EcohydrologyPub Date : 2025-06-27DOI: 10.1002/eco.70052
Mohammad Sadegh Kavianpour, Pedram Attarod, Haifeng Zhu, Thomas Grant Pypker, Atefeh Dezhban, Vahid Etemad, Vilma Bayramzadeh
{"title":"Fog Precipitation Plays a Significant Role in Providing Moisture to the Caspian High Latitude Forests of Northern Iran","authors":"Mohammad Sadegh Kavianpour, Pedram Attarod, Haifeng Zhu, Thomas Grant Pypker, Atefeh Dezhban, Vahid Etemad, Vilma Bayramzadeh","doi":"10.1002/eco.70052","DOIUrl":"https://doi.org/10.1002/eco.70052","url":null,"abstract":"<div>\u0000 \u0000 <p>Fog precipitation is likely essential for the mountainous Hyrcanian forests of northern Iran, which is experiencing water stress. It is a source of moisture that is often overlooked. The impact of fog on some temperate deciduous forests, such as these Hyrcanian stands, is believed to be significant, but there are still limited quantitative assessments of this contribution. This study directly addresses this knowledge gap by quantifying fog precipitation within a pure natural stand of oriental beech (<i>Fagus orientalis</i> Lipsky) at 2000 m asl during the growing seasons (foliated periods) of 2022 and 2023. The study site had a tree density of 217 trees ha<sup>−1</sup>, mean height of 19.1 m and DBH of 41.0 cm. The site was equipped with 50 throughfall, 10 open field rainfall and 6 stemflow collectors. Rainfall and rainfall-fog events were visually separated. During the measurement period, 76 rainfall and rainfall-fog events were recorded. Rainfall-fog events accounted for 80% of all events. The cumulative amounts of rainfall and rainfall-fog events were 23.1 and 287.4 mm, respectively. Half of the events (all rainfall-fog events) exhibited negative interception. Despite having the same number of events, negative I events generated higher amounts of cumulative throughfall (238.7 mm) and stemflow (8.1 mm) and lower amount of cumulative interception value (−40.1 mm). Fog precipitation was estimated 20.3 mm in our measurement site during two leaf-out seasons. This fog capturing potential of the beech forests during the growing season was equal to roughly 100 m<sup>3</sup> ha<sup>−1</sup> per growing season. Our findings demonstrated that the Hyrcanian beech forests play a crucial role in enhancing water availability, particularly during dry periods, through effective fog capturing potential. Integrating fog water inputs into regional water resource management and forest conservation strategies is needed for ensuring the sustainability of these valuable ecosystems.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144492701","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}
EcohydrologyPub Date : 2025-06-18DOI: 10.1002/eco.70055
Zhifeng Jia, Ge Li, Cheng Jin, Jun Xing, Yingjie Chang, Pengcheng Liu, Danzi Chen
{"title":"Characteristics of Dew on Typical Plant Leaves in Loess Hill and Gully Region of China","authors":"Zhifeng Jia, Ge Li, Cheng Jin, Jun Xing, Yingjie Chang, Pengcheng Liu, Danzi Chen","doi":"10.1002/eco.70055","DOIUrl":"https://doi.org/10.1002/eco.70055","url":null,"abstract":"<div>\u0000 \u0000 <p>Dew plays an important role as a nonrainfall water input in semi-arid ecosystems. To analyse dew's variations and its influencing factors, Tribulus, Hippophae and Ulmus were selected as typical plant species because of these common plants having different leaf traits in loess hill and gully region of China. A dew monitoring method correlating manual measurements of plant leaf dew with automated sensor data was developed. During May–October 2022, the cumulative amount of dew on the foliage of the three plant species was in the following order: Tribulus (17.46 mm) > Hippophae (11.14 mm) > Ulmus (5.88 mm). Dew mainly occurred from 20:00 to 9:00 the next day and was mainly concentrated in July–October. Compared with rainfall, dew frequency is higher though the dew amount is less. Dew formation was more favourable when relative humidity at 0.2-m height was greater than 80.0%, the air temperature and dewpoint difference at 0.2-m height was less than 2°C, and the wind speed at 1.0-m height was less than 1.0 m/s. In addition, there was more dew on the first day after rainfall because of sufficient moisture. Under the same meteorological conditions, Tribulus is more prone to dew because of its dense, fine and vertical tomentum. Overall, meteorological factors significantly influenced the amount of dew condensation of the three plants. However, interspecific differences due to plant foliar characteristics were more prominent. Therefore, foliar characteristics of different plants cannot be ignored in dew studies.