Article
Ecology
Min Sung Kim, Keon Hee Kim, Soon Jin Hwang, Tae Kwon Lee
Summary: The study found that the stability of algal communities in lakes has a significant impact on the occurrence of toxic cyanobacteria. In highly stable lakes, diatoms and green algae groups play a key role in the interaction within the algal community, while in low-stability lakes, the frequency of Microcystis dominates the interaction within the algal community.
Article
Engineering, Marine
Fatemeh Parikhani, Ehsan Atazadeh, Jafar Razeghi, Mohammad Mosaferi, Maxim Kulikovskiy
Summary: This study comprehensively assessed the ecological state of the Aras River using biological indicators of water quality by diatoms. The results showed that the lower reaches of the river were in poor condition and were influenced by anthropological activity.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Biodiversity Conservation
Di Li, Shiliang Liu, Yuan Yang, Li Guo, Bingyang Lyu, Rongjie Yang, Xiaoxia Zhang, Youlin Wang, Fei Yang, Qibing Chen
Summary: The ecological environments of urban rivers are greatly impacted by human activities, resulting in water quality deterioration. This study investigated the urban aquatic environment and water pollution factors in the Funan River in Chengdu, China. Water quality indicators, heavy metal concentrations, and algal communities were measured, and pollution indices and a principal component analysis were performed. The study revealed serious pollution in the river, with moderate eutrophication in summer and an increased risk of harmful algal blooms. Chromium and cadmium were found to affect water quality, likely due to interactions between nutrients and metals influenced by land use, industrial activities, and hydrodynamic conditions. Overall, this study provides important insights for the protection and restoration of urbanized river ecology as societies become more urbanized.
ECOLOGICAL INDICATORS
(2022)
Article
Ecology
Sunim Bae, Dongil Seo
Summary: The study analyzed the factors affecting algal growth due to changes in hydrologic and hydrodynamic conditions caused by weir constructions along the Nakdong River. It found that algal blooms increased in the upper and middle streams post-construction, while decreasing in hypereutrophic downstream areas. The impacts of weirs on algal growth showed both positive and negative effects.
ECOLOGICAL MODELLING
(2021)
Article
Environmental Sciences
L. M. Mosley, S. Priestley, J. Brookes, S. Dittmann, J. Farkas, M. Farrell, A. J. Ferguson, M. Gibbs, M. Hipsey, J. Huang, O. Lam-Gordillo, S. L. Simpson, J. J. Tyler, M. Waycott, D. T. Welsh
Summary: Estuaries in rainfall poor regions like Coorong, Australia, are facing ecological health decline due to reduced freshwater inflows and increased evapo-concentration. The persistently hyper-saline and hypereutrophic conditions in Coorong are affecting water quality and sediment quality, leading to negative impacts on the ecosystem. Increasing lagoonal flushing would help to reduce hypersalinisation and hypereutrophication and improve the health of the ecosystem.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Tim H. M. van Emmerik, Louise J. Schreyers, Yvette A. M. Mellink, Ty Sok, Mauricio E. Arias
Summary: Plastic pollution in rivers is a global concern due to its impact on ocean pollution and long-term plastic retention. Reliable observations are crucial for designing effective strategies to reduce plastic pollution. Various measurement methods have been developed, but harmonization is necessary to ensure consistent data collection. In this study, a harmonization approach was applied to estimate plastic transport in the Mekong-Tonle Sap-Bassac river system. Results showed significant variations in plastic transport between wet and dry seasons, with the city of Phnom Penh playing a major role as an entry point for plastic pollution into the Mekong. Uncertainties in data collection methods need to be addressed for more accurate assessments. This study contributes to the harmonization of river plastic monitoring.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Julieta Peluso, Cristina S. Perez Coll, Dante E. Rojas, Diego Cristos, Carolina M. Aronzon
Summary: This study evaluated the sediment and water quality of five sites in the lower basin of the Paraná River, Buenos Aires, Argentina. It found that site S5, with high organic matter and low dissolved oxygen levels, had the most significant toxic effects on amphibians.
