Ecohydrology最新文献

{"title":"Modelling the ecohydrological plasticity in soil hydraulic properties of Sphagnum mosses","authors":"Colin P. R. McCarter,&nbsp;Vitaly Golubev,&nbsp;Pete Whittington","doi":"10.1002/eco.2701","DOIUrl":"10.1002/eco.2701","url":null,"abstract":"<p><i>Sphagnum</i> mosses are a keystone peatland species whose ecohydrology governs carbon sequestration processes in many peatlands. Globally, there are ~380 <i>Sphagnum</i> species that occupy a wide range of ecohydrological niches (microforms) based on their ability to grow at or above the water table, broadly grouped by hummock (furthest from water table), lawn, and hollow (closest to water table) microforms. The further from the water table a given species can grow is controlled by the ability to effectively retain and transmit water to the capitula (growing surface) during dry periods. However, <i>Sphagnum</i> species can have a relatively plastic ecohydrological niche, often occupying different niches (microforms) in different environments. We used numerical modelling parameterized by previous field and laboratory studies to compare the hydrological function between <i>Sphagnum</i> hummock, lawn, and hollow microforms. We determined (a) how two different organizations of a hummock of <i>Sphagnum fuscum</i> and (b) a lawn or hollow of <i>S. magellanicum</i> (<i>S. divinum/S. medium</i>) or <i>S. rubellum</i> differed between two different overarching climates (sub-humid boreal and humid temperate). The hydrological function, expressed as the cumulative water fluxes, was similar between species and ecohydrological microform (water table position) when water was plentiful, despite differences in soil hydraulic properties of the same species, but began to diverge during a prolonged simulated dry period (30-day drought). These results suggest a single species of <i>Sphagnum</i> moss can exhibit a wide range of soil hydraulic properties (<i>i.e</i>., sphagnum morphology) but have essentially the same consequential hydrology. Only the <i>S. fuscum</i> from the sub-humid climate was hydrologically stressed enough to show differences in the simulated evaporation rates. This study highlights the need for more physical research to determine the sensitivity of <i>Sphagnum</i> spp.'s soil hydraulic properties to overarching hydroclimatic factors so that we can more effectively incorporate these processes into large-scale numerical modelling efforts.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2701","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223131","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":"Using environmental flows to inform integrated water resource management in critically water scarce regions","authors":"P. Mark Graham,&nbsp;Nicholas B. Pattinson,&nbsp;Retha Stassen,&nbsp;Trevor Pike,&nbsp;Nashat A. F. Hamidan","doi":"10.1002/eco.2705","DOIUrl":"10.1002/eco.2705","url":null,"abstract":"<p>Environmental flows (e-flows) assessments are a powerful mechanism for enhancing and conserving the ecosystem goods and services rivers provide while allocating water to essential human use. There is a paucity of e-flows assessments and implementation in water scarce regions such as the Middle East, where limited freshwater resources are under extreme pressure. We conducted a first e-flows assessment of the Mujib River, a vitally important freshwater resource for biodiversity and people in Jordan. We employed a holistic approach based on the building block method (BBM), using expert knowledge, assessment and integration of the hydrology, hydraulics, fish, macroinvertebrates, vegetation, habitat integrity and benthic diatoms of the Mujib River to perform an e-flows determination. Several significant threats to its ecology and fresh water supply were identified. The most significant was the absence of flooding and abstraction associated with upstream impoundments, as well as reliance on over-exploited and severely pressured groundwater-maintained flows. Overall, this paper presents the first e-flows assessment for the Mujib River in Jordan, a vital step towards improved water resource monitoring and management in water scarce regions, and serves to highlight the urgent global need for e-flows to preserve our critical freshwater systems.