Ecohydrology最新文献

Modelling the Impacts of Hydropower on Fish Spawning Habitat Assessment: A Case Study Example for an Endemic Ray-Fin Species (Schizopygopsis younghusbandi) in Tibet

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-10-02 DOI: 10.1002/eco.70107

Yongzeng Huang, Xiaogang Wang, Hao Jiang, Hongze Li, Biao Wang, Kaixiao Chen, Jiangshan Ren

{"title":"Modelling the Impacts of Hydropower on Fish Spawning Habitat Assessment: A Case Study Example for an Endemic Ray-Fin Species (Schizopygopsis younghusbandi) in Tibet","authors":"Yongzeng Huang, Xiaogang Wang, Hao Jiang, Hongze Li, Biao Wang, Kaixiao Chen, Jiangshan Ren","doi":"10.1002/eco.70107","DOIUrl":"https://doi.org/10.1002/eco.70107","url":null,"abstract":"<div>\u0000 \u0000 Hydropower development significantly impacts the fragile fish habitats in river reaches of the Tibetan Plateau. To support the conservation of fish resources in these reaches, this study developed a physical habitat evaluation model for spawning grounds based on the ecological requirements of key fish species. An artificial neural network (ANN) model was employed to fit the response relationships between spawning ground indicators and environmental factors. Results indicate that water temperature is a critical factor influencing spawning grounds. In natural river reaches, suitable spawning periods occur primarily in the afternoon. In contrast, water temperature in dam-downstream reaches is significantly affected by hydropower operations, leading to distinct differences in spawning rhythms compared to natural reaches. The Weighted Usable Area (WUA) and Patch Number (PN) of spawning grounds initially increase and then decrease with rising flow. The ANN model effectively fits the response relationships between environmental factors and WUA and PN (R2 > 0.87). Water temperature exhibits a stronger influence, while flow primarily affects WUA and PN by altering suitable substrate area. This study presents the development and application of physical and ANN models for fish spawning grounds in hydropower-affected river reaches of the Tibetan Plateau. The findings reveal the distribution patterns of spawning grounds and identify key environmental factors. These results provide methodological references and scientific evidence for the evaluation and conservation of fish resources, supporting the sustainable management of native fish populations in plateau rivers.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 7","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223829","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}

引用次数: 0

Does Local Bed Shear Stress Predict the Occurrence of Freshwater Mussels? 局部河床剪应力能否预测淡水贻贝的发生？

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-10-01 DOI: 10.1002/eco.70112

Julian Lum, Todd J. Morris, Josef Daniel Ackerman

{"title":"Does Local Bed Shear Stress Predict the Occurrence of Freshwater Mussels?","authors":"Julian Lum, Todd J. Morris, Josef Daniel Ackerman","doi":"10.1002/eco.70112","DOIUrl":"https://doi.org/10.1002/eco.70112","url":null,"abstract":"The relationship between near-bed hydrodynamics, pore-water chemistry and the presence of unionids was examined in a well-characterized multispecies mussel bed (26 species; ~24 mussels m−2; 70% gravel, 20% cobble and 10% sand) within a lowland river (Sydenham River) in southern Ontario, Canada. Local bed shear stress (τb) was determined from velocity profiles at ~1-m intervals along four laterals and three longitudinal transects in the reach providing 118, 14.3-cm diameter quadrats in which porewater was sampled and sediments were excavated for unionids. Ninety-four unionids (10–135 mm long) from 14 species were found in 56 quadrat locations that had significantly higher mass of very fine gravel (2000-μm sieve) and lower dissolved oxygen in a comparison of individual environmental factors. Larger adult mussels (i.e., > 30 mm long; n = 68) were found in quadrats with τb = 0.022–1.34 Pa and an excavated very fine gravel mass = 616–2821 g, but smaller, juvenile mussels (< 30 mm; n = 26) were found in a more restricted range of τb and sediment content (0.075–0.77 Pa and 1151–2561 g, respectively). Using forward and backward stepwise habitat variable selection in logistic regression, models incorporating τb, τb2 and/or very fine gravel mass provided the highest probability of locating juvenile mussels. The final model, which is based on body size, is informative at the community level rather than on a species-specific basis. These results provide insights into the relationship between near-bed hydrodynamics and these important benthic invertebrates, the location of small juvenile and larger adult unionids and their habitats in riverbeds. Conservation efforts should focus on preserving and enhancing these habitats and those of the most vulnerable early life stages of freshwater mussels.","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 7","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145196324","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}

