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This study aimed to experimentally examine the impact of organic matter content on some of compression characteristics of fine-grained riverine soils from southern Iraq. A total of eight soil samples were collected from two various riverine areas, presenting natural levee and basin (fine-grained) soils, in the eastern Basrah region. The research explored the correlation between organic matter content and compression characteristics, highlighting changes in unit weight, permeability, and compressibility. Findings showed that higher organic matter content led to lower density, increased permeability, and higher compressibility. The research offers valuable contributions to understanding the relationship between organic matter and soil compressibility, particularly relevant for sustainable soil management in the lower Mesopotamia region of southern Iraq, where those areas are vulnerable to climate change. [ABSTRACT FROM AUTHOR]

The paper presents a detailed ecological investigation of mangroves (trees and palm) along Carigara Bay in Leyte, Philippines by comparing the diversity, vegetation structure, species composition, and indicator species among forest types (riverine and fringe) and zones (landward, middleward, and seaward/along water) as well as by examining their relationships with environmental variables. A total of 22 mangrove species, belonging to 12 families were documented wherein the most abundant was Sonneratia alba, followed by Nypa fruticans, then by Avicennia rumphiana. It was found that the diversity (Shannon-Wiener) of riverine mangroves (0.94 ± 0.07; 1.20 ± 0.04) was significantly higher than the fringe at the middleward and seaward/along the water (p < 0.001). In the fringe mangrove forests, the mangrove species Aegiceras corniculatum was associated with the middleward zone, and Camptostemon philippinensis, Aegiceras floridum, Rhizophora mucronata, Sonneratia alba, and Lumnitzera littorea were associated with the seaward zone, whereas landward zone of fringe and all the zones in riverine were generally associated by species with low to optimum salt tolerances such as Nypa fruticans, and Avicennia rumphiana as the most abundant. As well, a total of 14 mangroves have been identified as indicator species. Lastly, mangrove species can be generally classified as riverine and fringing based on the environmental factors explaining their distributions, and it has been found that soil porosity, water content, soil salinity, and distance from the sea or river's edge were the most significant environmental factors that determine diversity patterns. [ABSTRACT FROM AUTHOR]

Conservation planning requires understanding population sizes and trajectories. As with many imperiled species, green sturgeon (Acipenser medirostris) census data are limited, making it difficult to contextualize current threats and promote quantitative conservation goals. We combined spawning census, growth, and demographic data for the southern population of green sturgeon to build a population size and trajectory estimate. We generated a distribution of population size estimates and trajectories reflecting uncertainty from multiple sources. We then propagate these estimates through a demographic model to assess the potential impact of fishing bycatch. Our model suggests the population is below the recovery goal of 3000 adults. The most probable current total population estimate (including juveniles) is approximately 10 000 fish (5300–18 400 95% high density interval (HDI)), with 2400 adults (2197–2624 95% HDI). Simulated fishing bycatch pressure on the adults and subadults reduced abundance by a median value of 0.4% per year, which could be an impediment to recovery. Fisheries bycatch is one of many threats this population faces; this integrated framework may be used to assess how other threats may affect this population. [ABSTRACT FROM AUTHOR]

Snorkel surveys were conducted on the Sacramento River to investigate the relative importance of microhabitat and mesohabitat scales on the abundance of young of the year (YOY) Chinook salmon (Oncorhynchus tshawytscha), while taking into account temporal and segment-scale spatial variations. Sites, with 13 different mesohabitat types, were sampled nine times from April to September in 1996. Both the sites and cells within the sites were classified by cover type. The analyses revealed that the microhabitat scale, specifically woody cover, best explained YOY abundance, versus the mesohabitat scale. Temporal and large-scale spatial patterns reflect the timing and abundance of different runs of Chinook salmon, while microhabitat scale patterns reflect cover preference of YOY Chinook salmon.

Introduction: The traditional communities of the Brazilian Amazon possess significant knowledge regarding the huge therapeutic arsenal available from natural sources that can be used to care for their health problems. This study aimed to identify, map and synthesize the scientific evidence on the use of traditional medicine as a therapeutic resource when used by traditional communities of the Brazilian Amazon. Methods: This is a scoping review, which is a method used to map the main concepts of a research area, the available evidence and its sources. It is developed in five steps: (1) identification of the research question; (2) identification of relevant studies; (3) selection of studies; (4) data analysis; and (5) grouping, synthesis and presentation of data. Results: Medicinal plants, vertebrates and invertebrates, among other medicinal products, are elements that are widely used by traditional populations. Plant stems, bark, leaves, flowers, fruits, seeds, roots, tubers and even the whole plant are prepared in various forms, such as teas, infusions, smoke for rituals, baths, macerations, oils, ointments, concoctions, dressings, incenses and exfoliants, among others. The main structures and forms used from animals are lards, fats, viscera, horns, cocoons, nests, feathers and beaks of birds, eggs and roes. These therapeutic practices are often carried out using endogenous, wild and domesticated natural resources present in the biodiverse environments of traditional populations. They involve magical-religious beliefs to treat all types of illnesses, including cultural syndromes that affect children, young people, adults and the elderly. Conclusion: This scoping review has an important role to disseminate and expand the discussion of traditional medicine practices, inviting readers - whether they are health professionals, community members, managers or decision-makers - to a continuing debate using an intercultural dialogue necessary to improve approaches. From this perspective, it is essential to consider the comprehensive legal and legal framework that guides the public policies of national health systems.

The Ripon barbel, Labeobarbus altianalis, a riverine fish found in the Lake Victoria Basin is regarded as species of less concern, but it is vulnerable to overfishing and population decline. This study aimed at determining growth, mortality, exploitation rate, and recruitment patterns of L. altianalis (Boulenger, 1900) in River Kuja-Migori. A total of 1,217 specimens with overall total lengths ranging from 9.5-41.5 cm (mean 28.5 ± 2.7) were collected monthly from January to December 2021. The fish were caught using an electrofisher in wadable areas and monofilament nets in deeper areas. Electronic length frequency analysis (ELEFAN) software in Fish Stock Assessment Tools (FiSAT II) program was used to analyze data. Natural mortality (M) Fishing mortality (F) and total mortality (Z) coefficients were 0.15 year-1, 0.52 year-1 and 0.67 year-1 respectively. The asymptotic length (L∞) was 44.94 cm TL while the instantaneous growth rate (K) was 0.15 year-1. The exploitation rate was 0.44 year-1 and the length-based growth performance index (Ø’) was 3.03. Results indicated that the longevity of L. altianalis was 9 years. Recruitment occurs throughout the year with bimodal annual recruitment peaks coinciding with the two rainy seasons in the region. This study provides important information for developing management advice for the L. altianalis riverine fishery.

