Watershed Ecology and the Environment最新文献

{"title":"Assessment of the impacts of climate change on drought intensity and frequency using SPI and SPEI in the Southern Pre-Balkash region, Kazakhstan","authors":"Alimkulov Sayat ,&nbsp;Makhmudova Lyazzat ,&nbsp;Talipova Elmira ,&nbsp;Baspakova Gaukhar ,&nbsp;Monkayeva Gulsara","doi":"10.1016/j.wsee.2024.12.001","DOIUrl":"10.1016/j.wsee.2024.12.001","url":null,"abstract":"<div><div>This paper presents a study of droughts in the South Pre-Balkash region that considers climate change and its impact on the intensity and frequency of drought periods. The main objective of this study is to assess changes in climatic parameters and their impact on the development of droughts using standardized precipitation indices (SPI) and precipitation evapotranspiration (SPEI) for the period 1950–2023. Long-term rainfall and temperature data and remote sensing data from the Google Earth Engine platform were used for the analysis. The Mann-Kendall test was applied to assess trends in climatic conditions and drought characteristics.</div><div>The results showed that although both the SPI and SPEI can be used to assess droughts, the SPEI is more effective at capturing changes in air temperature increases. The intensity and frequency of drought periods increased after the 1990 s, especially as measured by the SPEI. Additionally, the results of the present study indicate an increase in the intensity and frequency of dry periods, which is associated with climate change. In the study area, climate change is characterised mainly by an increase in air temperature (0.17–0.39 °C/10 years). The SPEI index is more sensitive to changes in the water balance, as it takes into account the influences of both precipitation and evaporation, in contrast to the SPI index, which considers only the influence of precipitation. Consequently, when drought conditions are analyzed using the SPEI index, a more accurate representation of the depth and severity of drought is obtained. These findings have important implications for the development of adaptation measures in agriculture and water management in the context of increasing drought risk in the Southern Pre-Balkash region.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 11-22"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transforming desalination brine into highly reactive magnesium oxide and life cycle analysis","authors":"Hasanthi L. Senevirathna ,&nbsp;W.P. Cathie Lee ,&nbsp;Shunnian Wu ,&nbsp;Kewu Bai ,&nbsp;Ping Wu","doi":"10.1016/j.wsee.2025.01.001","DOIUrl":"10.1016/j.wsee.2025.01.001","url":null,"abstract":"<div><div>The sustainable production of magnesium oxide (MgO) from reject brine at a desalination facility in Singapore presents a promising alternative to traditional building materials. This study investigates the properties and extraction methods of MgO derived from reject brine, focusing on environmental sustainability and resource efficiency. By utilizing a combination of thermodynamic modelling of concentrated salt aqueous solutions and experimental validation, we optimized the recovery process for Mg²⁺ from reject brine, achieving an impressive 99 % recovery rate to produce MgO with ∼ 98 % purity. The MgO produced, calcined at 700 °C, exhibits high reactivity and a large surface area of 58.01 m²/g, making it a highly viable option for various industrial applications. This approach addresses reject brine disposal challenges and emphasizes brine valorization, aligning with strict environmental regulations by treating both freshwater and concentrated brine as valuable products. The technology enables cost-effective reject brine treatment by recycling Mg²⁺ to produce sustainable Mg-based materials. A comprehensive Life Cycle Assessment (LCA) was conducted to evaluate the environmental impact of MgO production from reject brine. This analysis provides a thorough examination of the transformation process, assessing the sustainability of employing MgO in commercial applications. The findings of this study offer valuable insights for enhancing sustainability in various sectors, underscoring the promise of MgO as an environmentally friendly and cost-effective material.