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2705","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223132","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":"Evolution and driving mechanism of runoff in the Han River basin from 1980 to 2020 under changing environments","authors":"Yulan Luo,&nbsp;Yuxin Liu,&nbsp;Yusheng Wang,&nbsp;Xin Lv,&nbsp;Chuanfu Zang","doi":"10.1002/eco.2708","DOIUrl":"https://doi.org/10.1002/eco.2708","url":null,"abstract":"<p>Recent studies in ecohydrology have focussed on the impact of climate and vegetation changes on runoff. To reveal the hydrological response mechanism under changing environments, this investigation explored the evolution and driving mechanism of <i>Q</i> (the mean annual runoff) in the Han River basin from 1980 to 2020 by combining the Budyko–Porporato–Guswa coupling model and the Soil and Water Assessment Tool (SWAT) model, with scenario analysis and statistical analysis. The results showed that (1) <i>Q</i> was 719.38 mm and showed a fluctuating trend from 1980 to 2020. The spatial distribution was characterised by the largest in the upper Mei River, the second in the Ting River, and the smallest in the lower Mei River and the upper-middle Han River. (2) <i>Q</i> increased with obvious spatial heterogeneity under the impact of climate change and the integrated impact of climate and vegetation changes. (3) <i>Q</i> had the strongest sensitivity to the change in <i>E</i>₀, followed by <i>P</i>, and the weakest was vegetation. <i>Q</i> and <i>E</i>₀ showed a strong correlation. (4) The principal driver for the change in <i>Q</i> was climate change, and the impact of <i>P</i> was greater than <i>E</i>₀. The impact of vegetation variability was the smallest. This paper can serve as a reference for the research of hydrological response to changing environments and an academic foundation for the scheduling of water resources.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143116511","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":"Comment on ‘Estimation of actual evapotranspiration from different ecosystems on the Tibetan Plateau based on a generalised complementary evapotranspiration theory model’ by Dai et al., 10.1002/eco.2635","authors":"Jozsef Szilagyi","doi":"10.1002/eco.2700","DOIUrl":"10.1002/eco.2700","url":null,"abstract":"","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223135","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":"Landscape functioning in reservoir water quality prediction: Current use and predictive capacity","authors":"Ana Paula Portela,&nbsp;João Gonçalves,&nbsp;Ana Sofia Cardoso,&nbsp;Ana Sofia Vaz,&nbsp;Lucas Terres de Lima,&nbsp;Ivo Pinto,&nbsp;Sara Rodrigues,&nbsp;Sara C. Antunes,&nbsp;João Honrado","doi":"10.1002/eco.2702","DOIUrl":"10.1002/eco.2702","url":null,"abstract":"<p>Reservoirs fulfil several societal needs, including water storage, energy production, flood control and recreation. However, the interruption of the river continuum may cause water quality declines that compromise water use. The surrounding landscape is a key driver of water quality variation in space and time, both across and within catchments. Therefore, understanding how landscape composition, structure and functioning influence reservoir water quality can help address management challenges. Here, we aim to investigate the current use and predictive capacity of landscape functioning indicators for reservoir water quality prediction. First, we carried out a literature review to investigate which landscape factors are most frequently studied as drivers of water quality in lentic systems. Then, we tested the predictive capacity of landscape functioning indicators in four reservoirs in Portugal using linear mixed models and multi-model inference. The literature review shows that most studies assess the effects of landscape composition while landscape functioning is rarely included. Our test using four reservoirs suggests that landscape functioning indicators, namely greenness and brightness, can complement landscape composition and structure indicators, improving the capacity to predict total suspended solids, chlorophyll-<i>a</i>, and total phosphorous. Landscape functioning indicators portrayed temporal variability in ecosystem dynamics that was not encompassed by landscape composition or structure indicators and may be relevant to predict specific water quality parameters. Our results show landscape functioning indicators can improve modelling of landscape contributions to water quality and thus have great potential to contribute to monitoring, modelling and forecast systems for water quality and ecological status.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223134","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 the main media of wind and water on the biodiversity pattern of grassland and its driving mechanism in Poyang Lake","authors":"Xue Shang,&nbsp;Wenbo Chen","doi":"10.1002/eco.2707","DOIUrl":"10.1002/eco.2707","url":null,"abstract":"<p>As important media for species diffusion, water and wind are two important factors for grassland biodiversity conservation in lake areas. Exploring their driving mechanism on grassland biodiversity is crucial for maintaining the lake ecosystem's equilibrium. Our study utilizes the data of wind velocity and water level, which are significant performance factors for wind and water respectively in Poyang Lake from 2000 to 2020 to reveal their interannual time-series fluctuation characteristics and their influence mechanism on the grassland biodiversity pattern. Landscape