zheng Gao
Summary: This study investigated the effects of nitrate concentration on nitrate reduction rates and microbial communities in wetland sediments from the Yellow River estuary. Results showed that increasing nitrate concentration led to higher denitrification rates, lower anaerobic ammonium oxidation rates, and changes in bacterial community compositions. Nitrate concentration can be divided into high and low groups, impacting microbial relationships within estuarine environments.
ESTUARIES AND COASTS
(2022)
Article
Environmental Sciences
Ivan A. Vargas-Lopez, Victor H. Rivera-Monroy, John W. Day, Julie Whitbeck, Kanchan Maiti, Christopher J. Madden, Armando Trasvina-Castro
Summary: This study utilized continuous in situ chlorophyll-a measurements and satellite data to develop an algorithm for mapping chlorophyll-a distribution, assessing the impact of freshwater diversions and high nutrient loading in the Barataria Basin complex. The continuous in situ chlorophyll-a values were found to be highly correlated with field measurements, demonstrating the utility of this approach for assessing water quality conditions at large spatial scales in dynamic deltaic regions.
Review
Environmental Sciences
John W. Day, William H. Conner, Ronald D. DeLaune, Charles S. Hopkinson, Rachael G. Hunter, Gary P. Shaffer, Demetra Kandalepas, Richard F. Keim, G. Paul Kemp, Robert R. Lane, Victor H. Rivera-Monroy, Charles E. Sasser, John R. White, Ivan A. Vargas-Lopez
Summary: Human activities have significantly altered the hydrology of the economically and ecologically important Barataria Basin in the Mississippi Delta, leading to water quality degradation and wetland loss. Restoration efforts will involve reconnecting waterways with wetlands, implementing sediment diversions, and restoring barrier islands.
Article
Ecology
Edward B. Rastetter, Mark D. Ohman, Katherine J. Elliott, J. S. Rehage, Victor H. Rivera-Monroy, R. E. Boucek, Edward Castaneda-Moya, Tess M. Danielson, Laura Gough, Peter M. Groffman, C. Rhett Jackson, Chelcy Ford Miniat, Gaius R. Shaver
Summary: This paper discusses the importance of time lags in different ecosystems and how long-term studies can effectively address these issues. Case studies demonstrate the impact of time lag effects in various ecosystems and highlight the need for diverse LTER and research network sites to tackle the multiple components of time lag effects in ecosystems.
Article
Limnology
Phaedra Budy, Casey A. Pennock, Anne E. Giblin, Chris Luecke, Daniel L. White, George W. Kling
Summary: The study found that climate change-driven disturbances in lakes can lead to increased nutrient loading, affecting ecosystem function. A fertilization experiment showed varying responses in phytoplankton chlorophyll a, dissolved oxygen, and zooplankton biomass during the fertilization period, with delayed declines in water transparency and fish abundance. This suggests that indirect effects of climate change altering nutrient inputs may impact many lakes in the future.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Forestry
Maria Teresa Rodriguez-Zuniga, Carlos Troche-Souza, Maria Isabel Cruz-Lopez, Victor H. Rivera-Monroy
Summary: Mangroves provide valuable ecosystem services, but their global area is decreasing. Long-term monitoring is crucial to improve the success of restoration and rehabilitation projects. The Mexico's Mangrove Monitoring System provides a successful blueprint for other countries.
Article
Engineering, Marine
Qian Zhang, Chunyan Li, Wei Huang, Jun Lin, Matthew Hiatt, Victor H. Rivera-Monroy
Summary: This study evaluates the spatiotemporal patterns of water circulation induced by six atmospheric cold front events in the Wax Lake Delta region using a 3-D hydrodynamic model. The results show that cold fronts significantly impact channelized and inter-distributary water flow, as well as landward flow and storm surge on the coast. The magnitude and duration of the flushing events vary, and the wind associated with cold fronts is the main driver of water circulation in the region.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Review
Forestry
Victor H. Rivera-Monroy, Xiaochen Zhao, Hongqing Wang, Zuo George Xue
Summary: Modeling tools for mangrove wetlands, important sources of ecosystem services, have been lacking. Spatial and statistical models are most commonly used, while mechanistic models are least used. More model development and application are needed to advance mangrove management and restoration projects.
Article
Microbiology
Khashiff Miranda, Brooke L. Weigel, Emily C. Fogarty, Iva A. Veseli, Anne E. Giblin, A. Murat Eren, Catherine A. Pfister
Summary: Coastal marine macrophytes and their associated microbial communities exhibit diverse metabolic functions that may impact the biology of their hosts and contribute to carbon and nitrogen cycling in nearshore ecosystems.
Article
Ecology
R. James Ansley, Victor H. Rivera-Monroy, Kerry Griffis-Kyle, Bruce Hoagland, Amanda Emert, Todd Fagin, Scott R. Loss, Heather R. McCarthy, Nicholas G. Smith, Elizabeth F. Waring
Summary: Climate change interacts with human modifications to the landscape, altering ecosystem structure and function, biodiversity, and species distributions. Understanding the impacts of climate change on foundation species and ecosystem services is crucial for managing and conserving natural resources. Lack of public understanding and past management practices have exacerbated shifts in invasive species, resulting in significant changes in ecosystem structure and function. Management decisions should be informed by an understanding of ecological trends and the critical nature of climate change impacts.
Article
Biotechnology & Applied Microbiology
Sherlynette Perez Castro, Elena L. Peredo, Olivia U. Mason, Joseph Vineis, Jennifer L. Bowen, Behzad Mortazavi, Anakha Ganesh, S. Emil Ruff, Blair G. Paul, Anne E. Giblin, Zoe G. Cardon
Summary: The study reveals the high diversity of sulfur-cycling microbial communities in salt marsh rhizosphere sediments, with their distribution and genomic features influenced by geographical location and plant species.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Environmental Sciences
Roxanne Marino, Melanie Hayn, Robert W. Howarth, Anne E. Giblin, Karen J. Mcglathery, Peter Berg
Summary: This study is part of a long-term research on the effects of nitrogen loading in a shallow temperate lagoon. The results show that nitrogen fixation rates associated with seagrass epiphytes are relatively high, despite the high nitrogen input from contaminated groundwater. Cyanobacteria play an important role in the epiphyte communities. The study also suggests that climatic variation contributes to inter-annual variation in nitrogen fixation rates.
Article
Chemistry, Analytical
Selena Chavez, Shimon Wdowinski, David Lagomasino, Edward Castaneda-Moya, Temilola Fatoyinbo, Ryan P. P. Moyer, Joseph M. M. Smoak
Summary: In September 2017, Hurricane Irma caused significant damage to the mangrove forests in South Florida, resulting in canopy defoliation, broken branches, and downed trees. Using lidar remote sensing and field data, this study assessed the damage and changes in mangrove forests from Hurricane Irma. The results showed a regional scale loss of aboveground necromass (standing dead trees) of 29% and significant damage in the Shark River area compared to other areas impacted by the hurricane or previous disturbances in the region.
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)