Influence of aquatic biodiversity on the self-purification of tropical rivers

Ecological Engineering, Journal Year: 2025, Volume and Issue: 212, P. 107540 - 107540

Published: Jan. 30, 2025

Language: Английский

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The role of crustacean zooplankton in water quality monitoring: Findings from two Portuguese reservoirs

Ecohydrology & Hydrobiology, Journal Year: 2025, Volume and Issue: unknown, P. 100646 - 100646

Published: Feb. 1, 2025

Language: Английский

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Ecosystem health evaluation of urban rivers based on multitrophic aquatic organisms

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 349, P. 119476 - 119476

Published: Nov. 22, 2023

Language: Английский

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Zooplankton as an Indicator: A Dramatic Shift in Its Composition Following a Sudden Temporal Brownification of a Tropical Oligotrophic Lake in Southern Mexico

Diversity, Journal Year: 2025, Volume and Issue: 17(1), P. 58 - 58

Published: Jan. 17, 2025

Lake Bacalar, a fragile oligotrophic ecosystem located in the southeast of Yucatan Peninsula, Mexico, suffered from sudden brownification after tropical storm Cristobal June 2020 Gulf Mexico. The color change was most visible effect storm, but all other water variables changed towards eutrophication. We used light traps and DNA barcoding zooplankton specimens based on previous baseline constructed for comparison with species found change. A dramatic shift community occurred: biomass reduced to minimum 20 mites, five copepods, three cladocerans, chironomids six fish larvae disappeared period at least one year. They were replaced by four copepod, 23 ephemeropteran previously not registered, being characteristic more eutrophic environments. southernmost part lake, Laguna Xul-Ha, which conserved its characteristics, apparently became refuge original fauna whole system. did fully recover condition until about two years later. While system has returned state described here, future changes land use, including unsustainable tourism expansion, may compromise resilience induce hysteresis.

Language: Английский

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Changes in Regional Practices and Their Effects on the Water Quality of Portuguese Reservoirs

Earth, Journal Year: 2025, Volume and Issue: 6(2), P. 29 - 29

Published: April 15, 2025

At the global level, numerous reservoirs exhibit a pronounced water degradation. Inadequate land use and climate change effects contribute to freshwater degradation disrupt ecosystem balances. This study aimed evaluate temporal spatial of surrounding area on two Portuguese reservoirs: Rabagão Aguieira. For each reservoir sub-watershed scale, evolution soil occupation pressures reported over past decade were analyzed. Additionally, official records quality parameters collected, was assessed according Water Framework Directive (WFD). Both show anthropogenic pressure, reflected in quality. has good quality, associated with undeveloped lands (47%), agriculture (26%), one pressure aquaculture sector. Aguieira is characterized by high nutrient concentrations, low transparency, phytoplankton. linked various uses, including forestry (75%), (19%), as well multiple environmental pressures. Key contributors include urban discharge (27 sites) catchments allocated for agricultural purposes (89 others. The long-term data showed an increase chlorophyll concentration, temperature, pH values, decrease concentration total phosphorus, but higher than reference value. usage hydrographic basin shows that it extremely important should be included WFD. Addressing problems areas essential adopting measures improve therefore guaranteeing health environment expected under One Health concept.

Language: Английский

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Does the herbicide active ingredient nicosulfuron show ecotoxic effects on aquaticorganisms and genotoxic effects on terrestrial plants?

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Environmental contamination by pesticides is of great concern, and herbicides are the most applied in agriculture. One widely used maize fields for post-emergent control weeds such as annual perennial grasses some broad-leaf plants based on active ingredient nicosulfuron. The nicosulfuron molecule relatively mobile can become bioavailable soil water, representing a toxicological risk to non-target organisms. Hence, this study investigated effects on: (1) induction micronuclei Vicia faba cells; (2) population growth rate microalgae Raphidocelis subcapitata; (3) the mobility microcrustacean Daphnia magna; (4) reproduction rotifer Brachionus calyciflorus. Nicosulfuron stimulated R. subcapitata after 72 h exposure. In contrast, highest concentration (100 mg L^-1) D. magna completely inhibited individuals 48 exposure, (15.36 B. calyciflorus inhibited their 100%. Furthermore, was cytotoxic at concentrations tested with V. faba, genotoxic 3.12 L^-1. As far we aware, first time have been plant model, demonstrate that compound ecotoxic aquatic media. Our advances knowledge organisms its presence environment.

