Ecohydrology最新文献

{"title":"Revealing the Nexus Between Wind Wave Dynamics and Vegetation Biodiversity in Poyang Lake's Ecological Transition Zone","authors":"Xue Shang,&nbsp;Wenbo Chen,&nbsp;Fuqing Zhang","doi":"10.1002/eco.70021","DOIUrl":"https://doi.org/10.1002/eco.70021","url":null,"abstract":"<div>\u0000 \u0000 <p>Wind wave is a significant hydrodynamic factor in Poyang Lake, affecting the stability of the lake ecosystem. However, the processes and mechanisms by which it drives biodiversity patterns in ecological transition zones are not clear. This study delves into the intricate relationship between wind wave characteristics and the biodiversity of vegetation within the lake's ecological transition zone during the normal water level period from October to March in 2018–2019 and provides novel insights into the oscillation cycles of wind wave indexes and their influence on vegetation patterns. The main findings were as follows: (1) a cyclical trend occurred in wave height (WVH), wavelength (WVL) and shoreline flushing distance (FLD), with distinct oscillation periods and energy centres, notably a 47-day primary oscillation for WVH and WVL, and 40 days for FLD. It underscored the dynamic nature of wind wave interactions and their potential to shape the lake's ecological landscape. (2) Species richness increased from grasslands to ecological transition zones, dominated by Carex cinerascens, <i>Phragmites communis</i> and Triarrhena lutarioriparia, then declined towards water areas where <i>Phalaris arundinacea</i> and Gnaphalium affine became key species. (3) The biodiversity indexes (Shannon Diversity Index [SHDI], Modified Simpson Diversity Index [MSIDI]) and the evenness indexes (Shannon Evenness Index [SHEI], Modified Simpson Evenness Index [MSIEI]) reached the highest in the ecological transition zone and the lowest in the grassland, indicating the importance of these areas for species diversity. (4) There was a positive correlation between wind wave-induced shoreline flushing distance and vegetation height and coverage. This relationship was further linked to significant regulatory effects on vegetation richness, inversely affecting the size of vegetation diversity and evenness. Our findings highlight the complex trade-offs between vegetation richness and evenness/diversity, providing a foundation for future ecological restoration and conservation efforts. It not only contributes to the scientific understanding of the Poyang Lake ecosystem but also offers strategic insights for sustainable ecosystem management.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602672","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":"Effects of Fibrous Roots of Four Herbaceous Species on Water Flow Velocity and Rill Detachment Capacity","authors":"Misagh Parhizkar,&nbsp;Manuel Esteban Lucas-Borja,&nbsp;Pasquale Giuseppe Fabio Filianoti,&nbsp;Demetrio Antonio Zema","doi":"10.1002/eco.70016","DOIUrl":"https://doi.org/10.1002/eco.70016","url":null,"abstract":"<div>\u0000 \u0000 <p>Vegetal species are potentially effective at stabilising soil against water erosion due to the beneficial effects of their root system. In this regard, fibrous roots increase soil aggregation and improve its physical properties. However, the literature about the variability in particle detachment capacity in rills (the prevalent erosion form on steep and long hillslopes) with species with fibrous roots is not abundant. To fill this gap, this study has analysed the effects of fibrous roots of four herbaceous species (<i>Hypericum androsaemum</i>, <i>Urtica dioica</i> <i>L</i>., <i>Epipactis latifolia All</i>. and <i>Danae racemosa</i> (<i>L</i>.) <i>Moench</i>.) that are typical of Northern Iran on water flow velocity (<i>V</i>) and rill detachment capacity (<i>D</i>_<i>c</i>) by flume experiments. The results showed that plants with fibrous roots significantly reduced the mean <i>V</i>, but not <i>D</i>_<i>c</i> (except for <i>Danae racemosa</i> (<i>L</i>.) <i>Moench</i>.) between two positions located upstream and downstream of a rill. Only <i>D</i>_<i>c</i> of <i>Epipactis latifolia</i> <i>All</i>. was significantly different (−30% to −40%) compared with the other species. High correlations were found among the plant root characteristics. The associations between those vegetal parameters and <i>D</i>_<i>c</i> were significant but weaker. Linear regressions between <i>D</i>_<i>c</i> and shear stress allowed the estimation of rill erodibility and the critical value of the shear stress for all species, while equations set up to predict <i>D</i>_<i>c</i> from the stream power of the water flow showed a very high accuracy in all cases. Despite some limitations (linked to the small scale of the experiments), the study has demonstrated that the root system of herbaceous species may play an important role in rill erosion, but this erosion form may be driven by factors other than root system morphology.