Environmental Monitoring and Assessment最新文献

{"title":"Incidence and effects of anomalies and hybridization on Alabama freshwater fish index of biotic integrity results","authors":"Justin C. Bagley,&nbsp;Alicia K. Phillips,&nbsp;Sarah Buchanon,&nbsp;Patrick E. O’Neil,&nbsp;Elizabeth S. Huff","doi":"10.1007/s10661-024-13512-2","DOIUrl":"10.1007/s10661-024-13512-2","url":null,"abstract":"<div><p>The index of biotic integrity (IBI) is an effective multi-metric tool for assessing biological integrity of aquatic ecosystems and regulating water quality based on fish community surveys. Percentages of individuals with deformity, eroded fin, lesion, and tumor (DELT) anomalies are used in IBIs as a measure of fish health, while the percentage of hybrids reflects changes in reproductive isolation. When rare, these are combined into a joint ‘% DELT + hybrids’ metric. We investigated the distribution and effects of this metric on overall fish IBI scores and biological condition ratings by analyzing data from 646 fish surveys from across Alabama. Following exploratory data analyses, we assessed the impacts of % DELT + hybrids by comparing IBI scores for sites before and after setting this metric to zero to simulate systematic error (no detection). While DELTs and other anomalies were infrequent (~ 11% of sites), the two most commonly diseased fish species were <i>Campostoma oligolepis</i> (Leuciscidae) and <i>Lepomis cyanellus</i> (Centrarchidae). Hybrids were less frequent (~ 7% of sites) than anomalies and were scored only for <i>Lepomis</i> sunfishes. Overall, we found no statistically significant differences in final IBI scores or biological condition ratings before and after anomaly and hybrid removal; however, removal led to increased IBI scores and biological condition ratings in 13.2% and ~ 6% of surveys, respectively. These findings demonstrate that, while IBI outcomes appear relatively robust to systematic error in % DELT + hybrids, anomaly and hybrid observations can alter IBI outcomes, with important implications for fish-based bioassessments and water quality management.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Independent and compound characteristics of PM2.5, ozone, and extreme heat pollution events in Korea","authors":"Yumeng Qiu,&nbsp;Libang Ma,&nbsp;Tianzhen Ju","doi":"10.1007/s10661-024-13485-2","DOIUrl":"10.1007/s10661-024-13485-2","url":null,"abstract":"<div><p>In the context of global warming and rapid urbanization, the frequency of simultaneous occurrence of extreme high temperature, ozone pollution, and particulate matter pollution has increased. However, independent and composite characterization of PM_2.5, ozone, and extreme heat pollution events has not been systematically analyzed so far. This study combines meteorological and pollutant data with the GTWR model in an attempt to reveal the patterns of independent heat days (IHD), compound PM_2.5-ozone pollution (CPOP), and composite heat-PM_2.5-ozone pollution (CHPOP). In this study, we found that in July and August in South Korea, the frequency of CPOP events, the frequency of CHPOP events, and the composite proportion of CHPOP events all show an overall pattern of east-high and west-low; the atmospheric circulation patterns of the three extreme events have brought about more stagnation conditions, which may be related to cyclone activity; the occurrence of CPOP events is mainly accompanied by a continuous decrease in relative humidity and cloud cover, both IHD and CHPOP events occur with increasing temperatures, decreasing cloudiness, and anomalously high pressures; under the same events, excluding relative humidity, PM_2.5 and ozone showed similar conditions with respect to the dependence on temperature, wind speed, barometric pressure, cloudiness, and nitrogen dioxide. This study identified the independent and composite characteristics of PM_2.5, ozone, and extreme heat pollution events, which can enhance early prediction and pollution prevention of these extreme events.