Limnologica最新文献

{"title":"On a new species of ostracod from the Brazilian Amazon and its potential for experimental studies in laboratory culture","authors":"Diego F. Gomes ,&nbsp;Julia S. Pereira ,&nbsp;Ricardo L. Pinto ,&nbsp;Raquel Ap. Moreira ,&nbsp;Odete Rocha","doi":"10.1016/j.limno.2024.126197","DOIUrl":"10.1016/j.limno.2024.126197","url":null,"abstract":"<div><p>Ostracods are taxonomically and ecologically diverse small crustaceans that have recently gained prominence in laboratory studies and environmental impact assessment. In this context, the present study aims to assess the applicability of a new freshwater ostracod for experimental studies in the laboratory, and we provide the formal description of <em>Strandesia rondoniensis</em> <strong>n. sp</strong>. The original specimens for setting the laboratory cultures originated from the Natural Park of Porto Velho, in the Amazon region (Rondônia State, Brazil). The growth and reproductive rates of eleven adult individuals of <em>S. rondoniensis</em> <strong>n. sp</strong>. were analyzed. The results showed a high morphological resemblance with <em>Neostrandesia striata</em> and <em>Bradleytriebella lineata</em>, even though the new species belongs to <em>Strandesia</em>, indicating evolutionary convergence. The life cycle analysis showed that individuals of <em>S. rondoniensis</em> <strong>n. sp</strong>. have fast growth and high reproductive rates, which favour their use in laboratory studies. Besides contributing to the knowledge about ostracods in the Amazon region, which has been poorly studied, the life cycle experiment characterizations provided here should promote the use of this new species as a model organism for laboratory studies.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"108 ","pages":"Article 126197"},"PeriodicalIF":2.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087155","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":"Determining diagnostic characteristics of the nonmarine Ostracoda (Crustacea) and their habitat selection with unique functional traits in the Kastamonu province (Türkiye)","authors":"Okan Külköylüoğlu ,&nbsp;Mehmet Yavuzatmaca ,&nbsp;Cemal Tunoğlu ,&nbsp;Bilge Tunçkol","doi":"10.1016/j.limno.2024.126199","DOIUrl":"10.1016/j.limno.2024.126199","url":null,"abstract":"<div><p>Nonmarine ostracods are widely distributed in a variety of aquatic habitats, from mountain lakes to underground waters, where each species tends to show species-specific habitat preferences with unique functional traits to increase their survival chances. To understand the patterns of such a relationship between habitat preferences and functional traits of the species, 101 different aquatic sites in the Kastamonu province (Türkiye) were randomly sampled during August 2023. A total of 39 ostracods (20 species, 19 unnamed taxa) were encountered from 49 sites. Seventeen species are new reports for the province. Among them, six species are the most common species with cosmopolitan (or cosmoecious) characteristics. The contribution of these species to the diversity of alpha species (p &lt; 0.05) was more than 90 %. The species with relatively high ecological tolerances generally unveiled low-optimum estimates. Canonical correspondence analysis explained 62.5 % of the correlation between environmental variables and species in which redox potential, electrical conductivity, calcium, and pH were found to be the most related variables to the species (p &lt; 0.05). <em>Fundiversity</em> analysis showed that the presence of swimming setae was correlated with high values of functional diversity, functional richness, and functional distribution of species among five elevation ranges. The results of the habitat selection index and the standardized selection index coincided with the functional traits of the most common species. The species characterized by their habitat selection can be considered as diagnostic species of those specific habitats. Among them, <em>Neglecandona neglecta,</em> reported primarily from dams, springs, and troughs, is considered a typical diagnostic species of these habitats, while <em>Cypridopsis vidua</em> found in lakes and dams can be used as an indicator species for these types of lentic habitats. Similarly, three species (<em>Heterocypris incongruens</em>, <em>Ilyocypris bradyi</em>, <em>Psychrodromus olivaceus</em>) can play a critical role as diagnostic species in troughs but reporting them from different habitats such as ditches and rivers / lakes (<em>I. bradyi</em>) and dams (<em>P. olivaceus</em> and <em>H. salina</em>) indicated their wide range of habitat preferences. Hence, the results suggest that the occurrence of diagnostic species seems to correspond to certain habitat types and their functional traits.