Watershed Ecology and the Environment最新文献

Soil microbial composition and vertical distribution patterns along the Liangshui River in Beijing, China 北京凉水河流域土壤微生物组成及垂直分布格局

Watershed Ecology and the Environment

Pub Date : 2025-12-19 DOI: 10.1016/j.wsee.2025.11.002

Yimeng Li, Ting Li, Guijun Liu, Lei Wang, Xin Tong, Manrong Huang

This study investigated the composition and vertical distribution of soil microbial communities in the vicinity of Liangshui River in Beijing. Soil samples (n = 18) were collected from depths of 0.1 m − 55 m, spanning three geological layers including artificial accumulation layer, recent sedimentary layer, and Quaternary sedimentary layer. These samples were analyzed using high-throughput sequencing to characterize bacterial and archaeal community composition. Results revealed that soil bacterial diversity and richness progressively decreased with increasing soil depth. Beta diversity analysis revealed that soil bacterial communities exhibited significant differences in composition across all three geological layers, whereas significant differences in soil archaeal communities were observed only between the artificial accumulation layer and the other two layers. At the taxonomic level, the dominant bacterial phyla in the soil were primarily Proteobacteria, Firmicutes, and Actinobacteria, with Bacillus being the predominant genus, while Crenarchaeota and Thermoplasmatota dominated the archaeal communities. PICRUSt2 functional prediction revealed that the soil bacterial communities were predominantly associated with carbohydrate metabolism, amino acid metabolism, and energy metabolism, among other functional pathways. Correlation network shows that Povalibacter, Pedomicrobium, and Bauldia may be keystone taxa in Beijing’s urban soils. This study not only elucidates the vertical distribution patterns of soil microbial communities along the Liangshui River, but also provides critical references for soil utilization and amendment strategies in Beijing.

对北京凉水河流域土壤微生物群落组成及垂直分布进行了研究。土壤样品（n = 18）采集深度为0.1 m ~ 55 m，跨越人工堆积层、近代沉积层和第四纪沉积层3个地质层。利用高通量测序对这些样品进行分析，以表征细菌和古细菌的群落组成。结果表明，随着土壤深度的增加，土壤细菌多样性和丰富度逐渐降低。β多样性分析表明，3个地质层土壤细菌群落组成存在显著差异，而土壤古细菌群落仅在人工堆积层与其他2个地质层之间存在显著差异。在分类学水平上，土壤中优势菌门主要为变形菌门、厚壁菌门和放线菌门，其中芽孢杆菌属为优势属，绿原菌门和热原菌门为优势古菌群。PICRUSt2功能预测表明，土壤细菌群落主要与碳水化合物代谢、氨基酸代谢和能量代谢等功能途径相关。相关性网络表明，Povalibacter、Pedomicrobium和Bauldia可能是北京城市土壤的关键分类群。该研究不仅阐明了凉水河流域土壤微生物群落的垂直分布格局，而且为北京市土壤资源利用和改良策略提供了重要参考。

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引用次数: 0

Sub-diurnal (daytime) and vertical profile variations of the physicochemical characteristics of Lake Rukwa: Implications for ecological state 鲁克瓦湖理化特征的亚日（白天）和垂直剖面变化：对生态状态的影响

Watershed Ecology and the Environment

Pub Date : 2025-12-14 DOI: 10.1016/j.wsee.2025.12.001

Azaria Stephano Lameck , Brian Rotich , Phenson Nsima Justine , Melkizedeck Tsere