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314985","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":"Study on the Correlation Between the Life Cycle of Glaciers and Surrounding Grasslands: A Case of the Urumqi River Headwater Region","authors":"Boya Yan, Pei Jiang, Shuang Jin, Baojun Zhang, Qian Li, Yunsi Wu","doi":"10.1002/eco.70061","DOIUrl":"https://doi.org/10.1002/eco.70061","url":null,"abstract":"<div>\u0000 \u0000 <p>The IPCC Sixth Assessment Report shows that climate change has increased glacier mass loss, affecting nearby vegetation growth. This study focuses on the headwater region of the Urumqi River, examining how changes in Urumqi Glacier No. 1 (UG) correlate with local NDVI variations and predicting future NDVI trends. Using August remote sensing images from 1989 to 2024, we analysed the grassland growth and glacier area changes with NDVI and NDSI. Field data from UG collected in 2012 helped build an ice flow model to predict the changes in the ice volume and runoff under the SSP1-2.6 and SSP5-8.5 climate scenarios from CMIP6 models, projecting to 2100. Additionally, a multiple linear regression model analysed correlations among the runoff, temperature, land cover and NDVI. The results suggest that by 2100, under the SSP1-2.6 scenario, reduced runoff will limit the grassland growth. In contrast, under the SSP5-8.5 scenario, where precipitation and temperature are higher, vegetation is expected to remain strong. The analysis also showed that glaciers in the study area are highly sensitive to climate warming, while the grassland responds more to changes in the river runoff. This indicates that glaciers act as direct indicators of climate change and significantly shape the region's ecological environment.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314986","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}
EcohydrologyPub Date : 2025-06-10DOI: 10.1002/eco.70059
Vijay Kumar, Rejani Chandran, Ganesan Kantharajan, Lalit Kumar Tyagi, Amit Singh Bisht, Rajeev K. Singh, Uttam Kumar Sarkar
{"title":"Assessing the Impact of Flash Flood on Aquatic Habitat and Fishery Ecosystem Services of the Transboundary River Teesta in India Using GIS and Remote Sensing Tools","authors":"Vijay Kumar, Rejani Chandran, Ganesan Kantharajan, Lalit Kumar Tyagi, Amit Singh Bisht, Rajeev K. Singh, Uttam Kumar Sarkar","doi":"10.1002/eco.70059","DOIUrl":"https://doi.org/10.1002/eco.70059","url":null,"abstract":"<div>\u0000 \u0000 <p>Rivers are dynamic ecosystems with diverse habitats and offer crucial services to humankind. Anthropogenic and climatic factors, including flash floods, influence the structure and functions of this critical ecosystem. Teesta is a snow-fed transboundary river, susceptible to flooding. It originates from the Indian Himalayas and confluencing with the Brahmaputra River in Bangladesh. This study aimed to assess the impact of the recent flash flood on the physical habitat, morphometry and ecosystem services of the Teesta River, India, through a geospatial approach supplemented with systematic field surveys. The physical habitat assessment conducted during pre- and post-flash flood indicated habitat quality loss along the river, influenced by the influx of sediments, debris and displacement of rocks. The riverbed mapping of Sentinel-2 satellite imagery during pre- and post-flash flood periods revealed an expansion of the floodplain in both areas as well as an increase in width in the selected locations, with the highest increase in Tanak (138%; 0.077 to 0.184 km<sup>2</sup>) and Rangpo (150.1 to 490.28 m). The spectral indices, namely, Normalised Difference Water Index and Normalised Difference Turbidity Index, indicated reduced depth in the deep pools and increased turbidity, following the flood. This suggests impaired habitat conditions that may influence fish species distribution and abundance. Additionally, the questionnaire-based fishermen's perception survey highlights the loss of multiple ecosystem services, linked with livelihood and income generation. These results describe and interpret the impact of flash flood on habitat and ecosystem services, which would be useful information in devising strategies and policy-making for mitigating measures to sustainably manage aquatic habitats and deter negative impacts in the future.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244977","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}