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 36-46"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining the role of Indonesian major fishing ports on contributing to ocean macroplastic pollution","authors":"Tri Yuwono ,&nbsp;Mutiara Rachmat Putri ,&nbsp;Susanna Nurdjaman ,&nbsp;Sakti Wahyu Trenggono ,&nbsp;Kamaluddin Kasim","doi":"10.1016/j.wsee.2025.03.001","DOIUrl":"10.1016/j.wsee.2025.03.001","url":null,"abstract":"<div><div>Plastic pollution in marine environments remains a critical global challenge, with Indonesia playing a significant role due to its extensive fisheries sector. Fishing ports contribute substantially to this issue through waste generated from vessel operations, fish processing, port activities, and riverine pollution. This study examines macro plastic waste production and its sources at four major Indonesian fishing ports—PPS Nizam Zachman (Jakarta), PPN Cilacap, PPN Kejawanan (Cirebon), and PPN Sibolga (North Sumatra)—by integrating field surveys and stakeholder discussions. The results indicate that plastic waste generation varies significantly across ports, with PPS Nizam Zachman producing the highest amount at an average of 700 kg per month, followed by PPN Cilacap (170 kg) and PPN Kejawanan (72 kg). Additionally, riverine plastic pollution plays a critical role in plastic accumulation, particularly at ports near urban river systems. Despite existing regulatory frameworks, including MMAF Decree No. 130 of 2023, challenges persist in waste management due to financial constraints, weak enforcement, and inadequate infrastructure. Based on the research findings, the most effective strategies for mitigating plastic pollution at fishing ports include expanding and institutionalizing waste retrieval programs by linking vessel permits (Surat Layak Operasi/SLO) to waste management compliance, improving waste management infrastructure through public–private partnerships, and strengthening multi-stakeholder collaboration among port authorities, regulatory bodies, and local governments. Additionally, integrating riverine waste management into coastal strategies—such as installing floating trash barriers and enhancing upstream waste collection—is crucial to reducing plastic influx into fishing ports. Community engagement and education initiatives, including waste bank programs and awareness campaigns targeting fishers and port workers, are also essential for long-term sustainability. The findings emphasize the urgent need for an integrated waste management system that aligns regulatory enforcement, infrastructure development, and community participation to promote sustainability in Indonesia’s fisheries sector. Addressing these challenges through coordinated government and stakeholder action is paramount to reducing plastic waste leakage into the marine environment and ensuring long-term ecological and economic sustainability.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 74-83"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chronological development of environmental protection and sustainable development in Ethiopia: Systematic review","authors":"Tsegay Kahsay Gebrekidan ,&nbsp;Muuz Gebretsadik Gebremariam ,&nbsp;Meaza Kidane Teferi ,&nbsp;Selama Gebreslassie Yebyo","doi":"10.1016/j.wsee.2025.01.002","DOIUrl":"10.1016/j.wsee.2025.01.002","url":null,"abstract":"<div><div>Sustainable development aims to meet the needs of the present generation without compromising the ability of future generations to meet their own needs. It encompasses the continuous growth of political, cultural, economic, social, and environmental sectors. This review investigates the historical progress and actions of sustainable development in Ethiopia by examining various published and unpublished documents, government reports, policies, and legislation. The findings highlight that Ethiopia, with a longstanding history of environmental protection practices such as establishing protected areas, soil and water conservation, and sanitation, has made notable progress, especially since the mid-1990s. The inclusion of environmental rights in the 1995 Constitution led to the development of comprehensive policies, strategies, proclamations, regulations, and guidelines for sustainable development. Despite these advancements, Ethiopia faces numerous environmental challenges, including land degradation, climate change, deforestation, pollution, and inadequate implementation of environmental policies. These issues are further complicated by political instability, financial constraints, a lack of skilled human resources, rapid population growth, traditional agricultural practices, and weak community awareness. However, opportunities for improvement exist. Ethiopia can enhance its environmental goals by utilizing hydropower, investing in solar and wind energy, promoting sustainable agriculture, and accessing international climate finance. Nevertheless, the actions taken by the government and individuals have been inconsistent and scattered, leading to unsuccessful efforts to achieve sustainable development. Moving forward, addressing these persistent challenges requires coordinated efforts, political stability, innovative solutions, and public involvement. Strengthening institutional arrangements, enhancing education and awareness, and fostering collaboration at all levels are essential steps toward achieving sustainable development and environmental protection in Ethiopia.