Aquatic Sciences最新文献

{"title":"Fatty acid flux disparities between aquatic and terrestrial ecosystems in a shaded river can alter the nutritional content of consumer resources","authors":"Olesia N. Makhutova,&nbsp;Yulia O. Mashonskaya,&nbsp;Elena V. Borisova,&nbsp;Nadezhda I. Kislitsina,&nbsp;Svetlana P. Shulepina","doi":"10.1007/s00027-025-01164-4","DOIUrl":"10.1007/s00027-025-01164-4","url":null,"abstract":"<div><p>Boreal forests are rich in small rivers, whose primary productivity is limited by tree shading. The diet of benthivorous fish in such rivers is based on a mixture of autochthonous and allochthonous organic matter. Algae produce and aquatic invertebrates accumulate polyunsaturated fatty acids (PUFA) of the n-3 family (n-3 PUFA), including eicosapentaenoic acid, a long-chain PUFA. Terrestrial organisms are poor in these essential nutrients but are rich in n-6 PUFA. Here, we aimed to assess fluxes of biomass and n-3 and n-6 PUFA between aquatic and terrestrial ecosystems of the shaded Krutaya Kacha River. The production of benthic macroinvertebrates in the river was 11.7 mg dry weight (DW) m⁻² day⁻¹, while the export of aquatic insect biomass was 4.28 mg (DW) m⁻² day⁻¹. The import of invertebrate biomass into the river was 56.2 mg (DW) m⁻² day⁻¹, which was 1 order of magnitude higher than the export of aquatic insects and 5 times higher than the production of benthic macroinvertebrates. The import of n-3 PUFA and n-6 PUFA into the river via invertebrates was 0.550 and 0.909 mg (DW) m⁻² day⁻¹, respectively, while the export of these fatty acid groups from the river with emergent insects was lower by factors of 6.7 and 20.7, respectively. Thus, in such rivers, stream consumers feeding on aquatic and terrestrial resources receive food of biochemically differing quality: the amounts of food being equal, fish consuming terrestrial invertebrates receive less n-3 PUFA but more n-6 PUFA than fish consuming aquatic invertebrates. The predominance of allochthonous food towards the base of stream food webs can have cascading effects, which result in lower nutritional quality at higher trophic levels, as previously observed in fish within the Krutaya Kacha River.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184713","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":"Fish community structure in accordance with environmental signatures in a tropical river ecosystem in the Eastern Himalayan ecoregion","authors":"Shamyung O. Ongh,&nbsp;Asha Taterao Landge,&nbsp;Karankumar Ramteke,&nbsp;Simanku Borah,&nbsp;Jyotish Barman,&nbsp;Sahina Akter,&nbsp;Anil Kumar Yadav,&nbsp;Pritam Das,&nbsp;Sullip Kumar Majhi,&nbsp;Nabanita Chakraborty,&nbsp;Basanta Kumar Das","doi":"10.1007/s00027-025-01169-z","DOIUrl":"10.1007/s00027-025-01169-z","url":null,"abstract":"<div><p>Environmental characteristics significantly influence the distribution of fish communities in aquatic ecosystems. This study examined the relationship between fish community structure and ecological characteristics in the Dhansiri River, a tropical river within the Eastern Himalayan ecoregion. Sampling was conducted across three seasons (monsoon, premonsoon, and postmonsoon) at four stations representative of the whole river stretch. The highest number of species was recorded along the upper stretch S1 (54), followed by S2 (45), S3 (41), and S4 (37). Seasonally, the number of species peaked during monsoon (64), decreased in postmonsoon (59), and was lowest in premonsoon (54). The Shannon diversity index (<i>H</i>′) ranged from 3.327 to 3.750, with higher values upstream and gradually declining downstream. Species diversity was lowest at S4, likely owing to poor environmental conditions and high anthropogenic pressure. Cyprinids emerged as the most dominant fish group, with relative family abundance varying from 0% to 5.63%. Nonmetric dimensional scaling indicated a distinct separation of S4 from S1, S2, and S3. Analysis of water quality revealed a pristine nature at S1, with gradual deterioration downstream. Significant relationships were identified between most water quality variables and fish community structure. Principal component analysis showed that pH (20.96%), total alkalinity (13.80%), specific conductivity (9.92%), nitrite (NO₂; 12.19%), and total dissolved solids (TDS; 6.22%) contributed significantly to the first principal component (Dim1), while nitrate (NO₃; 53.43%) and water temperature (6.05%) influenced the second principal component (Dim2). Biota and/or environment matching (BIO-ENV) analysis reflected that ammonia (NH₃), NO₃, carbon dioxide (CO₂), TDS, total alkalinity, pH, specific conductivity, dissolved oxygen (DO), and water temperature significantly correlated with fish abundance and community composition. This study provides critical insights into the role of environmental parameters in shaping the fish community structure in a less-explored tropical river of the Eastern Himalayas and offers valuable information for the sustainable management of riverine fish diversity.