Limnologica最新文献

{"title":"Periphyton bioaccumulation and biosorption potential: in-situ experiment in a eutrophic, mixohaline lake ecosystem (Tierra del Fuego, Argentina)","authors":"Amalia Lara Bursztyn Fuentes ,&nbsp;María Luciana Montes ,&nbsp;Patricia Rodríguez","doi":"10.1016/j.limno.2024.126156","DOIUrl":"10.1016/j.limno.2024.126156","url":null,"abstract":"<div><p>Periphyton is gaining relevance in bioremediation of polluted aquatic ecosystems because of its ubiquity and cost-effectiveness. The aim of this work was to study phosphorus and nitrogen bioaccumulation by periphyton grown on artificial substrata as a remediation strategy in two points (EB1 and EB2) in the Encerrada Bay, a mixohaline, eutrophic lake ecosystem in the City of Ushuaia (Tierra del Fuego, Argentina). In addition, the biosorption potential of the harvested periphytic biomass was assessed, using several organic molecules, including an emerging pollutant. Maximum nitrogen (N) accumulation was achieved after 4 months of colonization of the substrata for EB1 and 2 months for EB2 (1185.9 and 645.9 mg N m⁻², respectively). Also, maximum phosphorous (P) accumulation was achieved after 4 months of colonization of the substrata for EB1 and 2 months for EB2 (34.4 and 17.5 mg P m⁻², respectively). Once harvested, the dried biomass could be used in biosorption processes for different organic pollutants, as removal efficiencies were above 80% and 60% for dyes methylene blue and crystal violet, respectively, and almost 40% for the emerging pollutant oxytetracycline. These biosorption results are particularly interesting because it would suggest that it is a promising biomass reutilization strategy in the framework of circular economy.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"105 ","pages":"Article 126156"},"PeriodicalIF":1.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139924475","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-filled leaf axils in teasel plants: A study of often overlooked aquatic habitats","authors":"Jozef Oboňa ,&nbsp;Ivana Svitková ,&nbsp;Katarína Fogašová ,&nbsp;Peter Manko ,&nbsp;Michal Rendoš ,&nbsp;Marek Svitok","doi":"10.1016/j.limno.2024.126157","DOIUrl":"10.1016/j.limno.2024.126157","url":null,"abstract":"<div><p>Teasels (<em>Dipsacus</em> spp.) are among the few European plant species that can create small aquatic ecosystems, known as phytotelmata, in their leaf axils. However, these unique environments have received little research attention. We performed the first detailed study of phytotelmata in teasels, aiming to describe the physical habitat and macroinvertebrate communities across different leaf axil levels. We explored 64 phytotelmata on 20 teasel plants in Slovakia (Central Europe). These small aquatic ecosystems contained less than 100 ml of water, exhibited a pH ranging from slightly acidic to neutral, had very low oxygen content, and showed highly variable conductivity. We collected more than 1000 larvae of Diptera, representing at least ten aquatic invertebrate taxa. The dominant species found in these communities were the chironomid <em>Metriocnemus eurynotus</em> (Holmgren, 1883), followed by ceratopogonids of the genus <em>Dasyhelea</em>. The oldest, bottom-situated phytotelmata showed the highest invertebrate density and species richness, suggesting an important role of ecosystem age and the probability of colonization in the community assembly process. These highly replicated ecosystems with simple communities may serve as useful models for studying various ecological phenomena such as metacommunity dynamics, succession, community assembly, biodiversity-ecosystem functioning or mutualistic interactions.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"105 ","pages":"Article 126157"},"PeriodicalIF":1.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951124000100/pdfft?md5=b056f68e718cde15e82185e1fb07b8e1&pid=1-s2.0-S0075951124000100-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139949769","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":"Abrupt diatom assemblage shifts in Lake Baiyangdian driven by distinct hydrological changes and yet more so by gradual eutrophication","authors":"Xin Mao ,&nbsp;Linjing Liu ,&nbsp;Hongmei Zhao ,&nbsp;Yawen Ge ,&nbsp;Gaolei Jiang ,&nbsp;Lei Song ,&nbsp;Kai Ning ,&nbsp;Hua Zhao ,&nbsp;Peng Zhang","doi":"10.1016/j.limno.2024.126155","DOIUrl":"10.1016/j.limno.2024.126155","url":null,"abstract":"<div><p>Lake Baiyangdian, the largest natural freshwater wetland on the North China Plain, has faced multiple stressors from anthropogenic disturbances and climate change, affecting its aquatic ecosystem over the past century. An improved understanding of the relationship between environmental stresses and ecosystem responses and the mechanisms underlying ecological shifts has significant implications for managing the aquatic ecosystem in Lake Baiyangdian. In this paper, we reconstructed the ecological changes in Lake Baiyangdian over the past 70 years based on diatom assemblages in a sediment core and identified ecological shifts by the Sequential t test Analysis of Regime-shifts algorithm (STARS) and a sequential F test. Our results revealed two ecological shifts. The first ecological shift in the diatom community occurred in approximately 1963, which was associated with the rather abrupt changes, i.e., damming in the basin. This hydrological modification prolongs hydraulic residence time and accelerates nutrient retention, consequently leading to an increase in eutrophic species. Subsequently, the second ecological shift occurred in the 1990 s, which was attributed to sustained nutrient loading due to human activity intensification as well as an increase in the regional temperature. Ongoing nutrient loading finally pushed the lake toward a driver threshold, leading to an abrupt shift in the diatom assemblage. Our study details the complex trajectories of aquatic ecosystem shifts driven by hydrological alteration, increasing nutrient loading, and climate change in Lake Baiyangdian and highlights the processes by which ecological shifts occur in response to both abrupt and gradual stressors.