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 47-57"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil quality assessment and land capability evaluation for determining integrated watershed management model through SWOT analysis and AHP method in Arjasa Sub-watershed, Indonesia","authors":"Bambang Hermiyanto ,&nbsp;Cindia Mawarni ,&nbsp;Sugeng Winarso ,&nbsp;Subhan Arief Budiman","doi":"10.1016/j.wsee.2025.02.001","DOIUrl":"10.1016/j.wsee.2025.02.001","url":null,"abstract":"<div><div>Arjasa sub-watershed is the upstream area of Bedadung watershed, playing a significant role in Jember Regency. Damage to this area can be caused by inappropriate land use and management, leading to a<!--> <!-->substantial reduction in the health of Bedadung watershed. Despite the significant role, there is no information on the level of soil quality and land capability in Arjasa sub-watershed that can be used for condition monitoring. Furthermore, there is a lack of previous analysis on determining the integrated watershed management model (IWMM). Therefore, this study aims to define the level of soil quality and land capability classes (LCC) as well as construct appropriate IWMM through SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis and AHP (Analytical Hierarchy Process) method. The research revealed that the average SQI ranges between the low category (0.38) in cluster 3, medium (0.49 – 0.53) in clusters 1, 2, 5, 6, 7, and the good category (0, 77) in cluster 4. The indicators determining SQI included in MDS are Ca, organic C, pH H2O, and base saturation, respectively. Apart from that, this research identified four LCCs, namely classes IV, VI, VII, and VIII with the main limiting factors being permeability, erosion rate, and slope. Class IV is found in cluster 1 and Cluster 7 with a total area of 626.6 ha (18.6 %). Class VI is found in cluster 5 with a total area of 107.6 ha (3.2). Class VII is found in clusters 2, 3, and 6 with a total area of 2,132.1 ha (63.4 %). Meanwhile, Class VIII is in cluster 4 with a total area of ​​497.8 ha (14.8 %). From the aspect of land capability, only clusters 1 and 7 can be used for agricultural cultivation, while the other clusters are not suitable for agricultural land. It was concluded that the main priority of IWMM models those suitable to the characteristic of the research site is law enforcement against offenders of illegal logging and inappropriate land use practices.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 104-118"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrochemical characteristics, water quality and diatom assemblage in Dordi River, Nepal","authors":"Punam Phuyal ,&nbsp;Shraddha Ranabhat ,&nbsp;Sanjal Khatri ,&nbsp;Nabin Lamichhane ,&nbsp;Ramesh Raj Pant ,&nbsp;Lal Bahadur Thapa ,&nbsp;Ram Kailash Prasad Yadav","doi":"10.1016/j.wsee.2024.12.002","DOIUrl":"10.1016/j.wsee.2024.12.002","url":null,"abstract":"<div><div>Understanding hydrochemistry and diatom assemblage is important for assessing the health of aquatic ecosystems. This study has analyzed the water quality and diatom communities in the Dordi River, which is one of the major tributaries of the Marsyangdi River in Nepal. The primary research question being addressed in the study was what is the state of water quality parameters of Dordi River and how do they relate to the distribution and composition of diatoms. The water quality parameters of the river like temperature, pH, electric conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), turbidity, and total alkalinity (TA) were measured <em>in-situ</em>, whereas concentrations of major ions (Ca²⁺, Mg²⁺, K⁺, Na⁺, NH₄⁺, HCO₃^–, Cl^–, SO₄^2–, NO₃^–, and PO₄^3–), biological oxygen demand (BOD) and chemical oxygen demand (COD) were analyzed in the laboratory by collecting water samples from different parts of the river. Piper plot, Gibbs plot, Mixing plots, redundancy analysis, and principal component analysis were applied for evaluating the spatial variation of anions and cations in water. The results showed alkaline water following the pattern: Ca²⁺&gt;Mg²⁺&gt;Na⁺&gt;K⁺&gt;NH₄⁺ for cation and HCO₃^–&gt;Cl^–&gt;SO₄^2–&gt;PO₄^3–&gt;NO₃^– for anion with calcium-bicarbonate dominant lithology in the river. Overall, the results highlight that the drinking and irrigation water qualities of the river were found to be excellent. Additionally, among 75 diatom species observed in the samples, the Bacillariophyceae was the dominant class covering 92% of the species. The results indicated that the diatom species richness declined as elevation increased. The distribution of diatoms was also influenced by the land use types near the water sampling points, tributaries and the main river. Overall, the physico-chemical quality of water showed significant influence on diatom species composition. The findings of this study could be useful for understanding hydrochemistry and association of water quality and diatoms in river basins of the Himalaya.