Journal of Limnology最新文献

{"title":"Influence of water quality and seasonal variations on freshwater macroinvertebrate diversity and community structure in wastewater treatment ponds, Phetchaburi Province, Thailand","authors":"Wasinee Thongdang, R. Chaichana","doi":"10.4081/jlimnol.2024.2178","DOIUrl":"https://doi.org/10.4081/jlimnol.2024.2178","url":null,"abstract":"Wastewater originating from the Phetchaburi municipality undergoes treatment in a series of five distinct stages at the King’s Royally Initiated Leam Phak Bia Environmental Research and Development Project (LERD) in Phetchaburi province, Thailand. These stages involve a sedimentation (pond 1), three oxidation ponds (ponds 2 to 4), and a final stabilization pond (pond 5). These ponds serve as habitats for macroinvertebrates; consequently, their diversity and composition might be influenced by fluctuations in water quality and seasonal variations. The primary aim of this research was to analyze the diversity and species composition of macroinvertebrate communities concerning varying levels of organic contamination across the five wastewater treatment ponds at LERD. This investigation spanned three seasons: cold season (December 2019), rainy season (July 2020), and hot season (April 2021). The findings revealed that the diversity and species composition of macroinvertebrate communities displayed distinct alterations across multiple environmental gradients, especially identifying the significant influence of organic loading levels observed in ponds 1 to 5. The macroinvertebrate communities exhibited two distinct groupings, with the Chironomidae and Candonidae or ostracods prevailing prominently in ponds 1 and 2 (heterogenous environments). This prevalence was attributed to the high levels of detrital food and the robust resilience of chironomid larvae and ostracods to organic pollution, thriving even in environments characterized by low dissolved oxygen levels. Conversely, the prevalence of snails from the Thiaridae family in ponds 3 to 5 (homogenous environments) indicated improved water quality conditions, notably lower organic matter levels, and a higher dissolved oxygen content. In addition, the study identified seasonal variations in macroinvertebrates, likely influenced by the differing organic loading and environmental conditions. Thus, this research provided insights into the factors shaping macroinvertebrate communities in a wastewater treatment system.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141385454","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":"Polarised light pollution on river water surfaces caused by artificial light at night from illuminated bridges and surroundings","authors":"Catherine Pérez Vega, F. Hölker, K. Zielinska-Dabkowska, Andreas Jechow","doi":"10.4081/jlimnol.2024.2173","DOIUrl":"https://doi.org/10.4081/jlimnol.2024.2173","url":null,"abstract":"Bridge illumination gave rise to night-time illuminated paths across aquatic systems. However, if bridge artificial light at night (ALAN) reach waterbodies, it can result in polarised light pollution (PLP), which might alter the optical conditions of a river by night and potentially interfere with moonlight polarisation signals reflected off the water’s surface. It is a night-time phenomenon that can detrimentally change the behaviour of organisms sensitive to horizontally reflected polarised moonlight, a navigational cue and signal known to be used by flying water-seeking insects to detect suitable aquatic habitats to reproduce and lay eggs. In this study, we quantify the reflection of ALAN-induced polarisation patterns at the water’s surface near seven illuminated bridges crossing the river Spree in Berlin. The photometric data shows that bridge illumination induces PLP, which reflects from the water’s surface when measured at specific locations in space considered as potential flying paths for polarotactic aquatic insects. ALAN-induced polarisation findings at illuminated bridges suggest that PLP is a pollutant that illuminates aquatic areas. It requires better research as it can potentially affect polarimetric navigation in flying aquatic insects. As the extent of light pollution reaches riverine systems and aquatic habitats, the potential effects of PLP on freshwaters need the proper development of sustainable lighting solutions that can aid in preserving riverine nightscapes.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108065","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":"Diet-tissue discrimination factors of three neotropical freshwater fishes and a comparison of the trophic position","authors":"G. I. Manetta, Matheus Maximilian Ratz Scoarize, Driele Delanira-Santos, P. A. Sacramento, V. D. A. Urbano, E. Benedito","doi":"10.4081/jlimnol.2023.2159","DOIUrl":"https://doi.org/10.4081/jlimnol.2023.2159","url":null,"abstract":"The trophic discrimination factor (TDF) is a key parameter for stable isotope analysis and due to a lack of species-specific TDFs, mean universal values have been used, resulting in uncertainties about the trophic position of species and a call for more experiments. In this study, we have addressed the lack of experimental species-specific TDFs