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"108 ","pages":"Article 126199"},"PeriodicalIF":2.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087156","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":"Evidence that siltation aggravated by climate change can shift the dominance of two globally invasive freshwater macrophytes","authors":"Márcio José Silveira ,&nbsp;Vanessa de Carvalho Harthman","doi":"10.1016/j.limno.2024.126198","DOIUrl":"10.1016/j.limno.2024.126198","url":null,"abstract":"<div><p>Siltation has been aggravated by climate changes due more frequent and intense rain events, resulting in greater amounts of sediment in water bodies. These changes have impacted drastically submerged macrophytes growth by light limitations. Despite biological invasions are among the major threats to freshwater biodiversity and invasive submerged aquatic plants also has been impacted by these changes. The main aim of this study was to investigate through an experimental study as two globally invasive freshwater macrophytes, <em>Hydrilla verticillata</em> and <em>Egeria densa,</em> respond to the changes in water transparency caused by siltation. We performed a factorial experiment to test the effect of turbidity increase caused by siltation on growth of these two species. For this, we included sand or mud sediment in containers to obtain without and with siltation treatments. Then both species were planted at the two treatments and grown for 30 days. The main results of our study were that there was a shift in the dominance at the performance of some biological traits between the species, where <em>H. verticillata</em> showed better development of these biological traits than <em>E. densa</em> at treatment with siltation, and the reverse was also true, where <em>E. densa</em> had better performance in without siltation treatment. In summary, our results demonstrated that if the increase in water siltation continues at the current rate, a greater performance of <em>H. verticillata</em> can also be expected and, consequently, the impacts on aquatic biodiversity will also increased. These results may be helpful in predicting the effects of siltation on the development of two globally invasive freshwater submerged macrophytes. Moreover, could increase the ability of managers environmental to predict the future development of ecosystems in relation to invasions by non-native species.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"108 ","pages":"Article 126198"},"PeriodicalIF":2.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142087154","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":"Rotifer functionality as a potentially useful indicator of lake browning","authors":"Satu Estlander ,&nbsp;Leena Nurminen ,&nbsp;Salla Rajala ,&nbsp;Mikko Olin ,&nbsp;Jukka Horppila","doi":"10.1016/j.limno.2024.126194","DOIUrl":"10.1016/j.limno.2024.126194","url":null,"abstract":"<div><p>Lake browning is considered a severe water quality problem in lake ecosystems, but it has received considerably less attention in water protection than eutrophication. Current metrics used in lake surveillance monitoring programmes, including the European Union’s Water Framework Directive, do not reflect browning sufficiently. The aims of the study were to explore the potential role of the functionality of rotifers as browning indicators and to improve understanding of the environmental parameters driving the functionality and diversity of rotifers. Seasonal data on rotifer communities and water quality from seven lakes with differing water colour and trophic conditions were analysed. The feeding guilds of rotifers enabled differentiation between lakes in terms of their ecological conditions, and, in particular, eutrophic and brown-water lakes were clearly distinguished from other lakes. The guild ratio of rotifers was positively affected by water colour, but inversely related to total phosphorus concentration. Our results suggest that zooplankton functionality provides a potential tool to assess ecosystem dynamics, particularly when assessing lake browning. Thus, our results suggest that application of the guild ratio of rotifers is a promising method to estimate the general browning status of lakes and may complement the metrics used in Water Framework Directive.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"108 ","pages":"Article 126194"},"PeriodicalIF":2.