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A Stochastic Model to Predict Seed Dispersal in Linear and Stokes Waves
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-28 DOI: 10.1002/eco.2746
Jun Chen, Yuhong Zeng, Junqing Ren, Xiaoguang Liu
{"title":"A Stochastic Model to Predict Seed Dispersal in Linear and Stokes Waves","authors":"Jun Chen,&nbsp;Yuhong Zeng,&nbsp;Junqing Ren,&nbsp;Xiaoguang Liu","doi":"10.1002/eco.2746","DOIUrl":"https://doi.org/10.1002/eco.2746","url":null,"abstract":"<div>\u0000 \u0000 <p>Plant cultivation is utilized in coastal ecological restoration to cope with shrinking wetlands, and, benefiting from hydrochory, disseminating indigenous plant seeds represents a high-efficiency strategy. Random displacement model (RDM) is an efficient alternative to simulate seed dispersal progress via wave. Consequently, we investigated the effect of seed properties and wave characteristics on seeds motion in waves by RDM. Errors between the theoretical comprehensive longitudinal diffusion coefficient of the solute and the simulated one by RDM within an acceptable range indicate that the model is applicable for further simulation of particle dispersal in waves. Simulation results demonstrated that seeds with smaller size and density can transport farther in waves; larger wave heights, smaller water depths and longer wavelengths in linear waves and larger relative wave heights and smaller relative water depths in Stokes waves all promote longitudinally seed diffusion. Finally fitting formulas were proposed for the longitudinal propagation position (including mean and variance) of seed dispersal in linear and Stokes waves. Although this work can provide certain scientific guidance for the restoration of coastal vegetation ecology through natural colonization, there is still much work that needs to be conducted to further the research.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143690208","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
Modelling the Effects of Vegetation Distribution and Density on Hydrological Connectivity and Water Age in a River Delta
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-27 DOI: 10.1002/eco.2741
Madoche Jean Louis, Matthew Hiatt
{"title":"Modelling the Effects of Vegetation Distribution and Density on Hydrological Connectivity and Water Age in a River Delta","authors":"Madoche Jean Louis,&nbsp;Matthew Hiatt","doi":"10.1002/eco.2741","DOIUrl":"https://doi.org/10.1002/eco.2741","url":null,"abstract":"<p>Water transport timescales (WTTs) quantify how long it takes for water to travel through or remain in a system and are often cast as indicators of ecosystem function and health. Such timescales are known to be affected by vegetation in various environments. We quantify the impact of floodplain vegetation on WTTs within the Wax Lake Delta (WLD), a river delta system in Louisiana, USA, using a high-resolution Delft3D Flexible Mesh (DFM) model incorporating vegetation-induced flow resistance. We show that increased vegetation density leads to extended WTTs within vegetated sections of WLD while fostering flow localization and accelerating transport within distributary channels. We find that the presence or absence of floodplain vegetation significantly influences the volumetric flow directed towards the floodplain, with spatial distribution exerting more control than vegetation density. Vegetation density and spatial arrangement have minimal impact on flow directed out of the deltaic floodplain, indicating that vegetation does not constrain flow across the bayward boundary. Furthermore, network-scale water age distribution remains largely unaffected by vegetation density and spatial arrangement, except for slight modifications in the distribution's right tail. These findings contribute to a better understanding of how vegetation affects deltaic hydrology across scales, highlighting the importance of considering multi-scale vegetation influences for coastal restoration and management strategies.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2741","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707246","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
Effects of Burning Severity and Root System on Herb Land Surface Evapotranspiration: A Study Based on Prescribed Fire in Southwest China
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-23 DOI: 10.1002/eco.2747
Kemin Liu, Lunjiang Wang, Lingqiu An, Jing Yang, Chuandai Miao, Yong Xian
