Limnologica最新文献

{"title":"Physico-chemical characterisation of protected lake habitats: A matter of dystrophy","authors":"Giovanni Cappelli ,&nbsp;Emma Gray ,&nbsp;Martin Gammell ,&nbsp;Cillian Roden ,&nbsp;Heather Lally","doi":"10.1016/j.limno.2023.126123","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126123","url":null,"abstract":"<div><p><span><span>Oligotrophic waters containing very few minerals of sandy plains (code 3110) and Natural dystrophic lakes and ponds (code 3160) are widespread freshwater lake habitats within Atlantic blanket bog<span> habitats. Despite being protected under Annex I of the European Union (EU) Habitats Directive, the conservation conditions of these lake habitats is considered bad and inadequate respectively. A lack of field data (including physico-chemical, algal, macrophytes and invertebrates) is preventing appropriate conservation condition assessments, and recommendations to maintain / restore favourable conservation condition. This research aims to characterise these lake habitats with water chemistry data from favourable conservation condition sites and determine their natural state, and to consider seasonal and regional variability to evaluate whether two lake habitats exist. Several water chemistry parameters were monitored in 24 waterbodies monthly for 12 months. Lake habitat 3110 were characterised by higher levels of pH, alkalinity, silica and dissolved oxygen, whereas, contrary to previous reports, levels of true colour and </span></span>dissolved organic matter (DOM) were lower in lake habitat 3160. However, all 24 sites were acidic with low alkalinity and slightly coloured, hence exhibiting dystrophic conditions. Principal Component Analysis highlighted a strong regional influence separating larger, coloured sites from smaller acidic and altitudinal sites. Differences in true colour were due to strong positive relationships between DOM and </span>catchment area confirming their influence on a regional scale. This research highlights an urgent need to gather physico-chemical field data from a wider range of protected lake habitats 3110 and 3160, and from across the EU to discern whether a gradient of dystrophy exists along which both habitats occur. Outcomes of such research would have implications on the reporting and conservation assessment of these lake habitats by Member States and help harmonise monitoring methods and provide more accurate assessment tools for their reporting under the EU Habitats Directive.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"103 ","pages":"Article 126123"},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134832681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Water quality and trophic state in Outer Puno Bay, Lake Titicaca, a high-altitudinal Andean lake","authors":"Maribel Baylón, Jorge L. Ramirez, Leonardo Mendoza-Carbajal, Silvia Aguilar, Aldo S. Pacheco","doi":"10.1016/j.limno.2023.126128","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126128","url":null,"abstract":"Lake Titicaca is the world's highest navigable freshwater lake. It is rich in biodiversity, although a variety of anthropogenic activities is harming it. As a result, knowing the water quality state is critical for maintaining optimal ecosystem health. The objective of this study was to evaluate the water quality by measuring physicochemical parameters, nutrients, heavy metals, and phytoplankton composition as a proxy of trophic state. During the years 2016 to 2018, 2020 and 2021, 14 samplings were carried out at four sites within Outer Puno Bay. Most physicochemical parameters were within the appropriate ranges of environmental quality. Phytoplankton was made by a total of 132 taxa including 23 Cyanobacteria, 54 Chlorophyta, 12 Charophyta, 37 Bacillariophyta, 5 Miozoa and 1 Ochrophyta. The electrical Conductivity exceeded the established limit value at all sampling sites. The results indicated that the water’s physicochemical quality presents optimal conditions. The diversity indexes (H') and the General Diatom Index (IDG) revealed that most of the sampling sites exhibit waters with medium to moderate pollution and are in the oligotrophic to mesotrophic state. Lake Titicaca shows pollution conditions that should be mitigated with the implementation of the relevant national environmental quality regulations.","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135410613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of extracellular enzymatic activity in the Aburrá-Medellín tropical river in Colombia as a response to variations in water quality and flow regime, in an urbanized basin","authors":"Alejandra Cifuentes Zapata, Lina Claudia Giraldo Buitrago, Néstor Jaime Aguirre","doi":"10.1016/j.limno.2023.126132","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126132","url":null,"abstract":"The Aburrá-Medellín river has been affected by urbanization processes in its basin, which has altered its physicochemical profile. In order to identify patterns in the enzymatic activity associated with variations in water quality and flow regime, the activity of the β-glucosidase and phosphatase enzymes, related to