Article
Environmental Sciences
Joel W. Harrison, Mark A. Lucius, Jeremy L. Farrell, Lawrence W. Eichler, Rick A. Relyea
Summary: Utilizing high-frequency sensor data and machine learning techniques to estimate stream nitrogen and phosphorus concentrations showed promising results in the study. However, challenges such as skewed distributions, nonlinear relationships, and multicollinearity still exist in addressing nutrient concentration variations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Eunju Jeong, Young -In Kim, Jin-Yong Lee, Maimoona Raza
Summary: Microplastics (MPs) are emerging contaminants in agricultural regions due to the use of plastics in farming activities. This study investigated the distribution of MPs in groundwater and cave water of an agricultural region in Korea. The results showed that MPs contamination can penetrate deep aquifers, with lower abundance during wet season and smaller size ranges.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Youness Ouassanouan, Younes Fakir, Vincent Simonneaux, Mohamed Hakim Kharrou, Houssne Bouimouass, Insaf Najar, Mounia Benrhanem, Fathallah Sguir, Abdelghani Chehbouni
Summary: Mediterranean piedmonts play a crucial role in hydro-agricultural systems, connecting mountains and plains. However, the impacts of climate variability and recurrent droughts on hydrology and agriculture in the Mediterranean basin are not well understood. This study assesses the effects of climate variability and agricultural changes on water resources in a traditional irrigated piedmont in Morocco's High Atlas Mountains. The findings show that droughts have led to decreased water resources, while agricultural practices have transitioned from seasonal crops to perennial crops.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Physics, Fluids & Plasmas
Gabriella Dantas Franco, Flavia Maria Darcie Marquitti, Lucas D. Fernandes, Dan Braha, Marcus Aloizio Martinez de Aguiar
Summary: Mutation and drift have opposite roles in genetics, with mutation creating diversity and drift causing gene variants to disappear. In the absence of natural selection and migration, the balance between drift and mutation in a well-mixed population determines its diversity.
Article
Environmental Sciences
Maria Victoria Marinelli, Donatella Valente, Carlos Marcelo Scavuzzo, Irene Petrosillo
Summary: Human decisions, policies, and management strategies have a significant impact on landscape patterns in metropolitan areas, particularly through land-use/land-cover changes and landscape service flow. The research analyzes LULC dynamics, the effect of change on landscape composition and configuration, and the flow of landscape services to identify hot-spots of service provision. Valuing where landscape service hot-spots are located helps managers identify suitable policies to preserve them and enhance landscape integrity, functionality, and resilience.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Geography
Janardan Mainali, Heejun Chang, Rabindra Parajuli
Summary: We developed a novel spatial stream network geographically weighted regression (SSN-GWR) model by incorporating stream-distance metrics into GWR. The model was tested for predicting seasonal total nitrogen (TN) and total suspended solids (TSS) concentrations in relation to watershed characteristics. Compared to the standard GWR model, the SSN-GWR model generally provided better model fit, reduced residual spatial autocorrelation, and lessened overall modeling errors. The results demonstrate the importance of integrating stream distance into GWR for improving model fit and understanding hydrological processes related to water quality in a complex river basin. The local variations in model fit derived from this work can be used to devise fine-scale interventions for water quality improvements.
ANNALS OF THE AMERICAN ASSOCIATION OF GEOGRAPHERS
(2023)
Article
Green & Sustainable Science & Technology
Sohail Abbas, Shazia Kousar
Summary: The study analyzed drought severity and magnitude in the Upper Indus Basin from 1991-2017 using standardized precipitation index and streamflow drought index. Results showed greater impact of droughts in the northeastern side compared to the southwestern side, with strong correlation to El Nino and La Nina in 1997-1998 leading to severe drought from 1998-2002. The findings can assist policymakers in Pakistan in implementing new drought risk reduction measures.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2021)
Article
Environmental Sciences
Alberto Maceda-Veiga, Sergio Albacete, Nuria Flor-Arnau, Cristiana Vieira, Vicenc Bros, Marc Domenech, Josep M. Bayona, Juli Pujade-Villar, Francesc Sabater, Ralph Mac Nally
Summary: The study highlights the impacts of traditional farming practices on exposed riverbanks and water quality, mainly attributed to traditional meadow management, abandoned mill weirs, and occasional timber harvesting. While certain indicators differed between exposed and reference sites, the majority of riparian taxa benefited from larger forested areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Water Resources
Scott C. Brooks, Carrie L. Miller, Ami L. Riscassi, Kenneth A. Lowe, Johnbull O. Dickson, Grace E. Schwartz
Summary: The study revealed that Hg and MMHg concentrations and flux decreased in the upper reaches of EFPC near the point of water addition, while most water quality parameters remained unchanged after flow management stopped. Changes in dissolved organic matter (DOM) composition may have implications for the formation and bioavailability of MMHg.
