Article
Geography, Physical
Bruce MacVicar, Doug Thompson
Summary: This study analyzes the diversity of pool-riffle morphologies and mobility thresholds, and discusses the influence of flow and sediment regimes on these morphologies.
Article
Biology
Isabel Cantera, Celine Jezequel, Tony Dejean, Jerome Murienne, Regis Vigouroux, Alice Valentini, Sebastien Brosse
Summary: Understanding how anthropization impacts the assembly of species onto communities is crucial for understanding biodiversity changes and disturbances' effects on environmental and biotic processes. This study proposes a framework to measure the assembly processes underlying functional convergence/divergence patterns in fish communities. The study found that anthropogenic disturbances reduced functional divergence and strengthened environmental filtering and weaker competitor exclusion in both stream and river ecosystems.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biodiversity Conservation
Jialing Qiao, Yang Liu, Haixia Fu, Ling Chu, Yunzhi Yan
Summary: This study assessed the effects of urbanization on fish assemblage diversity in the headwater streams of the Xin'an River in China. The results showed that urban segments had higher species richness and lower functional richness compared to natural segments. Fish assemblages also exhibited taxonomic differentiation but functional homogenization in urbanized areas. The study suggests that a combination of taxonomic and functional diversity indices provides a better understanding of how fish biodiversity responds to urbanization.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Karine Smith, Jaclyn M. H. Cockburn, Paul V. Villard
Summary: This study used a 2-dimensional hydrodynamic modeling software, River2D, to simulate the flow velocity and shear stress distributions in a small, shallow river under ice cover and open water conditions. The results showed that increasing discharge affected the velocity magnitude under ice cover, while the spatial distribution remained consistent. The presence of ice cover exacerbated a recirculating eddy, potentially impacting the habitat suitability for silver shiners. Bed shear stress magnitude did not vary significantly between ice and open water, but the spatial distribution differed notably. Model validation demonstrated successful simulation of water depth, velocities, and shear stress within a reasonable margin. Hydrodynamic modeling provides valuable insight into seasonal changes in velocities and shear stress when ice is present.
Article
Environmental Sciences
Sebastian Cedillo, Esteban Sanchez-Cordero, Luis Timbe, Esteban Samaniego, Andres Alvarado
Summary: The study compared different equations for predicting river flow velocity and found that nondimensional hydraulic geometry equations provided the most accurate predictions. A methodology for defining parameters using easily measured field data was proposed, leading to improved predictability. The authors encourage further application of the methodology to enhance understanding of parameters related to reach characteristics.
Article
Geosciences, Multidisciplinary
Jiyi Gu, Huaixiang Liu, Yongjun Lu, Tingjie Huang, Yuning Tan, Mingcheng Zhu
Summary: This study aimed to explore the formation regimes of pool-riffle sequences (PRSs) in gravel-bed rivers without sediment supply. Experimental results showed that the increase in flow and slope promoted PRS development, but also caused the shortening of pools and riffles. The PRS with variable-width greatly increased the influence of sediment supply on bedload transport.
Article
Environmental Sciences
Nan Zhang, Guangxia Shang, Yang Dai, Yuan Zhang, Sen Ding, Xin Gao
Summary: Different biological groups show biased responses to environmental stressors on different scales. Selecting bioindicators based on pressure characteristics is crucial for accurately assessing ecological quality. Macroinvertebrates and fish show distinct responses to environmental stressors, with their indices recommended for biomonitoring programs, especially in plain rivers.
Article
Environmental Sciences
Kun Guo, Naicheng Wu, Wei Li, Annette Baattrup-Pedersen, Tenna Riis
Summary: Stream biofilms are complex aggregates of diverse organism groups that are essential for global carbon and nitrogen cycles. The study found that specific phyla dominated the prokaryotic and eukaryotic communities at most sites, with diversity peaking in July and January. Hydrological and physicochemical variables were significant factors in explaining community composition, but a large portion of variation remained unexplained, likely due to unmeasured factors such as light intensity and biological interactions. A multitrophic level perspective is suggested for future biofilm studies to capture the complexity of trophic and non-trophic interactions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Yunlong Lei, Marwan A. Hassan, Enrica Viparelli, Shawn M. Chartrand, Chenge An, Xudong Fu, Chunhong Hu
Summary: Downstream width variations play a crucial role in the development and maintenance of pool-riffle morphology, while the impact of sediment supply rate and caliber on this morphology has not been well understood. In this study, a river morphodynamics model is proposed and validated with experimental data. The results show that pool-riffle morphology is resilient to various sediment supply changes, highlighting the importance of downstream width variations.
WATER RESOURCES RESEARCH
(2023)
Review
Ecology
Rosetta C. Blackman, Florian Altermatt, Arnaud Foulquier, Tristan Lefebure, Mailys Gauthier, Agnes Bouchez, Rachel Stubbington, Alexander M. Weigand, Florian Leese, Thibault Datry
Summary: Intermittent rivers and ephemeral streams are waterways that periodically cease flow or dry completely, found worldwide. These dynamic ecosystems play a crucial role in the evolutionary triggers for aquatic and terrestrial biota, with potential consequences for ecosystem services. Novel genomic tools based on high-throughput sequencing have the potential to address unanswered questions and bridge ecological-evolutionary dynamics in these ecosystems.