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 23-35"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flash flood susceptibility assessment using geospatial technology-based morphometric analysis in Waya watershed, Volta River basin, Ghana","authors":"Bismark Mensah-Brako ,&nbsp;Francis Ampiaw ,&nbsp;Richard Kotei ,&nbsp;Philip Kyaku","doi":"10.1016/j.wsee.2025.02.002","DOIUrl":"10.1016/j.wsee.2025.02.002","url":null,"abstract":"<div><div>The present study aims to assess the flash flood susceptibility of Waya watershed in the Lower Volta River Basin, Volta region, Ghana using geospatial technology-based morphometric analysis. Morphometric characteristics were determined using Advanced Spaceborne Thermal Emission and Reflection Radiometer DEM (30 m) in a GIS 10.7 environment. The morphometric ranking method was applied to prioritize sub-watersheds' susceptibility to flash floods. The results revealed that the watershed is a seventh-order drainage system with a dendritic drainage pattern. The mean bifurcation ratio (4.48), and form factor (0.20) are indicative of higher levels of surface runoff and high flash flood events. The stream frequency (3.27–4.14 km²), drainage density (2.24–2.51 km/km²), and infiltration number (8.05–10.22 km³) showed higher runoff and flash floods. Watershed relief (553 m), relative relief (194.4), ruggedness number (1.36), and mean slope (10.31 %) are indicative of flash flood susceptibility. The results further showed that seven sub-watersheds (SW1, SW5, WS6, SW8, SW9, SW10 and SW12) constituted 63.00 % of watershed ranked as high to very high susceptibility to flash flood, while two sub-watersheds (SW 2 and WS 7) 12.20 % of the watershed classified under moderate flood susceptibility zone for which specific sub-watersheds flood risk reduction strategies are required to mitigate the hazard of flash flood. Four sub-watersheds (SW3, SW4, SW11, and SW13) represented 24.80 % of the watershed ranked as low susceptibility to flash floods. The study recommends the construction of retention bunds and embankments in the inland valleys and wetlands as sustainable soil and water conservation measures to mitigate flash floods and promote sustainable inland valleys and wetlands rice production.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 58-73"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of heavy metal contamination of sediments in the Ouaka River watershed in the Central African Republic","authors":"André Jules Ouambeti-Wickon ,&nbsp;Gabriel Ngueutchoua ,&nbsp;Doria Grace Takenne ,&nbsp;Prince Emilien Danguene ,&nbsp;Armand Sylvain Ludovic Wouatong","doi":"10.1016/j.wsee.2025.03.002","DOIUrl":"10.1016/j.wsee.2025.03.002","url":null,"abstract":"<div><div>The study, based on heavy metals such as cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), nickel (Ni), lead (Pb), vanadium (V), zinc (Zn) and iron (Fe) in the sediments of the Ouaka river watershed, aimed to determine the concentration profiles of the various contaminated zones and to assess the sources of pollution of these sediments, which are of both human and natural origin. These profiles were established against a backdrop of heavy industrial activity (discharges from the Ngakobo sugar refinery and the Bambari cotton gear factory), agricultural activity (with the use of chemical fertilizers and pesticides) and mining activity (artisanal gold mining), all of which may be responsible for heavy metal contamination of the sediments in this watershed. A total of 34 sediment samples were collected and analyzed by inductively coupled plasma mass spectrometry. Results for heavy metal concentrations (mg/kg) ranged from 0.006 to 0.019 for Cd; 1.7 to 7.11 for Co; 11.5 to 30.8 for Cr; 2.3 to 7.4 for Cu; 2.7 to 13.4 Ni; 1.36 to 25.99 for Pb; 11 to 18 for V; 7.9 to 20 for Zn and 11356.2 to 17875.5 for Fe. These values are significantly lower in the sediments studied than the reference values used in the upper continental crust. To assess the degree of contamination in these sediments, the enrichment factor, contamination factor, geo-accumulation index and pollutant load index were calculated. The result is that, with the exception of Pb in sample B15, which is moderately enriched, the other heavy metals are only slightly enriched, and this is confirmed by the geo-accumulation index and pollutant load index, which show the absence of contamination and pollution in this catchment. The results of this work will enable the Central African Republic to control the intensive discharge of industrial and mining residues, and also to limit the use of chemical fertilizers in agriculture in favor of natural fertilizers.