This study investigates the daytime and vertical variations in the physicochemical properties of Lake Rukwa and their implications for the lake’s ecological status. In this study, field measurements included pH, temperature, dissolved oxygen (DO), oxygen saturation (O2 (%)), electrical conductivity (EC), salinity, total dissolved solids (TDS), and turbidity. Additionally, TP and Chlorophyll-a (Chl-a) concentrations were analyzed. The trophic status of the lake was evaluated using the Carlson Trophic State Index (CTSI). The study revealed that the lake had low water clarity (0.42 ft), indicating high suspended particle loads that limit light penetration, reduce photosynthesis, and lower DO concentrations. Chl-a significantly declined sharply with depth (P < 0.05), reflecting higher surface photosynthetic activity. Both pH and DO exhibit notable variations with depth and time of day (P < 0.05), while O2 (%) also showed a strong vertical variation. CTSI values ranged from 82.49 to 89.9, classifying the lake as hypereutrophic and highlighting severe ecological stress. These conditions are likely driven by nutrient enrichment from agricultural runoff and land-use change within the lake basin. To mitigate further degradation, management interventions, continuous monitoring, and stricter regulation of anthropogenic inputs are urgently required.

本研究探讨了鲁克瓦湖理化性质的日间和垂直变化及其对湖泊生态状况的影响。在本研究中，现场测量包括pH、温度、溶解氧（DO）、氧饱和度（O2(%)）、电导率（EC）、盐度、总溶解固体（TDS）和浊度。此外，还分析了TP和叶绿素a （Chl-a）浓度。采用卡尔森营养状态指数（Carlson trophic State Index， CTSI）对湖泊的营养状况进行了评价。研究表明，该湖的水清澈度较低（0.42英尺），表明高悬浮颗粒负荷限制了光的穿透，减少了光合作用，降低了DO浓度。Chl-a随深度急剧下降（P < 0.05），反映出较高的表面光合活性。pH和DO随深度和时间的变化显著（P < 0.05）， O2（%）也表现出较强的垂直变化。CTSI值在82.49 ~ 89.9之间，属于富营养化湖泊，生态压力严重。这些情况可能是由湖盆内农业径流和土地利用变化带来的养分富集所驱动的。为了减轻进一步退化，迫切需要管理干预、持续监测和更严格地管制人为投入。

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引用次数: 0

Recent trends and future directions in artificial intelligence (AI) applications for coastal ecosystems Conservation: Insights from a bibliometric analysis 人工智能应用于沿海生态系统保护的最新趋势和未来方向：来自文献计量学分析的见解

Watershed Ecology and the Environment

Pub Date : 2025-12-05 DOI: 10.1016/j.wsee.2025.11.004

Sylvester T. Cortes

Coastal ecosystems, such as mangroves, seagrass beds, and coral reefs, provide essential ecological, economic, and social services. However, their capacity to deliver these services is diminishing due to increasing ecosystem disturbances, resource exploitation, and the impacts of climate change. In response, the integration of artificial intelligence (AI) tools into conservation efforts has led to a surge in scholarly publications, highlighting the need for a bibliometric analysis to systematically examine emerging trends and identify future directions in this rapidly evolving and interdisciplinary field. Bibliometric data were sourced from the Scopus database, covering a ten-year period from 2015 to June 2025. The analysis was conducted using Bibliometrix and VOSviewer, complemented by OpenRefine, Microsoft Excel, RStudio, and OriginPro for data cleaning and visualization. Results revealed an annual publication growth rate of 6.61% in the field. The institutions from China and the United States are at the forefront of research outputs and international collaborations, indicating their strong investment and leadership in the application of AI to coastal ecosystem conservation. Keyword co-occurrence analysis identified thematic clusters around AI tools such as remote sensing, machine learning, and deep learning, highlighting a transition from traditional environmental sensing toward real-time monitoring and predictive modeling. There is also a growing presence of multiple countries based on the keyword co-occurrence networks. It indicates increasing global participation, collaboration, and interest in applying AI to ecosystem conservation. Collectively, these findings point to a maturing research landscape with a promising trajectory toward the development of globally adaptive conservation strategies driven by artificial intelligence.

