Published: Jan. 1, 2024
Language: Английский
Environmental and Sustainability Indicators, Journal Year: 2024, Volume and Issue: 22, P. 100378 - 100378
Published: March 15, 2024
This study aimed at determining the relationship of chlorophyll a (Chl a) and nutrients in two reservoirs different sizes, namely Bueng Si Than Thung Sang, which are located Khon Kaen Province Thailand. The evaluation trophic state index estimated threshold amounts was consequently considered. Water samples were collected during both dry rainy seasons with twenty-seven sampling points each reservoir. Parameters indicating water quality based on APHA method. results showed significant difference average physicochemical properties nutritional parameters smaller proportion, having more than Sang (p < 0.05). Nutrient factors (TP, TKN) impact occurrence eutrophication season season. Average ratios Chl together revealed hypertrophic conditions reservoirs. high value a:TP signaled that algal growth these could be controlled by TP. Pearson correlation analysis indicated strong positive TP Than. Moreover, obtained from simulation achieved using MATLAB R2022a, performed fourth order polynomial equation, boundary values 28.25–29.42 μg/L 4.15-4.19 mg/L for TKN prior to Eutrophic occurrence, ascertain further management small-scale artificial
Language: Английский
Citations
4
Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 380, P. 125033 - 125033
Published: March 23, 2025
We analysed the effectiveness of agricultural best management practices (BMPs) for mitigating harmful algal blooms (HABs) in Mar Menor lagoon, Spain, by coupling SWAT + catchment and GOTM-WET lake models. compared different BMP scenarios, including "vegetative filter strips", "contour farming", "fertilizer reduction", "crop rotation", their combination reducing high chlorophyll a (Chl-a) events over period 2003-2022. All BMPs significantly reduced nutrient inputs entering which limited formation HABs. The scenario that combined all was most effective controlling HABs, decreasing numbers days with HABs 81 %, Chl-a 50 % during periods This mainly explained crop rotation, fertilizer reduction vegetative strips differentially (e.g. rotation nitrogen 47.4 phosphorus 31.8 %). Contour farming least inputs, thus (1.6 5.8 HAB). results suggest dynamics are controlled interactive effects forms, where orthophosphate plays key role initiating is then maintained concentrations. research underscores relevance effectively driven eutrophication coastal vulnerable aquatic ecosystems like Menor. Coupling SWAT+ models, moved beyond solely simulations allowed incorporation lagoon responses to HAB prevention.
Language: Английский
Citations
0
Remote Sensing Applications Society and Environment, Journal Year: 2025, Volume and Issue: unknown, P. 101531 - 101531
Published: March 1, 2025
Language: Английский
Citations
0
The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 978, P. 179391 - 179391
Published: April 16, 2025
The Mar Menor is a hypersaline coastal lagoon in the southeast of Spain, which has experienced several eutrophication episodes recent years. In 2022, an area milky white turbid water appeared covering about 10 % its surface, and it been there ever since. A comprehensive field research was set up to assess origin this possible whiting event, including identification continental inputs, satellite imagery analyses physico-chemical properties column, sediment, planktonic benthic communities. Our observations indicate that turned due precipitation authigenic (formed where currently located) calcite as described events occurring other marine areas. addition very high turbidity, affected showed increased nutrient chlorophyll concentrations compared rest lagoon. altered conditions also communities led complete disappearance previously abundant vegetation (Caulerpa prolifera), thus influencing biogeochemical cycles. Satellite images coupled with sediment core analysis suggest appears have begun unprecedented Menor. enhanced alkalinity semi-enclosed nature lagoon, along inflow may be producing favorable for calcium carbonate supersaturation since rising groundwater levels adjacent aquifer seem intensified discharge, contains HCO3-. This rise likely long-term increase recharge, induced by expansion irrigation practices, combination oscillations rainfall
Language: Английский
Citations
0
Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)
Published: July 21, 2023
Abstract The frequency and severity of extreme events related to climate change have intensified worldwide in the last decades. It is documented that increasing rainfall flooding cause more nutrient runoff into waterbodies, initiating numerous harmful algal bloom (HAB) events, especially fragile ecosystems. We analyze dramatic economic damage one these episodes Mar Menor, largest salt-water lagoon Europe. show when public perceived environmental degradation, return on housing investment was 43% lower surroundings than similar neighboring zones 6 years after HAB (2015). This represents a loss wealth 4000 million euros, around ten times gains changing from dry-farming irrigated crops, which makes this ecosystem fragile. Hence, we quantify some consequences ecological deterioration linked Global Climate Change.
