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Spatiotemporal insights of phytoplankton dynamics in a northern, rural-urban lake using a 3D water quality model.
J Environ Manage
November 2024
Ville de Québec, Service de La Planification de L'aménagement et de L'environnement, 295 Boul, Québec City, Québec, G1K 3G8, Canada.
Lake St. Charles, located north of Quebec City, Canada, is a shallow fluvial lake with two distinct basins bridging rural and urban landscapes. Mainly used as a source of drinking water for 300,000 residents, the lake has faced a steady degradation in water quality due to urbanization and the discharge of domestic wastewater.
View Article and Find Full Text PDFClassifying eutrophication spatio-temporal dynamics in river systems using deep learning technique.
Sci Total Environ
December 2024
Department of Environmental Engineering, Pusan National University, Busan 46241, Republic of Korea. Electronic address:
Eutrophication is a major cause of water quality degradation in South Korea, owing to severe algal blooms. To manage eutrophication, the South Korean government provided the Trophic State Index (TSIko), which was revised according to Carlson's TSI. The TSIko levels were simulated using mechanistic water quality modeling.
View Article and Find Full Text PDFBeyond the Bloom: Unraveling the Diversity, Overlap, and Stability of Free-Living and Particle-Attached Bacterial Communities in a Cyanobacteria-Dominated Hypereutrophic Lake.
Microb Ecol
July 2024
State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
Article Synopsis
- In low-nutrient aquatic ecosystems, organic aggregates serve as nutrient hotspots and harbor a wide variety of microbial species compared to the surrounding water.
- The study examines bacterial diversity and community dynamics in hypereutrophic Lake Xingyun, revealing that free-living (FL) bacteria have higher diversity and distinct seasonal patterns influenced by cyanobacterial bloom intensity.
- FL bacterial communities displayed greater stability and complexity with competitive interactions, while particle-attached (PA) bacteria showed a more stochastic assembly and positive mutualistic interactions; these patterns differ from those seen in lakes with lower nutrient levels.
Short-term responses of littoral phytoplankton in a large shallow subtropical lake.
An Acad Bras Cienc
July 2024
Programa de Pós-Graduação em Recursos Hídricos e Saneamento Ambiental, Universidade Federal do Rio Grande do Sul, Instituto de Pesquisas Hidráulicas, Av. Bento Gonçalves, 9500, 91501-970 Porto Alegre, RS, Brazil.
The littoral zone is an essential compartment for lake biota because of its high productivity and diversity. Moreover, phytoplankton is expected to have non-equilibrium dynamics on it. The study's aimed to explore phytoplankton in the littoral zone of a shallow lake over a short-term scale.
View Article and Find Full Text PDFPast environmental changes: using sedimentary photosynthetic pigments to enhance subtropical reservoir management.
Environ Sci Pollut Res Int
March 2024
Environmental Sciences Program, Institute of Science and Technology, State University of Sao Paulo (UNESP), Sorocaba, SP, Brazil.
The historical impacts of eutrophication processes were investigated in six subtropical reservoirs (São Paulo, Brazil) using a paleolimnological approach. We questioned whether the levels of pigment indicators of algal biomass could provide information about trophic increase and whether carotenoid pigments could offer additional insights. The following proxies were employed: organic matter, total phosphorus, total nitrogen, photosynthetic pigments (by high-performance liquid chromatography), sedimentation rates, and geochronology (by 210 Pb technique).
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