沿海生态系统，如红树林、海草床和珊瑚礁，提供必要的生态、经济和社会服务。然而，由于生态系统干扰、资源开发和气候变化的影响日益严重，它们提供这些服务的能力正在减弱。作为回应，人工智能（AI）工具与保护工作的整合导致了学术出版物的激增，突出了对文献计量分析的需求，以系统地检查新兴趋势，并确定这个快速发展的跨学科领域的未来方向。文献计量数据来源于Scopus数据库，时间跨度为2015年至2025年6月。使用Bibliometrix和VOSviewer进行分析，并辅以OpenRefine、Microsoft Excel、RStudio和OriginPro进行数据清理和可视化。结果显示，该领域的年发表增长率为6.61%。中美两国机构在研究成果和国际合作方面走在前列，表明两国在人工智能应用于沿海生态系统保护方面的强大投入和领导作用。关键词共现分析确定了围绕人工智能工具（如遥感、机器学习和深度学习）的主题集群，突出了从传统环境感知向实时监测和预测建模的转变。基于关键词共现网络的多个国家也越来越多。这表明全球在将人工智能应用于生态系统保护方面的参与、合作和兴趣日益增加。总的来说，这些发现表明了一个成熟的研究领域，在人工智能驱动下，全球适应性保护策略的发展前景广阔。

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引用次数: 0

A bibliometric and systematic assessment of land use/cover change research on freshwater catchments: Trends from the past decade (2014–2024) 淡水流域土地利用/覆被变化研究的文献计量与系统评价：近十年趋势（2014-2024）

Watershed Ecology and the Environment

Pub Date : 2025-12-02 DOI: 10.1016/j.wsee.2025.11.003

Célestin Havyarimana , Suranto Suranto , Tatien Masharabu , Agung Hidayat

Freshwater catchments are integral to the Earth’s hydrological and ecological networks, supporting biodiversity and delivering critical ecosystem goods and services. However, these systems face escalating anthropogenic pressures, particularly from land use and cover changes, which threaten their structural integrity and functional capacity. Despite increasing scientific interest, a global body of research that captures long-term trends specific to freshwater systems remains limited. To address this, a bibliometric-systematic literature review was conducted with 688 peer-reviewed articles from Scopus and Web of Science, published between 2014 and 2024. The study revealed an average annual growth rate of 9.72 % in publications, with China contributing 42.3 % and the United States contributing 10.8 % to the total research output. Three dominant research themes were identified: land use–water quality interactions, climate change–hydrological responses, and urbanization–ecosystem service trade-offs. A methodological evolution was also noted, shifting from descriptive studies towards advanced predictive modeling. International collaborations accounted for 16.13 %, yet significant geographical disparities persist, with the Global South remaining underrepresented. This study highlights the need to expand research in underrepresented regions, promote standardized assessment protocols for better comparability, and advance interdisciplinary approaches that integrate ecological and social dimensions. Incorporating emerging techniques, such as machine learning, is also recommended to enhance methodological innovation. These findings offer a strong evidence base to support future research and policies for sustainable freshwater catchment management amidst the growing environmental challenges.

淡水集水区是地球水文和生态网络的组成部分，支持生物多样性并提供关键的生态系统产品和服务。然而，这些系统面临着不断升级的人为压力，特别是来自土地利用和覆盖变化的压力，这威胁到它们的结构完整性和功能能力。尽管科学兴趣日益浓厚，但能够捕捉淡水系统特定长期趋势的全球研究机构仍然有限。为了解决这个问题，我们对2014年至2024年间发表的来自Scopus和Web of Science的688篇同行评议文章进行了文献计量学系统文献综述。该研究显示，出版物的平均年增长率为9.72%，其中中国贡献42.3%，美国贡献10.8%。确定了三个主要研究主题：土地利用-水质相互作用、气候变化-水文响应和城市化-生态系统服务权衡。还注意到方法论的演变，从描述性研究转向先进的预测建模。国际合作占16.13%，但显著的地理差异仍然存在，全球南方的代表性仍然不足。本研究强调有必要扩大代表性不足地区的研究，促进标准化评估协议以提高可比性，并推进整合生态和社会维度的跨学科方法。还建议结合新兴技术，如机器学习，以加强方法创新。这些发现为在日益严峻的环境挑战中支持未来可持续淡水集水区管理的研究和政策提供了强有力的证据基础。