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"105 ","pages":"Article 126155"},"PeriodicalIF":1.7,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139924645","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":"From shady ditches to artificial pools – Does mire restoration benefit aquatic invertebrates?","authors":"Maarja Vaikre ,&nbsp;Margus Voode ,&nbsp;Elin Soomets-Alver","doi":"10.1016/j.limno.2023.126141","DOIUrl":"10.1016/j.limno.2023.126141","url":null,"abstract":"<div><p><span>To combat the loss of wetlands and the services they provide, many are now being restored. Rewetting, usually by ditch blocking, is a common approach to restore drained wetlands, where it can create a supply of permanent artificial pools. We studied how aquatic macroinvertebrate abundance, species richness and communities respond to ditch blocking, and how the new lentic waterbodies contribute to the habitat value of these ‘restored’ ecosystems. The study system was a large before-after-control-impact (BACI) experiment along forested mixotrophic bog edges, where we sampled macroinvertebrates prior to and after the restoration that had created a total of 308 individual pools along former ditch channels. The mean abundance and taxon richness increased similarly in drain-blocked and control ditches between 2015 and 2021 but blocked and control ditches started to host distinct communities. Most pronounced changes were the decrease in the numbers of bivalves and plecopterans and the appearance of vagile species, such as odonatans, </span>hemipterans<span> and certain beetles and flies to blocked ditches, including several characteristic species. Overall, the restoration provided new habitats for aquatic macroinvertebrates, but the convergence of these communities toward natural transitional mire communities remains to be studied.</span></p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"104 ","pages":"Article 126141"},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495039","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":"Downscaling future land cover scenarios for freshwater fish distribution models under climate change","authors":"Annika Brunner ,&nbsp;Jaime R. García Márquez ,&nbsp;Sami Domisch","doi":"10.1016/j.limno.2023.126139","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126139","url":null,"abstract":"<div><p><span>The decreasing freshwater biodiversity trend can be attributed to anthropogenic impacts in terms of climate and land cover change. For targeted conservation efforts, mapping and understanding the distribution of freshwater organisms<span> consists of an important knowledge gap. Spatial modelling approaches offer valuable insights into present-day biodiversity patterns and potential future trajectories, however methodological constraints still hamper the applicability of addressing future climate and land cover change concurrently in one modelling workflow. Compared to climate-only projections, spatially explicit and high-resolution land cover projections have seen less attention, and the lack of such data challenges modelling efforts to predict the possible future effects of land cover change especially on freshwater organisms. Here we demonstrate a workflow where we downscale future land cover projection data from the Shared Socioeconomic Pathway (SSP) scenarios for South America at 1 km</span></span>²<span> spatial resolution, to then predict the future habitat suitability patterns of the Colombian fish fauna. Specifically, we show how the land cover data can be converted from plain numbers into a spatially explicit representation for multiple SSP scenarios and at high spatial resolution<span>, employing freshwater-specific downscaling aspects when spatially allocating the land cover category grid cells, and how it can be fitted into an ensemble species distribution modelling approach of 1209 fish species. Our toolbox consists of a suite of open-source tools, including Dinamica EGO, R, GRASS GIS and GDAL, and we provide the code and necessary steps to reproduce the workflow for other study areas. We highlight the feasibility of the downscaling, but also underline the potential challenges regarding the spatial scale and the size of the spatial units of analysis.</span></span></p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"104 ","pages":"Article 126139"},"PeriodicalIF":1.7,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138466998","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":"Association of coal fired power plants with river water quality in South Africa","authors":"Z. Ngamlana ,&nbsp;W. Malherbe ,&nbsp;G. Gericke","doi":"10.1016/j.limno.2023.126140","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126140","url":null,"abstract":"<div><p>The national power utility owns and operates approximately 95% of the coal-fired power plants (CFPPs) in South Africa. It has been hypothesised that power generation activities lead to the acidification and salination of surface water sources in the vicinity of CFPPs, with upwind sites more polluted than downwind sites. For the purpose of this study, three of power utility’s CFPPs were selected, namely Kriel, Komati and Camden Power Plants, which