Article
Environmental Sciences
Nicky M. Faucheux, Andrew R. Sample, Caleb A. Aldridge, David M. Norris, Conner Owens, Victoria R. Starnes, Spencer VanderBloemen, Leandro E. Miranda
Summary: Considering reservoirs as linear fragments in a basin's river network could improve understanding, predictability, and management efficiency. Through analyzing the attributes of large reservoirs in the United States, this study found various cascading spatial patterns, which may have different implications for management activities and vary along river basins.
WATER RESOURCES RESEARCH
(2022)
Article
Environmental Sciences
Sai Wang, Bang-Ke Luo, Ying-Jun Qin, Jian-Gang Zhao, Tuan-Tuan Wang, Simon D. Stewart, Yang Yang, Zhong-Bing Chen, Hong-Xin Qiu
Summary: Stable isotopes are increasingly used to understand the impacts of environmental changes on riverine ecological properties. The study found that the isotopic niches of fish in rivers are influenced by environmental gradients and human disturbance, with the spatial variation determined by external factors like epilithic periphyton and suspended particulate organic matter.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Spectroscopy
Nehir Kaymak, Nesrin Emre, F. Banu Yalim, Cihan Toslak, Yilmaz Emre, Senol Akin
Summary: In this study, the trophic structure and interspecies trophic interactions of non-native fish species in Karacaorer I reservoir were evaluated using stable C and N isotopes. The results showed that non-native fish have larger niche widths and higher competitive abilities compared to native fish, which may contribute to their successful invasion and coexistence.
SPECTROSCOPY LETTERS
(2023)
Article
Ecology
Anne Lize, Nils Teichert, Jean-Marc Roussel, Anthony Acou, Eric Feunteun, Alexandre Carpentier
Summary: This study examines the ecological niche of six diadromous fish species obstructed by two river dams and reveals their habitat preferences and carbon sources using stable isotope analysis. The results indicate that different fish species utilize different resources in different habitats, and some species have larger niche overlaps.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Ecology
Jordan C. Besson, Joshua J. Neary, Joshua D. Stafford, Corey G. Dunn, Leandro E. Miranda
Summary: The transformations caused by reservoir cascades can impact fish assemblages at the reach scale, but its basin-scale effects are unclear. By studying longitudinal trends in fish functional traits in the Tennessee River reservoir cascade, it was found that the predictions made by the River Continuum Concept were generally sustained.
FRESHWATER BIOLOGY
(2023)
Article
Environmental Sciences
Jenni Velichka, Karen A. Kidd, Kelly Munkittrick, Meera Shanmuganathan, Philip Britz-McKibbin, R. Allen Curry
Summary: Damming of a river can alter the accumulation of sediment-bound elements, food web dynamics, and the chemical composition of fish. This study found that the dam altered the uptake of contaminants and nutrients by fish, indicating the importance of location and species when considering the risks and benefits of consuming wild fish from an impacted system.
ENVIRONMENTAL POLLUTION
(2023)
Article
Fisheries
S. C. Hedden, K. B. Gido, C. K. Hedden, C. A. Pennock, B. R. Duran, B. A. Hines, E. I. Gilbert, M. C. McKinstry, S. L. Durst, N. R. Franssen
Summary: The establishment of nonnative predators, such as Channel Catfish, poses a threat to native fish communities in the Colorado River basin. Research on the San Juan River revealed that the feeding behavior of Channel Catfish is influenced by water temperature, turbidity, and fish prey size. The estimated fish consumption of Channel Catfish in the river indicates a significant consumption of native fish, including endangered species like the Colorado Pikeminnow. Additional research on control strategies and prey population responses is needed to develop effective management strategies to mitigate the predatory impacts of nonnative species on native fish populations.
NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT
(2021)
Article
Marine & Freshwater Biology
Nathan St Andre, Beverly Roeder, Mark C. Belk
Summary: The invasion of quagga mussels affects the trophic niche of fish in Lake Powell, but the direction and magnitude of the effects vary significantly between different regions of the lake.