Recovery of many seal populations has intensified seal‐fishery conflicts. Acoustic deterrent devices (ADDs), designed to deter seals while minimising collateral harm, provide a potential solution. We investigated feasibility of ADDs to protect a European whitefish (Coregonus lavaretus) fishery in the River Iijoki, Finland, which enters the Baltic Sea. A sound barrier produced by a line of ADDs across the river efficiently prevented grey (Halichoerus grypus) and ringed (Pusa hispida) seals from passing the barrier line, thereby increasing catches, decreasing damage to fishing gear and catch and resulting in fewer seal sightings in the area safeguarded by ADDs. Hence, blocking access of seals to a river or its section by ADDs during a critical fishing period is a promising method for reducing seal‐induced catch losses. However, long‐term assessments of impacts of ADDs are still needed to verify the overall effectiveness. [ABSTRACT FROM AUTHOR]

The flood of Damodar river is a well-known fact which is used to the whole riverine society of the basin as well as to the eastern India. The study aims to estimate the spatio-temporal probability of floods and identify susceptible zones in the Lower Damodar Basin (LDB). A flood frequency analysis around 90 years hydrological series is performed using the Log-Pearson Type III model. The frequency ratio model has also been applied to determine the spatial context of flood. This reveals the extent to which the LDB could be inundated in response to peak discharge conditions, especially during the monsoon season. The findings indicate that 36.64% of the LDB falls under high to very high flood susceptibility categories, revealing an increasing downstream flood vulnerability trend. Hydro-geomorphic factors substantially contribute to the susceptibility of the LDB to high magnitude floods. A significant shift in flood recurrence intervals, from biennial occurrences in the pre-dam period to decadal or vicennial occurrences in the post-dam period, is observed. Despite a reduction in high-magnitude flood incidents due to dam and barrage construction, irregular flood events persist. The effect of flood in the LDB region is considered to be either positive as well as negative in terms of wholistic sense and impact. The analytical results of this research could serve to identify flood-prone zones and guide the development of flood resilience policies, thereby promoting sustainability within the LDB floodplain. [ABSTRACT FROM AUTHOR]

Amazon is a hotspot for mercury (Hg) contamination and Terra do Meio region, despite its protected status for sustainable use, has never been monitored for this element. Looking to address this gap, this study aimed to quantify capillary Hg concentration in riverine populations of Terra do Meio (Xingu Basin, Central Amazon, Brazil) and associated factors with high Hg levels (90 percentile). Hair samples from 182 individuals from Iriri, Riozinho do Anfrísio and Xingu Extractive Reserves (RESEX), aged between 18 and 70 years old, were collected to measure total mercury levels (HgT), and socioeconomic, demographic, and clinical-epidemiological data were annotated. Overall, high levels of Hg were observed (mean 4.985 µg/g, median 3.531 µg/g) with significant differences between localities. Among the factors related to high capillary Hg levels, male gender, smoking habit, work in agriculture, livestock or extractivism, and residence in Iriri and Riozinho do Anfrísio RESEX were highlighted. A high prevalence of symptoms related to Hg intoxication, including anxiety, memory deficit, and lower limb problems, was observed. Overall, the results reveal that communities in these RESEXs are exposed to Hg and appear to be suffering from chronic health effects. Considering the increased anthropogenic alterations observed recently in the Amazon region and the subsequent amplified environmental bioavailability of Hg, further studies and mitigating actions are critical. This includes better surveillance of illegal anthropic activities and provision of ongoing education on this matter and incentives for dietary adaptations. [ABSTRACT FROM AUTHOR]

Documenting the diet of organisms that have been introduced and naturalised outside their native range is a fundamental component of understanding their trophic interrelations in the receiving environment, and for developing holistic management practices for introduced species' predation impacts in an ecosystem. We describe two accounts of terrestrial reptiles in the diet of an introduced fish, rainbow trout Oncorhynchus mykiss in southern NSW, Australia. Our observations from the Southern Hemisphere together with recently published records from the Northern Hemisphere (e.g. USA, France and Italy) represent the presence of reptiles in the diet of O. mykiss across a broad geographical range and highlight a potential additional consideration of introduced salmonids and their impacts on terrestrial species. [ABSTRACT FROM AUTHOR]

Opisthorchis pedicellata (Verma, 1927) a common trematode parasite was recovered from the gallbladder of the freshwater catfish species Rita rita (Ham.) from Gomti riverine ecosystem of Lucknow, India. The study is focussed on the seasonal and monthly variation in helminth infection represented by parameters like prevalence % and Mean Intensities. This is assessed for the fluke Opisthorchis pedicellata that was recovered from the catfish Rita rita for two annual cycles (July 2021 to June 2023). A total of 840 Rita rita fish were randomly collected from local fisherman from Pipraghat of Gomti river, Lucknow. The fishes were dissected for investigating the parasitological presence of fluke Opisthorchis pedicellata. Presence of the fluke was recorded throughout the study period but in varying intensities and seasonal cycle of occurrence. The prevalence% ranged between 37.43% to 71.43%. In the month of August 2022, 71.43% of the total examined fishes were found infected with the fluke. The prevalence% was least during the month of December 2021 when only 37.43% of the fishes examined were found infected. The maximum mean intensity was seen in the month of July 2022 while the minimum was observed during the month of February 2022. [ABSTRACT FROM AUTHOR]