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951124000471/pdfft?md5=c0bad89d637a5bcdff0a5bc92e70fec5&pid=1-s2.0-S0075951124000471-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011241","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":"Population status and host fishes of the freshwater pearl mussel in the eastern part of the Onega Peninsula, Northern European Russia","authors":"Ekaterina S. Konopleva ,&nbsp;Ilya V. Vikhrev ,&nbsp;Olesya A. Chelpanovskaya ,&nbsp;Gennady A. Dvoryankin ,&nbsp;Pavel A. Futoran ,&nbsp;Mikhail Yu. Gofarov ,&nbsp;Alexander V. Kondakov ,&nbsp;Ivan N. Bolotov","doi":"10.1016/j.limno.2024.126184","DOIUrl":"10.1016/j.limno.2024.126184","url":null,"abstract":"<div><p>Four populations of freshwater pearl mussel <em>Margaritifera margaritifera</em> were studied at lower sections of three river basins of the eastern part of the Onega Peninsula, Northern European Russia: the Bol’shaya Syarta, the Ust’-Yaren’ga and the Lopshen’ga (including Kamenny Stream). One of the populations from the Lopshen’ga River was discovered for the first time. Here we present preliminary data on the population status of <em>M. margaritifera</em>, its host fishes and glochidia infestation in the studied river basins. Living juvenile mussels and fishes infested by glochidia were recorded only in two waterbodies, i.e., the Bol’shaya Syarta and Ust’-Yaren’ga rivers. The pearl mussel population from the Bol’shaya Syarta River seems to represent the most prosperous among studied ones. The average density of visible mussels was small in the lower section of the river, but the proportion of young mussels was rather high (33.1 %) and intensity of glochidia infection reached 865 glochidia per fish. The highest average density was recorded in the pearl mussel population from the Kamenny Stream, Lopshen’ga River basin. However, only one juvenile mussel and none of host fishes infested by glochidia were recorded in this watercourse that may indicate the population aging and decrease of reproduction. Morphological analyses revealed significant differences between four studied populations of <em>M. margaritifera</em> towards the shell convexity index (SCI) and shell elongation index (SEI). In all studied basins, salmonid fishes were also infested by other parasites, mainly flatworms and their cysts. This factor may negatively impact the salmonid host fish populations that require monitoring of the current situation. The data obtained and future studies will allow to develop a system for protecting and monitoring of populations of a rare species such as the freshwater pearl mussel <em>M. margaritifera</em>.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"107 ","pages":"Article 126184"},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141630770","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":"Longitudinal distribution of fish fauna and characteristics of indicator species in the East Seto Inland Ecological Region within the Japanese Archipelago","authors":"Rei Itsukushima","doi":"10.1016/j.limno.2024.126187","DOIUrl":"10.1016/j.limno.2024.126187","url":null,"abstract":"<div><p>Understanding biota distribution patterns is essential for ecosystem conservation and restoration. In addition to biogeography, the distribution patterns of aquatic organisms that inhabit rivers vary longitudinally along river networks. Although longitudinal changes in distribution patterns in aquatic organisms along river networks have been studied in single river basins, it is crucial to understand these patterns at a regional ecological scale for broad-scale ecosystem conservation. This study aimed to elucidate the longitudinal distribution patterns of fish fauna and their correlation with environmental factors in several watersheds within the East Setouchi Ecological Region, renowned for its rich freshwater fish diversity in the Japanese archipelago. Data were obtained for 118 species across 10 watersheds and 85 sites, and the surveyed sites were classified into four longitudinal groups based on the similarity of the fish fauna. The lowest group comprised river estuaries, abundant in brackish-water fish, comprising primarily Gobiidae species. In lower watershed areas with low agricultural land and forest cover but high urbanization, all fish species selected as indicators were non-native. Upstream areas with a high percentage of agricultural land featured a mix of native Cyprinidae and non-native species such as <em>Micropterus salmoides</em> and <em>Rhodeus ocellatus ocellatus</em>. The most upstream groups, marked by significantly greater elevations and bed slopes, exclusively comprised native species as indicator species. Analyzing the longitudinal distribution patterns of fish fauna at multiple sites within the same ecological region enabled us to choose endemic fish species as indicators and identify important species for conservation. Additionally, the selection of sites characterized by significant urbanization and strong anthropogenic influences, along with the selection of non-native species as indicators, underscores the urgency of conserving native organisms in these areas, calling for continuous monitoring.