HYDROLOGICAL PROCESSES
(2021)
Article
Engineering, Environmental
Shijie You, Ye Sun, Xiuheng Wang, Nanqi Ren, Yanbiao Liu
Summary: To improve the prediction accuracy and interpretability of the life-cycle environmental impacts of chemicals, we utilized the mutual information-permutation importance (MI-PI) feature selection method for data processing and applied a weighted Euclidean distance method for data mining. Based on these data processing techniques, artificial neural network (ANN) models were developed to predict the environmental impacts of chemicals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Connor J. Taylor, Megan Booth, Jamie A. Manson, Mark J. Willis, Graeme Clemens, Brian A. Taylor, Thomas W. Chamberlain, Richard A. Bourne
Summary: A novel kinetic modelling methodology was developed to identify the correct reaction model and kinetic parameters by an autonomous framework combined with transient flow measurements; an automated flow chemistry platform conducted linear flow-ramp experiments to map reaction profiles rapidly; computational approach discriminated between possible reaction models and identified correct kinetic parameters for each process.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Shuhan Lei, Ju Zhang, Bo Hu, Junkai Zhao, Wenjuan Yang, Bingfeng Shi, Ying Chen, Jianqiang Zhao
Summary: A side-stream tank was used to improve the performance of the Anaerobic-Anoxic-Oxic process. The injection of partial mixtures from the anaerobic tank into the side-stream tank with nitrite nitrogen concentrations increased total nitrogen and total phosphorus removal efficiencies. Nitric oxide (NO) was observed in the side-stream tank. The abundances of certain bacteria species varied and NO played a crucial role in improving nutrient removal in the side-stream nitrite-enhanced strategy.
BIORESOURCE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Katelyn M. Baumer, Juan J. Lopez, Surabi Naidu, Sanjana Rajendran, Miguel A. Iglesias, Kathleen M. Carleton, Cheyanne J. Eisenmann, Lillian R. Carter, Bryan F. Shaw
Summary: The research highlights the underestimated role of the mouth in tactile learning. By creating small, affordable, and portable 3D models, students can recognize structures through oral touch with accuracy similar to visual recognition.
Article
Engineering, Aerospace
Arnau Pont-Vilchez, Alexey Duben, Andrey Gorobets, Alistair Revell, Assensi Oliva, F. Xavier Trias
Summary: This paper introduces a new method to address the gray area issue in the transition from RANS to LES by reducing numerical diffusion in critical areas for more accurate turbulence development. Through testing different formulations and implementing the proposed changes in two different codes, encouraging results were observed, indicating the suitability of the new approach as a candidate for solving the gray area problem in such flows.
Article
Operations Research & Management Science
Simon Emde, Shohre Zehtabian, Yann Disser
Summary: This article addresses the problem of scheduling direct deliveries between a depot and multiple customers using a heterogeneous truck fleet, with consideration of time windows and weights constraints, milk runs, and maximization of the weighted flow time. The authors adapt a mixed-integer programming model and prove the NP-completeness of feasibility decision-making at different levels. They also compare the performance of constraint programming solver, logic-based Benders decomposition, and commercial optimization software, and explore the robustness of the objective function and the impact of milk runs.
ANNALS OF OPERATIONS RESEARCH
(2023)
Article
Environmental Sciences
K. J. Rattan, M. J. Bowes, A. G. Yates, J. M. Culp, P. A. Chambers
Summary: This study examined the variation in phosphorus inputs in streams in the Red River Valley through analyzing phosphorus concentration-flow relationships. The results showed that for most sub-watersheds, diffuse sources contributed the most, but significant point-source inputs were also found in some sub-watersheds, especially during summer.
JOURNAL OF GREAT LAKES RESEARCH
(2021)
Article
Environmental Sciences
Sophie N. Cormier, Jordan L. Musetta-Lambert, Kristin J. Painter, Adam G. Yates, Robert B. Brua, Joseph M. Culp
Summary: The study found that wastewater treatment facilities are a major source of nitrogen in rural stream food webs, with a greater contribution in summer compared to spring. The impact of wastewater on nitrogen persists from summer releases into the following spring, indicating a high degree of persistence.