{"title":"Effects of Burning Severity and Root System on Herb Land Surface Evapotranspiration: A Study Based on Prescribed Fire in Southwest China","authors":"Kemin Liu,&nbsp;Lunjiang Wang,&nbsp;Lingqiu An,&nbsp;Jing Yang,&nbsp;Chuandai Miao,&nbsp;Yong Xian","doi":"10.1002/eco.2747","DOIUrl":"https://doi.org/10.1002/eco.2747","url":null,"abstract":"<div>\u0000 \u0000 <p>Post-fire evapotranspiration (ET) exerts a significant influence on soil moisture dynamics and thus vegetation recovery in, particularly, karst ecosystems in southwest China. Despite the widespread use of remote sensing and mathematical modelling to estimate large-scale land surface post-fire ET, few studies directly examine how burn severity and vegetation species affect small-scale ET. This study bridges the gap by conducting two experiments. In the first experiment, lysimeters containing <i>Artemisia Iavandulifolia</i> and <i>Miscanthus sinensis</i> (with tap and fibrous root systems, respectively) were grown for 2.5 years, followed by prescribed burning with varying severities (low, moderate and high). Post-fire ET was monitored over 1-year period, with unburned control for comparison. In the second experiment, the soil surface burns were carried out to assess ET under three surface conditions: burned surface with ash cover (BSA), burned surface without ash cover (BO) and unburned surface with ash cover (UA). The ET was measured using the mass change method, and atmospheric and soil moisture were also collected. Results indicated that prescribed fire reduced post-fire post-fire ET by up to 46%–62%, depending on both fire severity and herb species. On low and moderate burning severities surfaces, ET from <i>Miscanthus sinensis</i> was greater than that with <i>Artemisia Iavandulifolia</i>. But, in high-burning severity conditions, the opposite was true. This shift was due to varying heating depth of burn and root distribution of the two herbs. ET varied depending on atmosphere conditions. The dependence declined with the fire severity. The biomass and ash coverage were not significantly related to ET. However, decreasing evaporation was detected as the burning severity increased for the BSA and BO. These results suggested that the post-fire changes in soil properties were a key driver of ET dynamics.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689807","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
The Space–Time Representation of Extraordinary Rainfall Events
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-19 DOI: 10.1002/eco.2742
Salvatore Manfreda
{"title":"The Space–Time Representation of Extraordinary Rainfall Events","authors":"Salvatore Manfreda","doi":"10.1002/eco.2742","DOIUrl":"https://doi.org/10.1002/eco.2742","url":null,"abstract":"<p>Extraordinary events are rarely observable in a single rainfall gauge, and this make extremely challenging the correct prediction of their arrivals. However, it may be possible to develop a more robust approach by employing a space–time modelling scheme that is able to capture the spatial dynamics of such phenomena. Therefore, a space–time Poisson model of rainfall cells with circular shape and random depth has been exploited for the first time to interpret the behaviour of this family of extraordinary events. This category of events that may be connected to larger meteorological phenomena not necessarily connected with local heterogeneity of the landscape. Following the identification of the observed extraordinary event across southern Italy, six zones with significantly different dynamics in terms of the frequency of such extremes were identified. Subsequently, a simple mathematical representation was adopted to calibrate the model parameters, leading to an estimate of regional probability distributions defined on the space–time occurrences of extraordinary events over homogeneous zones. The approach allows to overcome the limitations posed by point observations allowed the definition of a probability distribution that pertains to an entire area rather than just a point. The obtained quantiles of rainfall estimated seems to align well with the upper bound of the probability distribution of the annual maxima observed over the areas of interests.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2742","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707552","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
Pumping Groundwater to Create Cold-Water Thermal Refuges in Warming Rivers
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-14 DOI: 10.1002/eco.2739
Kathryn A. Smith, Barret L. Kurylyk