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 84-96"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eutrophication weakens interspecific relationships across trophic levels in an urban wetland","authors":"Yingshan Wei ,&nbsp;He-Bo Peng ,&nbsp;Linhui Qi ,&nbsp;Yanpeng Cai ,&nbsp;Qingyang Guo ,&nbsp;Zhenchang Zhu","doi":"10.1016/j.wsee.2025.03.004","DOIUrl":"10.1016/j.wsee.2025.03.004","url":null,"abstract":"<div><div>Eutrophication poses a major threat to the stability of global aquatic ecosystems, especially in urban wetlands highly influenced by human activities. It frequently alters species composition, which in turn affects the overall structure of ecosystems. However, how eutrophication impacts inter-species interactions across different trophic levels remains poorly understood. This study examines communities at varying nutrient status within the same urban wetland, including phytoplankton, zooplankton, and fish, while considering environmental factors such as dissolved oxygen, manganese (Mn), water depth, and the Trophic State Index (TSI). We assess how eutrophication influences species interactions across multiple trophic levels. Our results show that intra-trophic correlations were primarily driven by water depth, manganese, whereas inter-trophic correlations were predominantly governed by TSI. Specifically, inter-group correlations between different trophic levels decreased with raising TSI, while inter-species relationships within phytoplankton strengthened with increasing TSI. These findings provide crucial insights into the mechanisms underlying species coexistence in urban wetlands and highlight the need for targeted management strategies to maintain ecological stability in the face of eutrophication. Future research should explore temporal and spatial dynamics to better understand the complex responses of wetland ecosystems to nutrient fluctuations.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 97-103"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of wetland vegetation succession based on coupled Gaussian and population dynamics models: A case study of Poyang Lake wetlands","authors":"Long Sun ,&nbsp;Zhen Han ,&nbsp;Shiyan Wang ,&nbsp;Jie Wang ,&nbsp;Xiaobo Liu ,&nbsp;Jialin Wang","doi":"10.1016/j.wsee.2024.11.001","DOIUrl":"10.1016/j.wsee.2024.11.001","url":null,"abstract":"<div><div>Wetland vegetation is the most crucial primary producer in wetland ecosystems and serves as an indicator of ecosystem health. After 2003, significant changes occurred in the “river-lake relationship” between Poyang Lake and the Yangtze River, with intensified dry conditions in autumn and winter leading to a shortened inundation period for sandbanks and significant changes in the community structure and spatial distribution of wetland vegetation. By coupling a Gaussian model with a population dynamics model, this study simulated the response of wetland vegetation to inundation duration under different hydrological year types, revealing the relationship between vegetation distribution and inundation duration. Key parameters, such as growth and mortality rates, were identified, and the vegetation succession and spatial distribution of Poyang Lake wetlands were simulated for five representative years: a wet year (2010), a normal year (2001), a dry year (2006), an extreme wet year (1998), and an extreme dry year (2022). The results showed that the response of wetland vegetation to inundation duration followed a Gaussian curve, with each species exhibiting an optimal range of inundation durations. Mortality rates increased when the duration fell outside this range. In 2010, the total area of wetland vegetation was similar to that in a normal year, but the proportions of different plant species varied significantly. Compared to 2001, the areas of <em>Phalaris arundinacea</em> and <em>Polygonum criopolitanum</em> increased by 50.92 % and 24.86 %, respectively, while the areas of <em>Phragmites australis</em> and <em>Triarrhena lutarioriparia</em> decreased by 71.66 % and 83.49 %. In 1998, the total vegetation area shrank considerably, with a 54.74 % reduction compared to 2001 and a 64.32 % reduction compared to 2006. In contrast, the total wetland vegetation area reached its maximum in the extreme dry year of 2022, increasing by 41.35 % compared to 2001. Among dominant species, <em>Carex</em> spp., <em>Cynodon dactylon</em>, and <em>Phragmites australis</em> expanded significantly in dry years, while <em>Phalaris arundinacea</em> and <em>Polygonum criopolitanum</em> were better adapted to flood conditions.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"7 ","pages":"Pages 1-10"},"PeriodicalIF":0.0,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}