JOURNAL OF GREAT LAKES RESEARCH
(2021)
Article
Environmental Sciences
Kristin J. Painter, Robert B. Brua, Geoff Koehler, John Spoelstra, Adam G. Yates
Summary: The study found that intensive agriculture and growing human populations contribute to nitrogen sources in streams, with seasonal variations in nitrogen delivery. Nitrogen sources from fertilizers and animal waste were more prominent during spring and summer, while human and livestock waste were the dominant contributors to algae. The study also highlighted the importance of managing nitrogen sources to control downstream nitrogen transfer and protect stream function.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Natalie M. Izral, Robert B. Brua, Joseph M. Culp, Adam G. Yates
Summary: The gill tissue metabolome of northern crayfish was most effective in detecting and differentiating between impacts of human activities, particularly municipal wastewater. The tail metabolome was best at differentiating between crayfish collected at reference and impacted sites. Hepatopancreas tissue metabolites showed limited and inconsistent detection capabilities among sites. The metabolome of northern crayfish can be an effective biomonitoring tool, with tissue selection based on monitoring purposes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Maria Joao Feio, Robert M. Hughes, Marcos Callisto, Susan J. Nichols, Oghenekaro N. Odume, Bernardo R. Quintella, Mathias Kuemmerlen, Francisca C. Aguiar, Salome F. P. Almeida, Perla Alonso-EguiaLis, Francis O. Arimoro, Fiona J. Dyer, Jon S. Harding, Sukhwan Jang, Philip R. Kaufmann, Samhee Lee, Jianhua Li, Diego R. Macedo, Ana Mendes, Norman Mercado-Silva, Wendy Monk, Keigo Nakamura, George G. Ndiritu, Ralph Ogden, Michael Peat, Trefor B. Reynoldson, Blanca Rios-Touma, Pedro Segurado, Adam G. Yates
Summary: The biological assessment and rehabilitation of rivers worldwide still face major gaps, with limited funding and technology being the main constraints for quality assessment and ecological restoration efforts. While countries in Asia, Europe, Australia, and the Americas have relatively standardized biological assessment practices, regions like South America, Africa, and Mexico need to strengthen their biological monitoring efforts.
Article
Biodiversity Conservation
Nolan J. T. Pearce, Isabelle Lavoie, Kathryn E. Thomas, Patricia A. Chambers, Adam G. Yates
Summary: This study investigated how stream communities respond to cumulative human impacts such as nutrient enrichment, showing that the effects of nutrient enrichment are conditional on upstream ecosystem conditions. Future assessments may need to consider the complexities related to environmental stressors when evaluating the impacts of human activities on stream ecosystems.
ECOLOGICAL INDICATORS
(2021)
Article
Biochemistry & Molecular Biology
Sarah M. Pomfret, Robert B. Brua, Danielle Milani, Adam G. Yates
Summary: The oil sands region in Alberta, Canada contains vast oil reserves, but processing generates toxic byproducts like naphthenic acids in oil sands process waters. Exposure to sublethal levels of naphthenic acids can impact metabolism and physiology of aquatic organisms. This research suggests that even low concentrations of naphthenic acids in oil sands process waters may have chronic effects on aquatic life.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2021)
Article
Environmental Sciences
David M. Costello, Scott D. Tiegs, Luz Boyero, Cristina Canhoto, Krista A. Capps, Michael Danger, Paul C. Frost, Mark O. Gessner, Natalie A. Griffiths, Halvor M. Halvorson, Kevin A. Kuehn, Amy M. Marcarelli, Todd Royer, Devan M. Mathie, Ricardo J. Albarino, Clay P. Arango, Jukka Aroviita, Colden Baxter, Brent J. Bellinger, Andreas Bruder, Francis J. Burdon, Marcos Callisto, Antonio Camacho, Fanny Colas, Julien Cornut, Veronica Crespo-Perez, Wyatt F. Cross, Alison M. Derry, Michael M. Douglas, Arturo Elosegi, Elvira Eyto, Veronica Ferreira, Carmen Ferriol, Tadeusz Fleituch, Jennifer J. Follstad Shah, Andre Frainer, Erica A. Garcia, Liliana Garcia, Pavel E. Garcia, Darren P. Giling, R. Karina Gonzales-Pomar, Manuel A. S. Graca, Hans-Peter Grossart, Francois Guerold, Luiz U. Hepp, Scott N. Higgins, Takuo Hishi, Carlos Iniguez-Armijos, Tomoya Iwata, Andrea E. Kirkwood, Aaron A. Koning, Sarian Kosten, Hjalmar Laudon, Peter R. Leavitt, Aurea L. Lemes da Silva, Shawn J. Leroux, Carri J. LeRoy, Peter J. Lisi, Frank O. Masese, Peter B. McIntyre, Brendan G. McKie, Adriana O. Medeiros, Marko Milisa, Yo Miyake, Robert J. Mooney, Timo Muotka, Jorge Nimptsch, Riku Paavola, Isabel Pardo, Ivan Y. Parnikoza, Christopher J. Patrick, Edwin T. H. M. Peeters, Jesus Pozo, Brian Reid, John S. Richardson, Jose Rincon, Geta Risnoveanu, Christopher T. Robinson, Anna C. Santamans, Gelas M. Simiyu, Agnija Skuja, Jerzy Smykla, Ryan A. Sponseller, Franco Teixeira-de Mello, Sirje Vilbaste, Veronica D. Villanueva, Jackson R. Webster, Stefan Woelfl, Marguerite A. Xenopoulos, Adam G. Yates, Catherine M. Yule, Yixin Zhang, Jacob A. Zwart