{"title":"Pumping Groundwater to Create Cold-Water Thermal Refuges in Warming Rivers","authors":"Kathryn A. Smith,&nbsp;Barret L. Kurylyk","doi":"10.1002/eco.2739","DOIUrl":"https://doi.org/10.1002/eco.2739","url":null,"abstract":"<p>Thermal refuges in rivers and streams provide critical habitat for cold-water species during periods of thermal stress. In this study, we created a new cold-water thermal refuge by pumping cool groundwater to a warm coastal river in Nova Scotia, Canada. Thermal infrared imagery revealed a notable thermal plume, measuring approximately 55 m<sup>2</sup> at the water surface during low-flow conditions, with mixing limited by the installation of a flow deflector. Above-water and underwater cameras recorded several fish utilizing the created cold-water plume during periods of high ambient river temperatures (up to 30°C). Thermal numerical modelling was conducted to interpret the field data and assess the impact of alternative designs and conditions. Model results revealed that the extent of the created thermal plume substantially increased (+202%) with the use of a deflector and that the plume size was controlled by several factors including the river flow rate and temperature, the pumping rate and the groundwater temperature. The study findings demonstrate the efficacy of creating cold-water habitat in the face of a warming climate and lay the foundation for future proactive thermal management strategies aimed at maintaining thermal diversity in warming rivers.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688944","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
The Habitat Alteration of Corrigiola Litoralis L. (Strapwort) on the Elbe River Driven by Climate Change
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-14 DOI: 10.1002/eco.2730
Vojtěch Havlíček, Martin Heřmanovský, Luděk Bureš, Marta Martínková, Jan Čuda, Martin Hanel
{"title":"The Habitat Alteration of Corrigiola Litoralis L. (Strapwort) on the Elbe River Driven by Climate Change","authors":"Vojtěch Havlíček,&nbsp;Martin Heřmanovský,&nbsp;Luděk Bureš,&nbsp;Marta Martínková,&nbsp;Jan Čuda,&nbsp;Martin Hanel","doi":"10.1002/eco.2730","DOIUrl":"https://doi.org/10.1002/eco.2730","url":null,"abstract":"<div>\u0000 \u0000 <p>This study aims to determine the possible future development of areas suitable for <i>Corrigiola litoralis</i> L. (strapwort) at six research sites on the part of the Elbe River near the border with Germany under considered climate change. We have combined hydrological and hydraulic approaches with outputs from climate models representing future climate patterns to meet these objectives. The hydrological models used in this study were BILAN, GR4J and TUW, while the hydraulic calculations were performed using HEC-RAS. Climate data were derived from 216 climate models and grouped according to the projected change in mean temperature. Areas suitable for strapwort were identified based on conditions that reflect the ecological requirements of the species. The results show that increasing average temperatures and subsequent water level fluctuations will increase the number of seasons suitable for strapwort and its area of occurrence. These areas will emerge above water level for a longer period, extending the growing season of strapwort and increasing its reproductive capacity. At the same time, winter flooding of the sites will remain, which is likely to suppress perennial species that would competitively exclude strapwort. Regarding hydrological models, GR4J and TUW were consistent in their results. In contrast, due to the different structure, the BILAN model showed a different response to rainfall inputs, and the results were inconsistent with those of the above models. This finding highlights the need to select an appropriate hydrological model. In contrast, the sensitivity of the results to climate model variability was found to be relatively low.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632803","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
Flow Resistance Coefficient Under Rigid Vegetation Coverage: An Experimental Study
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-12 DOI: 10.1002/eco.2737
Zekang Cai, Jian Wang, Jiabo Xie, Chenfeng Wang
{"title":"Flow Resistance Coefficient Under Rigid Vegetation Coverage: An Experimental Study","authors":"Zekang Cai,&nbsp;Jian Wang,&nbsp;Jiabo Xie,&nbsp;Chenfeng Wang","doi":"10.1002/eco.2737","DOIUrl":"https://doi.org/10.1002/eco.2737","url":null,"abstract":"<div>\u0000 \u0000 <p>Rigid vegetation is prevalent in the Loess Plateau region. Most simulation studies assume that vegetation grows perpendicularly to the slope surface (BS), overlooking the influence of growth perpendicular to the horizontal plane (BH) on the slope flow resistance coefficient. Therefore, this study explores the effects of rigid vegetation on the slope flow resistance coefficient by conducting indoor simulated scouring experiments under different vegetation coverage (0–15.89%), two growth directions (BS and BH), four slopes (5°, 10°, 15° and 20°), and five flow rates (5, 10, 20, 30 and 40 L·min<sup>−1</sup>). The results showed that