引用次数: 0

Ecohydrological Modelling in the Ondas River, Brazil: Implications for Fisheries Management 巴西翁达斯河的生态水文模型：对渔业管理的影响

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-18 DOI: 10.1002/eco.70113

Jady da Silva Nepomuceno, Elis Regina Rodrigues de Souza Castro, Clívia Dias Coelho, Michel Castro Moreira, Demetrius David da Silva

{"title":"Ecohydrological Modelling in the Ondas River, Brazil: Implications for Fisheries Management","authors":"Jady da Silva Nepomuceno, Elis Regina Rodrigues de Souza Castro, Clívia Dias Coelho, Michel Castro Moreira, Demetrius David da Silva","doi":"10.1002/eco.70113","DOIUrl":"https://doi.org/10.1002/eco.70113","url":null,"abstract":"This paper aimed to perform an ecohydrological analysis of the Ondas river basin, located in the Brazilian Cerrado, using the Physical Habitat Simulation (PHABSIM) model, in order to determine the monthly ecological flows for its lower course. For calibration and simulation in PHABSIM, field experiments were conducted during dry and rainy periods, in a 300-m stretch located in the lower course of the Ondas river. The estimate of monthly ecological flows was obtained by analysing the Weighted Usable Area of the ichthyofauna species of the river stretch, as a function of the streamflows with a probability of nonexceedance of 50% (Q50), 60% (Q60), 70% (Q70), 80% (Q80), 90% (Q90) and 95% (Q95). In the dry period, the ecological flow varied between 31.72 and 40.14 m3 s−1, whereas in the rainy season, it presented values between 33.23 and 51.94 m3 s−1. Considering the water use rights criterion of the State of Bahia, Brazil, where it is permissible to use up to 80% of the Q90, it was verified that the adoption of ecological flows would considerably reduce the quantity of water that could be used for human purposes but would maintain the habitat of the bioindicator species studied. The ecological flow regime obtained provides subsidies for discussions and negotiations on the water resources management in the Ondas river basin, considering the ecohydrological aspects affecting the region, in addition to the water quantitative and qualitative factors.","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70113","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101892","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}

引用次数: 0

Lidar-Derived Forest Metrics Predict Snow Accumulation in the Central Sierra Nevada, USA 激光雷达衍生的森林指标预测美国内华达山脉中部的积雪量

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-18 DOI: 10.1002/eco.70109

Cara R. Piske, Rosemary W. H. Carroll, Gabrielle F. S. Boisrame, Sebastian A. Krogh, Aidan L. Manning, Kristen L. Underwood, Gabriel Lewis, Adrian A. Harpold

{"title":"Lidar-Derived Forest Metrics Predict Snow Accumulation in the Central Sierra Nevada, USA","authors":"Cara R. Piske, Rosemary W. H. Carroll, Gabrielle F. S. Boisrame, Sebastian A. Krogh, Aidan L. Manning, Kristen L. Underwood, Gabriel Lewis, Adrian A. Harpold","doi":"10.1002/eco.70109","DOIUrl":"https://doi.org/10.1002/eco.70109","url":null,"abstract":"<div>\u0000 \u0000 Snowmelt from montane forests is a critical water resource in the western United States. Forest managers use treatments like selective thinning to encourage resilient ecosystems for wildfire mitigation and wildlife habitat. There is also interest in managing forests to optimize snowpack retention to improve water resources in a changing climate, but detailed studies and management recommendations are limited. We explore the controls on snowpack accumulation using a newly developed light detection and ranging (lidar) point-cloud filtering method and a local open-reference area approach using data collected over gradients in forest structure across multiple snow seasons in the Sagehen Creek Basin (SCB) in the central Sierra Nevada, California, USA. Consistent with previous studies with much more limited snow and vegetation measurements, we show there is ~25% more snow accumulation in open areas relative to forested areas. Random forest (RF) outputs indicate that forest structure metrics explain a greater amount of accumulation variance than terrain metrics, and the greatest potential to increase snow accumulation via thinning occurs when the fraction of vegetation (fVEG) is > 30%. Our results suggest that considering both coarse (e.g., fVEG) and fine-scale (e.g., the arrangement of canopy) canopy information is integral to predict snowpack response to canopy disturbance at many relevant management scales (i.e., 100 m2 to 100 km2). The corresponding simple decision support tool, developed with data from SCB, can assess the utility of completed and planned forest restoration over a larger spatial extent to strategically target areas with the highest potential snowpack response. Our new lidar processing methods are easily transferrable to other areas where they could improve snowpack management from forest restoration.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101922","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}

