Limnologica最新文献

{"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}

{"title":"Lability of sedimentary organic nitrogen estimated from amino acids in a reservoir on land reclaimed from Isahaya Bay, Kyushu, Japan","authors":"Hiroyuki Takasu ,&nbsp;Tomoya Era ,&nbsp;Kotaro Miyahara ,&nbsp;Maiko Ito","doi":"10.1016/j.limno.2024.126174","DOIUrl":"10.1016/j.limno.2024.126174","url":null,"abstract":"<div><p>In 1997, the inner part of Isahaya Bay on the west coast of the Ariake Sea was separated from the sea by dikes, leading to the formation of a freshwater reservoir. Since the Isahaya Reclamation Project began in the 1990s, red tides have become more common in the bay. Studies suggested that a non-negligible amount of NH₄⁺ was regenerated from organic matter decomposition in the turbid water drained from the reservoir into the bay, and this drainage water might be an important source of NH₄⁺ for red tides in the bay. Although labile organic matter in the turbid water might also originate from resuspended sediments in the reservoir induced by the drainage process, the potential for the resuspended sedimentary organic matter to serve as an NH₄⁺ source has never been evaluated. In this study, we found that sediments near the drainage gates on the dike in the reservoir contained high levels of amino acids and NH₄⁺. In addition, the NH₄⁺ concentrations were positively correlated with amino acids concentrations. This result can be explained by increasing NH₄⁺ production according to labile organic nitrogen accumulation in the sediments near the dike. The result of our study suggests that the sediment resuspension near the dike induced by drainage might be a source of bioavailable nitrogen for Isahaya Bay.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"106 ","pages":"Article 126174"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141143439","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":"Quantification of large-spatial scale and in-stream factors affecting the structure of benthic macroinvertebrate communities in mountain streams","authors":"Francesca Vallefuoco ,&nbsp;Magdalena Vanek ,&nbsp;Roberta Bottarin ,&nbsp;Alberto Scotti","doi":"10.1016/j.limno.2024.126172","DOIUrl":"10.1016/j.limno.2024.126172","url":null,"abstract":"<div><p>Habitat diversity plays a crucial role in shaping the structure and distribution of benthic macroinvertebrate communities. However, few studies have investigated the concurrent effects of such drivers operating at different spatial scales in mountain streams. Here, we assessed which environmental factors at different spatial scales, related to stream/river type and substrate, influence the diversity of benthic macroinvertebrate assemblages in mountain streams and rivers. Within the framework of the aquatic investigations of the Biodiversity Monitoring South Tyrol (BMS) – a newly-established, regional-based, long-term biodiversity monitoring program – benthic macroinvertebrates and a set of environmental factors describing water quality, stream/river hydromorphology and in-stream habitat characteristics were collected and analysed. The variation in total density, taxonomic richness, Shannon evenness and % Ephemeroptera–Plecoptera–Trichoptera taxa of stream benthic macroinvertebrates was assessed at multi-scale habitat levels, in 48 sampling sites across the mountainous region of the Autonomous Province of Bolzano/Bozen (Italy). The effects of stream/river type, substrates and different environmental factors on community composition of benthic macroinvertebrates were quantified, using a stepfoward Redundancy Analysis (RDA) and generalized additive models (GAMs). In addition, we performed an Indicator Value analysis to detect taxa that were significantly associated with a specific substrate and/or stream/river type. Overall, we observed significant differences in benthic biological metrics among both stream/river and substrate types. We also found at least one indicator taxa for each stream/river type, with environmental factors acting at reach and large-spatial scale – temperature, stream channel stability, elevation – being the key drivers in shaping macroinvertebrate distribution patterns in the analysed mountain rivers. While significant differences in macroinvertebrate community structures were found among substrates, the influence of stream/river type conditions was particularly evident. Apart from ranking environmental variables worth including in a long-term aquatic biodiversity monitoring program in mountain areas, our study provides a baseline for practical applications. For instance, depending on the desired outcome of habitat heterogeneity restoration, it can suggest the optimal scale (landscape vs. reach vs. patch) for prioritizing in-field interventions.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"106 ","pages":"Article 126172"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951124000252/pdfft?md5=356451a68d91ed939df9f0509f2ce260&pid=1-s2.0-S0075951124000252-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141028681","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":"Corrigendum to ‘Physico-chemical characterisation of protected lake habitats: A matter of dystrophy’ [Limnologica103, November 2023, 126123]","authors":"Giovanni Cappelli ,&nbsp;Heather T. Lally ,&nbsp;Martin P. Gammell ,&nbsp;Emma Gray ,&nbsp;Cilian M. Roden","doi":"10.1016/j.limno.2024.126161","DOIUrl":"10.1016/j.limno.2024.126161","url":null,"abstract":"","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"106 ","pages":"Article 126161"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0075951124000148/pdfft?md5=19e20f3f387cbc84f3e90dddd23846fa&pid=1-s2.0-S0075951124000148-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140404341","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":"Bias in the shoreline development index: Ecological implications illustrated with an analysis of littoral-pelagic habitat coupling","authors":"D. Seekell ,&nbsp;B.B. Cael","doi":"10.1016/j.limno.2024.126173","DOIUrl":"10.1016/j.limno.2024.126173","url":null,"abstract":"<div><p>We reexamined the relationship between the shoreline development index and metrics of habitat coupling using a bias-corrected variant of the shoreline development index. Our findings suggest that previously reported correlations may be artifacts of scale-dependent bias in shoreline development index measurements. The results highlight the need for careful measurement when seeking to understand links between lake morphology and ecological processes.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":"106 ","pages":"Article 126173"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141140327","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}