conducting three experiments of 128 days each to determine the TDF (muscle and liver) of three species, the piscivore Pseudoplatystoma corruscans (Spix & Agassiz, 1829), and the omnivores Piaractus mesopotamicus (Holmberg, 1887) and Astyanax lacustris (Lütken, 1875), tropical fishes native to the La Plata River basin. Then, we calculated the trophic position (TP) using the mean universal TDF from literature and the species-specific TDF produced in this study for Pseudoplatystoma corruscans. We estimated the TDFs for the three species through experiment and the values found differed from the mean universal TDF in the literature. Moreover, the TP was lower when using the species-specific TDFs. The TP is important for several analyses, including its use in functional diversity. Therefore, we recommend using species-specific TDF values for calculating TP once it differs from the results calculated with mean universal TDF.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948780","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":"Impacts of the Koka hydropower dam on macroinvertebrate assemblages in the Awash River Basin in Ethiopia","authors":"Melaku Getachew, S. T. Mereta, Geremew Sahlu Gebrie, W. Mulat, Mary Kelly-Quinne","doi":"10.4081/jlimnol.2023.2153","DOIUrl":"https://doi.org/10.4081/jlimnol.2023.2153","url":null,"abstract":"The Koka hydropower dam is one of the oldest large dams in Ethiopia. Damming is one of the anthropogenic activities impacting the distribution of aquatic life forms. However, to date, little attention has been focused on the dam’s impacts on the river macroinvertebrate assemblages in Ethiopia. The objective of this study was, therefore, to assess the impacts of the Koka hydropower dam on macroinvertebrate assemblages in the Awash River basin in Ethiopia. In the three river reaches on the Awash River (upstream near the source of the river, midstream above the dam, and downstream below the dam), a total of 15 sites were selected for sampling. The statistical analysis tested the null hypothesis that there are no differences in macroinvertebrate assemblage patterns or a range of univariate metrics between the three river reaches. Additional analyses involved the identification of taxa responsible for significant differences in macroinvertebrate structure (e.g., percentage similarity) and an exploration of the variables that structure macroinvertebrates (e.g., canonical correspondence analysis). In the upstream, midstream, and downstream reaches of the Awash River, we recorded a total of 73 taxa belonging to 43 families and 12 orders. Trichoptera was the dominant order in the upstream river reach, whereas Diptera dominated the midstream and downstream river reaches. The diversity of macroinvertebrates decreased from upstream to midstream and downstream. The three river reaches differed significantly in Shannon and Simpson diversity indices, % EPT, EPT taxa abundance, total taxa richness, evenness index, % collectors, and % scrapers. In this study, we observed that macroinvertebrate assemblage differences and spatial patterns were significantly associated with values of river flow changes (velocity), phosphate concentration, and substrate index. The findings of this study have broad implications for the assessment of the impacts of dam construction on the rivers of the studied region in the future.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139004953","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":"Lake Sevan. Past, present, and future state of a unique alpine lake","authors":"Gayane Shahnazaryan, Martin Schultze, Karsten Rinke, B. Gabrielyan","doi":"10.4081/jlimnol.2022.2168","DOIUrl":"https://doi.org/10.4081/jlimnol.2022.2168","url":null,"abstract":"Lake Sevan, a large, deep, alpine lake in the Lesser Caucasus is the focus of this Special Issue of the Journal of Limnology. It was an outstanding ecosystem 100 years ago characterised by excellent water quality, rich biodiversity with a high level of endemism, wide-ranging beds of macrophytes along the shores and a productive and sustainable fish production. Due to its beauty, natural history, and contributions to social and economic welfare it is also a cultural heritage for the Armenian Nation including its large diaspora.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139243299","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":"Contemporary community composition, spatial distribution patterns, and biodiversity characteristics of zooplankton in large alpine Lake Sevan, Armenia","authors":"A. Hayrapetyan, Gor A. Gevorgyan, Martin Schultze, Muhammed Shikhani, T. Khachikyan, Aleksandr Krylov, Karsten Rinke","doi":"10.4081/jlimnol.2022.2150","DOIUrl":"https://doi.org/10.4081/jlimnol.2022.2150","url":null,"abstract":"We studied the quantitative composition, spatial distribution, and temporal dynamics of the zooplankton community of the alpine Lake Sevan, Armenia, the largest surface water in the Caucasus region. This article is providing a long-term information and fills the research gap of multiyear data on zooplankton, as the previous research on zooplankton provided only snapshots of the community, and a consistent assessment over