the resistance coefficient increased non-linearly with vegetation coverage; however, the growth rate slowed with increasing slope at high coverage, showing a decreasing trend. The resistance coefficient under BS conditions was generally higher than that under BH conditions. As the coverage increased (0–15.89%), the resistance coefficient under BS conditions became 1.51–1.99, 1.1–1.26 and 1.52–1.59 times that under BH conditions. The resistance coefficient ratio <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>ϕ</mi>\u0000 </mrow>\u0000 <annotation>$$ phi $$</annotation>\u0000 </semantics></math> negatively correlated with the flow rate and water depth and positively with the slope. Furthermore, the relationship between the Reynolds number (<i>Re</i>) and resistance coefficient under BS and BH conditions significantly differed, with a negative correlation under BS conditions and a positive one under BH conditions. The Froude number (<i>Fr</i>) exhibited a strong negative correlation with the resistance coefficient, and the impact became more significant as vegetation coverage increased. Through dimensional analysis and nonlinear fitting, a high-precision resistance coefficient prediction model (<i>adjR</i><sup><i>2</i></sup> = 0.98, <i>NSE</i> = 0.99, <i>RRMSE</i> = 0.04) was developed, which provided theoretical support for engineering designs and enhancing soil and water conservation strategies on the Loess Plateau.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688869","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
How Emergent Vegetation Patch Shapes Affect Flow Structure in Open Channel Environments
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-08 DOI: 10.1002/eco.2740
Naveed Anjum, Ghufran Ahmed Pasha, Jawad Ashraf, Usman Ghani, Fakhar Muhammad Abbas, Md Abedur Rahman
{"title":"How Emergent Vegetation Patch Shapes Affect Flow Structure in Open Channel Environments","authors":"Naveed Anjum,&nbsp;Ghufran Ahmed Pasha,&nbsp;Jawad Ashraf,&nbsp;Usman Ghani,&nbsp;Fakhar Muhammad Abbas,&nbsp;Md Abedur Rahman","doi":"10.1002/eco.2740","DOIUrl":"https://doi.org/10.1002/eco.2740","url":null,"abstract":"<div>\u0000 \u0000 <p>Vegetation patches, which naturally occur in a variety of patterns, have an impact on the flow dynamics and geometry of rivers. There have been prior studies on vegetation patches, but none have examined the impact of differently shaped vegetation patch, i.e., circle, square and rectangle, and the comparison of these varying patch shapes from an ecological point of view. Hence, a computational fluid dynamics (CFD) technique using FLUENT has been employed in the present research to evaluate the flow dynamics and turbulence characteristics around emergent vegetation patches of various forms in an open channel. The results show that the shape of vegetation patches had a significant impact on the approaching flow, with circular patch offering the highest flow resistance among all other configurations. Flow shedding behaviour behind the patch was also prominent in the case of circular patch shape with a formation of large Kármán vortex street with vortex sizes up to 1.5 times the patch diameter. In the downstream region of vegetation patch, a reduction of 25%–30% in the mean streamwise velocity was observed for circular patch, whereas a 15% decrease was observed for rectangular and square patches. The outcomes of this study found that flow turbulence and stability in the open channel are significantly influenced by vegetation patch shape. This research reveals that the shape of vegetation patches, particularly circular configuration, significantly influences flow dynamics, thereby enhancing habitat complexity in riverine ecosystems. These findings are vital for developing informed river restoration and management strategies that support biodiversity and promote ecological resilience.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688767","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
How Can Unique Alkaline Soda Waters Be Managed and Restored? Lake Neusiedl as the Largest Threatened European Example
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-07 DOI: 10.1002/eco.2738
Emil Boros, Lajos Vörös