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Abstract Background Recent studies indicate a partial recovery of European stream macroinvertebrate diversity. However, the key determinants shaping the overall community trends are only partly explored, owing to insufficient long-term environmental data collected in parallel with community responses. We investigate long-term trends in stream macroinvertebrate communities (i.e., taxonomic and trait composition and metrics), and explore their relationships to diverse environmental drivers (i.e., land-use, runoff, water temperature, and in-stream chemicals). We use macroinvertebrate data collected annually in spring and summer between 2007 and 2021 at four sampling sites within the Rhine-Main-Observatory Long-Term Ecological Research site. These sampling sites encompass a gradient from less-disturbed to disturbed conditions. Results Over time, shifts in taxonomic and trait composition and metrics indicated an improvement in environmental conditions. Long-term trends of biological trait metrics mirrored those for taxonomic metrics; for example, increases over time in taxonomic richness were paralleled by increases in functional richness and functional dispersion. Meanwhile, trends of ecological trait metrics were particularly driven by changes in environmental drivers. Land-use, water temperature, and runoff explained around 20% of the overall variance in long-term trends of macroinvertebrate communities. Water temperature and land-use played relatively equal roles in shaping taxonomic and trait composition and metric responses in spring, while water temperature emerged as the most influential driver in summer. However, when incorporating long-term chemical data as a more direct measurement of changes in land-use, the overall variance explained in macroinvertebrate community trends increased to c.a. 50% in both seasons. Conclusions Examining more relevant driver variables beyond land-use and climate improves insights into why biodiversity exhibits long-term trends. We call for an increase in initiatives to link biodiversity monitoring with parallel sampling of relevant environmental drivers.

Background: Recent studies indicate a partial recovery of European stream macroinvertebrate diversity. However, the key determinants shaping the overall community trends are only partly explored, owing to insufficient long-term environmental data collected in parallel with community responses. We investigate long-term trends in stream macroinvertebrate communities (i.e., taxonomic and trait composition and metrics), and explore their relationships to diverse environmental drivers (i.e., land-use, runoff, water temperature, and in-stream chemicals). We use macroinvertebrate data collected annually in spring and summer between 2007 and 2021 at four sampling sites within the Rhine-Main-Observatory Long-Term Ecological Research site. These sampling sites encompass a gradient from less-disturbed to disturbed conditions. Results: Over time, shifts in taxonomic and trait composition and metrics indicated an improvement in environmental conditions. Long-term trends of biological trait metrics mirrored those for taxonomic metrics; for example, increases over time in taxonomic richness were paralleled by increases in functional richness and functional dispersion. Meanwhile, trends of ecological trait metrics were particularly driven by changes in environmental drivers. Land-use, water temperature, and runoff explained around 20% of the overall variance in long-term trends of macroinvertebrate communities. Water temperature and land-use played relatively equal roles in shaping taxonomic and trait composition and metric responses in spring, while water temperature emerged as the most influential driver in summer. However, when incorporating long-term chemical data as a more direct measurement of changes in land-use, the overall variance explained in macroinvertebrate community trends increased to c.a. 50% in both seasons. Conclusions: Examining more relevant driver variables beyond land-use and climate improves insights into why biodiversity exhibits long-term trends. We call for an increase in initiatives to link biodiversity monitoring with parallel sampling of relevant environmental drivers. [ABSTRACT FROM AUTHOR]

India is a country of rivers. Sundarban is the world’s largest deltaic region, which is also part of the Ganga region. Highly populated this region is frequently faced intensive floods. The objective of this paper is to give a notion about the potential embankment zone along the Vidyadhari River. Changes in riverbanks since 1972 have been highlighted through GIS and Remote Sensing Applications. Through this paper, erosional and depositional zones along the Vidyadhari River are also spotted out. The potential embankment zone is measured by the vulnerability analysis based on river bank shifting. The proper embankment technology has also suggested a sustainable embankment along the river Vidyadhari river, which is guided by the Irrigation Department, Government of West Bengal.

Nitrogen (N) pollution in riverine ecosystems has substantial environmental, economic, and policy consequences. Various riverine N removal processes include permanent dissimilatory sinks such as denitrification (Uden) and temporary assimilatory sink such as microbial N uptake (Uassim). Both processes have been extensively evaluated in benthic sediments but only sparsely in the water column, particularly for storm flows producing high suspended sediment (SS) concentrations. Stormflows also increase the sediment bound N (Sed-N) export, and in turn, the overall N exports from watersheds. The balance between N removal by Uden and Uassim vs. Sed-N export has not been studied and is a key knowledge gap. We assessed the magnitude of Uden and Uassim against stormflow Sed-N exports for multiple storm events of varying magnitude and across two drainage areas (750 ha and 15,330 ha) in a mixed landuse mid-Atlantic US watershed. We asked: How do the Uden and Uassim sinks compare with Sed-N exports and how do these N fluxes vary across the drainage areas for sampled storms on the rising and falling limbs of the discharge hydrograph? Mean Uden and Uassim as % of the Sed-N exports ranged between 0.1–40% and 0.6–22%, respectively. Storm event Uassim fluxes were generally slightly lower than the corresponding Uden fluxes. Similarly, comparable but slightly higher Uden fluxes were observed for the second order vs. the fourth order stream, while Uassim fluxes were slightly higher in the fourth-order stream. Both of these N sinks were higher on the falling vs. rising limbs of the hydrograph. This suggests that while the N sinks are not trivial, sediment bound N exports during large stormflows will likely overshadow any gains in N removal by SS associated denitrification. Understanding these N source-sink dynamics for storm events is critical for accurate watershed nutrient modeling and for better pollution mitigation strategies for downstream aquatic ecosystems. These results are especially important within the context of climate change as extreme hydrological events including storms are becoming more and more frequent.

Community-based macroinvertebrate habitat suitability criteria are needed for two reasons: (1) community-based criteria, such as with macroinvertebrates, are a better measure of ecosystem health than single-species habitat suitability criteria (HSC); and (2) if food rather than physical habitat is the limiting factor for juvenile salmonids, it is better to evaluate habitat restoration projects based on macroinvertebrate habitat than juvenile habitat. The goal of this study was to generate habitat suitability criteria for macroinvertebrates in the Sacramento River. Habitat suitability criteria were derived for three macroinvertebrate community metrics. One of the metrics (biomass of baetids, chironomids and hydropsychids) was selected to represent food supply for juvenile salmonids, while the other two metrics (total biomass and diversity) were selected as measures of ecosystem health. Baetidae, Chironomidae and Hydropsychidae were chosen because they are the dominant taxa present in stomach contents samples of Sacramento River juvenile Chinook Salmon Oncorhynchus tschawytscha. Habitat suitability criteria were developed using data from 75 macroinvertebrate samples stratified by season, mesohabitat type, depth, velocity, and substrate. The criteria for depth, velocity and substrate were developed taking into account several potential confounding variables, and using a polynomial regression for depth and velocity, and analysis of variance for substrate (a categorical variable). The criteria showed no effect of substrate on baetid/chironomid/hydropsychid biomass or diversity. Criteria for total biomass showed a higher suitability for larger cobbles, versus other substrates, for total biomass. The optimum depths for baetid/chironomid/hydropsychid biomass, total biomass and diversity were, respectively, 0.82–0.85 m, 0.61–0.67 m and 1.16–1.19 m. The optimum velocities for baetid/chironomid/hydropsychid biomass, total biomass and diversity were, respectively, 0.73–0.79 m/sec, 0.61–0.67 m/sec, and 0.61–0.73 m/s. Suggestions for development of future macroinvertebrate HSC include: (1) stratifying sampling by depth, velocity and substrate; (2) measuring the amount of organic matter in samples for use as an additional potential confounding factor; and (3) sampling a large area (0.84 m2) with a sampler with a rubber foam lining on the bottom of the sampler.

