Aquatic Sciences最新文献

{"title":"Contextualizing microplastic pollution in different river habitats through rapid habitat assessment in South Africa","authors":"Heinrich Theodor Jacob Dahms,&nbsp;Richard Greenfield","doi":"10.1007/s00027-025-01166-2","DOIUrl":"10.1007/s00027-025-01166-2","url":null,"abstract":"<div><p>There has been a notable increase in research into microplastics in rivers over the last decade. However, no clear or concise standardized monitoring method exists for the sampling of microplastics in rivers. Many guidelines exist for the sampling and analysis of microplastics from rivers, but researchers continue to use methods and tools that may contaminate samples, such as plankton nets, or collect and filter bulk water samples with differing volumes and numbers of replicates. This can result in the same river system being shown to have notably varying levels of microplastics between sites. The aim of this study was to determine microplastic abundances in water and sediment, together with a critical evaluation of the sampling sites, to ascertain which environmental factors impacted microplastic distribution. This was achieved by applying the rapid habitat assessment method and simultaneously sampling microplastics. The results indicated that factors such as water velocity, physical obstructions to water flow and, most importantly, discharge, can change the context of a site with respect to its microplastic content, which can impact niche-specific organisms. The results were used to develop a new measurement unit, the microplastic discharge unit. The MDU provides a contextualized representation of the microplastics moving through a river, and can be used as an indicator of microplastic pollution at a site and its impact on biota. The results will be used further to produce a guide for the accurate sampling of microplastics in rivers.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-025-01166-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Spatial and temporal taxonomic and functional beta diversity of macroinvertebrate assemblages along a tropical dammed river","authors":"Diego M. P. Castro,&nbsp;Pedro H. M. do Amaral,&nbsp;Eduardo van den Berg,&nbsp;Robert M. Hughes,&nbsp;Marcos Callisto","doi":"10.1007/s00027-025-01165-3","DOIUrl":"10.1007/s00027-025-01165-3","url":null,"abstract":"<div><p>Tropical freshwater ecosystems are essential for supporting biodiversity and providing crucial ecosystem services. However, these ecosystems face increasing threats from human activities, including the construction of hydropower dams. We investigated how the spatial and temporal taxonomic and functional β-diversity of aquatic macroinvertebrate assemblages varied above and below the Pandeiros River Dam, which is the first dam planned for decommissioning in South America. Integrating spatial and temporal perspectives is essential for understanding ecological community dynamics. We evaluated macroinvertebrate assemblages at eight sites over a period of 6 years, spanning five rainy and dry seasons. Our results revealed that turnover was the predominant component of taxonomic β-diversity spatially and temporally, whereas nestedness exerted a substantial role in shaping functional β-diversity. In addition, we observed higher values of taxonomic temporal β-diversity (TBI) compared with functional TBI. Finally, β-diversity decreased temporally. This study provides: (1) valuable knowledge regarding the spatial and temporal dynamics of the dammed Pandeiros River macroinvertebrate assemblages, as well as those of similar run-of-river dam/reservoir systems; (2) a foundation for the biological effects in case the dam is decommissioned; and (3) increased understanding of temporal assemblage dynamics. By shedding light on the spatial and temporal dynamics in dammed ecosystems, our research serves as a foundation for future monitoring and conservation efforts in tropical freshwater rivers, including how they may respond to dam breaching or removal.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Urban land use homogenizes fish assemblages across mesohabitats in headwater streams","authors":"Leonardo A. Pessoa,&nbsp;Matheus T. Baumgartner,&nbsp;Augusto Frota,&nbsp;Thiago D. Garcia,&nbsp;Marcelo P. S. Júnior,&nbsp;Luiz G. A. Pessoa,&nbsp;Erivelto Goulart","doi":"10.1007/s00027-025-01162-6","DOIUrl":"10.1007/s00027-025-01162-6","url":null,"abstract":"<div><p>Anthropogenic land use profoundly affects stream environmental conditions and fish assemblages. However, significant knowledge gaps remain regarding how land use influences fish species composition across different mesohabitats. To address this, we sampled riffles, runs, and pools in rural and urban streams, analyzing how