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184712","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":"Artificial light at night reduces emergence and attracts flying adults of aquatic Diptera","authors":"A. Manfrin,&nbsp;F. Hölker,&nbsp;S. Teurlincx,&nbsp;V. Baranov,&nbsp;R. H. A. van Grunsven,&nbsp;M. Bundschuh,&nbsp;M. T. Monaghan","doi":"10.1007/s00027-025-01161-7","DOIUrl":"10.1007/s00027-025-01161-7","url":null,"abstract":"<div><p>Artificial light at night (ALAN) is a widespread, human-induced alteration of the landscape that affects insect dispersal and potentially contributes to insect decline. We used an experimental area with streetlights installed adjacent to an agricultural drainage ditch to experimentally assess the abundance and diversity of emerging and flying aquatic Diptera over a period of six months in summer and autumn. Emergence was two-fold lower in the lit site, while flying adults were eight-fold more abundant at traps under lights. Results were taxon- and sex-specific. Males of nine taxa were less abundant in lit emergence traps, and females of most taxa were more abundant in lit air-eclector traps than in controls. We developed an empirical model based on emergence and capture rates and used this model to estimate that the majority of the 54 flying Diptera taxa we identified were attracted to light from the adjacent water body, and that a few taxa were attracted from a distance of up to 1800 m. This work provides evidence that artificial light in riparian areas can reduce emergence in aquatic Diptera and hinder dispersal, with effects that vary depending on the taxon. Because many riparian predators rely on adult aquatic insects as prey, these changes can cascade across aquatic-terrestrial ecosystem boundaries. Given the large number of streetlights that are installed along freshwater shorelines, the observed effects are likely to be of relevance to freshwater bodies around the globe.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-025-01161-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108627","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":"Influences of dissolved organic matter on phytoplankton functional diversity and resource use efficiency differ in three lakes with contrasting trophic state and depth","authors":"Zhirong Yu,&nbsp;Di Song,&nbsp;Jingyi Li,&nbsp;Hucai Zhang,&nbsp;Jiang Qin,&nbsp;Lirong Song,&nbsp;Erik Jeppesen,&nbsp;Qichao Zhou","doi":"10.1007/s00027-025-01168-0","DOIUrl":"10.1007/s00027-025-01168-0","url":null,"abstract":"<div><p>Dissolved organic matter (DOM) plays a crucial role in both the penetration of light underwater and the biogeochemical cycles of carbon and nutrients in lakes, thereby largely influencing phytoplankton community structure and ecosystem functioning. However, how DOM affects phytoplankton functional diversity (FD) and resource use efficiency (RUE), especially in contrasting lake types is not well-known. In the study reported here, we explored the influences of DOM on phytoplankton FD and the RUEs of nitrogen and phosphorus in three lakes (i.e., a deep oligotrophic lake, Lake Fuxian; a shallow mesotrophic lake, Lake Erhai, and a shallow eutrophic lake, Lake Qilu), all located in southwest China. We found that the relationships between DOM properties and phytoplankton composition, FD and RUEs differed in these three lakes and exhibited seasonality. Partial least squares path modeling revealed the different pathways by which dissolved organic carbon (DOC) concentration influenced phytoplankton FD and RUE between the lakes. In Lake Fuxian, DOC promoted RUE by positively affecting phytoplankton FD and indirectly regulated FD and RUE by affecting water transparency and temperature. In Lake Erhai, DOC affected RUE by altering nutrient supplements. In Lake Qilu, in addition to the negative direct influence of DOC on FD, DOC affected FD or RUE by regulating water transparency and temperature. These results imply that the modulation of DOM on available resources will shift across lake depth and trophic state gradients, profoundly affecting phytoplankton diversity and/or ecosystem functioning. Our study provides a reference for furthering current understanding of biodiversity‒ecosystem functioning in lakes, particularly within the context of environmental pressures such as increased DOM and nutrient levels.</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":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108111","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":"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}