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of surface-groundwater interactions on nutrient dynamics in urban in-channel treatment systems.","authors":"Fabio C Silveira, Thomas A Cochrane, Ricardo Bello-Mendoza, Frances Charters","doi":"10.1007/s10661-024-13459-4","DOIUrl":"https://doi.org/10.1007/s10661-024-13459-4","url":null,"abstract":"<p><p>In-channel water treatment systems remove excess nutrients through biological, chemical, and physical processes associated with the hyporheic zone. However, the impact of surface and groundwater interactions on these treatment processes is poorly understood. This research aims to assess the influence of varying groundwater conditions (neutral, drainage water, and groundwater seepage) and different bed sediment hydraulic conductivities on nitrogen and phosphorus dynamics in in-channel treatment systems. A flume containing bed sediment was used to study changes in surface water quality under different groundwater and bed sediment conditions. Compared to inlet and outlet concentrations, dissolved reactive phosphorus (DRP) and ammoniacal nitrogen (NH₄-N) levels in the surface water increased by 11-65% and 10-51%, respectively, while nitrate (NO₃-N) concentrations decreased by 11% under groundwater seepage conditions. The increase in NH₄-N was due to ammonification, while the decrease in NO₃-N was due to denitrification and mixing and dilution with the groundwater. The upward groundwater flux through the bed sediment transported both DRP and NH₄-N into the surface water. Low hydraulic (LH) conductivity sediment led to greater changes in nutrient concentration than high hydraulic (HH) conductivity sediment (DRP increased by 65% and NH₄-N by 51% for LH, compared to 11% and 10% for HH, respectively). However, HH conductivity sediment led to greater variations in pH and Eh values. The findings could assist the design and monitoring of in-channel treatment systems where groundwater and surface water interact.</p>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":"51"},"PeriodicalIF":2.9,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142805714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of organic pollutants from paper mill effluent using Taro (Colocasia esculenta L. Schott) in an electro-assisted horizontal subsurface flow constructed wetland: Experimental and kinetic studies","authors":"Sheetal Rani,&nbsp;Pankaj Kumar,&nbsp;Vinod Kumar","doi":"10.1007/s10661-024-13523-z","DOIUrl":"10.1007/s10661-024-13523-z","url":null,"abstract":"<div><p>In this study, the phytoremediation potential of Taro (<i>Colocasia esculenta</i> L. Schott) plant was examined, utilizing horizontal subsurface flow constructed wetlands with and without an electric current supply for the purpose of removing pollutants from paper mill effluent. For this, different wetlands were set up with varying concentrations of effluent: CW (Control), CW1 (25%), CW2 (50%), CW3 (75%), CW4 (100%). After 45 days, the highest plant height (85.13 ± 4.24 cm), leaf area index( 250.83 ± 10.14), fresh biomass (565.30 ± 6 .10 g), root biomass (392.85 ± 4.34 g), root-to-shoot ratio (2.41 ± 2.10), relative growth rate (0.044 ± 0.002 gg⁻¹d⁻¹), and chlorophyll content (3.29 ± 0.07 mg/g fwt) was observed in CW2 with current supply, along with significant removal of pollutants (pH: 7.13 ± 0.15, EC: 2.33 ± 0.07 dS/m, TDS: 192.52 ± 6.12 mg/L, COD: 490.17 ± 5.01 mg/L, BOD: 206.74 ± 5.92 mg/L, potassium: 73.27 ± 4.11 mg/L, sodium: 46.62 ± 2.27 mg/L, phosphate phosphorus: 34.08 ± 1.43 mg/L, and nitrate nitrogen: 104.85 ± 5.94 mg/L) and highest first-order rate constant (k) values. Furthermore, the microbial community assessment of constructed wetlands using V3-V4 16S rRNA sequence data was prepared on the Illumina MiSeq framework. The major phyla identified were <i>Proteobacteria, Firmicutes, Bacteroidetes, Actinobacteria, Chloroflexi, Acidobacteria, Nitrospirae, Planctomycetes,</i> and others. The findings offer innovative insights for sustainable wastewater treatment strategies through phytoremediation of paper mill effluent using Taro plants in modified constructed wetlands and highlight the role of diverse microbial communities capable of degrading various pollutants in wastewater.