EcohydrologyPub Date : 2025-06-10DOI: 10.1002/eco.70057
Yueya Chang, Jun Yang
{"title":"Artificial Intelligence Applications in River Management: Challenges and Insights From a Bibliometric Review","authors":"Yueya Chang, Jun Yang","doi":"10.1002/eco.70057","DOIUrl":"https://doi.org/10.1002/eco.70057","url":null,"abstract":"<div>\u0000 \u0000 <p>This study conducts a systematic bibliometric analysis of the applications of artificial intelligence (AI) in river management systems from 2000 to 2024. By examining 477 publications retrieved from the Web of Science Core Collection and utilizing CiteSpace for visualization, we identify key research trends, collaborative networks and emerging themes in this rapidly advancing field. The findings reveal a significant geographical concentration of research output, with China (101 papers), the United States (76 papers) and the United Kingdom (29 papers) ranking as the leading contributors. The analysis highlights an exponential increase in publications, particularly after 2020, with a primary focus on machine learning applications for water quality monitoring and real-time prediction systems. Notable institutions, including the University of Malaya, the Chinese Academy of Sciences and Duy Tan University, have demonstrated high research productivity. Moreover, critical gaps are identified, such as insufficient stakeholder engagement and the need for more transparent AI model development. These insights offer valuable guidance to environmental managers and policymakers aiming to implement AI-driven solutions for sustainable river management.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244978","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":"Water Use Dynamics of Drought-Tolerant Coniferous Trees (Pinus brutia and Cupressus sempervirens) in a Semi-Arid Environment","authors":"Hakan Djuma, Marinos Eliades, Christos Zoumides, Adriana Bruggeman","doi":"10.1002/eco.70056","DOIUrl":"https://doi.org/10.1002/eco.70056","url":null,"abstract":"<p><i>Pinus brutia</i> (pine) and <i>Cupressus sempervirens</i> (cypress) are two important forestry species in the Mediterranean region, with different strategies to cope with water stress. The overall goal of this study is to investigate ecohydrological processes of these two species. Specific objectives are (i) to quantify differences in sapflow of <i>P. brutia</i> and <i>C. sempervirens</i> trees during wet and dry seasons; (ii) to analyse effects of environmental variables on sapflow, leaf conductance (<i>gs</i>) and twig water potential (<i>Ψ</i>); and (iii) to analyse water balance components and soil water dynamics for three canopy cover conditions (under canopy, edge canopy and open area). The study site is a mixed forest in Cyprus, with an average annual rainfall of 315 mm. The site was planted in 2011 (average planting area: 30 m<sup>2</sup>). Observations of sapflow (4 trees for 24 months and 8 trees for 20 months) and soil moisture (66 sensors, 24 months) were made hourly. Soil moisture sensors were installed in three canopy cover conditions, each at 10-, 30- and 50-cm soil depths. The sapflow over the canopy area of the trees during the November 2020 to June 2022 period was 642 mm for cypress and 314 mm for pine, under 581 mm rain. The partial correlation coefficient between daily sapflow and soil moisture was higher for pine than for cypress (0.66 vs. 0.31). Pine had a wider range of <i>gs</i> values and narrower range of <i>Ψ</i> values than cypress. Evapotranspiration from the open area was 14% higher than from under the tree canopy.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EcohydrologyPub Date : 2025-06-05DOI: 10.1002/eco.70017
Hu Jun, Zhang Xiang, Chi Shiyun, Li Yilun