carbon and phosphorus metabolism, respectively, was measured in the water and biofilm. For this purpose, nine monitoring stations with different degrees of anthropic intervention were selected, which were evaluated during low, medium and high flow regimes associated with meteorological variability in the basin. The hypothesis was that the physicochemical profile, water quality and flow regime affect the activity of both enzymes, both in the water and in the biofilm, since they influence the concentration of nutrients transported by the river. According to the results obtained, no statistically significant differences were found in the enzymatic activity at low, medium and high flow rates, although a higher concentration of nutrients was observed at low and medium flow rates than at high flow rates. On the other hand, it was observed that the concentration of nutrients in the river changed according to the degree of urbanization in the basin, due to the discharge of wastewater from densely populated municipalities. The activity of both enzymes was higher in the stations with higher concentrations of nutrients, while in the monitoring stations located in the upper zone of the basin, where anthropic intervention and the concentration of nutrients was low, the lowest enzymatic activities were found both in the water and in the biofilm. In this regard, enzymatic activity can be used as an indicator of the health of the Aburrá-Medellín river and it is suggested that the measurement of this variable be included in the framework of the RedRío monitoring network.","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"35 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135410779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Withdrawal notice to “Seasonal monitoring of the River Nile in the area of Greater Cairo using a combined approach of certain chemical criteria and macroinvertebrates matrices” [Limnologica 103 (2023) 126119]","authors":"Hanaa M.M. El-Khayat ,&nbsp;Mohamed R. Habib ,&nbsp;Wafaa A. Mohammed ,&nbsp;Khaled M. Zayed ,&nbsp;Sara S.M. Sayed","doi":"10.1016/j.limno.2023.126137","DOIUrl":"10.1016/j.limno.2023.126137","url":null,"abstract":"","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"103 ","pages":"Article 126137"},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951123000889/pdfft?md5=7f50b0226f01524c731f592a46d99752&pid=1-s2.0-S0075951123000889-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Marine intrusions drive short-term and long lasting changes on limnological dynamics along the water column of a tropical coastal lagoon","authors":"Jorge Gabriel Fernandes Genovez, Théo Dias Arueira, Luís Alfredo dos Santos Prado, Giovanna Figueiredo Lima da Silva, Claudio Cardoso Marinho, André Luiz dos Santos Fonseca, Murilo Minello, Daniel Basílio Zandonadi, Rodrigo Lemes Martins, Francisco de Assis Esteves, Anderson da Rocha Gripp","doi":"10.1016/j.limno.2023.126134","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126134","url":null,"abstract":"Non-tidal coastal lagoons are widespread aquatic ecosystems distributed along coastlines. They exhibit complex limnological dynamics influenced by geomorphology, land use, atmospheric processes, and oceanic exchange. Although such shallow ecosystems are described as vertically homogeneous, sandbar breaching events can quickly modify the water column by promoting seawater intrusion, which is the primary driver of changes in water quality and ecological functioning in the short term. However, the duration of sandbar breaching effects on the vertical distribution of limnological variables was rarely evaluated. In this study, we investigated the impact of an episodic marine intrusion on the water column characteristics of Jurubatiba lagoon, a tropical coastal ecosystem, for 12 months following a sandbar breaching event to elucidate the duration of its effects. Marine intrusion resulted in salt wedges formation in the short-term, leading to stratification in dissolved oxygen, pH, salinity, and chlorophyll-a concentration along the water column for at least four months. However, rainfall and temperature also emerged as crucial factors driving vertical heterogeneity in limnological variables, influencing water density, pH, and turbidity throughout the study period. Wind speed had marginal effects on thermal stratification, probably due to the lagoon's orientation in the landscape. Our data unveiled that, despite their shallowness and wind exposure, coastal lagoons can exhibit significant vertical heterogeneity in limnological variables due to various climatic and hydrodynamic drivers. Notably, the effects of marine intrusions on salinity and ectogenic column stratifications can persist for several months, affecting water quality and, probably, biotic communities and ecosystem functioning. Once human activities and climate change may intensify marine intrusions on coastal lagoons, understanding these dynamics and their drivers is fundamental to anticipating their effects and conserving such vulnerable ecosystems.","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"2 