Language: Английский
Citations
10
The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 905, P. 167806 - 167806
Published: Oct. 12, 2023
The levels of metals in the waters Mar Menor lagoon are higher southern than northern zone both dissolved (As: 1.78 μg L-1 north vs 1.86 south; Cd: 0.020 0.055 L-1; Pb: 0. 686 2.714 Zn: 3.06 10.2 L-1) as particulate fraction 13.6 g-1 27.3 0.510 2.11 g-1; 146 575 266 729 g-1). This difference is associated to influence historical and recent inputs from Sierra Minera Cartagena -La Unión located south lagoon. Strong winds cause sediment resuspension this shallow lagoon, increasing metal (twofold) especially (threefold) because resuspended sediments rich metals. Distribution among determined by chemistry each element salinity. increase causes reach limits very close those established Water Framework Directive, case lead, whose annual average level 1.23 1.3 Directive. Therefore, slight change environmental variables could make Pb exceed legal limits. Future work should focus on investigating how unique events, enhanced global change, affect cycles highly anthropised coastal areas.
Language: Английский
Citations
5
Water, Journal Year: 2023, Volume and Issue: 15(24), P. 4238 - 4238
Published: Dec. 10, 2023
Phytoplankton are dominant primary producers and key indicators in aquatic ecosystems. Understanding the controlling factors on structure of phytoplankton assemblages is fundamental, but particularly challenging at land–ocean interface. To identify patterns predictors assemblage Ria Formosa coastal lagoon (south Portugal), this study combined abundance along a transect between discharge point wastewater treatment plant inlet, over two years, with physico-chemical, hydrographic, meteo-oceanographic variables. Our identified 147 operational taxonomic units (OTUs), planktonic diatoms (60–74%) cryptophyceans (17–25%) dominated terms abundance. Despite strong hydrodynamics, lack spatial differences most diversity metrics, multivariate analysis revealed stations (p < 0.001) seasons 0.01). Indicator as generalists, 11 station-specific specialist OTUs, including Kryptoperidinium foliaceum Oscillatoriales (innermost stations) potentially toxigenic species (Pseudo-nitzschia Dinophysis; outer station, p 0.05). Water temperature, pH, nutrients emerged variables that best explained changes 0.001). findings provide insight into relevance local anthropogenic natural forcings can be used to support management RF other lagoons.
Language: Английский
Citations
3
Ocean & Coastal Management, Journal Year: 2024, Volume and Issue: 255, P. 107265 - 107265
Published: July 1, 2024
Pinna nobilis, an endemic bivalve species in the Mediterranean Sea, is critically endangered mainly due to devastating impact of protozoan parasite Haplosporidium pinnae. The population within Mar Menor lagoon (Murcia, Spain) represents one only two surviving populations along Spanish coast. This relict has witnessed a significant decline since 2016, primarily eutrophication episodes and other anthropogenic impacts affecting lagoon. It imperative identify most suitable zones for survival this species, where adult individuals could be translocated from affected areas enhance their chances survival. In present study, we these through Multi-Criteria Evaluation considering several factors that pose threat species. evaluation was complemented using Geographic Information Systems based multi-criteria decision analysis (GIS-MCDA). A total 18 were weighted combined, resulting surface area 307.92 hectares (2.28% lagoon) with over 70% high suitability
Language: Английский
Citations
0
Ingeniería del agua, Journal Year: 2024, Volume and Issue: 28(3), P. 198 - 212
Published: July 31, 2024
Los objetivos del trabajo son evaluar la evolución temporal y espacial de recarga al Acuífero Cuaternario Campo Cartagena desde 1970 a 2022 generar mapas entrada para un modelo numérico flujo agua subterránea. Para alcanzarlos se han recopilado datos meteorológicos, ha compilado contrastado información disponible sobre los usos suelo, poniendo especial atención en distribución espacial, calculado con el software VisualBALAN generado que reflejan durante periodo simulado, apoyo QGIS. La calculada calibrado validado éxito series piezométricas temporales. total media es 91 hm3 año-1 todo periodo; valores extremos 24 1978 172 2008. Esto traduce coeficiente promedio 16%, valor mínimo 8% máximo 24%.
Citations
0
Published: Jan. 1, 2024
Language: Английский
Citations
0