{"title":"Study on the Multiple Mechanisms of Hydroecological Effects in Lower-Middle Hanjiang River","authors":"Hu Jun, Zhang Xiang, Chi Shiyun, Li Yilun","doi":"10.1002/eco.70017","DOIUrl":"https://doi.org/10.1002/eco.70017","url":null,"abstract":"<div>\u0000 \u0000 <p>This study utilized data on phytoplankton and benthic macroinvertebrates from the main stem of the Han River during 2011–2012, employing a functional linear model (FLM) to explore the hydroecological effects under different hydrological conditions. The results indicated that the impact of flow and flow rate changes on the density of phytoplankton and benthic macroinvertebrates is complex. In the short term, low flow and smaller flow rate changes favour the growth of phytoplankton, while high flow inhibits their growth. However, in the long term, high flow promotes the growth of phytoplankton. Although the flow change model for benthic macroinvertebrates was not statistically significant, their response to flow changes was also complex, with flow rate changes significantly affecting their density. There was a positive lag effect within a 1-year cycle, but this lag effect weakened over time, possibly due to habitat destruction or unstable food sources caused by severe or prolonged flow changes. Overall, the FLM identified statistically significant relationships with river flow over the past 12 months, providing a new perspective for predicting ecological flow scenarios. The research findings offer recommendations and a scientific basis for flow management in the Han River.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213899","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}
EcohydrologyPub Date : 2025-06-04DOI: 10.1002/eco.70051
Bowen Yu, Li Chen, Chenggang Yang, Peng Zhang
{"title":"Meso-Scale Habitat Distribution and Suitability Evaluation in Large River Systems: A Case Study of the Middle Yangtze River","authors":"Bowen Yu, Li Chen, Chenggang Yang, Peng Zhang","doi":"10.1002/eco.70051","DOIUrl":"https://doi.org/10.1002/eco.70051","url":null,"abstract":"<div>\u0000 \u0000 <p>Meso-scale riverine habitat assessment is important for river ecological assessments and comprehensive river management. However, there remains a gap in meso-scale habitat evaluations in large rivers like the Middle Yangtze River. This study focuses on the Middle Yangtze River and selects typical reaches to conduct meso-habitat assessments. Hydraulic unit habitats are delineated based on flow velocity and water depth. Distribution and diversity of hydraulic units are analysed, together with their variation with discharges. Combining physical habitat model, the suitability of different ecological targets in different hydraulic units is analysed considering the factors of water depth, flow velocity and substrate composition. Key findings indicate that under low discharges, the proportions of different hydraulic units are evenly distributed, leading to high habitat diversity. In meandering and straight subreaches, with increasing discharge, the hydraulic unit composition shifts towards a dominance of deep-fast (D-F) units, resulting in reduced diversity. Meandering subreach exhibits higher diversity compared to straight subreach. In bifurcated reaches, the presence of mid–channel bar and floodplains contributes to higher diversity after flooding. The results of physical habitat model reveal differences in suitability across different ecological targets and different hydraulic units and find that hydraulic units of deep-slow (D-S) and shallow-slow (S-S) are highly important habitat types. The absence of these habitats could negatively impact certain ecological targets, such as macroinvertebrates, juvenile fish and Chinese sturgeon. Therefore, it is essential to maintain these habitats during river management. In contrast, other hydraulic units could be replaced reciprocally because of their similarities in habitat suitability. The findings of this research could serve as a reference for future river management and habitat conservation efforts.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214073","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}
EcohydrologyPub Date : 2025-06-04DOI: 10.1002/eco.70054
Stefanie Dumberger, Laura Kinzinger, Markus Weiler, Christiane Werner, Simon Haberstroh