pattern indices and biodiversity indicators, such as the number of patches (NP), patch density (PD), landscape spreading index (CI), landscape fragmentation index (LSD), landscape aggregation index (AI), Simpson diversity index (MSIDI) and Simpson evenness index (MSIEI) were analysed, trend analysis, redundancy analysis and structural equation modelling were applied in this study. The main results were: (1) From 2000 to 2020, Poyang Lake's wind velocity decreased gradually, and the water level first decreased and then rose. NP in Poyang Lake fluctuated substantially, LSD fluctuated frequently and obvious temporal heterogeneity existed. (2) CI and AI increased from low to high value, facilitating species dispersal and migration. The dominant species with high aggregation gradually established stronger connectivity. Moderate spreading degree and aggregation degree maintained high biodiversity and evenness, whereas excessive spreading degree and aggregation degree led to homogenization of species, decrease in biodiversity, reduction in species evenness, and increase in dominance. (3) As the landscape transformed from having no obvious dominant species to being dominated by several dominant species, MSIEI and landscape dominance changed from high to low and low to high respectively. Moreover, the biodiversity shifted from high to low, and species distribution in the landscape shifted from balanced to unbalanced. (4) The effect of water level on PD, AI, LSD, MSIDI and MSIET was significantly higher than that of wind velocity. LSD was mainly regulated by the minimum wind velocity affecting the maximum and average water levels. MSIDI and MSIET were primarily governed by the minimum wind velocity affecting the minimum water level. The minimum water level decreased as the minimum wind velocity increased, and MSIDI and MSIET weakened as the minimum water level decreased.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223136","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":"Different phytoplankton stoichiometry and nutrient status in the reservoirs of Fujian Province, China","authors":"Gohar Ayub,&nbsp;Yuanyuan Zhou,&nbsp;Yuping Su,&nbsp;Luwei Zheng,&nbsp;Yuxin Weng,&nbsp;Sami ur Rahman,&nbsp;Muhammad Zahir","doi":"10.1002/eco.2689","DOIUrl":"10.1002/eco.2689","url":null,"abstract":"<p>Reservoirs have experienced varied degrees of eutrophication in recent years as the effects of climate change and human activities on reservoir ecosystems have intensified. This study looked at the patterns of integrated nutrient status and total phosphorus (TP) concentration in 30 reservoirs in major reservoirs across Fujian Province. Significant connections were identified between TP concentration, trophic status, and total phytoplankton density. 88.9% of the reservoirs were at the middle trophic level by the nutritional status (EI). The average EI of the 25 reservoirs with water supply functions is 39.2, eight reservoirs in coastal areas having EI values more than 45.0. The EI of the Baisha Reservoir in Jiulong River Basin reached 50.3, indicating modest eutrophication. TP concentration levels in the 30 reservoirs of Fujian Province range from 0.01 to 0.08 mg·L⁻¹, representing different functional categories. Algal bloom is more likely to occur in a reservoir with a high nutrient status value. The N/P mass ratios of the 30 reservoirs were all significantly greater than 7.0, with the minimum is 11.0 and the maximum is 136.0, which indicating that these reservoirs were typically phosphorus-limited.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223164","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":"Using stream dissolved oxygen and light relationships to estimate stream primary production on mountainous headwater stream ecosystems","authors":"Sandra R. Villamizar,&nbsp;Catalina Segura,&nbsp;Dana R. Warren","doi":"10.1002/eco.2699","DOIUrl":"10.1002/eco.2699","url":null,"abstract":"<p>Headwater streams influence the carbon cycle, but their productivity estimation remains challenging. We propose the use of dissolved oxygen data (% saturation, DOsat) and on-site photosynthetically active radiation (PAR) data to develop DOsat~PAR curves as an analogy to the well-known photosynthesis–irradiance (P–E) curves. The premise of our research is that although these curves are simple, they provide detailed information of stream ecosystem productivity dynamics. We used data from two streams in the Oregon Coast Range to investigate daily gross primary productivity (GPP). We used properties of the light-limited portion of the DOsat~PAR regression curves to produce a model to estimate GPP. We found that the slope of the DO–PAR relation varied widely between 1.6 × 10⁻⁴ and 0.045 and had strong correlations (<i>r</i>² &gt; 0.78). The data from one of the two study sites (Oak Creek) was used for model development while the data from the other site (South Fork Mill Creek) was used for model validation. The model's ability to quantify the effects of a discrete storm event on stream productivity was tested by comparing GPP estimates calculated through a Bayesian framework (streamMetabolizer) and our raw data-driven estimates of GPP which were based on the variability of the DOsat~PAR regression curves. The proposed methodology was successful in estimating GPP in headwaters. We foresee that this method may be used to assess disturbances and construct a baseline understanding of productivity dynamics in other headwater ecosystems that is independent of the methodological challenges of the current stream metabolism models.