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic trends in land surface temperature and land use/land cover transitions in semi-arid metropolitan city, Jaipur","authors":"Neha Khajuria,&nbsp;S. P. Kaushik","doi":"10.1007/s10661-024-13370-y","DOIUrl":"10.1007/s10661-024-13370-y","url":null,"abstract":"<div><p>The increasing surface heat in metropolitan areas is one of the biggest issues, especially as natural surfaces are being replaced by impermeable concrete surfaces. This study uses Landsat data (1991–2022) to examine the spatio-temporal dynamics of LST and LULC in Jaipur, highlighting the impact of urban expansion and the city's semi-arid nature on the thermal landscape. We have used the maximum likelihood classifier for supervised LULC classification and the mono-window algorithm for retrieving LST. The evaluation is done using buffer analysis. Furthermore, to assess the interrelationship between LST and LULC indices (NDVI &amp; NDBI), regression analysis is used. The CA-ANN model is employed to project LSTs of 2032 and 2042. The findings indicate that the built-up land in the study area grew by 52.80% from 1991–2022. Most of this expansion has come at the expense of agriculture/open land, and vegetation cover. The mean LST in the city has risen by 5.9 °C, with the inner zone (B1) increasing from 35.44 °C to 41.93 °C, indicating urbanisation-induced heat stress. In the outer zones (B5-B6), dry sandy and rocky soils contribute to elevated temperatures. Water bodies show the lowest LST, while open and barren lands have the highest. LST exhibit a positive correlation with NDBI and a weak negative correlation with NDVI. Predictions indicate that by 2042, about 99% of the urban landscape will encounter surface temperatures above 40 °C, with 28.79% exceeding 45 °C. Raised temperatures could exacerbate the UHI effect, leading to serious health and environmental concerns.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utilization of agrowaste for arsenic biosorption: enhancing efficacy and assessing the suitability of plant and animal growth in post-adsorbed solution","authors":"Malaya Ghosh,&nbsp;Sarbani Giri,&nbsp;Pubali Dey,&nbsp;Abhijit Mandal","doi":"10.1007/s10661-024-13520-2","DOIUrl":"10.1007/s10661-024-13520-2","url":null,"abstract":"<div><p>Arsenic is known to have detrimental effects on living bodies when exposed to contaminated groundwater. Therefore, a cost-effective way to eliminate arsenic from aquatic sources is essential. Our study evaluated the efficacy of eight different types of easily accessible agricultural wastes for arsenic removal. The safety assessment of the post-adsorbed solution in plant and animal test models such as <i>Allium cepa</i> and <i>Daphnia magna</i> was also evaluated. The results showed that the efficiency of the adsorbents depends on the type of agricultural waste utilized. In the case of citrus agrowastes, maximum biosorption (94–95%) was attained at the lowest 15 min contact time, indicating very rapid saturation of adsorption sites for other adsorbents; with an increase of contact time, there was a gradual increase in biosorption of arsenic. <i>Allium cepa</i> toxicity test showed that arsenic exposure caused a significant decrease in root length (2.80 ± 0.89 cm) and a reduction in mitotic index (6.31 ± 1.79%) that can be reverted to normal after the roots were grown in a post-adsorbed medium. Similarly, solutions treated with different agricultural wastes except citrus biosorbents showed significantly higher survival rates and litter sizes of <i>Daphnia magna</i> post biosorption. Agricultural waste with citric characteristics removed arsenic more effectively than other chosen agricultural wastes, but the solution generated by biosorption with citric agrowaste does not support plant and animal growth. Among the other chosen adsorbents, rice husk has been found to be highly suitable for plant and animal growth by reducing the toxic effects of arsenic.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of contaminated snow cover using remote sensing in the Eastern Himalayas of Arunachal Pradesh, India","authors":"Manmit Kumar Singh,&nbsp;Ritu Anilkumar,&nbsp;Rishikesh Bharti","doi":"10.1007/s10661-024-13476-3","DOIUrl":"10.1007/s10661-024-13476-3","url":null,"abstract":"<div><p>Snow is considered contaminated when any foreign materials are deposited/mixed with it, which can accelerate melting and significantly impact the snow cover's radiative balance. Such an enhanced melting rate results in a reduction in freshwater sources at the catchment level. In optical remote sensing, snow