multiple years was missing. However, an initial mini-review of historical studies indicated that zooplankton biomass and fish abundance were undergoing large fluctuations, indicating the importance of top-down control. We analysed 239 samples from the period 2016-2019 from 32 sampling sites in Lake Sevan and recorded 37 species of meso- and macrozooplankton (Rotifers, Copepods, Cladocera). Biomass fluctuations were high with peaking biomasses in 2016 and lowest biomasses in 2018, yearly averaged biomass varied about one order of magnitude. Variability over time was hence much higher than spatial variability. The pelagic habitat at the deepest part of the lake showed the highest diversity and biomasses but contrasts between sampling sites remained smaller than changes from year to year or seasonally. Many samples were dominated by a single species, and these key species explain observed biomass dynamics to a wide extent. We applied hierarchical clustering in order to identify phenological groups that appear to show similar patterns of occurrence. This clustering resulted in 6 groups where of 5 groups just consisting of one single species and these 5 key species were the Cladocerans Daphnia magna, Daphnia hyalina, Diaphanosoma sp. as well as the calanoids Arctodiaptomus bacillifer and Acanthodiaptomus denticornis. The most important species in Lake Sevan’s zooplankton during the observation period was D. magna, which reached high biomasses in 2016 and 2017 but then suddenly almost disappeared in 2018 and 2019. When there were more D. magna present, the water became clearer, which was measured using Secchi depth. This shows that these large water fleas effectively controlled the amount of phytoplankton in the water. Daphnia magna, in turn, managed to dominate zooplankton community only during times of extremely low fish biomass indicating strong top-down control of this large Cladoceran by fish. Both observations together imply a strong trophic linkage between fish, zooplankton, and phytoplankton and provide evidence for trophic cascades in Lake Sevan. Besides the novel insights into zooplankton community dynamics of this unique lake of high socio-economical, cultural, and ecological importance, our study also points to potential management opportunities for eutrophication control by biomanipulation, as well as our investigation allows us to conclude that probably biotic factors were more important than abiotic factors in explaining the observed changes and dynamics within the plankton community.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139242457","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":"Multidecadal analysis of Lake Garda water balance","authors":"L. Hinegk, L. Adami, S. Piccolroaz, Marina Amadori, Marcello Moretti, Marco Tubino, M. Toffolon","doi":"10.4081/jlimnol.2023.2144","DOIUrl":"https://doi.org/10.4081/jlimnol.2023.2144","url":null,"abstract":"Lake Garda, the largest in Italy, is a major source of water supply inserted in a trans-regional area, sustaining an ever-increasing variety of water interests since the XX century. We perform a multidecadal (1928-2020) water balance, estimating the long-term evolution of the input and output components under changing anthropogenic and climatic stressors. First, we present our hydrometeorological database, assembled through a consistent effort of collection and digitization of data from different sources. Then, we analyse the annual water balance, assessing the magnitude of the residual term, i.e. the unknown term that embeds uncertainties and potential sources of error, closing the water balance equation. Uncertainties are investigated by applying a multi-method analysis for over-lake evaporation and basin evapotranspiration. Land use evolution, contributions from the Mount Baldo area as well as the potential role of groundwater fluxes are additionally analysed. Eventually, we compute a sensitivity analysis to delineate the role of each component on the lake’s level and outflow variations. The long-term analysis allows for distinguishing some trends in the input and output components of the water balance. Differences emerge in the periods before and after the lake’s impoundment (1951), and some effects of climate modifications appear in the last decades. Precipitation over the basin has a major influence on the water availability within the basin, a result confirmed by the sensitivity analysis. The entity of the residual term, which represents the unaccounted contributions, calls into question the role of the groundwater fluxes and the time scale of the analysis. The multi-method analysis highlights the dependency of the different lake evaporation and basin evapotranspiration methods on the amount of data available.