There is an emerging concern about the accumulation of MPs in aquatic ecosystems. In this context as compared to the study of marine environment the freshwater environment has not yet been explored. Microplastics have become an emerging hazard to the natural environment and humanity, which can now be frequently found in different aquatic bodies. Due to their pervasive occurrence in the environment, it can impose severely negative impacts on aquatic organisms. Microplastic particles can also associate with other pollutants like metals and different organic pollutants, which further increase their toxicity. Riverine systems are the most important transporters of these materials from terrestrial to marine environments. It is documented that amongst the rivers, Yangtze (China) contributes the highest plastic litter discharge followed by the Indian, Ganges to the marine environment. In India, scanty data are available on MPs contamination in freshwater environs and it was found that more weightage has been given to the marine environment of east and west coastal regions. Therefore, this paper aims at reviewing the existing as well as current research progress on the abundance, distribution, toxicity, and effects of MPs pollution in the riverine ecosystem in India. [ABSTRACT FROM AUTHOR]

Safety and purity of drinking and cooking water sources in rural and riverine communities like Okerenkoko have posed a challenge for scientific discuss in recent times. Water devoid of both chemical and microbiological contaminants have been identified as a major key to wellness of any populace. In this study, eight potable water sources were obtained and evaluated for the study; the potable water sources obtained were treated to a 10-fold serial dilution and plated for aerobic bacterial, fungal, Salmonella-Shigella and Escherichia coli count. The antibiotics sensitivity testing employed the modified Kirby- Bauer method using the Abtek biological multiple disc. The multiple drug resistance was mathematically deduced using the standards and breakpoints. The NMU and George borehole had 5.8 Log10CFU/ml and 5.4 Log10CFU/ml for the total aerobic bacterial count while the total fungal count were 3.1 Log10CFU/ml and 3.6 Log10CFU/ml respectively. The culturable flora observed during the study were Bacillus sp, Escherichia sp., Staphylococcus sp., Streptococcus sp., Shigella sp., Proteus sp., Pseudomonas sp., Klebsiella sp., Vibrio sp. Micrococcus sp. and Escherichia coli. The percentage resistance for the antibiotics revealed cefuroxime and ceftazidime had 64%, while nitrofurantoin had 71% and ofloxacin had 36%. Proteus sp. (1) had an MDR of 1.0, Klebsiella sp. (3) had 0.67 while Salmonella sp. and Escherichia coli had a MDR of 0.22 and 0.11. The findings of the study underscores the health challenges associated with the usage of the available potable water sources in Okerenkoko community. There is need for a community-wide campaign and sensitization on some basic water purification approaches as possible corrective actions to improve the quality of water; government must intervene and provide a routine and robust evaluation for both water safety and sanitary quality in rural communities. [ABSTRACT FROM AUTHOR]

IntroductionRiverine forests in the Himalaya represent a biodiverse, dynamic, and complex ecosystem that offers numerous ecosystem services to local and downstream communities and also contributes to the regional carbon cycle. However, these forests have not been assessed for their contribution to dry matter dynamics and carbon flux. We studied these parameters along three classes of riverine forests in eastern Uttarakhand, dominated by Macaranga, Alnus, and Quercus-Machilus forest.MethodsUsing volume equations, we assessed tree biomass, carbon storage, and sequestration in the study area.ResultsThe total standing tree biomass in Macaranga, Alnus, and Quercus-Machilus forest ranged from 256.6 to 558.1 Mg ha−1, 460.7 to 485.8 Mg ha−1, and 508.6 to 692.1 Mg ha−1, respectively. A total of 77.6–79.6% of vegetation biomass was stored in the aboveground biomass and 20.4–22.4% in belowground plant parts across the riverine forests. The carbon stock in Macaranga forest ranged from 115.5 to 251.1 Mg ha−1, in Alnus forest from 207.3 to 218.6 Mg ha−1, and in Quercus-Machilus forest from 228.9 to 311.4 Mg ha−1. The mean annual litterfall was accounted maximum for Quercus-Machilus forest (5.94 ± 0.54 Mg ha−1 yr.−1), followed by Alnus (5.57 ± 0.31 Mg ha−1 yr.−1) and Macaranga forest (4.67 ± 0.39 Mg ha−1 yr.−1). The highest value of litterfall was recorded during summer (3.40 ± 0.01 Mg ha−1 yr.−1) and the lowest in winter (0.74 ± 0.01 Mg ha−1 yr.−1). The mean value of net primary productivity and carbon sequestration was estimated to be highest in Quercus-Machilus forest (15.8 ± 0.9 Mg ha−1 yr.−1 and 7.1 ± 0.9 Mg C ha−1 yr.−1, respectively) and lowest in Alnus forest (13.9 ± 0.3 Mg ha−1 yr.−1 and 6.1 ± 0.3 Mg C ha−1 yr.−1, respectively).DiscussionThe results highlight that riverine forests play a critical role in providing a large sink for atmospheric CO2. To improve sustainable ecosystem services and climate change mitigation, riverine forests must be effectively managed and conserved in the region.

More than just selling, a city must be constructed as an image formation process, which is formed from a mental map created by local people that produces an original identity to make a good branding. This research aims to reveal a new element of city identity and produce a mapping process of forming a strong city identity based on the advantages of the city that can be used in perfecting the concept of city branding. The result shows that the natural appearance in this study refers to the appearance of the river and the surrounding area called “RIVERINE” which means the area around the river. These elements also become the identity of Palembang and can be one of the elements to construct a concept of city branding. The research’s state-of-the-art findings are the new element to constructing the city identity of Palembang by revealing the role of the new element of city identity construction.

