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Search Results (2)

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Keywords = Lanalhue basin

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18 pages, 11544 KiB  
Article
Spatio-Temporal Dynamics of the Lanalhue Lake Basin in South-Central Chile
by Lien Rodríguez-López, Patricio Fuentes-Aguilera, Lisandra Bravo Alvarez, Rebeca Martínez-Retureta, Iongel Duran-Llacer, Luc Bourrel, Frederic Frappart and Roberto Urrutia
Water 2025, 17(8), 1114; https://doi.org/10.3390/w17081114 - 8 Apr 2025
Viewed by 544
Abstract
Monitoring the evolution of freshwater lakes is critical for understanding and mitigating eutrophication, a major environmental issue driven by excessive nutrient inputs, primarily nitrogen and phosphorus. This study focuses on Lake Lanalhue, where rising frequencies and intensities of algal blooms highlight significant ecological [...] Read more.
Monitoring the evolution of freshwater lakes is critical for understanding and mitigating eutrophication, a major environmental issue driven by excessive nutrient inputs, primarily nitrogen and phosphorus. This study focuses on Lake Lanalhue, where rising frequencies and intensities of algal blooms highlight significant ecological imbalances. By evaluating spatio-temporal variations in water quality and quantity parameters, meteorological conditions, and land use changes, we aim to uncover the drivers of eutrophication and their complex interactions. Nutrient concentrations, dissolved oxygen levels, and phytoplankton biomass are analyzed alongside hydrological parameters such as water level, volume, and surface area. The influence of meteorological factors, including temperature, precipitation, and wind speed, is assessed to determine their role in stratification, mixing, and nutrient cycling. Additionally, land use changes in the watershed, such as urbanization and agricultural practices, are examined to understand external nutrient inputs. This integrative approach provides a comprehensive understanding of the mechanisms driving changes in Lake Lanalhue, offering critical insights into the development of sustainable management strategies to mitigate eutrophication and its ecological and socio-economic impacts. Full article
(This article belongs to the Section Water Quality and Contamination)
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19 pages, 3298 KiB  
Article
Trait Composition and Assemblage Structure Analyses of Lacustrine Fishes: Synthesizing a Proposal for Better Fishing Practices
by Gustavo Díaz, Evelyn Habit, Roberto Urrutia, Aliro Manosalva, Ricardo O. Barra and Ricardo Figueroa
Water 2024, 16(16), 2333; https://doi.org/10.3390/w16162333 - 20 Aug 2024
Viewed by 1694
Abstract
Fish provide ecosystem services and contribute to human well-being through fishing. In Chile, subsistence fishing provides food to local communities, whereas recreational fishing contributes to economic income via tourism. In the Lanalhue coastal lake basin, unregulated subsistence fishing and formal recreational fishing primarily [...] Read more.
Fish provide ecosystem services and contribute to human well-being through fishing. In Chile, subsistence fishing provides food to local communities, whereas recreational fishing contributes to economic income via tourism. In the Lanalhue coastal lake basin, unregulated subsistence fishing and formal recreational fishing primarily target large fish species to ensure satisfactory catches and food provision. However, the development of unplanned fishing activities and lack of scientific knowledge can lead to socioecological conflicts and tension between users. To address this issue, this study focuses on improving fishing practices through the analysis of fish assemblages of the Lanalhue lake basin. The life cycle traits of each fish species were analyzed, as well as their abundance and biomass in each habitat. Twelve fish species were identified, and their distribution and abundance explain the differences in fish assemblage composition and structure among habitats. To promote better fishing practices, we propose four target species and specific management actions. These include defining fishing seasons, delineating fishing sites, and establishing fishing quotas. This approach, considering both community structure and functional aspects of fish assemblages, can serve as a valuable guide for developing sustainable fishing practices in the Lanalhue coastal lake basin. Full article
(This article belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
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