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143602671","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":"Monitoring Fish Assemblages in Seasonal Off-Channel Habitats Using Underwater Video and Computer Vision","authors":"Knut Marius Myrvold,&nbsp;Tobias Houge Holter,&nbsp;Birger Johan Nordølum,&nbsp;Eirik Osland Lavik,&nbsp;Kristian André Dahl Haugen,&nbsp;Tom-Ruben Traavik Kvalvaag,&nbsp;Marius Pedersen,&nbsp;Jon Museth","doi":"10.1002/eco.70015","DOIUrl":"https://doi.org/10.1002/eco.70015","url":null,"abstract":"<div>\u0000 \u0000 <p>Floodplains provide suitable spawning and rearing habitats for many freshwater fishes and refugia from high flow events. Here, we study seasonal habitat use at the northern edge of the distribution for several spring-spawning fishes in a major Norwegian river drainage and employ underwater video and computer vision to automatically detect, identify, and enumerate species in a seasonal, off-channel backwater slough. Fish actively migrated upriver from their overwintering habitat during the spring runoff, and entered the backwater on the first day it became accessible from the mainstem. A convolutional neural network model was trained to automatically detect species in video obtained via an underwater camera placed at the entrance of the backwater and tested on a representative sample of conditions encountered over the course of a summer season. When we analysed the distribution of prediction scores for tracked fish, we found that the software performed variably for the different species and that the concordance between true counts and software predictions generally improved with increasing mean prediction probability cutoff levels. The intraclass correlation coefficient between the true count and the prediction scores at different cutoff levels showed that the concordance was overall best for roach, followed by pike and tadpoles (frogs and toads). Finally, we found no clear effects of abiotic or optical conditions on the accuracy of the software across a range of prediction probability cut-off levels. We conclude that underwater video provides a feasible, non-invasive means to studying fish in seasonal habitats during vulnerable phases of their life cycle.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571375","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":"Enhancing Representativeness of Eddy Covariance Evapotranspiration With Remote Sensing and In Situ Data: A Case Study in the Brazilian Cerrado","authors":"Alex N. A. Kobayashi,&nbsp;Jamil A. A. Anache,&nbsp;Jullian S. Sone,&nbsp;Gabriela C. Gesualdo,&nbsp;Dimaghi Schwamback,&nbsp;Edson Wendland","doi":"10.1002/eco.70012","DOIUrl":"https://doi.org/10.1002/eco.70012","url":null,"abstract":"<div>\u0000 \u0000 <p>The Cerrado <i>sensu stricto</i>, so-called wooded Cerrado, is one of the many phytophysiognomies of the undisturbed Brazilian Cerrado ecoregion holding a biodiversity hotspot towards an extensive area. Thus, such land is under constant land use and cover changes mainly due to the demand for agriculture land, sector with the highest consumption of available freshwater in this ecoregion. This underscores this region's critical economic and environmental relevance. The evapotranspiration (ET) in the Brazilian Cerrado is a major player in the regional hydrological cycle, significantly influencing rainfall distribution in this ecoregion. Nonetheless, acquiring observed measurements of ET measurements using the eddy covariance (EC) technique is still challenging, especially where the flux footprint represents a heterogeneous canopy. Thus, how vegetation and spatiotemporal climate variability affect EC evapotranspiration were assessed in a preserved fragment of wooded Cerrado. Our goals were to (i) improve the water fluxes representativeness by coupling flux footprint with remote sensing products to account for spatiotemporal variability and (ii) assess how seasonal variability of vegetation and climate affect water fluxes in this study's target vegetation. First, we determined which integration approach with enhanced vegetation index (EVI) improved the