contamination is widely studied using a normalizing difference index called the snow contamination index. This is based on the finding that the impact of snow contamination diminishes with wavelength and is most noticeable in the visible spectrum (0.3—0.7 μm). However, the study of snow contamination using optical remote sensing is hindered in the Himalayan terrain due to enduring cloud cover in the region. Synthetic Aperture Radar (SAR) data such as Sentinel-1 can be used to ensure all-weather monitoring of such areas. This study focuses on the SAR backscattering behavior at the C-band of clear and contaminated snow for March 2022 in a part of the Eastern Himalayas of Arunachal Pradesh, India. An attempt has been made to utilize Landsat-9 and Sentinel-1 to study the snow contamination. The SAR backscattering for snow conditions (clear/contaminated) is studied using thresholds obtained from the Landsat-9 snow cover map. The SCI and SAR backscattering statistical analysis shows a negative correlation (R² &gt; 0.6) at a 95% confidence level. It is observed that in the microwave region of the C-band, contaminated snow has a comparatively higher backscattering value than clear snow. However, in the visible wavelength, the contaminated snow has a lower reflectance value than clean snow. Such behavior of the snowpack in the microwave region of the C-band is explained using the physical properties of the snowpack and the dominant scattering mechanism over the surface. The key findings of this study suggest that SAR backscattering is affected by snow contamination due to changes in the local incidence angle, snow wetness, and surface roughness. This research provides critical insight into snow contamination using microwave remote sensing, which can be the first step toward developing an index for radar observations.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of nitrate nitrogen concentrations and DOM characteristics in groundwater from Southwest China’s Karst Wetlands using an improved GMS model","authors":"Chunjin Gong,&nbsp;Junfeng Dai,&nbsp;Zupeng Wan,&nbsp;Honghu Zeng,&nbsp;Hongyan Zhang","doi":"10.1007/s10661-024-13473-6","DOIUrl":"10.1007/s10661-024-13473-6","url":null,"abstract":"<div><p>Existing models often face limitations in the understanding and prediction of nitrate nitrogen (NO₃⁻-N) concentrations in karst groundwater. In this study, to tackle this issue, a Gaussian function model was coupled with the Groundwater Modeling System (GMS) to simulate NO₃⁻-N concentration changes in the southwest karst wetland of China. Additionally, fluorescence spectroscopy was employed to measure dissolved organic matter (DOM) components in the groundwater, providing insights into their variation and influence on NO₃⁻-N dynamics. The results demonstrated that coupling the Gaussian curve fitting method with the GMS model accurately simulated NO₃⁻-N concentration changes in the study area. The simulation revealed lower NO₃⁻-N levels in the northern region, with higher concentrations in the central area, peaking at 20.73 mg/L at lower elevations. NO₃⁻-N was primarily distributed in the southwestern region and upper Mudong Lake, exhibiting a diffusion trend from west to east. DOM analysis indicated significant autochthonous contributions, particularly microbial metabolic by-products. The total fluorescence intensity and DOM components increased downstream, with the lowest values at the source and the highest values at river confluences. The humification index (HIX) was correlated with NO₃⁻-N concentrations, where lower NO₃⁻-N levels corresponded to lower HIX values, and higher NO₃⁻-N levels corresponded to higher HIX values. In conclusion, this study provides valuable insights into NO₃⁻-N prediction in groundwater and the role of DOM, offering a reference for groundwater protection in the southwest China karst basin.