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
(2021)
Review
Environmental Sciences
Fionn R. Bernthal, John D. Armstrong, Keith H. Nislow, Neil B. Metcalfe
Summary: This article discusses the impact of increasing nutrient limitation on temperate basin stream and river systems, particularly in upland areas that support or used to support wild Atlantic salmon populations. Changes in land use and barriers in rivers have altered nutrient dynamics, affecting salmon and other migratory fish species. Declining salmon populations can lead to reduced nutrient sources, decreasing ecosystem and fisheries productivity. Experimental studies have shown that appropriate nutrient additions can increase the growth and biomass of juvenile salmon, offering potential conservation benefits. Further research is needed to understand the long-term effects of nutrient additions on salmon populations and stream ecosystems, as well as the vulnerability of downstream habitats to eutrophication.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
Review
Environmental Sciences
Robert M. Hughes, Robert L. Vadas
Summary: Croplands and rangelands have altered lands and waters for millennia globally, with 30% of USA streams and rivers showing poor macroinvertebrate condition and 26% showing poor fish condition. Excess nutrients, salinity, sedimentation, and impaired riparian vegetation are the main causes. Despite efforts under the Clean Water Act and Federal Land Policy, controlling agricultural pollution and livestock grazing is essential for restoring and maintaining water quality and natural conditions. Promising results have been seen from basin and watershed planning as well as riparian zone protections.
Article
Computer Science, Information Systems
Zohair Raza Hassan, Sarwan Ali, Imdadullah Khan, Mudassir Shabbir, Waseem Abbas
Summary: Feature extraction is crucial for graph analytics as it provides graph descriptors used in downstream analysis models. Existing algorithms for computing these descriptors cannot handle large graphs due to memory constraints and lack of user control over runtime. This article presents streaming algorithms that approximates three graph descriptors and eliminates the need to store the entire graph in memory. The proposed descriptors demonstrate high accuracy and can be computed within minutes even for graphs with millions of edges, using only 25% of the memory.
ACM TRANSACTIONS ON KNOWLEDGE DISCOVERY FROM DATA
(2023)
Article
Biodiversity Conservation
Mario Brauns, Daniel C. Allen, Iola G. Boechat, Wyatt F. Cross, Veronica Ferreira, Daniel Graeber, Christopher J. Patrick, Marc Peipoch, Daniel Schiller, Bjoern Guecker
Summary: Human impacts, such as nutrient pollution and land-use change, have led to declines in the quality and quantity of freshwater resources. This study analyzes the effects of human stressors on stream ecosystem functions and finds that most stressors inhibit ecosystem functioning. Nitrate uptake efficiency is particularly affected, with agriculture having the largest inhibitory effect. However, there are both negative and positive effects within each stressor-function pair. Wastewater effluents, agriculture, and urban land use have the strongest overall effects. These findings highlight the importance of understanding the multifunctionality of streams and rivers and the need for ecological function-based freshwater management strategies.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Computer Science, Artificial Intelligence
Conor Fahy, Shengxiang Yang, Mario Gongora
Summary: This paper proposes an algorithm named COCEL for classification in dynamic data streams. The algorithm combines a stream clustering algorithm and an ensemble of one-class classifiers to recognize and react to changes in the data stream. Experimental results demonstrate that COCEL can achieve superior or comparative accuracy with less labeled data compared to peer stream classification ensembles.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Leslie O. Rieck, S. Mazeika P. Sullivan
Article
Environmental Sciences
Charles W. Goss, S. Mazeika P. Sullivan, P. Charles Goebel
RIVER RESEARCH AND APPLICATIONS
(2020)
Editorial Material
Multidisciplinary Sciences
S. Mazeika Patricio Sullivan, Mark C. Rains, Amanda D. Rodewald, William W. Buzbee, Amy D. Rosemond
Article
Biodiversity Conservation
Kristen M. Diesburg, S. Mazeika P. Sullivan, David W. P. Manning
Summary: The study found that the ecological consequences of the hemlock woolly adelgid invader were clearest at lower trophic levels, with more nuanced impacts on riparian spiders.
BIOLOGICAL INVASIONS
(2021)
Article
Ecology
S. Mazeika P. Sullivan, Joseph W. Corra, Jeffry T. Hayes
Summary: Urbanization and changes in water quality have significant impacts on the reproductive success and body condition of Tree Swallows. Despite the poor environmental quality in cities, Tree Swallows exhibit greater reproductive success in urban areas due to more favorable climate conditions, emphasizing the importance of considering urbanization, local climate, and water quality in the conservation of aerial insectivorous bird species.