representativeness of the study's site target vegetation—either a half-hourly flux footprint integration or a fixed-extent radius surrounding the flux tower. We further conducted a random forest analysis to identify the most relevant environmental and meteorological variables influencing the canopy conductance. We noted a significant gain in performance when EVI is integrated with the half-hourly footprint, indicating an improvement in the representativeness between this remote sensing variable and the EC fluxes, evidenced by a better energy balance closure. And we found that the most relevant variables were the vapor pressure deficit and soil water content at a seasonal and annual basis, respectively. Our findings highlight that integrating a vegetation index with flux footprint can enhance spatiotemporal representativeness of the target vegetation, contributing to a better regional understanding of not only the wooded Cerrado but also other complex and heterogeneous land covers in terms of water and energy fluxes.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571217","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":"Modelling Bending Behaviour of Flexible Submerged Vegetation Based on Fluid–Structure Coupling","authors":"Chen Yang,&nbsp;Tingkui Zhang,&nbsp;Zichao Han,&nbsp;Fan He,&nbsp;Ying Liu,&nbsp;Shanju Zhang,&nbsp;Xiaolei Zhang","doi":"10.1002/eco.70011","DOIUrl":"https://doi.org/10.1002/eco.70011","url":null,"abstract":"<div>\u0000 \u0000 <p>The bending behaviour of flexible submerged vegetation in water flow has been an important issue in ecological hydraulics; however, the understanding of its laws is still not in-depth enough, and a comprehensive exploration of the governing parameters remains lacking. To address this gap, a three-dimensional numerical model based on fluid–structure coupling was built in this paper and validated by experimental data. Utilizing this model, the bending behaviour of a single vegetation in various scenarios was simulated and analysed. The relationships between the relative bending height (RBH) and critical variables such as flow velocity, vegetation radius, elastic modulus and submergence ratio were found and fitted with different types of equations. Through multiple regression, a comprehensive formula to estimate the RBH of single submerged flexible vegetation was derived based on the simulation results. The formula established in this paper can quickly characterize the bending state of flexible vegetation in water, providing a basis for calculating water flow resistance and contributing to ecological, engineering and environmental studies.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571220","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":"Detecting Petalura gigantea: Novel eDNA Method and Water Balance Modelling Insights Enable Improved Catchment Management and Conservation Outcomes","authors":"J. Cairns,&nbsp;I. R. C. Baird,&nbsp;F. Johnson,&nbsp;L. Noble,&nbsp;W. Glamore","doi":"10.1002/eco.70013","DOIUrl":"https://doi.org/10.1002/eco.70013","url":null,"abstract":"<p><i>Petalura gigantea</i>, commonly known as the giant dragonfly, has long-lived fossorial larvae that are dependent on high water tables in peat swamps (mires) within its range in south-east Australia. It is an endangered species and is recognised as an appropriate umbrella species for the conservation of its upland swamp habitats. Detection of <i>P. gigantea</i> traditionally involves systematic exuviae surveys or line transect surveys for adults during the flying season from October to February. To address the limitations of these survey methods, we developed an environmental DNA (eDNA) assay to detect the species in swamp discharges. The eDNA quantitative polymerase chain reaction (qPCR) assay was successful in detecting a known population of <i>P. gigantea</i> and indicated the presence of larval populations in two swamps, one where traditional surveys had failed to detect the species. We used swamp water balance models, calibrated to three swamps, to inform the applicability of the eDNA detection method and to explore how catchment characteristics influence habitat suitability. Incorporating these hydrological considerations with basic climatic data enhances the reliability of eDNA detection. This approach, when combined with traditional survey techniques, supports improved conservation outcomes for this species and its endangered, groundwater-dependent, peat swamp communities. Developing eDNA assays for other peatland-dependent species globally could facilitate broader biodiversity assessments and bolster conservation of these sensitive habitats.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143565092","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}