land-use types shape environmental conditions, species composition, and the distribution of fish body shapes across mesohabitats. We hypothesized that urban streams would exhibit degraded environmental conditions, reduced fish diversity, and homogenized species composition and body shape distribution across mesohabitats. Our findings confirmed that urban streams had more degraded conditions and lower fish diversity. Additionally, fish body shape distribution and species composition were homogenized across mesohabitats in urban streams. These results highlight the need for stream management and restoration strategies, emphasizing that diverse mesohabitats alone may not counteract the homogenizing effects of urbanization on fish assemblages.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Correction: Ecological quality of snowmaking reservoirs in the Alps and management perspectives","authors":"Benjamin Gerfand,&nbsp;Florent Arthaud,&nbsp;André Evette,&nbsp;Baptiste Testi,&nbsp;Laurent Peyras,&nbsp;Stéphanie Gaucherand","doi":"10.1007/s00027-024-01159-7","DOIUrl":"10.1007/s00027-024-01159-7","url":null,"abstract":"","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Benthic communities of saline rivers in the arid zone of south Russia: saliny tolerance, production, trophic conditions","authors":"Larisa V. Golovatyuk,&nbsp;Tatyana D. Zinchenko,&nbsp;Timur A. Kanapatskiy,&nbsp;Marina V. Umanskaya,&nbsp;Mikhail Yu. Gorbunov,&nbsp;Olga G. Gorokhova,&nbsp;Nikolay V. Lobus,&nbsp;Vladimir A. Gusakov","doi":"10.1007/s00027-025-01160-8","DOIUrl":"10.1007/s00027-025-01160-8","url":null,"abstract":"<div><p>The article presents the results of long-term studies (2008–2014 and 2017–2019, 2023) of macrozoobenthos communities and the trophic conditions for their development in six saline rivers of the Lake Elton basin, characterized by important stopovers sites of migrating waterfowl in Europe. The aim of the work was to study the salinity tolerance of macrozoobenthos species, identify their quantitative indicators in a wide salinity gradient and establish the long-term production dynamics of benthic invertebrates. During the studied period, within a wide range of river salinity, from 4 g l⁻¹ to 114 g l⁻¹, a decrease in macrozoobenthos species richness was established, from 87 species in mesohaline rivers to 30 species in polyhaline rivers and to 10 species in a hyperhaline river. The abundance, biomass and production of macrozoobenthos varied widely, mainly determined by the development cycles of common salinity-tolerant dipterans species. The production of macrozoobenthos in mesohaline and polyhaline rivers was comparable or higher than observed in brackish water lagoons in Europe. With increasing water salinity, a decrease in the average long-term macrozoobenthos production values during the summer period was observed. The production of macrozoobenthos increased from the middle reaches of the rivers towards their mouth reaches, which is explained by an increase in the production of hydrobionts of lower trophic levels. At the same time, an analysis of the variability of macrozoobenthos production in rivers with different salinity levels did not reveal a pronounced trend in the long-term series of observations.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Spatial and seasonal fish assemblage dynamics in a heavily urbanized estuary affected by interbasin water transference (Northeast, Brazil)","authors":"Leonardo Mesquita Pinto,&nbsp;Ronaldo César Gurgel-Lourenço,&nbsp;Luisa Marcellah de Jesus Santos Silva,&nbsp;Danielle Sequeira Garcez,&nbsp;Jorge Iván Sánchez-Botero","doi":"10.1007/s00027-024-01156-w","DOIUrl":"10.1007/s00027-024-01156-w","url":null,"abstract":"<div><p>Estuarine ecosystems exhibit substantial spatiotemporal variation in their environmental conditions, resulting in a dynamic fish assemblage. However, anthropogenic alterations in hydrological flow and nutrient concentrations can potentially modify the spatial and temporal structuring of the fish community. This study aimed to elucidate how the characteristics of fish assemblages vary in space and time in an estuary (Cocó River, Ceará State, Northeast Brazil) that experiences significant impacts stemming from untreated domestic effluent discharge and water transfer from other hydrographic basins. The fish assemblage exhibited low total species richness alongside a high number and biomass of freshwater species, including non-natives. A stable spatial structure across seasons was discerned, implying diminished connectivity between estuarine zones. Changes in the trophic structure of the ecosystem could be inferred from variations in trophic composition among different zones. The findings presented herein demonstrate the alterations that interbasin water transfer may induce in estuarine fish assemblages, with potential ramifications for ecosystem functioning.