Aquatic Sciences最新文献

{"title":"Combined effects of fungicides and temperature affect non-target aquatic fungal assemblages","authors":"Cristiane Biasi,&nbsp;Luiz Ubiratan Hepp","doi":"10.1007/s00027-024-01148-w","DOIUrl":"10.1007/s00027-024-01148-w","url":null,"abstract":"<div><p>The extensive use of pesticides in agriculture can lead to water contamination and have adverse effects on different groups of aquatic organisms, including those that are not targeted. In this context, organisms involved in the decomposition of organic matter in terrestrial and aquatic ecosystems can be affected by these chemicals. In addition, in a climate change scenario, changes in temperature can potentiate this effect, as this variable is a modulator of biological processes. The aim of this study was to investigate the effects of acute and chronic exposure of a commercial fungicide on aquatic decomposing fungi (non-target) at different temperatures (18 °C and 22 °C). For this, two experiments were carried out: (1) acute, in which the fungi were exposed to the fungicide during the stimulation of sporulation (48 h) at both temperatures, and (2) chronic, in which the fungi were exposed to the fungicide during the period of substrate colonization (25 days) at both temperatures. The effective concentration to inhibit 50% (EC50) of sporulation rates at 22 °C was lower than at 18 °C. For both situations, fungal activity was inhibited with increasing fungicide concentrations. It was also verified that the temperature had an important role in the fungal response to stressors, since an increase in temperature potentiated the fungicide effect in the acute and chronic experiments. The results show that excessive use of fungicides, associated with an increase in temperature, can cause changes in the fungal community and their ability to reproduce.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810849","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":"Comparative analysis of contemporary and subfossil Cladocera assemblages with respect to lake utilisation and environmental factors","authors":"István Gyulai,&nbsp;Arber Hajredini,&nbsp;Kinga Varga,&nbsp;Jázmin Jakab,&nbsp;Ángel Gabriel Vallejo-Cuzco,&nbsp;Imre Somlyai,&nbsp;István Grigorszky,&nbsp;Csaba Berta","doi":"10.1007/s00027-024-01146-y","DOIUrl":"10.1007/s00027-024-01146-y","url":null,"abstract":"<div><p>Shallow lakes hold significant ecological importance, serving as habitats for various species and functioning as carbon sinks. In this study we investigated contemporary and subfossil Cladocera assemblages of a mixed-use (nature protection, agriculture and recreation) shallow oxbow lake. We examined the effects of utilisation on species variations and how these utilisations can affect Cladocera species. A total of 36 species were identified, from which ten were only found in the contemporary assemblage, with 35 belonging to the subfossil assemblage. The subfossil assemblage showed consistently higher species richness and abundance. The highest number of species in both assemblages was found in the protected area, which also exhibited the highest number of individuals for the contemporary assemblage. The Mantel test indicated a weak correlation between the assemblages collected. Non-metric multidimensional scaling revealed a clear separation between the agriculturally utilised section and other areas based on the composition of the contemporary assemblage. Furthermore, canonical correspondence analysis identified potential associations between specific chemical and physical variables and the observed variations in species abundances. These findings highlight the impacts of utilisation types and suggest environmental factors influence Cladocera distribution and abundance.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811311","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":"Feeding ecology of a detritivorous fish in controlled flood pulse area in the Amazon revealed by stomach content and stable isotopes analyses","authors":"Izabella Cristina da Silva Penha,&nbsp;Antonio Augusto Jardim Jr.,&nbsp;Erival Gonçalves Prata,&nbsp;Lidia Brasil Seabra,&nbsp;Rafael Rodrigues Gusmão,&nbsp;Giovanna Teixeira Ferreira,&nbsp;Ana Flavia do Vale Neves Machado Costa,&nbsp;Tiago Magalhães da Silva Freitas,&nbsp;Luciano Fogaça de Assis Montag","doi":"10.1007/s00027-024-01147-x","DOIUrl":"10.1007/s00027-024-01147-x","url":null,"abstract":"<div><p>This study aimed to assess the trophic