{"title":"Drought Impact on Transpiration Dynamics of Common Deciduous Trees Growing at Contrasting Urban Sites","authors":"Markus Anys,&nbsp;Markus Weiler","doi":"10.1002/eco.70007","DOIUrl":"https://doi.org/10.1002/eco.70007","url":null,"abstract":"<p>Urban trees provide essential ecosystem services, notably air cooling through transpiration, which helps mitigate the urban heat island effect and enhances cities' climate resilience. However, the complex spatial variability within urban areas and extreme weather events like droughts can disrupt trees' ecohydrological dynamics. In a study conducted in Freiburg, Germany, we investigated transpiration processes in Norway maple (<i>Acer platanoides</i>) and small-leaved lime (<i>Tilia cordata</i>) across diverse urban locations, including parks, parking lots, grass verges and tree pits. We assessed the effects of four distinct drought periods on transpiration and compared differences between tree species and growing sites. Small-leaved lime exhibited a 5% greater reduction in transpiration during drought periods compared to Norway maple, which experienced a 34% decline in transpiration during peak sap flow compared to nondrought periods. Tree pits with 90% surface sealing induced the most significant drought-induced transpiration reduction for small-leaved lime (58%), with both species displaying the lowest transpiration to potential evapotranspiration ratio in these locations. Significant differences were observed in the diurnal sap velocity patterns for both species. We highlighted the site-specific impact of surface sealing on transpiration during droughts, as well as the significant relationship between soil water deficit and relative transpiration rates. This study provides crucial insights into common urban tree species' responses to drought-induced transpiration across varied urban settings, emphasising the role of surface sealing. Continuous monitoring of diverse urban tree species is essential for building extensive databases and enhancing our understanding of tree water relations in diverse urban landscapes.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554905","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}

{"title":"Assessment of Changes in River Flow and Ecohydrological Indicators From the Viewpoint of Changing Landscape Patterns in the Jialing River Basin, China","authors":"Gaozhen Wang,&nbsp;Wenxian Guo,&nbsp;Hongxiang Wang,&nbsp;Lintong Huang,&nbsp;Fengtian Hong,&nbsp;Yinchu Ma,&nbsp;Yajuan Ma,&nbsp;Handong Ye,&nbsp;Xiaohan Zhang,&nbsp;Jiangnan Yang","doi":"10.1002/eco.70001","DOIUrl":"https://doi.org/10.1002/eco.70001","url":null,"abstract":"<div>\u0000 \u0000 <p>Land use alterations significantly affect the hydrological processes in basins. Few studies, however, examine how future runoff variations and river ecohydrological indices may be affected by changes in regional land use from the standpoint of landscape pattern change (LPC). In this research, we combined historical land use data and future data modelled by the PLUS model to isolate six major landscape pattern indices by principal component analysis, which were used together with meteorological data to drive the long short-term memory network (LSTM) for runoff simulation. Therefore, the daily flow processes were obtained under different scenarios. The driving mechanisms of runoff changes and the changes in ecohydrological indicators were explored in conjunction with the daily flow process. The study shows that from 1980 to 2030, the Jialing River Basin's pattern of land use has seen substantial changes over time, and the landscape pattern tends to be further fragmented in 2030, the influence of the fragmentation of the pattern in the landscape makes the daily flow under the LSTM model's prediction of the natural development scenario smaller than that of the ecological protection scenario, the scenario backtracking method reveals that the LPC is the main driver of the future runoff change, and the changes and ecological impacts of river ecohydrological indicators were different in different scenarios. The study's findings can act as a foundation for land use planning, regulation of terrace reservoirs and sustainable development in the Jialing River Basin (JRB).