Article
Environmental Sciences
Jung Min Ahn, Jungwook Kim, Lan Joo Park, Jihye Jeon, Jaehun Jong, Joong-Hyuk Min, Taegu Kang
Summary: This study proposed a technique to predict harmful cyanobacteria concentrations using the source codes of the Environmental Fluid Dynamics Code from the National Institute of Environmental Research in South Korea. A graphical user interface was developed to generate information about water quality and algae for predictive modeling. Results showed a high prediction accuracy (62%) for harmful cyanobacteria in the Nakdong River in South Korea.
Article
Environmental Sciences
Riley D. D. Logan, Madison A. A. Torrey, Rafael Feijo-Lima, Benjamin P. P. Colman, H. Maurice Valett, Joseph A. A. Shaw
Summary: Harmful and nuisance algal blooms in the Upper Clark Fork River have increased due to warming water temperatures, high phosphorus levels, and nitrogen influx. This study used a UAV-based hyperspectral imaging system to monitor the river and developed a method for remotely estimating algal standing crops. The method achieved high accuracy in estimating pigment abundance and addresses the limitations of current monitoring techniques.
Article
Environmental Sciences
Isabel Caballero, Gabriel Navarro
Summary: The study evaluated the suitability of Sentinel-2 imagery and the Google Earth Engine platform for monitoring the water quality and harmful algal blooms in Laguna Lake in the Philippines. Results showed that the lake water quality was affected by typhoons during the typhoon season, highlighting the importance of these tools for lake management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Rui Xia, Lei Zou, Yuan Zhang, Yongyong Zhang, Yan Chen, Chengjian Liu, Zhongwen Yang, Shuqin Ma
Summary: River algal blooms have become a complex environmental issue due to human activities and water transfer projects. A developed integrated river algal bloom model considered various processes to simulate and analyze algal blooms, showing the potential impact of the South to North Water Diversion Project on algal bloom occurrence in the Hanjiang River. The model met basic requirements for simulating algal blooms and indicated a significant increase in algal bloom events under different water transfer scenarios. This study provides a scientific tool for optimal water conservancy project planning to protect water ecological environment.
ECOLOGICAL MODELLING
(2022)
Article
Multidisciplinary Sciences
Antonella Pedergnana, Emanuela Cristiani, Natalie Munro, Francesco Valletta, Gonen Sharon
Summary: The study on fishing technology from the Jordan River Dureijat site in Israel reveals significant innovations in fishing technology during the late Epipaleolithic period, indicating a deep understanding of fish behavior and ecology at that time. This advanced fishing technology reflects larger patterns in subsistence evolution and marks the transition to agriculture in the region.
Article
Environmental Sciences
Lingaiah Keerthan, Ramesh RamyaPriya, Lakshmanan Elango
Summary: The study evaluated the water quality of the Cauvery river and adjacent groundwater in the lower basin region. It found that both river water and groundwater were unsuitable for drinking and irrigation purposes, particularly during dry seasons. The water quality was influenced by rock-water interactions and anthropogenic activities, highlighting the importance of monitoring and controlling contaminants.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Joel A. Biederman, Marcos D. Robles, Russell L. Scott, John F. Knowles
Summary: Fires have adverse effects on forested watersheds, but the impact on water resources is uncertain. This study evaluates the effects of two major wildfires in the Lower Colorado River Basin, considering various factors such as elevation, climate, vegetation, burned area, and spatial scale. The results indicate that warm semiarid watersheds respond differently to disturbance compared to colder watersheds, emphasizing the importance of considering the asynchrony between winter snowmelt and summer evaporative demand when assessing long-term impacts on water supply.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Sophia Barinova, Karomat Mamanazarova
Summary: This study conducted a comprehensive assessment of the ecological state of the lower reaches of the Zarafshan River using bioindicators, statistics, and ecological mapping, with findings indicating stability and successful self-purification. Diatoms can serve as good indicators of river water quality in semi-arid regions and reflect climate and anthropogenic load changes.