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256746","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":"The prevalence of Atribacteria affiliated with JS1 in the sediment core of Lake Sayram, the largest alpine lake, China","authors":"Keqiang Shao, Tunasheng Ba, Boqiang Qin, Jianying Chao, Guang Gao","doi":"10.4081/jlimnol.2023.2152","DOIUrl":"https://doi.org/10.4081/jlimnol.2023.2152","url":null,"abstract":"Atribacteria play an important role in global carbon cycling. Little is known, however, about the Atribacteria communities found inalpine lakes. The presence and diversity of Atribacteria in the sediment core of alpine Sayram lake in China were investigated usingIllumina MiSeq sequencing in this study. According to the findings, Atribacteria affiliated with JS1 were dominant in the sediment coreof Sayram Lake, with a relative abundance of 0.19 to 10% (average 3.75%) of all bacterial sequences. Furthermore, the relativeabundance of Atribacteria associated with JS1 increased with sediment depth. As a result, this study significantly contributes to ourunderstanding of Atribacteria community habitat.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139258714","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":"A procedure to update quality indices based on species abundances: an example using the EPI-L diatom index","authors":"Aldo Marchetto, S. Musazzi","doi":"10.4081/jlimnol.2023.2151","DOIUrl":"https://doi.org/10.4081/jlimnol.2023.2151","url":null,"abstract":"We propose a procedure to update ecological quality indices using species autoecology estimated by gradient analysis when new species are found, or taxonomy is updated. When updating an index, the new values must be comparable to the old ones to avoid recalibration and quality class boundary changes. As gradient length influences the values of the species optima, we propose to avoid adding new species to existing lists and we suggest recalibrating the index with a new calibration dataset and rescaling species optima. This final step reduces index updating-induced quality classification changes. An example is shown using the EPI-L diatom index, a quality index for lakes affected by trophic pressure.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139255213","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":"Correlation between Phragmites australis growth and seasonal lake level variations in Lake Maggiore (Italy/Switzerland): common reed management guidelines","authors":"Lisa Elzi, Edoardo Villa, Nicola Patocchi","doi":"10.4081/jlimnol.2022.2143","DOIUrl":"https://doi.org/10.4081/jlimnol.2022.2143","url":null,"abstract":"The present study investigates the impact of water level regulation on the growth of common reed (Phragmites australis), a globally widespread helophytic plant. The investigation has been carried out in the Bolle di Magadino (municipalities of Locarno, Gambarogno, Gordola and Tenero; Ticino, Switzerland), a lacustrine-riparian nature reserve in the context of the Lake Maggiore (that stretches between Italy and Switzerland). This is an oligotrophic, artificially regulated lake. Our initial hypothesis was that variation in water table regulation is the most influential factor for explaining observed local reed dieback. To test this, culm height of P. australis was measured at each significant change in lake water level (water table height increase greater than 20 cm), or monthly in the case of a relatively constant lake level. The study took place between 2020 and 2022, monitoring 14 plots of 400 m2, placed at three different relative elevation classes with respect to the level of the lake (5 plots at low elevation, <193.475 m; 7 plots at intermediate elevation, 193.476-193.700 m; 2 plots at high elevation, >193.701 m). The results showed that P. australis growth is significantly influenced by the lake water level and thus the relative elevation of the stands, with lower lake levels leading to better growth, especially during the early phases of the growing season. On the other hand, prolonged flooding of shoots significantly impaired common reed growth. The study identifies two relevant relative elevation thresholds for winter mowing, a management practice that enhances reedbeds health. Mowing below 193.20 m elevation is considered risky, as no healthy reedbeds have been observed below this threshold. Mowing below an elevation of 193.50 m was defined as possibly risky, due to observed dieback in some areas as well as healthy reedbeds in other locations at the same or lower elevations. The research also discussed the potential impact of future changes in water level regulation, including the planned change in the spring regulation threshold (+1.50 m above the hydrometric zero in Sesto Calende). This is expected to result in a further rearrangement in lacustrine vegetation, with the growth optimum for P. australis becoming higher and an increase in clumping habit. In conclusion, this study provides valuable insights into the impact of water level regulation on the growth of P. australis in the Bolle di Magadino nature reserve. The research highlights the need for careful management of water level regulation to preserve the reedbed ecosystem and identifies relevant elevation thresholds for winter mowing to mitigate the risks of reed dieback. The findings can inform future management strategies for the Bolle di Magadino reserve and other similar ecosystems facing the challenges of artificial regulation of water levels.","PeriodicalId":50164,"journal":{"name":"Journal of Limnology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139278465","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}