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"107 ","pages":"Article 126187"},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951124000409/pdfft?md5=4c8ecbd4e51b1a26138876ac77128c25&pid=1-s2.0-S0075951124000409-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141939243","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":"Microplastic pollutants in sediments from a water supply reservoir: Spatial heterogeneity in abundance, characteristics and pollution evaluation","authors":"Yunzhao Liu ,&nbsp;Le Liang ,&nbsp;Jiajun Wu ,&nbsp;Xianfu Zhao ,&nbsp;Jing Li ,&nbsp;Ting Fang ,&nbsp;Yangyang Liang ,&nbsp;Zhongguan Jiang","doi":"10.1016/j.limno.2024.126186","DOIUrl":"10.1016/j.limno.2024.126186","url":null,"abstract":"<div><p>When assessing microplastics (MPs) in freshwater ecosystems, previous studies have primarily focused on natural rivers and lakes, with limited attention to urban water source areas. Sediments, recording the steady process of MPs accumulation during a long period of time, can act as an important sink for MPs. In this study, we investigated the distribution, characteristics and pollution evaluation of MP contaminants in sediments of a water supply reservoir of Hefei City (the Dafangying Reservoir). Meanwhile, the differences of MP concentrations in sediments in rural and urban areas were also compared. Our results detected five shapes, seven colors and six polymer types of MPs in sediments of the Dafangying Reservoir. Polystyrene, polyethylene and polypropylene were the most abundance types of MPs identified. The average MPs abundance of sediments in rural areas was 83.20 ± 32.99 n/100 g dry weight (d.w.), and 182.67 ± 72.21 n/100 g (d.w.) in urban areas. The total MP concentrations were significantly higher in sediments of urban sites than that in rural sites, which can be ascribed to more complex and diverse MP sources triggered by intensive anthropogenic activity in cities. Specifically, we also demonstrated significantly higher microbead abundance in urban sites, which may result from the widespread use of microbead in personal care products. Given the complexity and diversity of MPs in urban areas, we exhibited a relatively higher abundance of MPs in the Dafangying Reservoir than that in other rural larger reservoirs. According to the index of geoaccumulation, the sedimentary MPs were assessed as moderately polluted. Our study enriches valuable data on the distribution of MPs contaminants in water supply reservoir, and provides theoretical references for MPs control and management in reservoir ecosystems.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"107 ","pages":"Article 126186"},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847184","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":"Environmental, spatial, and temporal drivers of multiple facets of beta diversity from a zooplankton metacommunity in two tropical urbanized rivers","authors":"Natanael José Silva,&nbsp;Fernando Miranda Lansac-Tôha,&nbsp;Fábio Amodeo Lansac-Tôha","doi":"10.1016/j.limno.2024.126185","DOIUrl":"10.1016/j.limno.2024.126185","url":null,"abstract":"<div><p>Environmental, spatial, and temporal factors play an important role in beta diversity in metacommunities. Most studies are based only on species identity, and little is known about how these factors affect multiple facets of diversity. Here, we assessed the effect of local (chemical, physical, and hydrological), spatial, and temporal variables on taxonomic, functional, and phylogenetic beta diversity in a zooplankton metacommunity in two urban rivers. The partition of the beta diversity into its components - replacement and abundance difference - was performed using the Bray-Curtis index. Distance-based redundancy analysis and variation partitioning were used to assess the importance of predictors for the beta diversity. We found that beta diversity was high and mostly influenced by environmental factors and, to a lesser extent, by spatial and temporal factors in all facets. The abundance difference was the dominant component of beta diversity in all facets and was mainly explained by the environment and space, while replacement had a low explanation, in general, and was more related to temporal factors. These results reflect anthropic pressures in these environments and suggest that a multifaceted approach to beta diversity provides complementary information about the processes structuring the metacommunity and about conservation strategies of these impacted environments.