{"title":"How Can Unique Alkaline Soda Waters Be Managed and Restored? Lake Neusiedl as the Largest Threatened European Example","authors":"Emil Boros,&nbsp;Lajos Vörös","doi":"10.1002/eco.2738","DOIUrl":"https://doi.org/10.1002/eco.2738","url":null,"abstract":"<p>Inland alkaline soda waters (ASW), such as Lake Neusiedl (LN), represent some of the most stable alkaline natural environments and unique ecosystems on Earth. Their European hotspot is located in Central Europe, where LN stands as the largest threatened representative, giving it practical importance. This study aims to compare fundamental hydro-ecological variables of LN, including a habitat restoration site (LNres), with intermittent alkaline soda waters (IASW) in the adjacent subregion (Seewinkel). IASW serves as a characteristic close-to-nature reference status for natural ASW in order to restoration suggestions for LN. Variables investigated include depth, dissolved oxygen, pH, conductivity, algae-free suspended solids, chromophoric dissolved organic matter and chlorophyll <i>a</i>. Significant differences were found among most variables between the three sites (Kruskal–Wallis ANOVA and Dunn's test), except for water depth, DO, conductivity, TSS-Algfree and CHL between IASW and LNres, and CDOM between LNres and LN. Principal component analyses revealed that LNres is situated between LN (semi-static) and reference IASW (astatic), supporting the hypothesis that LNres is closer to the reference IASW than the non-restored part of LN. The hydro-ecological properties of IASW and LNres are similar to the shallow shoreline of LN, suggesting that management strategies of intermittent waters can be applied to shoreline restoration of semi-static waters. This can be achieved by restoring seasonal water dynamics and groundwater function through extensive wetland rehabilitation in the above-ground and below-ground watershed recharge area of LN. Additionally, extensive vegetation control (reed) should be implemented to prevent ASW from impacting the habitat and freshwater exchange.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2738","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688666","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
Woody Encroachment Modifies Subsurface Structure and Hydrological Function
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-11-04 DOI: 10.1002/eco.2731
Karla M. Jarecke, Xi Zhang, Rachel M. Keen, Marc Dumont, Bonan Li, Kayalvizhi Sadayappan, Victoria Moreno, Hoori Ajami, Sharon A. Billings, Alejandro N. Flores, Daniel R. Hirmas, Matthew F. Kirk, Li Li, Jesse B. Nippert, Kamini Singha, Pamela L. Sullivan
{"title":"Woody Encroachment Modifies Subsurface Structure and Hydrological Function","authors":"Karla M. Jarecke,&nbsp;Xi Zhang,&nbsp;Rachel M. Keen,&nbsp;Marc Dumont,&nbsp;Bonan Li,&nbsp;Kayalvizhi Sadayappan,&nbsp;Victoria Moreno,&nbsp;Hoori Ajami,&nbsp;Sharon A. Billings,&nbsp;Alejandro N. Flores,&nbsp;Daniel R. Hirmas,&nbsp;Matthew F. Kirk,&nbsp;Li Li,&nbsp;Jesse B. Nippert,&nbsp;Kamini Singha,&nbsp;Pamela L. Sullivan","doi":"10.1002/eco.2731","DOIUrl":"https://doi.org/10.1002/eco.2731","url":null,"abstract":"<div>\u0000 \u0000 <p>Woody encroachment—the expansion of woody shrubs into grasslands—is a widely documented phenomenon with global significance for the water cycle. However, its effects on watershed hydrology, including streamflow and groundwater recharge, remain poorly understood. A key challenge is the limited understanding of how changes to root abundance, size and distribution across soil depths influence infiltration and preferential flow. We hypothesised that woody shrubs would increase and deepen coarse-root abundance and effective soil porosity, thus promoting deeper soil water infiltration and increasing soil water flow velocities. To test this hypothesis, we conducted a study at the Konza Prairie Biological Station in Kansas, where roughleaf dogwood (<i>Cornus drummondii</i>) is the predominant woody shrub encroaching into native tallgrass prairie. We quantified the distribution of coarse and fine roots and leveraged soil moisture time series and electrical resistivity imaging to analyse soil water flow beneath shrubs and grasses. We observed a greater fraction of coarse roots beneath shrubs compared to grasses, which was concurrent with greater saturated hydraulic conductivity and effective porosity. Half-hourly rainfall and soil moisture data show that the average soil water flow through macropores was 135% greater beneath shrubs than grasses at the deepest B horizon, consistent with greater saturated hydraulic conductivity. Soil-moisture time series and electrical resistivity imaging also indicated that large rainfall events and greater antecedent wetness promoted more flow in the deeper layers beneath shrubs than beneath grasses. These findings suggest that woody encroachment alters soil hydrologic processes with cascading consequences for ecohydrological processes, including increased vertical connectivity and potential groundwater recharge.</p>\u0000 </div>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"18 2","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632933","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
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