ECOLOGICAL MONOGRAPHS
(2021)
Article
Environmental Sciences
S. Mazeika Patricio Sullivan, Jason R. Bohenek, Carlos Caceres, Laura W. Pomeroy
Summary: Integrating a network perspective into research on multiple stressors in rivers can reveal indirect stressor effects and estimate both taxonomic and functional community characteristics. Urban stressors such as impervious surfaces and sedimentation can decrease network complexity, compartmentalization, and stability, with larger streams buffering the negative effects of these stressors.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
David W. P. Manning, S. Mazeika P. Sullivan
Summary: The study found a negative correlation between emergent insects and pollution tolerance, indicating a significant loss of nutritional subsidy in terrestrial environments from impaired aquatic ecosystems. While some bird populations were affected by shortages of emergent aquatic insects, responses varied among species, suggesting that unique habitat and foraging behaviors likely complicated these relationships. Strengthening the spatial and temporal concordance between emergent-insect and bird-survey data is crucial for interpreting species-level responses over time.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
Anca Baesu, Gregory Ballash, Dixie Mollenkopf, Thomas Wittum, S. Mazeika Patricio Sullivan, Stephane Bayen
Summary: This study utilized a QuEChERS extraction method to identify pharmaceuticals and their metabolites in fish livers. Both target and suspect screening workflows were used, revealing antibiotics and antidepressant metabolites in fish livers, demonstrating the effectiveness of suspect screening in detecting new contaminants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Angelica M. Torres-Bejarano, S. Mazeika Patricio Sullivan, William Gonzalez-Daza, Carlos Caceres, Gabriel J. Z. Colorado
Summary: The study highlights the importance of riparian vegetation structure and seasonal changes on fish assemblage diversity in Amazonian streams. There were no significant differences in species richness and evenness in different levels of riparian vegetation coverage, but seasonal changes did impact fish assemblage composition. Factors such as diet composition and functional diversity also varied with riparian vegetation condition and seasonality.
Article
Fisheries
Andrew K. Carlson, William W. Taylor, Dennis R. DeVries, C. Paola Ferreri, Michael J. Fogarty, Kyle J. Hartman, Dana M. Infante, Michael T. Kinnison, Simon A. Levin, Richard T. Melstrom, Raymond M. Newman, Malin L. Pinsky, Daniel Rubenstein, S. Mazeika P. Sullivan, Paul A. Venturelli, Michael J. Weber, Melissa R. Wuellner, Gayle B. Zydlewski
Summary: "The Ten Steps to Responsible Inland Fisheries" are global recommendations aiming to address the subordinate position of inland fisheries. Survey results showed that Science, Communication, and Assessment are rated as highly important, well funded, and achievable steps, while Aquaculture and a global Action Plan are not favored. Nutrition was identified as the most inadequately supported yet achievable step.
Article
Ecology
Leslie O. Rieck, S. Mazeika Patricio Sullivan
Summary: Urbanization in stream catchments affects stream channel hydrogeomorphic features, aquatic insect assemblages, and riparian spiders. This study found strong associations between hydrogeomorphic characteristics, emergent aquatic insects, and the trophic dynamics of riparian spiders. These results highlight the importance of monitoring and restoring fluvial geomorphic form and function in urban catchments to benefit both aquatic and terrestrial ecosystems.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Multidisciplinary Sciences
Gregory A. Ballash, Anca Baesu, Seungjun Lee, Molly C. Mills, Dixie F. Mollenkopf, S. Mazeika P. Sullivan, Jiyoung Lee, Stephen Bayen, Thomas E. Wittum
Summary: This study found that surface waters, especially those receiving wastewater flows, can disseminate antimicrobial resistant bacteria, antimicrobial resistance genes, and antibiotics. The study also discovered that fishes can be effective bioindicators of these contaminants and highlighted the varying importance of different mechanisms in the establishment of antimicrobial resistant bacteria in aquatic ecosystems.
Article
Ecology
Song S. Qian, Kristi K. Arend, Stephen J. Jacquemin, S. Mazeika Patricio Sullivan, Kurt P. Kowalski
Summary: This study introduces a Bayesian hierarchical modeling approach to estimate wetland-specific long-term phosphorus retention capacity by pooling data from multiple flow-through wetlands. The approach reduces estimation uncertainty and facilitates information sharing across sites, avoiding pitfalls induced by large data. Sequential updating framework is developed to alleviate the computational burden, and the model is applied to estimate the retention capacity of wetlands in Ohio, USA. This work serves as an important step in developing tools for wetland restoration initiatives and a publicly accessible on-line open computation platform is developed to aid natural resource specialists in future wetland planning.
ECOLOGICAL ENGINEERING
(2023)
Article
Entomology
Sabrina M. Daufel, Jason R. Bohenek, S. Mazeika Patricio Sullivan
Summary: Artificial light at night is a global problem that disrupts the physiology and behavior of organisms, including insects. This study investigated the effects of artificial light on mosquito oviposition behavior and found species-specific responses.
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
(2023)
Article
Biodiversity Conservation
Joseph Corra, S. Mazeika P. Sullivan
Summary: The study found that climate change, urbanization, and alterations in food resources have significant impacts on the blood indices and stress levels of tree swallow nestlings, providing insights into the assessment of nestling health and survival rates.
CONSERVATION PHYSIOLOGY
(2021)