Article
Multidisciplinary Sciences
Helena Exposto Novoselecki, Jose Luiz Catao-Dias, Ana Carolina Ewbank, Pedro Enrique Navas-Suarez, Aricia Duarte-Benvenuto, Henrique Christino Lial, Samira Costa Silva, Angelica Maria Sanchez-Sarmiento, Waleska Gravena, Vera Maria Ferreira da Silva, Vitor L. Carvalho, Miriam Marmontel, Carolina P. Bertozzi, Vanessa Lanes Ribeiro, Rodrigo del Rio do Valle, Juliana Marigo, Carlos G. das Neves, Fernando Esperon, Carlos Sacristan
Summary: The study revealed two types of herpesviruses in Bolivian river dolphins, while Amazon river dolphins were found to be negative for herpesviruses. A new gamma-herpesvirus was discovered in franciscanas, marking the first record of herpesvirus in Pontoporiidae.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
F. S. Pacheco, J. P. H. B. Ometto, L. Gomes, K. Tosto, M. Miranda, S. Loverde-Oliveira, D. D. Pessi, C. Cox
Summary: The study found that phosphorus balance in cropping systems in the Vermelho River watershed in Upper Pantanal, Brazil, is positive, while in grazing systems it tends to be negative. The positive balance in cropping systems is mainly due to high phosphorus inputs from mineral fertilizers and high soil phosphorus sorbing capacities, while the negative balance in grazing systems is a result of nutrient removal without replenishment.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Ecology
Grimardias David, Chasserieau Celine, Beaufils Morgane, Cattaneo Franck
Summary: The restoration of migration pathways for fish is crucial for the maintenance of populations in fragmented rivers. This study evaluated the efficiency of two vertical slot fishways for upstream fish migration and found that attractiveness was the major limiting factor to fishway efficiency.
ECOLOGICAL ENGINEERING
(2022)
Article
Developmental Biology
Joao Paulo Morais-Silva, Barbara Scorsim, Geovana Goncalves, Augusto Frota, Weferson Junio da Graca, Alessandra Valeria de Oliveira
Summary: A possible new species of Cnesterodon has been identified in the Ivai River basin, with distinct genetic differences from other Cnesterodon species. Its restricted distribution to only two sites and the disappearance of one of them suggests it is possibly already in serious danger of extinction.
Article
Zoology
Josiane Ribolli, Evoy Zaniboni-Filho, Carolina Barros Machado, Tailise Carolina de Souza Guerreiro, Patricia Domingues de Freitas, Pedro Manoel Galetti Jr
Summary: Genetic diversity of the migratory fish Salminus brasiliensis was found to be high, with potential collapse in genetic variability of populations from upstream dams. Population structure analysis revealed two spatial genetic populations, partially isolated by ancient natural barriers. The study results are crucial for informing local fishery policies and management actions for species conservation.
NEOTROPICAL ICHTHYOLOGY
(2021)
Article
Biodiversity Conservation
Jose Sabino, Fernando Maydana, Domingos Garrone-Neto
Summary: The golden dorado was observed following the green anaconda in a clearwater river of Midwest Brazil, which suggests a nuclear-follower feeding association. However, there were no direct observations of the dorados benefiting from the anaconda's activities.
Article
Ecology
Pablo Henrique dos Santos Picapedra, Elaine Antoniassi Luiz Kashiwaqui, Pitagoras Augusto Piana, Paulo Vanderlei Sanches
Summary: The study investigated the temporal reproductive pattern and use of different biotopes as areas of reproduction and initial development by analyzing larval density data of Salminus brasiliensis in the Parana River. The results showed that larvae in different stages were found in different biotopes, with pre-flexion and flexion stages mainly in the Parana River channel, and yolk-sac stage in the tributaries. Temperature, pH, and rainfall were found to be the main variables influencing larval density. Conservation efforts should focus on providing suitable conditions for migration and development in different biotopes of the Parana River.