引用次数: 0

Forest Patch Geometry and Climate Regulate the Impact of Forest Thinning on Snowpack in the Southwest United States 美国西南部森林斑块几何和气候调节森林间伐对积雪的影响

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-16 DOI: 10.1002/eco.70111

Patrick D. Broxton, Joel A. Biederman, Ravindra Dwivedi, Willem J. D. van Leeuwen, Temuulen Ts. Sankey, Travis Woolley, Bohumil M. Svoma

{"title":"Forest Patch Geometry and Climate Regulate the Impact of Forest Thinning on Snowpack in the Southwest United States","authors":"Patrick D. Broxton, Joel A. Biederman, Ravindra Dwivedi, Willem J. D. van Leeuwen, Temuulen Ts. Sankey, Travis Woolley, Bohumil M. Svoma","doi":"10.1002/eco.70111","DOIUrl":"https://doi.org/10.1002/eco.70111","url":null,"abstract":"<div>\u0000 \u0000 Despite having important implications for water resources, the climatic dependence of forest thinning impacts on snowpack is poorly quantified. In this study, we used a high-resolution snow model to understand the impact of forest thinning on snowpack in Arizona under contrasting climate conditions, leading to ephemeral vs. seasonal snowpack conditions. The model is evaluated using a spatiotemporally extensive set of snowpack measurements and is run for the same set of pre- and post-thinning forest patch geometry using two meteorological forcing datasets representing locally mid- and high-elevation climate conditions. Although the high-elevation climate is only 1°C cooler and has 20% more winter precipitation, it leads to markedly different snowpack conditions, i.e., twice as long-lasting snowpack, less mid-winter ablation events and ~60% larger at its peak. For both climates, forest thinning increased peak snow water equivalent (SWE) and liquid water input (LWI), but it decreased snow cover duration (SCD) only for the high-elevation climate. Total sublimation losses decreased from ~35% of wintertime precipitation pre-thinning to ~25% post-thinning for the high-elevation climate and from ~25% to ~15% for the mid-elevation climate. Generally, a 10% reduction in canopy cover resulted in ~4.5% more snowfall reaching the ground, and a 10-day decrease in SCD reduced the fraction of winter precipitation lost to snowpack sublimation by ~2%. Post-thinning changes in forest patch geometry were also important as larger canopy gaps had more LWI, and areas with warmer canopy edges had lower peak SWE and SCD.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101724","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}

引用次数: 0

Potential for Hydroacoustic Technology to Describe Physical Habitat for Imperilled Native Freshwater Mussels 水声技术描述濒危本地淡水贻贝物理栖息地的潜力

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-15 DOI: 10.1002/eco.70081

Jenny Hanson, Jayme Strange, Lisie Kitchel, Jesse Weinzinger, Teresa Newton

{"title":"Potential for Hydroacoustic Technology to Describe Physical Habitat for Imperilled Native Freshwater Mussels","authors":"Jenny Hanson, Jayme Strange, Lisie Kitchel, Jesse Weinzinger, Teresa Newton","doi":"10.1002/eco.70081","DOIUrl":"https://doi.org/10.1002/eco.70081","url":null,"abstract":"<div>\u0000 \u0000 The lack of information on what constitutes suitable habitat for native freshwater mussels can limit restoration efforts. While many species reside in silt–sand–gravel substrates, species such as the Spectaclecase (Cumberlandia monodonta) and Salamander (Simpsonaias ambigua) mussels are thought to be associated with rock structures (e.g., wing dams and rock outcrops) in rivers. Our objective was to assess if hydroacoustic technology could be used to quantify physical habitat features for C. monodonta and S. ambigua. Multibeam echosounder, acoustic Doppler current profiler, sidescan sonar and underwater videography were used to quantify water depth, substrate hardness, bed roughness and bed slope of the riverbed, water velocity, shear velocity and the degree of rock clustering at six sites in the Saint Croix River, Minnesota. The sites varied in type of rock structures and relative abundances of both species. The strength of the associations among physical habitat features and mussel abundance was weak; R2 values were typically < 0.5. However, species-specific differences in microhabitat were observed. For example, C. monodonta was typically observed at sites with higher velocity and shear velocity compared to S. ambigua. Mussel abundance was greatest at sites that contained crevices of sand surrounded by boulders and bedrock. Future refinements in hydroacoustic methods and post-processing computations could improve predictions. Information on habitat features from occupied and unoccupied sites could help resource managers characterize existing occupied habitats, identify potential reintroduction areas and implement restoration programmes.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057743","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}