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Autecology and determination of relationships between nutrients in soil and sage plant (Salvia eremophila Boiss.) in the south of Yazd province","authors":"Sara Mirahmadi Sani,&nbsp;Abbas Ahmadi,&nbsp;Seyed Zeynalabedin Hosseini,&nbsp;Nourollah Abdi,&nbsp;Hamid Toranjzar","doi":"10.1007/s10661-024-13457-6","DOIUrl":"10.1007/s10661-024-13457-6","url":null,"abstract":"<div><p>This study aims to investigate the autecology and determine the relationship between the nutritional elements in the soil and the Sage plant (<i>Salvia eremophila</i> Boiss.) in the south of Yazd province. The main habitats were determined, which contained various ecological characteristics. Total potassium (K), total nitrogen (N), total phosphorus (P), total sugar content (TSC), and proline content of the plants were determined. In addition, macro and microelement contents such as total N, extractable K, extractable magnesium (Mg), available P, available iron (Fe), and available manganese (Mn) of the study areas were determined. The highest concentrations of TSC (72.90 mg kg⁻¹ ± 3.87) and TN (0.265 g kg⁻¹ ± 0.021) of the plant, and also the highest extractable Mg (26.60 mg kg⁻¹ ± 1.70) and available Fe (0.44 mg kg⁻¹ ± 0.19), of soil were related to the Qavam Abad habitat. The highest concentrations of total K (17.495 g kg⁻¹ ± 4.91) and total P (1.206 g kg⁻¹ ± 0.257) of plants, and the highest extractable K (356.68 g kg⁻¹ ± 63.53) of soil belonged to the Tang Chenar Station. The highest TN content (6.3 g kg⁻¹ ± 1.21) of soil and the highest proline content (0.015 g kg⁻¹ ± 0.003) of plants was related to the Damgahan habitat. Also, the concentrations of soil available Mn and available P had the highest levels in the Damgahan (0.60 g kg⁻¹ ± 0.34) and Qavam Abad habitats (0.075 g kg⁻¹ ± 30.74), respectively. There was no significant difference between the amount of nutrients and soil elements in the studied stations (<i>p</i> &lt; 0.05). There was a positive and significant correlation between the amount of soil TN and plant TN (<i>P</i>_values = 0.001, <i>R</i>² = 0.87). An inverse and significant correlation was also observed between the amount of soil available P and plant total P (<i>P</i>_values = 0.014, <i>R</i>² = − 0.72). This study highlights the various environmental controls over soil’s physicochemical properties, which have significant implications for the management of soil nutrients.</p></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Presence of microplastics during high rainfall events in the Cauvery River (South India): Ecological risk and cultural practices","authors":"Jesudason Rajapandian Beulah Thavamani Estherrani,&nbsp;Sakthi Selva Lakshmi Jeyakumar,&nbsp;Johnson Princy Merlin,&nbsp;Johnraj John Christopher,&nbsp;Elangovan Rajalakshmi,&nbsp;Dhineshkumar Sivanantham,&nbsp;Francisco Rodríguez-González,&nbsp;Laura Arreola-Mendoza,&nbsp;Jonathan Muthuswamy Ponniah","doi":"10.1007/s10661-024-13421-4","DOIUrl":"10.1007/s10661-024-13421-4","url":null,"abstract":"<div><p>Rivers directly support the development of a region/country; however, globally, these aquatic regions are impacted by recent human activity. During a rainfall event, we monitored the baseline information on the spatial variability of microplastics (MPs) in the Cauvery River in South India. Forty surface water samples from two selected sites were collected between 27 September and 16 October 2022 during the commencement of monsoon which indicates 69 and 43 pieces L⁻¹ of MPs, respectively. SEM and FTIR analysis on the surface morphotypes (cracks, grooves, pits) and elemental (Si, Ti, Mg, Cu, Ta) presence/adsorption of these elements’ (in particle) surface indicates surface deformation of fibers, which is mainly due to external input/forces. Fragments of polymers establish a high degree of deterioration indicating its longer trajectory in the aquatic environment. The origin of extended fiber ranges between 631.65 and 5639.9 µm, which is being associated with laundry activities for textiles, household items, and fishing gear. Toxicity and ecological risk assessment suggest significant degree of weathered MPs due to photo-oxidation process and aging owing to exposition of intense UV light. This research serves as a strong illustration of the multiple pressures from urban development and cultural practices that have a bigger influence on the river ecosystem like Cauvery River and regular monitoring.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":544,"journal":{"name":"Environmental Monitoring and Assessment","volume":"197 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142790448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}