Microbial analysis has become one of the most critical areas in aquatic ecology and a crucial component for assessing the contribution of microbes in food web dynamics and biogeochemical processes. Initial research was focused on estimating the abundance and distribution of the microbes using microscopy and culture-based analysis, which are undoubtedly complex tasks. Over the past few decades, microbiologists have endeavored to apply and extend molecular techniques to address pertinent questions related to the function and metabolism of microbes in aquatic ecology. Metagenomics analysis has revolutionized aquatic ecology studies involving the investigation of the genome of a mixed community of organisms in an ecosystem to identify microorganisms, their functionality, and the discovery of novel proteins. This review discusses the metagenomics analysis of bacterial diversity in and around different aquatic systems in India. [ABSTRACT FROM AUTHOR]

Accessibility of Potable water in rural and riverine communities have reduced drastically in recent times. A total of six borehole water samples and a freshwater sample were obtained from Okerenkoko community in Delta State, Nigeria. The water samples were analyzed for physicochemical and microbiological parameters using standard procedures. Pearson correlational analysis was employed to evaluate the level of association of the data using Statistical Package for Social Sciences version 23. Our results showed that pH concentration values ranged from 5.62 to 7.81, electrical conductivity had 10.03 to 490.01 µS/cm, dissolved oxygen varied from 3.90 to 7.91 mg/L, COD had 10.01 to 50.03 mg/L. The fecal coliform count ranged from 4-2400 MPN/ml, while the surface water had a fecal coliform count 2400 MPN/ml; fungal count 3.1 Log10CFU/ml and 3.6 Log10CFU/ml respectively, Total aerobic count had a maximal concentration value of 5.8 Log10CFU/ml and 5.4 Log10CFU/ml; Total Salmonella Shigella Count it had a concentration of 4.0 Log10CFU/ml. Microbes associated with the water samples were Bacillus sp., Escherichia sp., Staphylococcus sp., Streptococcus sp., Shigella sp., Proteus sp., Pseudomonas sp., Klebsiella sp., Vibrio sp. and Micrococcus sp. There is an urgent need to source-track the trajectory of pollutants from both from domestic and industrial activities. There is need that the government at all levels should improve the available potable water resources in Okerenkoko community. [ABSTRACT FROM AUTHOR]

Summary: The little-known Bristled Grassbird Chaetornis striata is thought to be declining due to the loss of grassland habitats throughout its range, and is currently classified as globally 'Vulnerable'. In order to investigate the current status and possible causes of the presumed decline, we assessed population density of Bristled Grassbird in Padma and Jamuna river systems of Bangladesh. The study was conducted during the breeding seasons of the Bristled Grassbird in April and May in 2016–2019, using distance sampling and habitat suitability modelling. We also examined habitat preferences and responses to environmental changes based on vegetation structure and habitat modifications at point count locations. We detected a total of 39 birds with a mean group size of 1.44 individuals. We estimated 4.52 (95% CI: 2.65–7.73) individuals per km2 with an encounter rate of 1.48 detections per point count station and 341.15 birds within the study area. Our habitat suitability model projected a total of 167.41 km2 of suitable habitat and a total of 756.7 birds in floodplain grasslands of Padma and Jamuna river systems. The Bristled Grassbird was positively associated with grass height and grass density with 92.31% of 39 detections at Saccharum spontaneum dominated grasslands. We did not find a significant effect on Bristled Grassbird detections with increasing human activities, although the detection rate decreased linearly with increasing agricultural intervention and grass harvesting. These findings indicate that the Bristled Grassbird is more widely distributed throughout Bangladesh, and may be less vulnerable to grassland modifications, than previously thought. [ABSTRACT FROM AUTHOR]

Adequate water, sanitation, and hygiene in schools are vital to achieving conducive learning and well-being of pupils. The study assessed WaSH conditions in Riverine primary schools in Ojo Area of Lagos, Nigeria. The study employed field observation and administration of questionnaires to 256 pupils using purposive sampling techniques to obtain information on WaSH facilities in private and public primary schools. The data were analysed using descriptive and Chi-square statistics while the study area map and WaSH attributes were plotted using ArcMap and Excel software respectively. The results show that 92.7% of the pupils from the public school are acquainted with WaSH. Most of the schools have adequate water and handwashing facilities. The ratio of boys and girls to toilet facilities exceeded UNICEF standard while learning material on WaSH program was generally poor. The greater percentage of the pupils from public schools indicate their satisfaction with accessibility and the quality of service derived from WaSH facilities while the adequacy of WaSH facilities was rated below average. The majority of the pupils affirmed that adequate WaSH provisions will improve their academic performance. The test statistics show a significant relationship between WaSH attributes, academic performance, and the school type. The study serves as baseline information for policymakers and school management authorities for interventions in areas of greatest WASH needs. We concluded that private schools indicate some deprivation in WaSH conditions. We recommended adequate learning aids on WaSH, toilets, handwashing materials, and waste bins for optimum academic performance and well-being of the pupils with greater priority in the private schools.

The Philippines are projected to be a top contributor to oceanic plastic pollution by 2025, ranking first globally for riverine plastic emissions. However, comprehensive empirical data on litter leakage is lacking, impeding accurate estimates and mitigation efforts. We conducted the first thorough assessment of plastic within a 100 km radius of Davao City, Mindanao, Philippines using a stratified random sampling design. We detected 13,970 debris items across 309 transects from 33 coastal, 27 river, and 44 inland sites, and collected 1405 debris items from 27 sea surface trawls. Riverbanks showed the highest plastic pollution densities, averaging 3.6 items per m2. Food wrappers and labels, both whole and fragmented, were the most abundant items across all site types, highlighting the Filipino "tingi" culture of buying and trading in small quantities. We recommend focusing on river hotspots and commonly reported items, particularly food packaging and sachets, to manage plastic pollution effectively. [Display omitted] • First extensive assessment of plastic pollution in the Philippines. • Food packaging and labels dominate litter except on sea surfaces. • Riverbanks have the highest debris density. • Tingi culture and single-use packaging significantly contribute to plastic waste. [ABSTRACT FROM AUTHOR]