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135371997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive Water Quality Analysis of Deze Reservoir Using Multiple Evaluation Methods","authors":"Chenchen Zhang, Qian Yu","doi":"10.1016/j.limno.2023.126129","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126129","url":null,"abstract":"To conduct a comprehensive analysis of water quality disparities in the Deze Reservoir and investigate the factors influencing its water quality, this study focuses on the Deze Reservoir as its research subject. It employs various evaluation methods, including the single-factor assessment method, the Nemero comprehensive pollution scoring method, the comprehensive pollution index method, principal component analysis, and the Canadian water quality index method, to scrutinize the dynamic changes in reservoir water quality and assess the reservoir's nutrient status.The findings revealed the following key points:(1) The single-factor assessment method swiftly classified the water quality of the Deze Reservoir as Class V, primarily influenced by a single factor, total nitrogen.(2) Both the Nemero index method and comprehensive pollution index method provided a more comprehensive assessment of the Deze Reservoir's water quality. Considering additional parameters for evaluation resulted in more accurate water quality scores, aligning better with the criteria for water quality assessment. Specifically, the Nemero index method indicated that the majority of the water bodies in the Deze Reservoir exhibited poor quality, with an average score of 7.17. Results from the comprehensive pollution index method suggested that the water bodies in the Deze Reservoir generally experienced mild pollution, with total nitrogen being the primary contributing factor (classified as Class IV, according to the standard index.(3) Principal component analysis revealed that nitrate, phosphate, dissolved oxygen, and total nitrogen had significant loadings on the principal components, making them the primary factors influencing water quality in the Deze Reservoir. Calculating and ranking the comprehensive scores from the principal component analysis method made it evident that pollution levels in Hallzitang and Sanchakou were more severe compared to the rest of the reservoir area. (4) Results from the Canadian water quality index method demonstrated that water quality in the Deze Reservoir exhibited both spatial and temporal patterns. Initially, water quality tended to deteriorate, followed by gradual improvements over time. Interestingly, a positive feedback relationship was observed between water intake and water quality. In summary, the assessment results obtained from the five water quality evaluation methods consistently highlighted total nitrogen as a crucial indicator of water pollution in the Deze Reservoir. This association can primarily be attributed to agricultural non-point source pollution in upstream areas, nutrient runoff from nearby agricultural land, and surface runoff contributing to water nutrient levels. From both spatial and temporal perspectives, the dominant factor influencing the Deze Reservoir's water quality is the influx of total nitrogen pollution.","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"53 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135454975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"WITHDRAWN: Heavy metal concentrations, water quality and health risk assessment of freshwater fish from the Lake Chad basin","authors":"Musa Isiyaku Ahmed ,&nbsp;Abdulganiyu Ambali ,&nbsp;Solomon Ngutor Karshima ,&nbsp;Kaltume Mamman Mohammed","doi":"10.1016/j.limno.2023.126135","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126135","url":null,"abstract":"<div><p>This article has been withdrawn: please see Elsevier Policy on Article Withdrawal (<span>https://www.elsevier.com/about/policies/article-withdrawal</span><svg><path></path></svg>).</p><p>This article has been withdrawn at the request of the editor and publisher.</p><p>The publisher regrets that an error occurred which led to the publication of this paper. This error bears no reflection on the article or its authors. The publisher apologises to the authors and the readers for this unfortunate error.</p><p>The full Elsevier Policy on Article Withdrawal can be found at <span>http://www.elsevier.com/locate/withdrawalpolicy</span><svg><path></path></svg>.