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引用次数: 0

Exploration for the model of three-dimensional layered confirmation of sea area rights based on the concept of intensive sea use 基于集约利用理念的海域权立体分层确权模式探索

Watershed Ecology and the Environment

Pub Date : 2025-11-22 DOI: 10.1016/j.wsee.2025.10.005

Yang Zheng , Pei Liu , Gang Wang , Chengfen Xu , Dan Kong , Xiujuan Mu

With the increasing demand for the development and utilization of Marine space, the usage of sea area in three-dimensional style has become a powerful means to alleviate the contradiction of sea use and enhance the value of sea area resources. According to the structure characteristics of the sea space, the sea space is divided into four layers: above sea level space (D1), seawater space (D2), Quaternary sedimentary layer space (D3) and bedrock layer space (D4). Based on the summary of the types of available resources for each layer, the paper discusses the confirmable right to use the sea and the compatibility for different layers. From the Angle of intensive, efficient and green sea use, four typical three-dimensional development modes of sea area are put forward. In view of the contradiction between the existing management system and the usage of sea area in three-dimensional style, the optimization suggestions for usage of sea area in three-dimensional style are put forward from the aspects of compatibility assessment system, coordination and compatibility of layered right in sea area, and three-dimensional property right system.

随着人们对海洋空间开发利用需求的不断增加，海域立体利用已成为缓解海域利用矛盾、提升海域资源价值的有力手段。根据海空间的构造特征，将海空间划分为4层：海平面以上空间（D1）、海水空间（D2）、第四纪沉积层空间（D3）和基岩层空间（D4）。在总结各层可利用资源类型的基础上，探讨了可确认的海洋使用权和不同层间的兼容性。从集约利用、高效利用和绿色利用的角度，提出了四种典型的海域立体开发模式。针对现有管理体制与海域立体使用之间存在的矛盾，从兼容性评价制度、海域分层权利协调兼容、立体产权制度等方面提出了对海域立体使用的优化建议。

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引用次数: 0

Biodegradation of ciprofloxacin by Exiguobacterium sp. from tropical river sediments: an integrated approach 热带河流沉积物中环丙沙星的生物降解：一种综合方法

Watershed Ecology and the Environment

Pub Date : 2025-11-18 DOI: 10.1016/j.wsee.2025.11.001

Irina Salgado-Bernal , Gabriela Cejas-Añón , Alen Nils Baeza-Fonte , Armando Martínez-Sardiña , María E. Carballo-Valdés , Periyasamy Sivalingam , John Poté

Ciprofloxacin (CIP) is a widely used broad-spectrum antibiotic. Its persistence and hydrophobic nature pose environmental risks to aquatic ecosystems. There is a lack of studies on the isolation and characterization of antibiotic-degrading microorganisms, especially in tropical ecosystems; although bacterial resistance to antibiotics in aquatic systems have been extensively studied. This study introduces a comprehensive methodological approach to evaluate the biodegradation potential of autochthonous bacteria, specifically Exiguobacterium sp. (T-316), isolated from the sediments of the Almendares River in Havana. The methodology integrates three key stages: (1) assessment of antibiotic resistance profiles, including the determination of minimum inhibitory concentration (MIC) for CIP, (2) evaluation of biodegradation capacity, and (3) measurement of residual antibiotic activity in post-treated water. Exiguobacterium sp. strain displayed a ciprofloxacin MIC of 7 µg mL⁻¹, indicating resistance. Biodegradation assays demonstrated this strain degraded 74.36 % of CIP in model water systems through co-metabolism (biodegradation of CIP using a co-substrate for metabolic support), with significant differences in the presence of a co-substrate. The final CIP concentration in effluents was significantly lower than the initial concentration. Notably, transformation products were detected after 72 h, regardless of glucose supplementation. The residual antibiotic activity in water treated under co-metabolic conditions showed a complete (100 %) reduction. This framework provides a robust and reproducible strategy for identifying and characterizing environmental bacterial strains with antibiotic degradation potential, especially relevant to underrepresented tropical ecosystems, despite their high microbial diversity. This study supports the development of sustainable processes for treating antibiotic-contaminated water, and is the first comprehensive report on CIP biodegradation in Cuba.