This study investigated the spatio-temporal variability of microplastics (MPs) in the sediments of the River Thames (UK) catchment over 30 months (July 2019 – Dec 2021). The average MP concentration was 61 items kg−1 d.w., with fragments <1 mm being dominant and polyethylene (PE) the most common polymer. Adjacent land use influenced MP concentrations and types, with industrial sites showing particularly high levels and a prevalence of small beads and industrial polymers. MP concentrations generally decreased after higher winter flows, likely due to sediment rearrangement or winnowing. This study describes the seasonal concentrations and characteristics of MPs present in sediment from the River Thames catchment, and attempts to identify their likely origin. Further, the study provides new insights into the mobility and fate of MPs in riverine settings under varying flow conditions, which is vital given the predicted increases in flooding under various global heating scenarios. [Display omitted] • Microplastics were pervasive across the catchment; • Microplastic concentrations generally decreased under high flows; • Land use determined microplastic abundance, shape, size and composition. [ABSTRACT FROM AUTHOR]

Jatigede Reservoir is stagnant inland water formed from the damming of the Cimanuk river. Jatigede Reservoir, like any other reservoir, is horizontally divided into three areas, namely riverine, transition, and lacustrine. The different characteristics of each zone also impact the composition and community of phytoplankton, trophic status, and carbon content. This study aims to calculate the carbon content of phytoplankton in the waters of the Jatigede Reservoir in each zone with the composition and community of phytoplankton at a certain trophic status. The research stations were selected using purposive sampling with station selection based on the site in the reservoir, namely riverine, transition, and lacustrine. Analysis of trophic status and carbon content was used to determine the condition and presence of carbon in the Jatiged Reservoir. The trophic position of the Jatigede Reservoir based on the Nygaard Index and TSI (Tropic State Index) is categorized into the eutrophic level. Species from the Cyanophyceae class tend to have high abundances, but the higher carbon content is in the Dinophyceae class. Riverin, transitional, and lacustrine zoning have the same trophic status but have different compositions and phytoplankton communities. Based on the study results, the carbon content of phytoplankton was relatively high in the riverine and lacustrine zones and low in the transition zone. [ABSTRACT FROM AUTHOR]

The study was concluded in riverine flora of different rivulets 'Kheeree Rau', 'Semal Rau', 'Pathar Rau', 'Mohan Rau of the river Hindon have been worked out on plant species diversity in sesanol riverine tract of subtropical of shivalick range. The study is restricted to 50 m from either side of the Rau. A total of 152 plant species belonging to 152 genera and 54 families are recorded from the study area of the right bank. A total of 125 plant species belonging to 125 genera and 47 families are recorded in the study area of left bank Herbs appear to be dominant with 132 (69.9%) species followed by shrubs 37 (19.7%) species and 14 (7.3%) tree species and 06 (3.1%) climber species. Herbs appear to be dominant with 112 (72.9%) species followed by shrubs 25 (17.7%) species and 11 (6.3%) tree species and 04 (4.1%) climber species in the left bank. The biological spectrum reveals that the vegetation of the area is thermophanerophytic. Therophytes represent the highest (50.3%) lifeforms followed by Phenerophytes (29.0%) and Hemicryptophytes (8.3%). The highest percentage of therophytes in the area may be due to low soil cover, low moisture due to sandy soil and favourable period (rainy season) for annual growth. [ABSTRACT FROM AUTHOR]

Climate change has emerged as a key threat to biodiversity, leading to broad-scale shifts in distributions of marine and terrestrial species as they attempt to track thermally suitable habitat. By contrast, our understanding of climate responses of freshwater species is relatively undeveloped, limiting our knowledge of whether projected warming will lead to freshwater biodiversity loss. Here, we linked a multicontinental database of riverine fish population abundance time series collected from 1958 to 2019 to temperature data from the same period. Across the sampled localities, waters warmed by 0.21 °C per decade (annual maximum of monthly temperatures). We tested whether fish responded to this change by i) increasing abundance at the cooler poleward limit of species distributions-predicted if warming has opened new opportunities-and ii) decreasing abundance toward the equatorward limit of distributions-predicted if temperatures have exceeded tolerance thresholds. We found that observed population trends were consistent with both of these expected patterns from climatic warming and that the trends were more pronounced in time series covering the longer time periods of 30+ y. The responses consistent with climate change were most evident in species with larger body sizes, higher trophic levels, river-sea migratory behavior, and more widespread distributions. Moreover, positive abundance responses to warming were more likely at higher altitudes where conditions tend to be cooler. These findings indicate that projected future warming will likely lead to widespread shifts in riverine community structure, including abundance declines at the trailing edge of species distributions., Competing Interests: Competing interests statement:The authors declare no competing interest.

Introduction: The traditional communities of the Brazilian Amazon possess significant knowledge regarding the huge therapeutic arsenal available from natural sources that can be used to care for their health problems. This study aimed to identify, map and synthesize the scientific evidence on the use of traditional medicine as a therapeutic resource when used by traditional communities of the Brazilian Amazon., Methods: This is a scoping review, which is a method used to map the main concepts of a research area, the available evidence and its sources. It is developed in five steps: (1) identification of the research question; (2) identification of relevant studies; (3) selection of studies; (4) data analysis; and (5) grouping, synthesis and presentation of data., Results: Medicinal plants, vertebrates and invertebrates, among other medicinal products, are elements that are widely used by traditional populations. Plant stems, bark, leaves, flowers, fruits, seeds, roots, tubers and even the whole plant are prepared in various forms, such as teas, infusions, smoke for rituals, baths, macerations, oils, ointments, concoctions, dressings, incenses and exfoliants, among others. The main structures and forms used from animals are lards, fats, viscera, horns, cocoons, nests, feathers and beaks of birds, eggs and roes. These therapeutic practices are often carried out using endogenous, wild and domesticated natural resources present in the biodiverse environments of traditional populations. They involve magical-religious beliefs to treat all types of illnesses, including cultural syndromes that affect children, young people, adults and the elderly., Conclusion: This scoping review has an important role to disseminate and expand the discussion of traditional medicine practices, inviting readers - whether they are health professionals, community members, managers or decision-makers - to a continuing debate using an intercultural dialogue necessary to improve approaches. From this perspective, it is essential to consider the comprehensive legal and legal framework that guides the public policies of national health systems.