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142962967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Population genetics of the hawksbill sea turtle (Eretmochelys imbricata; Linnaeus, 1766) in the Persian Gulf: structure and historical demography","authors":"Zohreh Nasiri,&nbsp;Mehdi Gholamalifard,&nbsp;Maryam Mohammadi,&nbsp;Seyed Ali Jebeli,&nbsp;Seyyed Mohammad Hashem Dakhteh,&nbsp;Mohammad Ghavasi,&nbsp;Mohammad Amin Tollab,&nbsp;Seyed Mahmoud Ghasempouri","doi":"10.1007/s00027-024-01158-8","DOIUrl":"10.1007/s00027-024-01158-8","url":null,"abstract":"<div><p>This study focuses on the population genetics and historical demography of the hawksbill sea turtle (<i>Eretmochelys imbricata</i>) in the Persian Gulf. We selected eight distinct locations along its nesting habitat, covering a 750-km stretch of coastline, and collected 127 maternal DNA samples in one season using non-invasive methods. The samples were analyzed using 15 microsatellite loci, revealing distinctive genetic structures on islands and beaches, even when between locations as little as 50 km apart. The highest genetic diversity was observed for Qeshm Island, while lower genetic diversity was observed for Shidvar and Kharkoo islands and for Nayband Bay, possibly due to limited nesting habitat availability and disturbances related to tourism. The fixation index (<i>F</i>_ST) and gene flow parameter (<i>N</i>_<i>m</i>) values also identified population differentiation, with moderate to high differentiation observed among most populations. We also used population structure analysis, migration analysis, and population history reconstruction to identify multiple genetic clusters, and obtained support for a scenario of simultaneous dispersal in the Persian Gulf when the region became fully inundated with water approximately 10,000 years ago. Although the first introduction of hawksbill sea turtles into the Persian Gulf occurred from the Oman Sea through the Strait of Hormuz, they were distributed in all current habitats within a short time. The study emphasizes the importance of each coastal and island region in the Persian Gulf as a distinct genetic reservoir for hawksbill turtles. It also underscores the significance of conservation efforts to protect the genetic diversity and resilience of these endangered marine turtles, especially on nearby islands.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Lignocellulolytic and plastolytic potential of groundwater and sediment bacteria from the serpentinization-driven hyperalkaline springs","authors":"Vladimir Šaraba,&nbsp;Tatjana Trtić-Petrović,&nbsp;Violeta Gajić,&nbsp;Predrag Dabić,&nbsp;Tanja Petrović Pantić,&nbsp;Ivana Jovanić,&nbsp;Jasmina Nikodinovic-Runic,&nbsp;Milica Ciric","doi":"10.1007/s00027-024-01142-2","DOIUrl":"10.1007/s00027-024-01142-2","url":null,"abstract":"<div><p>Four serpentinization-driven hyperalkaline springs (HAS) in the Jurassic ophiolites of western Serbia, with pH values between 11.1 and 11.7, were selected to assess the lignocellulose- and plastic-degrading potential of cultivable bacteria found in both the groundwaters and sediments of the zone of emergence of the investigated occurrences. Also, the physico-chemical properties of the groundwaters and petrological and mineralogical composition of sediments were examined. The HAS investigated are cold (temperature: 14.7–19.4 °C) and low in minerals (total dissolved solids: 104.1–450.4 mg/L) and belong to the Ca²⁺–OH⁻ and Ca²⁺, Na⁺–OH⁻ genetic type. Ca²⁺ was the most abundant cation (39.7–132.7 mg/L), followed by Na⁺ (2.0–82.5 mg/L) in three and Mg (6.6 mg/L) in one HAS, respectively. OH⁻ was the most abundant anion (24.6–123.2 mg/L), followed by CO₃²⁻ (18.0–36.2 mg/L) and Cl⁻ (12.4–71.0 mg/L) in all tested groundwaters. Binocular examination revealed that gravelly spring sediments consist predominantly of peridotite, serpentinite, carbonate and quartzite clasts, while the powder X-ray diffraction experiments identified calcite and lizardite as the main mineral phases in the silt fraction. In total, 210 groundwater and sediment isolates were screened on lignocellulose and plastic substrates, and 33.8% of all screened HAS isolates (9.1% from groundwaters and 38.4% from sediments) degraded carboxymethyl cellulose. Selected bacterial isolates were identified by partial 16S ribosomal DNA sequencing to belong to the genera <i>Bacillus</i>, <i>Peribacillus</i>, <i>Paenibacillus</i> and <i>Lysinibacillus</i>; these could have potential applications in various commercial sectors requiring cellulose degradation. All identified isolates demonstrated growth on the plastic substrates Impranil® DLN-SD (SD) and Impranil® DL 2077 (DL), while three isolates, belonging to genera <i>Bacillus</i>, <i>Peribacillus</i> and <i>Paenibacillus</i>, respectively, demonstrated growth on all four tested plastic substrates (SD, DL, polycaprolactone diol and bis(2-hydroxyethyl) terephthalate). These isolates should be further explored as potential candidates for bioremediation treatments of plastic-polluted groundwaters and sediments.