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"103 ","pages":"Article 126135"},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951123000841/pdfft?md5=227343be1622cc61df32c0a97f48a18c&pid=1-s2.0-S0075951123000841-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92115753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Submerged macrophytes enhance carbon emission (CO2 and CH4) from the freshwater wetland in Keibul Lamjao National Park, Manipur, India","authors":"Suraj S. Chingangbam,&nbsp;R.S. Khoiyangbam","doi":"10.1016/j.limno.2023.126125","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126125","url":null,"abstract":"<div><p><span><span>Worldwide, the exacerbation of global warming has accelerated the growth of </span>submerged macrophytes in wetlands, thereby substantiating the supply of labile substrates for carbon (CH</span>₄ and CO₂<span>) emissions. Nevertheless, limited studies have been conducted on carbon emission from tropical wetlands with submerged macrophytes. In the current study an attempt has been made to reveal the role of submerged macrophytes in influencing carbon flux from a natural wetland in the Indo-Burma Biodiversity hotspots. The submerged macrophytes colonising the shallow freshwater wetland of Keibul Lamjao comprise of </span><span><em>Hydrilla verticillata</em></span>, <span><em>Ceratophyllum demersum</em><em>,</em></span> and <span><em>Potamogeton crispus</em><em>,</em></span> with primary productivity at community level ranging between 20.72 and 152.53 g m^-2 d^-1 (mean, 95.6 ± 54.66 g m^-2 d^-1). This study gives a comparative analysis of the carbon gases (CH₄ and CO₂) emission in two distinct zones of the wetland: areas with profuse submerged macrophytic growth and water free of macrophytes. The mean CO₂ and CH₄ emissions from the zone with submerged macrophytes were 8362.64 ± 2935.57 and 227.90 ± 73.50 mg m^-2 d^-1, respectively, compared to 5558.07 ± 1222.05 and 149.72 ± 20.44 mg m^-2 d^-1 from those without macrophytes. The CO₂ and CH₄<span><span> emissions peak during the summer and wane in the following seasons, with minimum emissions occurring during the winter. It is apparent from the results that the generation of the gases in the wetland was temperature dependent, plus the macrophytic detritus availability. The carbon emissions were significantly correlated with the </span>physicochemical properties<span> of the water and the lake bottom sediment. A significantly positive correlation between carbon emission and dissolved organic carbon (DOC) and organic matter (OM) was established in the zone with macrophytes, thereby revealing that the growth of submerged macrophytes in the wetland enhances atmospheric carbon emissions.</span></span></p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"103 ","pages":"Article 126125"},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134656050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feeding ecology of two sympatric Cyprinidae, Sarmarutilus rubilio (Bonaparte, 1837) and Scardinius erythrophthalmus (Linnaeus, 1758) in Sidi Salem reservoir (Tunisia)","authors":"DJAIT Houda, BEN HASSINE Oum Kalthoum, LAOUAR Houcine, SFAR-BAHRI Lilia","doi":"10.1016/j.limno.2023.126131","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126131","url":null,"abstract":"The provided information outlines a study conducted on the diet and feeding relationships of two species, Sarmarutilus rubilio (near threatened) and Scardinius erythrophthalmus, in the largest water reserve in Tunisia, Sidi Salem. Both species are introduced and are the most abundant in the reservoir. They share the same food resources, with macrophytes being the primary component of their diet, especially for S. erythrophthalmus, Macrophytes accounting for 77.78% of its diet. The second most important prey category for both species is Arthropoda. Additionally, there are other prey categories such as Cyanobacteria, Microalgae, Nematoda, and Sand, but these are ingested by both species in lower proportions (%PV < 1.5). S. rubilio, outside its native area, maintains its feeding plasticity The study revealed some differences in the diet of the two species. For S. erythrophthalmus, variations in diet were observed among seasons, while for S. rubilio, variations were observed among different stations within the reservoir. Both species were found to have narrow niche breaths, indicating specialized feeding habits. Despite these variations, the diets of the two species showed significant overlap. The research highlights the feeding ecology of S. rubilio and S. erythrophthalmus outside their native range. This information can be valuable for developing future fishery management plans and biodiversity preservation strategies in Tunisian freshwater systems. Understanding the feeding preferences and interactions between these introduced species can aid in maintaining a balanced ecosystem and conserving the native species in the region. Considering that S. rubilio is categorized as near threatened, such knowledge becomes even more crucial for effective conservation efforts.","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"16 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135221334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Withdrawal notice to “Heavy metal concentrations, water quality and health risk assessment of freshwater fish from the Lake Chad basin” [Limnologica 103 (2023) 126135]","authors":"Musa Isiyaku Ahmed ,&nbsp;Abdulganiyu Ambali ,&nbsp;Solomon Ngutor Karshima ,&nbsp;Kaltume Mamman Mohammed","doi":"10.1016/j.limno.2023.126138","DOIUrl":"10.1016/j.limno.2023.126138","url":null,"abstract":"","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"103 ","pages":"Article 126138"},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951123000890/pdfft?md5=bdd104b27a28b55378a0003648e7b3de&pid=1-s2.0-S0075951123000890-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}