Language: Английский

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Composition, Distribution, and Biodiversity of Zooplanktons in Tropical Lentic Ecosystems with Different Environmental Conditions

Arthropoda, Journal Year: 2024, Volume and Issue: 2(1), P. 33 - 54

Published: Jan. 31, 2024

A study was conducted to evaluate zooplankton species composition, abundance, and diversity in both natural artificial lakes with varying trophic levels determine the relationship between community structure lake environmental conditions. This hypothesized that correlations exist structures parameters associated eutrophication lakes. Sampling across 16 distinct freshwater lentic ecosystems Malaysia, including lakes/swamps, reservoirs, constructed lakes/ponds, old mining lakes, spanning a range of from mesotrophic hypereutrophic Physicochemical were measured situ, while water samples collected for nutrient analyses, as well identification enumeration. Throughout this study, total 58 species, consisting 36 rotifers, 12 cladocerans, 10 copepods, recorded. The highest density (365.7 ± 13.7 ind L−1) recorded lakes/ponds lowest shallow lakes/swamps (200.5 25.5 L−1). On other hand, significantly higher (p < 0.05) mean observed (H’ = 2.2 0.0); whereas, 1.5 0.1). canonical correspondence analysis (CCA) scores indicated Polyarthra vulgaris Chydorus ventricosus discriminating high transparency. Meanwhile, small-sized cladocerans (Ceriodaphnia cornuta) rotifers (Keratella spp., Brachionus Trichocerca spp.) most turbidity, nutrients, chlorophyll concentrations, which are main features reservoirs lakes/ponds. Low due low number dominance two Lophocharis curvata (38.8%) Ptygura libera (39.7%). Overall, specific resulted lower biodiversity compared ecosystems. elucidated influenced by conditions related status.

Language: Английский

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Landscape functioning in reservoir water quality prediction: Current use and predictive capacity

Ecohydrology, Journal Year: 2024, Volume and Issue: 17(7)

Published: Aug. 17, 2024

Abstract Reservoirs fulfil several societal needs, including water storage, energy production, flood control and recreation. However, the interruption of river continuum may cause quality declines that compromise use. The surrounding landscape is a key driver variation in space time, both across within catchments. Therefore, understanding how composition, structure functioning influence reservoir can help address management challenges. Here, we aim to investigate current use predictive capacity indicators for prediction. First, carried out literature review which factors are most frequently studied as drivers lentic systems. Then, tested four reservoirs Portugal using linear mixed models multi‐model inference. shows studies assess effects composition while rarely included. Our test suggests indicators, namely greenness brightness, complement improving predict total suspended solids, chlorophyll‐ , phosphorous. Landscape portrayed temporal variability ecosystem dynamics was not encompassed by or be relevant specific parameters. results show improve modelling contributions thus have great potential contribute monitoring, forecast systems ecological status.

Language: Английский

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Zooplankton community structure and diel migration patterns vary over hours, days, and years in the pelagic and littoral zone of a eutrophic reservoir

Journal of Plankton Research, Journal Year: 2024, Volume and Issue: 46(3), P. 307 - 322

Published: April 26, 2024

Abstract Zooplankton play an integral role as indicators of water quality in freshwater ecosystems, but exhibit substantial variability their density and community composition over space time. This zooplankton structure may be driven by multiple factors, including taxon-specific migration behavior response to environmental conditions. Many studies have highlighted communities across spatial temporal scales, the relative importance vs. time structuring dynamics is less understood. In this study, we quantified (a littoral a pelagic site) (hours years) eutrophic reservoir southwestern Virginia, USA. We found that was more variable among sampling dates 3 years than sites or hours day, which associated with differences temperature, chlorophyll a, nutrient concentrations. Additionally, observed high behavior, though slightly greater magnitude DHM DVM during each date, likely due changing Ultimately, our work underscores need continually integrate monitoring understand patterns ecosystems.

Language: Английский

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Assessment of Water Quality and Parasitofauna, and a Biometric Analysis of the Prussian Carp of the Romanian Lentic Ecosystem in Moara Domnească, Ilfov County

Water, Journal Year: 2023, Volume and Issue: 15(22), P. 3978 - 3978

Published: Nov. 16, 2023

The aim of this study was to perform a morphometric analysis Prussian carp individuals collected from the Moara Domnească pond in Ilfov County, Romania. This accompanied by physico-chemical characterization water, which sampled same location. Consequently, we analyzed total 60 that were caught April (N = 32) and May 2023 28). For Carassius gibelio site, provided, for first time, data on weight–length relationships (WLRs), Fulton K condition factor biometric features, including length (TL), standard (SL), head (HL), snout (SNL), body depth (BD), girth ratios TL/HL, as well TL/BD TL/SL. A negative growth type estimated both samples C. gibelio. Based other studies fishing reports, besides gibelio, there are another 11 species belong Cypriniformes order, two teleost members Perciformes order (Lepomis gibbosus Perca fluviatilis)—these also associated with habitat. Water 12 sampling points (SP), subjected characterizations consisted an assessment turbidity (T), pH, electrical conductivity (EC), chloride (Cl−), hardness (TH), oxygen regime parameters, phosphate phosphorus (P-PO43−), nitrate nitrogen (N-NO3−), nitrite (N-NO2−) ammonium (N-NH4+) levels. In addition, considering their characteristics (high toxicity, non-biodegradability, long-range atmospheric transport bioaccumulation potential), number organochlorine pollutants (OCPs) identified. values presented very significant correlation (r 0.5974 ***) pH 0.5854 ***). results allowed water be placed into quality classes established legislation, they discussed relation fishes’ requirements.

Language: Английский

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