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Benthic-pelagic equilibrium of carbon transfer in high-altitude lakes: featuring the role of lake’s characteristics and seasonal variation","authors":"Laurent Cavalli,&nbsp;Flavia Dory,&nbsp;Benjamin Oursel,&nbsp;Eric Meineri,&nbsp;Céline Bertrand,&nbsp;Coralie Jacquemin,&nbsp;Philippe Moullec,&nbsp;Evelyne Franquet","doi":"10.1007/s00027-024-01154-y","DOIUrl":"10.1007/s00027-024-01154-y","url":null,"abstract":"<div><p>Carbon pathways in freshwater ecosystems are particularly complex because of the multiple origins, forms, and transformations of carbon by aquatic organisms. In high-altitude lakes, located above the treeline, most of the carbon pool is of indigenous origin. However, little is known about the influence of lake and watershed characteristics on carbon transfer pathways and their variability over an annual cycle. We analyzed simultaneously carbon stable isotopic composition (δ¹³C) and C/N ratio of organic matter from pelagic (POM, zooplankton) and benthic components (benthic invertebrates, sediments) in eight high-altitude lakes and hypothesized that the origin of the carbon used and the composition of organic matter in the pelagic and benthic compartments vary according to the lake’s characteristics. The results showed that most of the organic matter composing the sediments is of autochthonous origin, regardless of the lake’s characteristics. We observed a common tendency of seasonal shift in the source of carbon used, from a C–CO₂ respired or a C–CH₄-derived in early summer to a C–CO₂ dissolved in late summer. However, the origin of the carbon used and the contribution of pelagic and benthic primary producers to the carbon transfers varied according to the lakes’ depth, lithology, and food web structure. These findings highlight that the complexity of high-altitude lakes and how the balance between benthic and pelagic food webs will be important in future ecological trajectory predictions.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Conventional environmental assessments are inadequate for predicting and mitigating impacts of dams on migratory fish in Brazil: an integrative assessment approach for the Neotropics","authors":"J. M. Lopes,&nbsp;A. Peressin,&nbsp;F. R. de Andrade,&nbsp;M. F. Moreira,&nbsp;S. Ludwig,&nbsp;J. S. M. Pimentel,&nbsp;L. Wouters,&nbsp;I. G. Prado,&nbsp;F. M. Suzuki,&nbsp;C. B. M. Alves,&nbsp;P. S. Pompeu","doi":"10.1007/s00027-024-01157-9","DOIUrl":"10.1007/s00027-024-01157-9","url":null,"abstract":"<div><p>The escalating pace of dam construction in Brazil poses a significant threat to migratory fish. This study uses data from previous research to predict the impacts of new dams on the life cycle of the migratory fish <i>Prochilodus costatus</i>. The species was studied for five reproductive seasons in a 500-km free-flowing stretch of the São Francisco River, where the construction of six hydroelectric dams is now planned. These studies investigated migratory periods, routes, critical habitats, and the genetic structure of the <i>P. costatus</i> population, assessing potential impacts of the planned dams and exploring various mitigation strategies. The assessment shows that maintaining this river stretch free of dams is crucial for the species’ survival. The comparison of this in-depth analysis with information generated by conventional environmental impact assessments (EIAs) conducted in Brazil revealed that conventional EIAs often fail to predict the actual impacts of dam construction as they rely on inadequate collection and analysis methods. Therefore, the proposed mitigating measures prove inefficient for migratory fish. Our comparison highlights the importance of obtaining essential information about the ecological requirements of migratory fish and integrating it with the characteristics of newly planned dams before determining their environmental feasibility. We thus propose an integrative approach to assess the impact of dams on Neotropical migratory fish (IANMF), aimed at providing researchers and environmental agencies with higher quality information on migratory fish ecology and the potential impacts of future dams on their life cycles.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}