Limnologica最新文献

{"title":"Microplastic pollutants in sediments from a water supply reservoir: Spatial heterogeneity in abundance, characteristics and pollution evaluation","authors":"","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":null,"pages":null},"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":"","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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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":null,"pages":null},"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}

{"title":"Influence of seasonal hydrological regimes on benthic macroinvertebrates in two the Brazilian biodiversity hotspots","authors":"Ana Cláudia Garcia Barboza ,&nbsp;Victor Tagliacollo ,&nbsp;Giuliano Buzá Jacobucci","doi":"10.1016/j.limno.2024.126170","DOIUrl":"https://doi.org/10.1016/j.limno.2024.126170","url":null,"abstract":"<div><p>Global warming has changed climate patterns worldwide causing an increase of extreme weather conditions that have altered annual seasonal hydrological regimes. These extreme climate-driven shifts modify habitat availability and can influence freshwater communities in disruptive ways. Our study investigates how changes in annual seasonal hydrological regimes affect the community structure and the Functional Feeding Groups (FFG) of benthic macroinvertebrates in two Brazilian biodiversity hotspots, the Brazilian Tropical Savannas (a.k.a., Cerrado) and Atlantic Forest biomes. We investigate whether annual variation in precipitation between biomes influence composition, richness, and abundance of benthic macroinvertebrates and their proportions of FFG. We demonstrate that differences in annual precipitation rates affect the composition and abundance, but not richness of benthic macroinvertebrates. Changes in community structure are related to changes in annual precipitation, which modify stream variables. Our findings suggest that annual seasonal changes in hydrological precipitation modify benthic macroinvertebrate communities, especially in Cerrado, where dry seasons are more pronounced. Therefore, annual changes in precipitation rates may disrupt the benthic macroinvertebrate communities in tropical savannas, potentially leading to biodiversity loss.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140646871","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":"HPLC validation as a management tool in artificial water storage ponds","authors":"Alfredo Llorente ,&nbsp;Henar Fraile ,&nbsp;Begoña Gartzia de Bikuña ,&nbsp;Sergio Seoane","doi":"10.1016/j.limno.2024.126160","DOIUrl":"10.1016/j.limno.2024.126160","url":null,"abstract":"<div><p>Pigment analysis through high-performance liquid chromatography (HPLC) offers a faster and more replicable study of the phytoplankton community structure than traditional taxonomy, but its application to small-sized freshwater ecosystems is infrequent. We carried out a taxonomy-based validation for the application of HPLC to the management of two artificial water storage ponds. We also investigated the error and variability sources that affected the relationships between calculated biovolumes of phytoplankton groups and associated pigment concentrations. For both qualitative and quantitative approaches, agreement was obtained between techniques that consistently identified biomass peaks and structural trophic differences between the ponds. Considering the most relevant pigment to biovolume ratios for total biomass, and partial biomass proxies of green algae and fucoxanthin containing algae, a decreasing tendency was obtained as total and partial biomass increased in all the studied models. Bidirectional variability affecting these relationships scaled under high biomass conditions and suggested a better suitability of HPLC application under oligotrophic conditions, which is in line with previous studies. Additionally, pigment data was able to identify mean stored volume as the main environmental factor that drove trophic differences between the ponds. We conclude that HPLC is accurate not just for monitoring purposes, but to carry out ecosystem-level assessments in artificial ponds. Therefore, we endorse the use of HPLC as part of the monitoring networks in small-sized freshwater ecosystems.</p></div>","PeriodicalId":51110,"journal":{"name":"Limnologica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140035917","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}