引用次数: 0

Exploring the Effect of Meteorological and Hydrological Trends on Groundwater Drought Index: The Case of Seyhan Basin 气象水文变化趋势对地下水干旱指数的影响探讨——以塞汉盆地为例

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-11 DOI: 10.1002/eco.70110

Mehmet Dikici, Halil Ibrahim Burgan

{"title":"Exploring the Effect of Meteorological and Hydrological Trends on Groundwater Drought Index: The Case of Seyhan Basin","authors":"Mehmet Dikici, Halil Ibrahim Burgan","doi":"10.1002/eco.70110","DOIUrl":"https://doi.org/10.1002/eco.70110","url":null,"abstract":"<div>\u0000 \u0000 Understanding the disasters that arise from climate change in advance and developing necessary adaptation plans are crucial to mitigate their impacts. Drought progresses slowly but can profoundly impact entire ecosystems and human livelihoods. Many indices are introduced to analyse drought. This study aims to quantify the spatiotemporal response of groundwater systems to long-term meteorological and hydrological trends in the Seyhan Basin using the Groundwater Drought Index (GWI). It tests the hypothesis that groundwater drought exhibits a lagged but regionally distinct response to climatic drivers, especially in semiarid regions where topography, distance to the sea and anthropogenic withdrawals vary significantly. The years 1970–2016 were selected for analysing meteorological data and 1970–2015 for analysing hydrological data. Fifteen measurements from 24 meteorological observation stations (15 within the basin and 9 in neighbouring basins), 5 evaporation observation stations, 20 stream-gauging stations and 9 groundwater observation wells were utilised. The effects of analysed trends on GWI were examined, and climate change has been observed to impact drought parameters from a holistic perspective. Selecting an index appropriate to regional characteristics should be considered, and updating measurements is crucial for accurate predictions.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037874","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}

引用次数: 0

Intraspecific Dominance Determines Subseasonal Pinus ponderosa Growth Response to Warm-Season Precipitation Amid Drought in Southern Nevada, USA 种内优势决定了美国南内华达州干旱中暖季降水对亚季节性黄松生长的响应

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-03 DOI: 10.1002/eco.70105

Charles M. Truettner, Simon R. Poulson, Emanuele Ziaco, Adam Z. Csank

{"title":"Intraspecific Dominance Determines Subseasonal Pinus ponderosa Growth Response to Warm-Season Precipitation Amid Drought in Southern Nevada, USA","authors":"Charles M. Truettner, Simon R. Poulson, Emanuele Ziaco, Adam Z. Csank","doi":"10.1002/eco.70105","DOIUrl":"https://doi.org/10.1002/eco.70105","url":null,"abstract":"<div>\u0000 \u0000 Pinus ponderosa is a widespread conifer species across western North America, yet its intraspecific variability in drought response remains understudied, particularly at subseasonal time scales. We investigated how intraspecific tree dominance influences physiological and anatomical growth responses to warm-season precipitation pulses in a semi-arid montane forest in southern Nevada, USA. Using high-resolution dendrochronology, quantitative wood anatomy and dual-isotope (δ18O, δ13C) analysis of tree-ring cellulose, we compared dominant (old-growth) and codominant (mature) trees during two growing seasons: one impacted by a remnant tropical storm that provided an uncharacteristic pulse of precipitation to southern Nevada during the monsoon season (2015) and one with drier conditions with little monsoonal precipitation (2016). Codominant trees exhibited stronger and more immediate growth responses to warm-season precipitation, characterized by increased tracheid production and cellulose δ18O values that matched those of warm-season precipitation δ18O values, indicating shallow soil water use. In contrast, dominant trees relied more on deeper soil moisture and showed more conservative growth strategies. These divergent strategies suggest that intraspecific dominance mediates access to water and controls the sensitivity of growth to seasonal precipitation variability, highlighting the importance of intraspecific variation in shaping forest resilience and climate adaptation strategies under increasing drought and climate extremes.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930059","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}

引用次数: 0

Moisture and Species Effect on Water Colour Generation in an Australian Temperate Forested Catchment 水分和物种对澳大利亚温带森林流域水色产生的影响