Article
Environmental Sciences
Milan Farkas, Sandor Szoboszlay, Lajos Voros, Zsofia Lovasz, Nikoletta Mehes, Kalman Matyas, Rozsa Sebok, Edit Kaszab, Judit Hahn, Gergo Toth, Peter Harkai, Arpad Ferincz, Andras Tancsics, Balazs Kriszt
Summary: Lake Balaton, the largest shallow lake in Central Europe, has successfully reversed eutrophication processes with the help of wetland areas. Floods and external nutrient load affect the composition of microbial communities, while decomposition of algae biomass in plant-covered areas has a significant impact on bacterial communities.
Article
Biodiversity Conservation
Weiguo Zhou, Peng Xu, Dewen Ding, Anning Suo, Mujiao Xie, Li Zhang, Weizhong Yue, Weihong He
Summary: This study compared the trophic structures and pathways of faunal assemblages in artificial reef ecosystems in Pearl River Estuary. The findings revealed differences in production patterns and the impact of environmental factors on the assemblages.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Sabina Llamazares Vegh, Fernanda Biole, Marta Bavio, Pamela Tripodi, Adolfo F. Gil, Alejandra V. Volpedo
Summary: This study assessed the concentration, bioconcentration, and bioaccumulation of ten trace elements in juvenile fishes in the Lower Parana River. The results showed that all studied species bioaccumulate certain elements and that feeding habits determine trace element concentrations, with significant differences observed between trophic guilds. Further studies are necessary to understand differential behavior between different species within the aquatic web, particularly in the crucial nursery area of the Parana floodplain.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Biao Li, Hongwei Wang, Anxing Lai, Jingya Xue, Qiong Wu, Chunyan Yu, Ke Xie, Zhendu Mao, Huabing Li, Peng Xing, Qinglong L. Wu
Summary: This study investigated the diffusive flux of methane (CH4) and its stable carbon isotope signature (delta C-13-CH4) in the Yangtze River. The results showed that the diffusive CH4 flux was 27.9 +/- 11.4 mu mol/m(2)/d and 36.5 +/- 24.4 mu mol/m(2)/d in wet season and dry season, respectively. The stable carbon isotope signature indicated that the river-estuary continuum is dominated by hydrogenotrophic methanogens.
Article
Engineering, Environmental
Dominic E. Ponton, Raphael A. Lavoie, Maxime Leclerc, Francois Bilodeau, Dolors Planas, Marc Amyot
Summary: Research shows that run-of-river dams and other watershed disturbances alter carbon processing, promote Hg methylation and its accumulation at the base of the food web, leading to a temporary increase in Hg levels in fish.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Marine
Diwakar Prakash, Chandra Bhushan Tiwary, Ram Kumar
Summary: This study investigated the ecological dynamics in the downstream of Hooghly River in India. The results showed that the water quality and abundance of planktonic organisms were higher in the downstream compared to the upstream. The study highlights the importance of river continuum, land-driven lateral discharge, and seawater intrusion in shaping the community structure of aquatic ecosystems.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
L. Rowenczyk, H. Cai, B. Nguyen, M. Sirois, M-C Cote-Laurin, N. Toupoint, A. Ismail, N. Tufenkji
Summary: Despite the importance of freshwaters to human health, the presence and fate of microplastics in marine estuaries have not been extensively studied. This research focused on the Saint-Lawrence River in Canada, analyzing surface water and marine bivalve samples along the river-to-sea continuum. The concentration of larger microplastics was higher in downstream areas compared to upstream areas, while the trend for smaller microplastics was less clear. Microplastics were also found in the digestive systems of bivalves, indicating their presence in the water column. This study provides valuable data on the fate of microplastics in a river-to-sea continuum.
JOURNAL OF HAZARDOUS MATERIALS
(2022)