{"title":"Dynamic Shifts in Radial Sap Flow of Two Temperate Tree Species in Response to the Dry Summer 2022","authors":"Stefanie Dumberger, Laura Kinzinger, Markus Weiler, Christiane Werner, Simon Haberstroh","doi":"10.1002/eco.70054","DOIUrl":"https://doi.org/10.1002/eco.70054","url":null,"abstract":"<p>Species-specific regulation of water fluxes and storage in the xylem are important drivers of drought tolerance. However, differences may occur along the radial profile of the xylem, potentially modifying drought responses. We investigated sap flow (<i>J</i><sub><i>s</i></sub>) and stem water content (WC<sub>stem</sub>) at two xylem depths, and diurnal stem radius variations of <i>Quercus petraea</i> and <i>Abies alba</i> in a mature forest stand in SW-Germany during 2 years of contrasting environmental conditions. In response to drought, <i>Q. petraea</i> maintained high <i>J</i><sub><i>s</i></sub>, albeit with a dynamic shift of <i>J</i><sub><i>s</i></sub> between inner and outer xylem vessels: Under high vapour pressure deficit (VPD), <i>J</i><sub><i>s</i></sub> in the inner xylem exceeded <i>J</i><sub><i>s</i></sub> in the outer xylem during the day, despite its ring-porous xylem anatomy. From dusk to dawn and at low VPD, this pattern was reversed with higher <i>J</i><sub><i>s</i></sub> in the outer xylem compared to the inner xylem. Since WC<sub>stem</sub> in the outer xylem reached a plateau concurrently to the shift, and tree water deficits could be refilled most nights in <i>Q. petraea</i>, dynamic reduction of <i>J</i><sub><i>s</i></sub> in the outer xylem likely prevented excessive depletion of stem water reserves. In contrast, <i>A. alba</i> strictly decreased <i>J</i><sub><i>s</i></sub> by up to 80% in a dry compared to a wet year, with more pronounced reductions in the inner xylem. In summary, our study demonstrated that a dynamic shift in regulation of <i>J</i><sub><i>s</i></sub> between different xylem depths and its link to stem water reserves might be an understudied trait of temperate trees and should be incorporated into future studies.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
EcohydrologyPub Date : 2025-06-04DOI: 10.1002/eco.70058
Sherin K. Sheir, Azza H. Mohamed, Gamalat Y. Osman, AbdElhafez R. AbdElhafez, Hoda H. Abdel-Azeem
{"title":"Ecological and Toxicological Impacts of Titanium Dioxide Nanoparticles on the Freshwater Clam Caelatura nilotica and Recovering Role of Dimercaptosuccinic Acid, Gizay Village, Menoufia Governorate, Egypt","authors":"Sherin K. Sheir, Azza H. Mohamed, Gamalat Y. Osman, AbdElhafez R. AbdElhafez, Hoda H. Abdel-Azeem","doi":"10.1002/eco.70058","DOIUrl":"https://doi.org/10.1002/eco.70058","url":null,"abstract":"<div>\u0000 \u0000 <p>The increasing release of titanium dioxide nanoparticles (TiO<sub>2</sub> NPs) into aquatic environments raises concerns about their ecological and hydrological implications. This study investigated the impact of TiO<sub>2</sub> NPs on the freshwater clam <i>Caelatura nilotica</i>, a bioindicators for water pollution in the Nile ecosystem, focusing on genetic, immunological and histological responses of exposed clams that influence water quality and ecosystem stability. Parameters assessed include DNA damage in gills, haemocyte dynamics, neutral red uptake, and histological and ultrastructural changes in gills’ tissues. Clams were continuously exposed to 25 and 150 μg/L of TiO<sub>2</sub> NPs, with and without 200 μg/L of dimercaptosuccinic acid (DMSA), over 28 days. The high TiO<sub>2</sub> NP concentrations (150 μg/L) resulted in significant DNA damage (<i>p</i> < 0.05), reduced haemocyte counts and altered granulocyte dynamics, all of which can impair natural filtration processes critical to hydrological balance. Severe histological damage, such as cilia erosion and blood deprivation in gills, was observed at the high TiO<sub>2</sub> NP concentration, as confirmed by TEM analysis. Addition of DMSA alongside TiO<sub>2</sub> NPs during clam exposure mitigated these harmful effects, improving gills structure and function. These findings highlight the potential risks of TiO<sub>2</sub> NP contamination on aquatic ecosystems and underscore the protective role of DMSA in maintaining ecological and hydrological integrity.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144206342","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}