ENVIRONMENTAL BIOLOGY OF FISHES
(2023)
Article
Environmental Sciences
Nicholas M. Preville, Eric B. Snyder, Dan O'Keefe, Scott Hanshue, Amy Russell, Justin Radecki
Summary: The river redhorse is a threatened species in Michigan. However, there is a lack of understanding of its habitat use outside of the spawning season. Research showed that river redhorse exhibited varying movement patterns during the summer, but established small home ranges after spawning. They strongly selected habitat with freshwater mollusks as a food source. Protecting these newly discovered feeding areas is crucial for the recovery of the species.
Article
Environmental Sciences
Adriana Fernandes Riveros, Julio Cesar Jut Solorzano, Isabelle de Almeida Monaco, Claudia Andrea Lima Cardoso, Yzel Rondon Suarez, Lucilene Finoto Viana
Summary: This study aimed to evaluate water quality and genotoxic effects on fish species in two sub-basins of the Paraguay River Basin. The results showed that the Apa River sub-basin had poorer water quality compared to the Negro River sub-basin, leading to more significant genotoxic damage in fish species due to metal concentrations.
Article
Environmental Sciences
Pamela A. Melo, Livia A. Alvarenga, Javier Tomasella, Carlos R. de Mello, Minella A. Martins, Gilberto Coelho
Summary: This study quantified the hydrological impacts of climate and anthropogenic changes in the Upper Grande River Basin and predicted potential future impacts on runoff based on climate model projections. The results showed that both climate and land-use changes have significant influences on the hydrological regime, with the expansion of agricultural areas being the main driver of anthropogenic impacts. Future climate projections indicate a reduction in average runoff, and the Budyko framework performed well in predicting future climate change impacts on water availability, similar to previous hydrological modeling studies in the same region.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Environmental Sciences
Zunyan Wang, Qi Li, Yulu Tian, Xi Li, Xingyu Chen, Yu Tian, Jie Xue
Summary: The Qinghai-Tibet Plateau is an ecologically fragile region, where changes in water quality and land use types greatly influence the phytoplankton community in rivers. It is important to study the relative influence of symbiotic factors on regulating human activities and river ecological protection.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Geography, Physical
Isabel T. Leli, Jose C. Stevaux, Mario L. Assine
Summary: The study focuses on the formation and evolution of Mutum Island in the Upper Parana River in Brazil, highlighting the unique depositional architecture and processes involved in the island's expansion. The findings contribute to a better understanding of large anabranching river systems.
Article
Plant Sciences
R. Soledad Ramos, Mariana Brea, Daniela M. Krohling, Silvina A. Contreras
Summary: The article describes and determines the fossil woods found in the El Palmar Formation in the Uruguay River basin. By analyzing the nearest living relatives and using mesomorphic and vulnerability indices, the study reveals that the paleoclimate during the Late Pleistocene was more humid and warmer than the present.
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
(2022)
Article
Environmental Sciences
Bin Liu, Jie Yang, Jinxia Sha, Yun Luo, Xian Zhao, Ruiting Liu
Summary: Land use has a significant impact on regional hydrological processes, influencing the runoff process and water cycle in watersheds. However, previous studies on runoff variations in the Hutuo River Basin have not adequately addressed the effects of land-use changes. This study used a soil and water assessment model to analyze the changes in runoff under different land-use scenarios and found that the increase in urban construction land and decrease in farming, forest area, and grassland have caused an increase in regional flood peak and annual runoff volume in the upper Hutuo River Basin.
Article
Environmental Studies
John P. Walden, Julie A. Hoggarth, Claire E. Ebert, Scott L. Fedick, Michael Biggie, Brett Meyer, Kyle Shaw-Mueller, Yijia Qiu, Weiyu Ran, Olivia P. Ellis, Tia B. Watkins, J. Britt Davis, Rafael A. Guerra, Christophe Helmke, Jaime J. Awe
Summary: Land use practices have significant impacts on household inequalities and political systems. This study investigates settlement patterns in relation to political structure, household wealth, ecological productivity, and agricultural techniques. The findings show that different trajectories of polity formation affect settlement location and land use practices of intermediate elites and commoners. The study emphasizes the importance of integrating land use practices into reconstructions of ancient political hierarchies.