dynamics of a detritivorous species throughout various hydrological periods in a reduced flow section, Volta Grande, of the Xingu River. Specimens were collected between December 2020 and November 2021 using gill nets. Stomachs were dissected to examine their contents, and muscle tissue samples were collected for isotopic analyses of δ¹³C and δ¹⁵N. The diet across hydrological periods was analysed using permutational multivariate analysis of variance. Variation in trophic niche breadth was evaluated using permutational dispersion analysis with food importance values. Feeding intensity was evaluated using the repletion index, and its variation across periods was tested using Kruskal-Wallis. Isotopic structure across hydrological periods was evaluated through analysis of variance. Isotopic niche overlap was calculated using the corrected standard ellipse area metric. Mixed effect models were employed to estimate the contributions of basal resources assimilated by the species across periods. Our results revealed stable patterns in the diet and energy sources of the species across different hydrological periods. Given the escalating impact of human activities on natural seasonal variations in rivers, conducting detailed trophic studies and employing precise methods to reconstruct food webs and energy flow in altered aquatic ecosystems are essential. This information is crucial for guiding measures aimed at protecting and conserving these environments and the ichthyofauna reliant on them.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811310","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":"Fine sediments produce tipping points in the taxonomic and functional structure of benthic macroinvertebrates in neotropical streams","authors":"Pedro Henrique Monteiro do Amaral,&nbsp;Marden Seabra Linares,&nbsp;Tiago Chagas de Oliveira Tourinho,&nbsp;Robert M. Hughes,&nbsp;Marcos Callisto","doi":"10.1007/s00027-024-01144-0","DOIUrl":"10.1007/s00027-024-01144-0","url":null,"abstract":"<div><p>The influence of substrate homogenization on the taxonomic structure of benthic macroinvertebrate assemblages is well known worldwide. However, understanding the response thresholds of macroinvertebrate assemblages to a fine sediment deposition gradient is rarely reported for neotropical regions. Furthermore, most studies focus on taxonomic indicators, without considering the functional aspects of benthic macroinvertebrates. Therefore, we used taxonomic and functional analyses to assess the threshold responses of macroinvertebrate assemblages to fine sediments in 40 neotropical savanna streams in the hydrological unit of the Furnas hydropower reservoir. We found that stream locations with increased fine sediment supported lower taxonomic and functional composition, negatively selecting for the functional traits of gill respiration and flattened and streamlined body shape. In contrast, integument respiration and spherical body characterized macroinvertebrates positively associated with fine sediments. We also found that taxonomic (Shannon and Simpson indices) and functional (functional richness and functional evenness) indicators were sensitive to habitat homogenization resulting from increased fine sediments. We strongly recommend that energy companies monitor hydropower basins by identifying areas with accumulations of fine sediments, using the taxonomic and functional components of macroinvertebrates in the biomonitoring of neotropical streams. This information is of critical importance for future rehabilitation efforts to avoid siltation of tropical hydropower dams. Besides intense unplanned urbanization and agriculture, the climate crisis is predicted to increase intense tropical rains and sediment transport in headwater streams. Benthic structure and functional composition are early warning signals of environmental degradation and important indicators for long-term monitoring and rehabilitation investments worldwide.