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"107 ","pages":"Article 126185"},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141843223","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":"Development of a new primer tool for quantification and identification of geosmin-producing cyanobacteria in drinking water reservoirs","authors":"Brendan T. Higgins ,&nbsp;Morgan Thomas ,&nbsp;Peyton Goodling ,&nbsp;Alan E. Wilson","doi":"10.1016/j.limno.2024.126183","DOIUrl":"https://doi.org/10.1016/j.limno.2024.126183","url":null,"abstract":"<div><p>Elevated geosmin concentrations in drinking water reservoirs can lead to customer complaints and increased treatment costs for utilities. Use of molecular approaches, like qPCR and targeted amplicon sequencing, can help with prediction and preventive measures, but many of the primers targeting the geosmin synthase gene suffer from limited coverage of taxa or poor specificity. Here, a set of primers (CGeo1F/R) were developed that had high specificity for geosmin synthase in cyanobacteria without the use of probes. When tested on samples from three drinking water reservoirs with elevated geosmin levels, these primers amplified the geosmin synthase gene in seven cyanobacterial genera, including <em>Dolichospermum, Aphanizomenon, Cylindrospermum, Planktothrix, Nostoc, Coelosphaerium,</em> and <em>Tychonema</em>. These primers exhibited acceptable amplification efficiency (∼ 90 %) and a linear amplification range of 6 × 10¹–6 × 10⁵ copies per ml in lake water. Within the limited set of samples used to evaluate these primers, a good correlation was observed (r = 0.8) between abundance of geosmin synthase and geosmin concentration. When compared to some existing, well-utilized primers in the literature, these new primers had better specificity and amplification properties, and thus may prove valuable to other researchers.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"107 ","pages":"Article 126183"},"PeriodicalIF":1.7,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141429875","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":"Initial development of a benthic macroinvertebrate multimetric index for monitoring the ecological integrity of northern Mongolian streams","authors":"Oyunchuluun Yadamsuren ,&nbsp;Narangarvuu Dashdondog ,&nbsp;Tamir Puntsag ,&nbsp;Tamir Gantugs ,&nbsp;Yadamsuren Gerelchuluun ,&nbsp;John C. Morse","doi":"10.1016/j.limno.2024.126171","DOIUrl":"10.1016/j.limno.2024.126171","url":null,"abstract":"<div><p>The quality and quantity of Mongolia’s water resources are being degraded by ineffective water-management. There is no widely accepted biomonitoring system for Mongolia, only hydrological and chemical monitoring, with limited relevance for living organisms. Therefore, this study has aimed to develop a Mongolian-specific multimetric index and biocriteria applicable to the biological assessment of Mongolian streams. A total of 66 stream sites in northern Mongolia were selected representing different gradients of land use. In total, 30 candidate metrics representing the following four categories of ecological condition were used: diversity/richness, composition/abundance, trophic status, and tolerance/sensitivity. The resulting candidate metrics were evaluated using a stepwise procedure for metric variability, redundancy, sensitivity, and responsiveness to environmental gradients. According to the Mann-Whitney U test, 21 metrics showed statistically significant differences between the reference and impaired groups (P &lt; 0.05). A metric showed interquartile overlap and thirteen metrics were redundant based on Spearman’s correlation analysis (r &gt; 0.8). Finally, five metrics were retained and included in the multimetric index system and all clearly distinguished reference and impaired sites. Then the range of the multimetric index score (numerical value 0–1) was subdivided into five categories (reference/excellent ≥ 0.8, good &lt; 0.8 to ≥ 0.6, moderate &lt; 0.6 to ≥ 0.4, poor &lt; 0.4 to ≥ 0.2, severe &lt; 0.2) related to level of impairment. Thus, this multimetric index successfully distinguished reference from impaired conditions, demonstrating its applicability for northern Mongolian stream assessment. Hence, the Mongolian-specific Macroinvertebrate Multimetric Index (MMI-MON) can be used as a principal assessment tool for assessing waterways in northern Mongolia and possibly throughout the country, detecting future changes and providing valuable information for land-use management and conservation of aquatic ecosystems of Mongolia.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"106 ","pages":"Article 126171"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141045533","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}