Summary: Microbes play a critical role in plant litter decomposition and the fate of carbon in rivers and riparian zones. The process of nutrient immobilization, whereby microbes acquire nitrogen and phosphorus from the environment during the decomposition of low-nutrient plant litter, is influenced by nutrient loading and changing climate. However, environmental controls on immobilization are poorly understood due to the complex interplay between environmental factors and plant litter chemistry.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Biodiversity Conservation
Maria Joao Feio, Robert M. Hughes, Sonia R. Q. Serra, Susan J. Nichols, Ben J. Kefford, Mark Lintermans, Wayne Robinson, Oghenekaro N. Odume, Marcos Callisto, Diego R. Macedo, Jon S. Harding, Adam G. Yates, Wendy Monk, Keigo Nakamura, Terutaka Mori, Masanao Sueyoshi, Norman Mercado-Silva, Kai Chen, Min Jeong Baek, Yeon Jae Bae, Ram Devi Tachamo-Shah, Deep Narayan Shah, Ian Campbell, Nabor Moya, Francis O. Arimoro, Unique N. Keke, Renato T. Martins, Carlos B. M. Alves, Paulo S. Pompeu, Subodh Sharma
Summary: This study evaluated the biological condition of rivers globally and provided recommendations for river ecosystem conservation. The results showed that good biological conditions were associated with good water quality and increased forested areas, while severely impaired conditions were associated with higher human development index scores, poorer water quality, and fewer protected freshwater areas. The study highlights the importance of implementing statutory bioassessment programs in Asian, African, and South American countries.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Ecology
Rebecca Poisson, Adam G. Yates
Summary: Agricultural development and subsurface drainage systems can significantly influence stream environmental conditions, such as temperature and water chemistry, which in turn affect ecological function. This study assessed the impact of an agricultural drainage system on cellulose decomposition and benthic respiration in a headwater stream. The results showed that drainage inputs reduced cellulose decomposition, especially in summer, due to stream cooling. The findings suggest that there may be a widespread reduction in cellulose decomposition in streams with subsurface drainage, but increased resiliency to climate warming may occur in streams receiving significant inputs from such systems.
ECOLOGICAL PROCESSES
(2022)
Article
Engineering, Civil
Meghan A. Vissers, James W. Roy, Adam G. Yates, Kyle Robinson, Sabina Rakhimbekova, Clare E. Robinson
Summary: Streambed sediment and groundwater are important sources of soluble reactive phosphorus (SRP) in freshwater catchments. This study evaluates the variability and controls on porewater SRP in an agricultural streambed, finding high SRP concentrations in low groundwater discharge zones and a link to iron and manganese redox cycling. Temporal variability in porewater SRP was observed, but no distinct seasonal changes were observed along the stream reach.
JOURNAL OF HYDROLOGY
(2023)
Article
Water Resources
Adam G. Yates, Robert B. Brua, Arthur Friesen, Sharon Reedyk, Glenn Benoy
Summary: The study observed increasing concentrations, loads, and yields of TN, TP, and TSS at most river stations in the eastern half of the Lake Winnipeg Basin, while decreasing or stationary trends were seen in the western stations. Nutrient and suspended solid trends were closely related to discharge patterns, especially in the Red-Assiniboine subdrainage.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Ecology
L. K. Banks, I. Lavoie, M. P. Boreux, S. L. Kroeze, N. Gotkowski, C. E. Robinson, J. W. Roy, A. G. Yates
Summary: This study assessed the association between groundwater and stream biofilm communities and processes in a headwater stream network in southern Ontario, Canada. The results showed that seasonal variation played a significant role in driving diatom assemblage composition and cellulose decomposition. However, there was no association between groundwater input and stream biofilm condition, suggesting surface water influences may have overwhelmed the groundwater signal at the reach scale.
Article
Marine & Freshwater Biology
L. K. Banks, I. Lavoie, C. E. Robinson, J. W. Roy, A. G. Yates
Summary: This study assessed the stream biofilm communities and cellulose decomposition in run and riffle habitats across three stream reaches with different groundwater inputs in Kintore Creek, Canada. The results showed that algal biomass and diatom assemblage composition differed between runs and riffles in reaches with moderate and high groundwater inputs, but not in the low groundwater reach. Additionally, streambed cellulose decomposition was faster in riffles than in runs in reaches with moderate and high groundwater input.