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142736889","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":"Changes in basal resources mediate the effects of Eucalyptus spp. afforestation on macroinvertebrate functional diversity in subtropical lowland streams","authors":"G. Margenny Barrios,&nbsp;Blanca Ríos-Touma,&nbsp;Dieison A. Moi,&nbsp;Maite Burwood,&nbsp;Jimena Alonso,&nbsp;Franco Teixeira de Mello","doi":"10.1007/s00027-024-01141-3","DOIUrl":"10.1007/s00027-024-01141-3","url":null,"abstract":"<div><p><i>Eucalyptus</i> afforestation negatively affects the ecological condition of streams by impacting macroinvertebrates, whose responses to habitat deterioration and changes in basal resources are not well understood. This study examines the effects of <i>Eucalyptus</i> afforestation on macroinvertebrate functional diversity and trait structure, driven by variations in local habitat and basal resources. The study was conducted once in summer and winter across 27 subtropical lowland streams along an <i>Eucalyptus</i> spp. afforestation gradient. We measured physicochemical water parameters, habitat variables (substrates, depth and current velocity) and biomass of basal resources (macrophytes, periphyton and detritus) simultaneously with macroinvertebrate sampling. We used co-inertia multivariate RLQ and four-corner analyses to explore relationships between physicochemical water parameters, local habitat and basal resources, with trait structure. Structural equation modelling-SEM was used to understand the direct and indirect effects of <i>Eucalyptus</i> afforestation on macroinvertebrate functional diversity. SEM revealed that <i>Eucalyptus</i> afforestation indirectly reduced macroinvertebrate functional diversity by reducing macrophyte biomass in both seasons. The RQL analysis revealed a positive correlation among the biomass of macrophytes, density of predators and number of small- and medium-sized animals. This suggests that the decrease in macrophyte biomass may affect the available refuges and biological interactions by affecting predators and small and medium body sizes. These findings emphasise the importance of macrophytes in sustaining a unique functional trait composition of macroinvertebrates in stream ecosystems. Although afforestation did not influence substrate types, they positively affect functional diversity. Macroinvertebrate functional traits are effective indicators of ecological degradation in streams affected by <i>Eucalyptus</i> afforestation.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664426","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":"Diurnal variations in greenhouse gas diffusive emissions from a river covered with submerged macrophytes: environmental and biotic driving factors","authors":"Haoyu Wang,&nbsp;Rong Wu,&nbsp;Deshou Cun,&nbsp;Yi Zhang,&nbsp;Yukun Hou,&nbsp;Junjun Chang","doi":"10.1007/s00027-024-01131-5","DOIUrl":"10.1007/s00027-024-01131-5","url":null,"abstract":"<div><p>Rivers are globally important sources of carbon emissions, but the diurnal pattern of greenhouse gas (GHG) emissions from rivers colonized with submerged macrophytes has rarely been explored. We determined the dissolved concentrations and diffusive fluxes of CO₂, CH₄, and N₂O from a river covered with submerged macrophytes under different meteorological conditions (i.e., nighttime, cloudy, and sunny daytime) over a continuous 36-h period. Overall, the river functioned as a CO₂ sink during the daytime, while it transitioned to a CO₂ source at nighttime, primarily because of diurnal variations in plant metabolisms. No similar diurnal fluctuations in CH₄ or N₂O emissions were detected, and the highest fluxes of CH₄ or N₂O were measured during sunny daytime. In total, the river emitted more carbon at nighttime, with CH₄ contributing most to the total emissions on the basis of a CO₂ equivalent. Dissolved organic matter (DOM) in the river, whose properties were potentially modulated by submerged macrophytes, considerably influenced GHG emissions. Distinct dissimilarities were observed in the microbial communities inhabiting the river sediment and biofilms on plant leaves. Microbial communities in the sediment played more important roles in biogeochemical cycles, while the regulatory effects of epiphytic microbiota on GHG emissions should not be ignored. Multiple regression and structural equation modeling analyses revealed that the dissolved oxygen concentration, temperature, humification index (HIX) of DOM, and NH₄⁺–N concentration significantly influenced CO₂ diffusive fluxes, while CH₄ dynamics were predominantly influenced by DOM properties. Salinity, HIX, NH₄⁺-N concentration, and microbial consortia were the predominant factors influencing N₂O emissions.