In this paper we analyze data from 110 sites in Elmore and Gooding counties which are part of the SHPO database and from recent surveys on the OCTC near Boise. We hypothesize that pottery is likely to be found in locations outside of lowland settings and at elevations below 1500 meters in greater numbers than expected. Expectations mirror those of the earlier Southwest Idaho Ceramic Project but document the presence of pottery in other locations. [ABSTRACT FROM AUTHOR]

This study determined the distribution of selected trace metals (Cu, Cd, Zn and Pb) in the dissolved (<0.45 µm) and particulate (>0.45 µm) samples at Sungai Buloh river, Malaysia. The dissolved Zn, Cd, Cu and Pb concentration along the river was in the safety range. The dissolved and particulate Zn, Pb, Cu and Cd concentration was measured and recorded. We found that most of the metals exist in the particulate form and a consistent distribution coefficient (KD) value indicated a low metals deposition occurred along the river. Therefore, it could suggest that most of the anthropogenic input in the upper stream was transported along the river and it might deposited at the estuarine of the river, which could affect the safety level of these metals at the surface sediment and in the aquatic organisms in the study area. [ABSTRACT FROM AUTHOR]

Inspired by one of the themes of the "Boundaries and Bonds: An International Conference on Chinese Diaspora," hosted by Nanyang Technological University in October 2021, this article explores conceptual boundaries in the study of Cantonese migration during the pivotal nineteenth century. Based on research on internal Cantonese migration along the West River, but set in a comparative framework of overseas Cantonese migration, I consider in turn natural or topographical barriers, political boundaries, regional and class discrepancies, and gendered imaginings and practices of migration. Focusing on villages and townships along the West River, I show that emigrant communities with prior access to a long, navigable, and commercially important river readily adapted to new experiences of overseas migration after the mid-nineteenth century. 摘要: 受到 2021 年 10 月由南洋理工大学主办的"界线与连线: 华侨华人研究国际学术研讨会"的议题的启发，本文对研究 19 世纪这个关键时期的广府移民的概念性的界线作一探讨。以西江流域的内部广府移民为核心，基于海外广府移民的比较性构思，我将考察自然和地形障碍、政治界限、地域以及阶级的差异、性别化的想象和移民实践。此文以西江流域的村庄和乡镇为主，展示对一条悠长、可通航的、商业上有重要价值的河脉有着便利通行的外出移民群体在19世纪中叶之后轻而易举地适应了向海外移民这样的新实践。 [ABSTRACT FROM AUTHOR]

The study investigated the infection level and behavioural factors exposing rural inhabitants to urogenital schistosomiasis in Takum Local Government Area, Taraba State, Nigeria. Filtration technique determined Schistosoma haematobium eggs from urine samples. Questionnaires collected socio-demographic characteristics and ponds/rivers/streams’ behavioural attitudes of participants. An infection of 41.1% was found. Sufa significantly had the highest infection (62.5%) (χ2 = 32.34, p = 0.001) as well as the age groups 1–10 years (47.2%) and 11–20 years (49.6%) (χ2 = 33.83, p = 0.001). Participants with non-formal education and farmers, respectively, had higher infection (45.7%) (χ2 = 12.08, p = 0.001) and (48.5%) (χ2 = 5.42, p = 0.020). Inhabitants who played in ponds/rivers/streams during dry season as well as those with non-formal education and farmers were more predisposed to infection with respective crude odds ratio (cOR) of 0.92 (%95CI: 0.81–1.50; p = 0.043), 0.55 (%95CI: 0.38–0.77; p = 0.001) and 0.80 (%95CI: 0.33–1.41; p = 0.002). Inhabitants were infected according to their wards as well as their age groups, education level, occupation level and behavioural activities. The federal and state governments should embark on public health education and control of the disease. HIGHLIGHTS First epidemiological study in Takum Local Government reporting the vulnerabilty of rural inhabitants to river and pond water sources.; Water activities like farming of rice, playing and washing in ponds/streams/rivers exposed inhabitants to urogenital schistosomiasis.; Deterioration of bore-holes and absence of pipe-borne potable water motivated and mandated rural inhabitants to riverine and pond activities.;

Jatigede Reservoir is stagnant inland water formed from the damming of the Cimanuk river. Jatigede Reservoir, like any other reservoir, is horizontally divided into three areas, namely riverine, transition, and lacustrine. The different characteristics of each zone also impact the composition and community of phytoplankton, trophic status, and carbon content. This study aims to calculate the carbon content of phytoplankton in the waters of the Jatigede Reservoir in each zone with the composition and community of phytoplankton at a certain trophic status. The research stations were selected using purposive sampling with station selection based on the site in the reservoir, namely riverine, transition, and lacustrine. Analysis of trophic status and carbon content was used to determine the condition and presence of carbon in the Jatiged Reservoir. The trophic position of the Jatigede Reservoir based on the Nygaard Index and TSI (Tropic State Index) is categorized into the eutrophic level. Species from the Cyanophyceae class tend to have high abundances, but the higher carbon content is in the Dinophyceae class. Riverin, transitional, and lacustrine zoning have the same trophic status but have different compositions and phytoplankton communities. Based on the study results, the carbon content of phytoplankton was relatively high in the riverine and lacustrine zones and low in the transition zone.

This study presents the first comprehensive analysis of anthropogenic debris on the riverbanks of the Ciliwung River, covering upstream to downstream areas. The mean of debris found in each measurement was 32.79 ± 15.38 items/m2 with a weight of 106.00 ± 50.23 g/m2. Plastic debris accounted for over 50 % of all litter items identified and represents 55 % by weight, signifying a significantly high prevalence compared to global studies examining litter along riverbanks. The majority of the plastics found originated from Single-use applications and were predominantly made from Styrofoam. This investigation demonstrated the importance of actions to reduce single use applications and to improve waste management strategies. This can be achieved through proactive initiatives coupled with adaptable approaches, such as implementing effective urban planning and enhancing waste collection capacity. • Macro litter on riverbanks remains largely understudied in Global South. • Litter is more abundant upstream than downstream. • Riverbank litter observed was up to 30 times greater than global research. • Macro litter accumulates in regions with limited waste management practices. • 4.95–18.82 tons of litter could be carried from the Ciliwung Riverbank into the sea. [ABSTRACT FROM AUTHOR]