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-03 DOI: 10.1002/eco.70106

Mariia Lukinykh, Christopher Sean Lyell, Charuni Jayasekara, Patrick Lane, Gary Sheridan

{"title":"Moisture and Species Effect on Water Colour Generation in an Australian Temperate Forested Catchment","authors":"Mariia Lukinykh, Christopher Sean Lyell, Charuni Jayasekara, Patrick Lane, Gary Sheridan","doi":"10.1002/eco.70106","DOIUrl":"https://doi.org/10.1002/eco.70106","url":null,"abstract":"South-eastern Australian forested catchments supply most of Melbourne's drinking water, and discoloured water poses significant challenges for authorities because of the need for complex and costly treatment procedures. Identifying the sources and mechanisms of colour production is therefore critical. We investigated the role of leaf litter from five common catchment tree species in generating water colour under three moisture conditions (Saturated, Moist and Air-dry) by conducting a laboratory leaching experiment. Results showed that leaf litter under Moist conditions (2871.2 ± 383.24 PCU) produced significantly higher cumulative colour compared with Saturated (496 ± 98.34 PCU) and Air-dry (452.2 ± 62.67 PCU) conditions. This is likely due to optimal microbial decomposition under Moist conditions, where both oxygen and water availability are sufficient. In contrast, Saturated samples exhibited a faster initial rate of colour production that peaked earlier (Week 1) than Moist (Week 2) and Air-dry (Week 4) samples, likely driven by a combination of leaching and decomposition processes. In Moist and Saturated samples, decomposition was strongly correlated with the colour generation process. When species effects are considered, Eucalyptus radiata had the highest cumulative colour production (1711.33 ± 892.61 PCU), whereas Eucalyptus regnans had the lowest (730 ± 320.44 PCU). Our findings highlight the critical role of litter moisture in driving colour generation in drinking water catchments. Future research should focus on understanding how changes in rainfall patterns and subsequent litter moisture levels may influence colour production. Such insights could inform management strategies to mitigate water discolouration and reduce treatment costs.","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70106","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930058","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}

引用次数: 0

Controls on Discharge and Drying in an Intermittent Grassland Stream: Temporal and Network Variability 间断性草地河流的排水和干燥控制：时间和网络变率

IF 2.1 3区环境科学与生态学

Ecohydrology Pub Date : 2025-09-03 DOI: 10.1002/eco.70108

M. A. Raihan, W. K. Dodds, S. Zipper, T. L. Moore

{"title":"Controls on Discharge and Drying in an Intermittent Grassland Stream: Temporal and Network Variability","authors":"M. A. Raihan, W. K. Dodds, S. Zipper, T. L. Moore","doi":"10.1002/eco.70108","DOIUrl":"https://doi.org/10.1002/eco.70108","url":null,"abstract":"<div>\u0000 \u0000 Intermittent streams are prevalent worldwide, yet the understanding of drivers of their changing flow patterns remains incomplete. We examined hydrological changes spanning four decades (1982–2020) in Kings Creek, an intermittent grassland stream within the Konza Prairie Biological Station in Kansas, USA. We analysed streamflow data from a US Geological Survey gauge on Kings Creek and three upstream Long Term Ecological Reasearch (LTER) sub-watersheds with annual, biennial or quadrennial burn frequencies and linked trajectories of woody encroachment to increased evapotranspiration and changes in streamflow. Riparian woody cover doubled in the annually and biannually burned sub-watersheds and sevenfold in the quadrennially burned watersheds. We observed significant decreases (84%) in daily discharge and number of annual flow days (55%) at the downstream USGS Kings Creek gauge, with similar changes in the LTER sub-watersheds. The changing riparian cover, propelled by the regional expansion of woody plants, contributed to decreased streamflow by amplifying actual evapotranspiration (ET). Seasonal assessments underscored the critical influence of late summer conditions (July–September), under which increases in ET were linked to rising temperatures and increased evapotranspiration by riparian cover. Our results highlight the significant hydrological impacts of woody encroachment in grasslands and emphasize the importance of long-term ecohydrological monitoring in unravelling the interplay between climate and vegetation as controls on the hyper-variable flow patterns in this intermittent stream. Predicting and managing hydrological impacts on the flow of intermittent grassland rivers and streams worldwide requires accounting for the effects of accelerating woody encroachment.\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 6","pages":""},"PeriodicalIF":2.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144930056","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}

引用次数: 0