</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497179","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":"Ecosystem Services Tradeoffs and Synergies Across Drought Gradients in the Middle Reaches of the Yellow River Basin: A Time Scale Perspective","authors":"Xiaoliang Shi,&nbsp;Xi Chen,&nbsp;Hao Ding,&nbsp;Dan Zhang,&nbsp;Xinshuang Wang","doi":"10.1002/eco.70006","DOIUrl":"https://doi.org/10.1002/eco.70006","url":null,"abstract":"<div>\u0000 \u0000 <p>In the context of global climate change, understanding the tradeoffs and synergies between ecosystem services (ESs) is essential for regional ecological management and sustainable development. This study simulated net primary productivity (NPP) and quick flow (QF) in the Middle Reaches of the Yellow River Basin (MRYRB) in 2000 and 2020, utilizing the Carnegie–Ames–Stanford Approach (CASA) and Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) models to assess ESs related to carbon sequestration (CS) and water yield (WY). The synergistic multi-temporal scale changes in ESs tradeoffs under different drought conditions were assessed by delineating regions with different drought frequencies. The results showed that (1) the mean NPP in the MRYRB increased from 189.03 g C/m² in 2000 to 335.94 g C/m² in 2020, reflecting a 77.71% rise, while the mean annual QF escalated from 41.20 mm in 2000 to 59.59 mm in 2020, marking an increase of 44.64%; (2) on a monthly scale, the tradeoff and synergy relationships exhibited distinct seasonal variations, with tradeoffs prevailing throughout the year and a shift from tradeoff to synergy in CS and WY during the summer and fall. On an annual scale, synergy was the dominant relationship; (3) the intensity of tradeoffs and synergies varied by drought gradients, with the highest intensity observed in high-frequency drought areas at the monthly scale, whereas, on an annual scale, low-frequency drought areas exhibited the strongest tradeoffs and synergies. This study provides an in-depth analysis of the interactions between ESs under varying drought conditions across different time scales. The findings highlight the distinct differences in tradeoffs and synergies of ESs, offering valuable scientific insights for the coordinated management of regional ecosystems.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497180","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":"A Continuous Semi-nonparametric Isotope-Based Mixing Model for Multimodal Water Uptake Patterns","authors":"Eric J. Neil,&nbsp;Han Fu,&nbsp;Bingcheng Si","doi":"10.1002/eco.70003","DOIUrl":"https://doi.org/10.1002/eco.70003","url":null,"abstract":"<p>Isotope mixing models have become increasingly prevalent in the partitioning of root water uptake. However, many models fail to incorporate site physical information in a physically meaningful manner, whereas others adopt discrete approaches to segmenting the soil profile rather than continuous approaches that aptly treat the soil as a continuum of physical properties and conditions. Here, we present the novel ‘multimodal physically-based root water uptake isotope mixing estimation’ model (Multi-PRIME). The model utilizes a flexible, continuous and multimodal probability density function in conjunction with water-stable isotopes and additional site physical information, combined in a process-based linear mixing framework. To evaluate the approach, estimates of water uptake from boreal forest <i>Pinus banksiana</i> trees were compared with those of the PRIME and MixSIAR approaches. The models yielded comparable results; however, because of the highly flexible nature of its semi-nonparametric water uptake function, Multi-PRIME reduced the bias and uncertainty associated with soil segmentation of the discrete model MixSIAR and with the specification of parametric functions and initial parameter values of the PRIME model. Furthermore, the multimodal nature of Multi-PRIME provided a superior ability to describe water uptake patterns in cases with multiple potential source regions of uptake. In addition, due to its continuous and process-based nature, Multi-PRIME surpassed the discrete, empirically-based MixSIAR in both accuracy and certainty. These findings illustrate the benefits of adopting a process-based modelling framework that utilizes a semi-nonparametric, continuous and multimodal water uptake function, thereby providing an improvement in our ability to confidently estimate water uptake apportionment.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489748","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}