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929261","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":"Downstream decreases in water availability, tree height, canopy volume and growth rate in cottonwood forests along the Green River, southwestern USA","authors":"Richard Thaxton,&nbsp;Michael L. Scott,&nbsp;John T. Kemper,&nbsp;Sara L. Rathburn,&nbsp;Sabrina Butzke,&nbsp;Jonathan M. Friedman","doi":"10.1002/eco.2693","DOIUrl":"10.1002/eco.2693","url":null,"abstract":"<p>Hydrologic stress is increasing in Fremont cottonwood (<i>Populus fremontii</i>) forests across the southwestern United States because of increased temperature and streamflow diversion. The spatial variability of this stress is large yet poorly understood. Along the Yampa and Green Rivers in Colorado and Utah, vapour pressure deficit and flow diversions increase downstream. To investigate effects of this gradient on cottonwoods, we measured the percent live canopy and height of randomly selected trees at three sites: Deerlodge Park on the Yampa River (DLP), Island Park on the upper Green (ILP) and Canyonlands National Park on the lower Green (CAN). From these same trees, we took increment cores to understand differences in tree growth in each forest over time. We then related tree metrics to local water availability, streamflow and climatic data. Cottonwoods at CAN were shorter and had lower percent live canopy and growth rate than similarly aged trees upstream. CAN trees that grew higher above the water surface also tended to have lower tree growth, height and live canopy percentage. Furthermore, the correlation between tree growth and maximum vapour pressure deficit showed a much stronger negative shift since 1990 at CAN than at the other sites. All of these differences suggest higher hydrologic stress at CAN, which we attribute to the combined effects of peak flow declines from Flaming Gorge Reservoir, flow diversion and the higher and increasing vapour pressure deficit at CAN. Further research on the variability of hydrologic stress on cottonwoods could help managers anticipate and mitigate the effects of drought stress in these iconic forests.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947100","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":"Estimating changes in streamflow attributable to wildfire in multiple watersheds using a semi-distributed watershed model","authors":"Ryan Wells,&nbsp;Kyle R. Mankin,&nbsp;Jeffrey D. Niemann,&nbsp;Holm Kipka,&nbsp;Timothy R. Green,&nbsp;David M. Barnard","doi":"10.1002/eco.2697","DOIUrl":"10.1002/eco.2697","url":null,"abstract":"<p>More than half of water supply in the western United States is sourced from forested lands that are increasingly under wildfire risk. Studies have begun to isolate the effects of wildfire on streamflow, but they have typically used coarse temporal resolutions that cannot account for the numerous, interconnected watershed processes that control the responses to rainfall events. In this study, we employed a method to isolate fine-scale (daily) effects of fire. Wildfire effects were estimated as the difference between measured post-fire streamflow and unburned scenarios of post-fire streamflow simulated by a hydrologic model calibrated to pre-fire conditions. The method was applied to track hydrologic recovery after wildfires in six burned watersheds across the western United States: North Eagle Creek, NM (2012 Little Bear Fire), Lopez Creek, CA (1985 Las Pilitas Fire), City Creek, Devil Canyon Creek, East Twin Creek, and Plunge Creek, CA (2003 Old Fire). All six watersheds experienced prolonged increases of post-fire streamflow, with the most consistent changes occurring during periods of low streamflow. Following 6 years of increased streamflow, Lopez Creek experienced 6 years of reduced streamflow before returning to the pre-fire hydrologic regime. North Eagle Creek and the four watersheds affected by the Old Fire continued to have elevated streamflow 9 and 18 years post-fire, respectively, without returning to the pre-fire hydrologic regime.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 7","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2697","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946993","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}