will be reaching the end of their operating lifespan during the mid-to-late 2020 s. The main aim of the study was to analyse the raw water quality data upstream and downstream of these three CFPPs. Raw water supply to the CFPPs for power generation was abstracted from the Rietspruit, Koringspruit and Witpuntspruit streams, respectively. To determine whether the particulate and gaseous emissions affected the water quality from 2012 to 2018, multivariate statistical analyses were applied. The water quality data indicated poor water quality both downwind and upwind of the power plants when thirteen out of 20 (65%) selected water quality variables exceeded the resource quality objectives (RQO) limits, which could be attributed to anthropogenic activities such as agriculture, coal burning and coal mining; causing increased acidity and salinity in the various water sources. In conclusion, the study suggested that there is no direct correlation between the emissions from coal burning and the coal-fired power plants receiving streams; an indication that power generation may not be the only anthropogenic factor influencing the water quality of the streams.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"104 ","pages":"Article 126140"},"PeriodicalIF":1.7,"publicationDate":"2023-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951123000919/pdfft?md5=f2e9a9355be1f2ba84724457286407ee&pid=1-s2.0-S0075951123000919-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138466997","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":"Theoretical understanding of morphological variations in diatoms","authors":"Lalit Kumar Pandey, Divyanshi Gupta, Sudeeksha Negi","doi":"10.1016/j.limno.2023.126127","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126127","url":null,"abstract":"Phenomenon of morphological variations (MV) is well known in diatoms. But, comprehensive study on MV in diatoms are still lacking. So, in the present study, data available on online image database “Diatoms of North America” (DONA) has been taken to explore MV phenomenon in diatoms at morphological and ecological basis. Our study for the time reported that MV phenomenon is more frequent in larger and asymmetrical diatoms than smaller and symmetrical forms. Similarly, in different life-forms and guilds, MV phenomenon is more less frequent in benthic and motile forms, respectively. In cosmopolitan diatom genus, the extent of MV reaches >90%, except araphid and monoraphid genus. Thus, from the finding of present study we conclude that MV phenomenon in diatoms is remarkable, which may affect diatomaceous research output expressed as taxonomical (deformities, biodiversity indices etc.) and non-taxonomical (lipid bodies, protoplasmic content etc.) metrices. In addition, the present study also helps to understand that whether MV phenomenon in diatoms is due to stress (especially climate change) or it is due to its natural tendency.","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"40 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":"135372001","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":"Seasonal community dynamics and toxicity potential of cyanobacteria in Lough Arrow, an oligo-mesotrophic lake in the north-west of Ireland","authors":"Darren Garland ,&nbsp;Henry Koehler ,&nbsp;Stephen McGirr ,&nbsp;Rachel Parkes ,&nbsp;Frances E Lucy ,&nbsp;Nicolas Touzet","doi":"10.1016/j.limno.2023.126124","DOIUrl":"https://doi.org/10.1016/j.limno.2023.126124","url":null,"abstract":"<div><p>Favourable water quality is paramount to ensuring the protection of natural habitats and the resources they provide. Phytoplankton are an important assessor of the health of aquatic ecosystems, particularly in lakes. As such, the characterisation of phytoplankton communities over time enables a detailed assessment of a water body’s ecological condition. This study examined the characteristics of cyanobacteria in Lough Arrow, a lake in Ireland’s northwest, over the course of a year to ascertain their community dynamics as well as potential for cyanotoxin production. DGGE analysis of 16 S rRNA gene amplicons for spherical cyanobacteria revealed seasonal shifts in Lough Arrow, with greater diversity in the summer and autumn. Non-metric multidimensional scaling showed that seasonal changes in the cyanobacterial community were largely driven by changes in environmental factors such as temperature and conductivity. The presence of the toxigenic species <em>Microcystis</em> sp. was confirmed from DGGE profiles. Analysis for the potential production of microcystin toxins in the lake was undertaken via qPCR analysis of the <em>mcyE</em> gene. No significant difference between the summer and autumn seasons was observed. Microcystin concentrations, estimated via the application of an ELISA assay, showed very low concentrations in the lake (max conc. 0.027 µg/l), which were not significantly different between the summer and autumn. The species richness and abundance of cyanobacteria in Lough Arrow was seasonal; responding dynamically to changes in environmental factors. The presence of <em>Microcystis</em> sp. and potential for microcystin production detected in the summer and autumn seasons indicating that the establishment of a tailored monitoring plan could be of benefit for better ascertaining and managing water quality parameters and potential risks to human and animal health.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"103 ","pages":"Article 126124"},"PeriodicalIF":1.7,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91987195","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":"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}