Adequate water, sanitation, and hygiene in schools are vital to achieving conducive learning and well-being of pupils. The study assessed WaSH conditions in Riverine primary schools in Ojo Area of Lagos, Nigeria. The study employed field observation and administration of questionnaires to 256 pupils using purposive sampling techniques to obtain information on WaSH facilities in private and public primary schools. The data were analysed using descriptive and Chisquare statistics while the study area map and WaSH attributes were plotted using ArcMap and Excel software respectively. The results show that 92.7% of the pupils from the public school are acquainted with WaSH. Most of the schools have adequate water and handwashing facilities. The ratio of boys and girls to toilet facilities exceeded UNICEF standard while learning material on WaSH program was generally poor. The greater percentage of the pupils from public schools indicate their satisfaction with accessibility and the quality of service derived from WaSH facilities while the adequacy of WaSH facilities was rated below average. The majority of the pupils affirmed that adequate WaSH provisions will improve their academic performance. The test statistics show a significant relationship between WaSH attributes, academic performance, and the school type. The study serves as baseline information for policymakers and school management authorities for interventions in areas of greatest WASH needs. We concluded that private schools indicate some deprivation in WaSH conditions. We recommended adequate learning aids on WaSH, toilets, handwashing materials, and waste bins for optimum academic performance and well-being of the pupils with greater priority in the private schools. [ABSTRACT FROM AUTHOR]

Background: The riverine islanders of Brahmaputra (Assam, India) are among the most economically backward population group of Assam. Recurring floods results in eclectic damage affecting their everyday lives. Medical Relief is limited due to vast water body, which pose a challenge in providing and accessing health services with limited or no provision for oral health services. Objectives: Planning and implementing a program for delivery of dental services on an already existing model of 'Boat Clinics' in Assam, India. Setting and Design: Isolated riverine islands of Brahmaputra River in North eastern State of Assam, India. Materials and Methods: A service model was designed to implement and provide dental services on an already existing model of 'Boat Clinics' in Assam. Dentals services were provided via two dental units installed (in March 2016) in two different boats on a trial basis. Situation analysis of the setting was done prior to implementation. Challenges encountered were overcome using alternative strategy. Results: Situation analysis revealed dental caries affecting about 59.8 percent of the islanders (DMFT=3). The number of beneficiaries almost doubled from 2016. More than 750 islanders have been treated in 2017 from one 'boat dental clinic'. Women seem to utilize oral health services more than men and extraction was preferred over restoration. The main challenge had been the unavailability of full time dentists, auxillary dental personnel and management of complex dental cases. Discussion: Boat Dental Clinic Program is in accordance with objectives of National Oral Health Program. Corporate social Responsibility is excellent option that provide resources instrumental in initiating projects and more importantly sustaining them. Public Private Not for Profit Partnership (PPNP) is another way to bridge the disparity in the present setting having a downstream effect at the grass root level.

The species diversity of the genera Mononchus Bastian, 1865 and Coomansus Jairajpuri & Khan, 1977 was assessed in a study of the mononchid nematodes from a wide range of riparian habitats in Bulgaria. Four species were identified based on morphological and morphometric data: Coomansusparvus (de Man, 1880), Mononchustruncatus Bastian, 1865, Mononchuspseudoaquaticus sp. nov. , and Mononchus sp. The first three species were characterised both morphologically and molecularly (18S and 28S rRNA gene sequences) and the integration of these data and phylogenetic analyses provided support for their distinct species status. This paper provides detailed descriptions, morphometric data for multiple species populations, drawings and photomicrographs, and the first taxonomically verified sequences for C.parvus ( n = 6), M.truncatus (sensu stricto) ( n = 4) and M.pseudoaquaticus sp. nov. ( n = 3). Comparative sequence and phylogenetic analyses suggested that the utility of the 18S rRNA gene for species delimitation is rather limited at least for some species complexes within the genus Mononchus . At the generic and suprageneric level, the 18S and 28S rDNA phylogenies both recovered the three genera represented by two or more species ( Mononchus , Mylonchulus , and Parkellus ) as monophyletic with strong support, the Mononchidae as paraphyletic, the Anatonchidae as monophyletic, and there was no support for a sister-group relationship between Mylonchulus and Mononchus . A key to the species of Mononchus is provided to facilitate the identification of the currently recognised 31 species., Competing Interests: The authors declare that they have no competing interests., (Stela Altash, Aneta Kostadinova, Vlada Peneva.)

Podostemum ceratophyllum (Hornleaf riverweed) is a macrophyte that inhabits swift-water rivers with stable substrates and abundant light in montane and piedmont ecoregions of eastern North America. Within these habitats, P. ceratophyllum is considered a foundation species because the plant can strongly influence community structure by increasing habitat complexity for macroinvertebrates and fishes, and facilitates resources cycling via elemental sequestration, herbivory, and detrital pathways. Currently, the USDA and NatureServe recognize P. ceratophyllum as a conservation concern in some states, but the plant's status remains uncertain in many other states. In West Virginia, P. ceratophyllum is considered imperiled (S2) by the West Virginia Natural Heritage Program. The most recent records were collected in 1998, while other populations have not been confirmed since the late 1800s. To expand our current understanding of the distribution of P. ceratophyllum in West Virginia, we surveyed six historical sites and 34 new sites between 2015-2019. Four historical sites were found to still support P. ceratophyllum, and 10 new populations were discovered in six different river systems; however, P. ceratophyllum was not found at 26 other sites surveyed. Identifying new populations of P. ceratophyllum and resurveying previously documented populations in West Virginia expands the ecological and botanical understanding of this notably underreported plant. Improved documentation of P. ceratophyllum in West Virginia may benefit river management and restoration efforts in the state and provide insight into the plant's sensitivity to anthropogenic disturbances. [ABSTRACT FROM AUTHOR]

The construction of Belo Monte Hydropower dam has resettled riverine communities from their homes to the outskirts of the city of Altamira, kilometres away and disconnected from the river. Resettlement can be a threat to both women and men’s adaptation in the new environment, whereas the lack of in-depth studies regarding gender policies and local traditional communities can create even more obstacles for women. The disconnection that stems the resettlement from these individuals has resulted in the loss of their spatial identity and livelihood. This situation caused local traditional people to share resettlement units with city dwellers, thereby jeopardising their traditions and distancing them from both the river and their livelihood.