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636660","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":"Tolerance of neonates of freshwater snails to starvation and desiccation and its relationship to invasiveness","authors":"Rocío Pilar Amondarain,&nbsp;Nicolás Eduardo Tamburi,&nbsp;Pablo Rafael Martín","doi":"10.1007/s00027-024-01133-3","DOIUrl":"10.1007/s00027-024-01133-3","url":null,"abstract":"<div><p>Biological invasions threaten biodiversity and cause severe ecological and socioeconomic impacts. Freshwater snails are very diverse and many became invasive or have the potential to do so. Studies on the relationship between bioecological traits and invasiveness are needed to prevent new invasions. The tolerance to environmental stressors of the neonate, one of the most vulnerable ontogenetic phases, may be an important component of invasiveness in freshwater snails. We hypothesize that tolerance of neonates to environmental stressors increases the chances of population establishment and persistence and hence of becoming an invader. We predict that the neonates of invasive freshwater snails will show higher survival under starvation and desiccation than those of non-invasive ones and tested this experimentally for three species of each type. We also estimated neonate volume as a proxy of tolerance. We found that the desiccation stress was more severe than the starvation one. The tolerance to starvation of two of the invasive species (<i>Melanoides tuberculata</i> and <i>Pomacea canaliculata</i>) was much higher than that of remaining species but the pattern was less clear for desiccation, which was more directly related to neonate volume. None of the non-invasive species showed high tolerance to these stressors and the invasive <i>Physella acuta</i> groups with them in this regard. On the whole our prediction about the relationship between neonate tolerance and invasiveness stands for five out of the six species tested, indicating that the tolerance of neonates of freshwater snails merits more research effort on other stressors to gain a sounder comprehension of their invasiveness.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636661","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 assemblage structure and functional guild composition of Matla Estuary, Indian Sundarbans","authors":"Rinchen Nopu Bhutia,&nbsp;Dayal Devadas,&nbsp;Kiranya Bella,&nbsp;Giri Bhavan Sreekanth,&nbsp;Asha Taterao Landge,&nbsp;Ashok Kumar Jaiswar,&nbsp;Geetanjali Deshmukhe,&nbsp;Uttam Kumar Mandal,&nbsp;Dhiman Burman","doi":"10.1007/s00027-024-01140-4","DOIUrl":"10.1007/s00027-024-01140-4","url":null,"abstract":"<div><p>The fish assemblage and functional guild composition of Matla estuary (ME), Indian Sundarbans, was studied across different estuarine reaches and seasons for the first time based on spatial and temporal data. A total of 57 finfish species belonging to 15 orders and 34 families were recorded during the study period from August 2022 to July 2023 along ME. The number of species recorded (<i>n</i>) exhibited a declining trend from the lower to upper reaches and was highest during the monsoon season (<i>n</i> = 53) and lowest during pre-monsoon (<i>n</i> = 40). The classification of fishes into guild resulted in seven estuarine use guilds and six feeding guilds. The composition of fish guilds exhibited variation based on site and season. Among estuarine use guilds, marine migrants (<i>n</i> = 28) and marine stragglers (<i>n</i> = 15) were the most prominent categories throughout the sample sites and seasons, while piscivores (<i>n</i> = 30) were the dominant feeding guild throughout the sites and seasons. This study indicates low record of fish diversity, particularly true estuarine and freshwater species. Assessing patterns in the spatial and temporal distribution of estuarine species, as well as variations in their fish diversity and trophic guilds, improves our understanding of the species’ ecological functioning and contributes to our understanding of the effects of anthropogenic stressors on the species for the conservation and management of fishes of Matla estuary.