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.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.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.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}
EcohydrologyPub Date : 2025-05-26DOI: 10.1002/eco.70050
Abigail G. Sandquist, Stephen P. Good, Gabriel Barinas, Scott T. Allen
{"title":"Effectiveness of Predicting Event-Level Interception Losses Across Diverse Vegetated Sites Using Statistical Models","authors":"Abigail G. Sandquist, Stephen P. Good, Gabriel Barinas, Scott T. Allen","doi":"10.1002/eco.70050","DOIUrl":"https://doi.org/10.1002/eco.70050","url":null,"abstract":"<div>\u0000 \u0000 <p>Understanding evaporation from wet canopies across ecosystems is challenged by its spatiotemporal variability and associated observational challenges. Precipitation and throughfall were measured at 22 sites of the National Ecological Observatory Network using consistent methodologies across diverse climates and ecosystems, providing a novel opportunity to examine the performance of statistical models in predicting interception loss from meteorological and canopy-structure data. We used those data to quantify event-level interception losses and found wide variation; median interception loss of small storms (< 10 mm) was 37.7% (39% inter-quartile range), and of large storms (> 50 mm) was 19.8% (20% interquartile range). We found storm gross-precipitation depth was the most important variable for predicting the amount of interception loss (predicting ~70% of the variation), followed by mean canopy height and air temperature. Storm gross-precipitation depth was also an important predictor of interception loss as a percent of storm depth, but much less variation was explained (<i>R</i><sup>2</sup> = 0.11, RMSE = 24%). Prediction of percent interception loss improved (<i>R</i><sup>2</sup> = 0.32 and RMSE = 19%) by including additional meteorological and vegetation structure characteristics in a random forest model. In addition to demonstrating the greater importance of storm traits over vegetation traits in predicting event interception losses, this analysis showed that relationships between storm traits and interception losses differed among sites; these inconsistent relationships across sites limited the ability for any statistical model to perform well in predicting event-level interception losses across sites, which may justify the use of alternative approaches (e.g. process-based models).</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 3","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140715","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 : 2025-05-26DOI: 10.1002/eco.70053
Jorgelina P. Asmus, Marcelo Romano, Ignacio M. Barberis
{"title":"Hydrological Conditions and Climatic Factors Shape Waterbird Functional Diversity in a Ramsar Site of Argentina","authors":"Jorgelina P. Asmus, Marcelo Romano, Ignacio M. Barberis","doi":"10.1002/eco.70053","DOIUrl":"https://doi.org/10.1002/eco.70053","url":null,"abstract":"<div>\u0000 \u0000 <p>With global biodiversity in decline, functional biodiversity metrics help link biodiversity changes to ecosystem functioning. In wetlands, extreme events like droughts and floods challenge waterbirds, affecting survival and reproduction. At Pampean lakes in Argentina, hydrological fluctuations are significant. We examined how waterbird functional diversity responds to these changes at the Melincué Ramsar Site, considering seasonality and whether environmental filtering or competition shapes community structure. Using waterbird counts from 1992 to 2019, we calculated functional richness, evenness, divergence and dispersion based on species traits. We employed general linear models and beta distance to assess relationships between functional diversity indices and hydrological variables, and explore assembly patterns. We recorded 71 waterbird species. Functional richness decreased by nearly 26% in drier years, indicating a loss of trait diversity under reduced hydrological conditions. Evenness correlated positively with precipitation and negatively with lake area, peaking at intermediate Standardized Precipitation-Evapotranspiration Index over a 12-month period (SPEI 12) values. Divergence increased with precipitation but was lowest at intermediate SPEI 12 values and highest in summer. Dispersion peaked at intermediate lake areas, increasing with summer precipitation but decreasing with winter precipitation. Trait-convergence assembly patterns (TCAP) analysis showed community structure significantly changed with lake area, was marginally significant for SPEI 12 and not significant for precipitation. Maximum functional diversity occurred when the lake was neither too high nor too low and seasonality influenced functional diversity responses. These results highlight environmental filtering as the primary driver of waterbird assembly over time and underscore the need to incorporate hydrological dynamics into wetland conservation planning.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 3","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140714","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 : 2025-05-26DOI: 10.1002/eco.70032
Laura E. Michie, Katherine A. Harrisson, Meaghan L. Rourke, David A. Crook, Ivor Stuart, Iain Ellis, Clayton P. Sharpe, Gavin L. Butler, Jason D. Thiem
{"title":"Dispersal and Kinship Patterns of a Pelagic-Spawning Riverine Fish Highlight the Value of Connectivity Over Large Spatial Scales","authors":"Laura E. Michie, Katherine A. Harrisson, Meaghan L. Rourke, David A. Crook, Ivor Stuart, Iain Ellis, Clayton P. Sharpe, Gavin L. Butler, Jason D. Thiem","doi":"10.1002/eco.70032","DOIUrl":"https://doi.org/10.1002/eco.70032","url":null,"abstract":"<p>Managing fish populations in regulated rivers requires an understanding of the spatial and temporal scale of their dispersal, the locations of key spawning and nursery habitats and the hydraulic processes that interplay with their life history. Golden perch (<i>Macquaria ambigua</i>), an Australian freshwater pelagic-spawning fish, highlights the worldwide challenges of managing riverine species that rely on hydraulic conditions to sustain critical metapopulation processes. This study aimed to quantify the spatial scale of early life history golden perch dispersal after a drought-breaking in-channel flow event in early 2020 in a regulated lowland river. Otolith microchemistry (<sup>87</sup>Sr/<sup>86</sup>Sr) and single nucleotide polymorphisms (SNPs) determined natal origins and sibling relationships, respectively, of young-of-year (YOY) caught in a floodplain nursery with larval fish captured upstream. For fish collected in the floodplain nursery, dispersal distances ranged to ~1600 km. Otolith microchemistry attributed 52% of YOY as localised in origin, 44% as originating in the midcatchment and 4% from the most upstream sample locations. Genetic analyses identified a full-sibling pair captured 900 km apart and 31 half-sibling pairs that linked YOY to larval fish captured at a diversity of upstream sites. Our study highlights the range of spatial scales over which ELH dispersal can occur for golden perch and emphasises the importance of interconnected flowing river habitats in sustaining metapopulation processes. We illustrate the positive results that increased riverine connectivity can yield for fish with similar life history strategies.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 3","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135755","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}