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600724","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":"Influence of water source on alpine stream community structure: linking morphological and metabarcoding approaches","authors":"Daniel L. Preston,&nbsp;Scott Hotaling,&nbsp;Isabella M. Errigo,&nbsp;Paul B. Frandsen,&nbsp;Taylor L. Price,&nbsp;Trinity L. Hamilton,&nbsp;Kurt E. Anderson,&nbsp;Samuel E. Yevak,&nbsp;Jennifer F. Morse","doi":"10.1007/s00027-024-01134-2","DOIUrl":"10.1007/s00027-024-01134-2","url":null,"abstract":"<div><p>Alpine streams support unique biodiversity because of their isolation in the river network and harsh environmental conditions. Variation in water sources to alpine streams are an important driver of benthic community structure; however, studies with long-term data on stream abiotic characteristics and biological communities remain relatively rare. This is especially true for very high elevations where effects of climate change will be most pronounced. We used a combination of morphological and metabarcoding approaches to characterize benthic communities at nine locations within a high elevation catchment (~ 3200 to 3700 m) in the Southern Rocky Mountains, USA. Survey sites included ephemeral and permanent streams dominated by glacier meltwater, snowmelt, lake outflows, and mixed-source waters. Discharge, water temperature, conductivity, pH, total dissolved nitrogen, and total dissolved phosphorus differed between water source types. Environmental differences between source water types reflected their position in the catchment, the influence of subsurface ice meltwater on nitrogen and ions, and the biological activity and stabilizing effects of lakes. In total, we detected 130 macroinvertebrate taxa (52 via morphology and 99 via metabarcoding). Macroinvertebrate composition was more strongly correlated with stream permanence and conductivity than with water temperature or nutrient availability. Glacial and snowmelt-fed streams were dominated by Chironomidae (especially Diamesinae) and Oligochaeta, with increasing richness of Plecoptera, Ephemeroptera, and Trichoptera at the lake-outlet and mixed-source sites. Lake outlets showed the highest beta diversity, with unique communities dominated by various filter feeders (Simuliidae and Sphaeriidae). Alpha diversity was similar at the glacial, snowmelt, and lake outlet sites, but increased at the downstream mixed-source sites which had proportionally more non-dipteran taxa. Our results support the idea that distinct source waters have unique environmental conditions, leading to variation in their community structure. These results provide motivation for conservation efforts that protect a diversity of alpine stream types within and between catchments.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142600726","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":"Do diatom and nematode assemblages reflect the same ecological status in a tropical eutrophic reservoir?","authors":"Thanh Luu Pham,&nbsp;Thai Thanh Tran,&nbsp;Thi Hoang Yen Tran,&nbsp;Thi My Yen Nguyen,&nbsp;Xuan Dong Nguyen,&nbsp;Manh Ha Bui,&nbsp;Tan Duc Nguyen,&nbsp;Thanh Son Dao,&nbsp;Vu Thanh Nguyen","doi":"10.1007/s00027-024-01137-z","DOIUrl":"10.1007/s00027-024-01137-z","url":null,"abstract":"<div><p>It remains uncertain whether diatom and nematode assemblages can reflect the same ecological status in eutrophic reservoirs. To address this uncertainty, we collected diatom and nematode assemblages and measured environmental variables in the tropical eutrophic Tri An Reservoir (TAR) in Vietnam. We assessed the ecological status of each community using various biological metrics, including the Shannon-Weiner diversity index (H′), the Trophic Diatom Index (TDI), and the index of trophic diversity (ITD) of nematodes. Multivariate direct gradient analysis was conducted to determine the environmental variables influencing the dominant diatom and nematode species. We then conducted a nonparametric permutational analysis of variance with two fixed factors to assess differences in all biological variables across communities. The analysis had a cross-sectional design that incorporated “station” and “season” as factors. Our findings indicated that the surface water in the TAR ranges from eutrophic to hypertrophic. Based on these TDI values, we classified the ecological and trophic status of the TAR into two groups: meso-eutrophic and eutrophic. However, the ITD of the nematodes suggested that the ecological status varied from poor to moderate or high. Our findings suggest inconsistency between two bioindicator groups in their ability to reflect surface water quality in the TAR. This study highlights the potential of using the TDI of diatoms and emphasizes the need to revise the H′ and ITD indices of nematodes if they are to be incorporated into lake monitoring programs for assessing ecological status.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142598980","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}