环丙沙星（CIP）是一种应用广泛的广谱抗生素。它的持久性和疏水性对水生生态系统构成了环境风险。缺乏对抗生素降解微生物的分离和特性的研究，特别是在热带生态系统中；尽管水生系统中细菌对抗生素的耐药性已被广泛研究。本研究介绍了一种综合的方法来评估从哈瓦那Almendares河沉积物中分离的原生细菌，特别是Exiguobacterium sp. （T-316）的生物降解潜力。该方法整合了三个关键阶段：(1)抗生素耐药性评估，包括确定CIP的最低抑制浓度（MIC）；(2)生物降解能力评估；(3)测量处理后水中残留的抗生素活性。Exiguobacterium sp.菌株环丙沙星MIC为7µg mL−1，表明耐药。生物降解实验表明，该菌株通过共代谢（利用共底物作为代谢支持的CIP生物降解）在模型水系统中降解了74.36%的CIP，其中共底物的存在存在显著差异。最终出水中CIP浓度显著低于初始浓度。值得注意的是，无论是否补充葡萄糖，72 h后都能检测到转化产物。在共代谢条件下处理的水中残留抗生素活性显示完全（100%）降低。该框架为识别和表征具有抗生素降解潜力的环境细菌菌株提供了一个强大且可重复的策略，特别是与代表性不足的热带生态系统相关，尽管它们的微生物多样性很高。这项研究支持可持续发展的过程，以处理抗生素污染的水，是第一个全面的报告，在古巴的CIP生物降解。

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引用次数: 0

Assessing sediment-induced storage capacity loss in the Hisorak Reservoir, Uzbekistan 评估乌兹别克斯坦Hisorak水库泥沙引起的蓄水能力损失

Watershed Ecology and the Environment

Pub Date : 2025-11-03 DOI: 10.1016/j.wsee.2025.10.004

Khojiakbar Khasanov, Masharif Bakiev

This study examines the long-term sedimentation dynamics and their impact on the storage capacity of the Hisorak Reservoir over 42 years (1980–2022). Sedimentation rates, capacity loss, and spatial volume changes were analyzed by comparing the original design data with bathymetric surveys conducted in 2003 and 2022. Four interpolation techniques—Inverse Distance Weighting (IDW), Radial Basis Function (RBF), Ordinary Kriging (OK), and Empirical Bayesian Kriging (EBK)—were applied to process bathymetric data and evaluated using RMSE, MAE, R², and SDpred. Among them, OK provided the highest accuracy (RMSE = 1.13, MAE = 0.008, R² = 0.996). The resulting spatial model enabled precise capacity calculations, showing a reduction of 39.4 Mm³ (23.2 %) in reservoir storage due to sedimentation. Between 2003 and 2022, sediment accumulated at an average rate of 0.88 Mm³ yr⁻¹, more than three times the design estimate of 0.272 Mm³ yr⁻¹. A Surface Difference Map revealed concentrated deposition in upstream zones and erosion along reservoir boundaries. These findings demonstrate that sedimentation is progressing faster than anticipated, causing accelerated storage loss. The study highlights the usefulness of geostatistical methods and surface difference analysis for assessing reservoir sedimentation and supports the development of more effective management and sediment-control strategies in arid-region reservoirs such as Hisorak.

本研究考察了长崎水库42年（1980-2022年）的长期沉积动态及其对库容的影响。通过将原始设计数据与2003年和2022年进行的水深测量数据进行比较，分析了沉积速率、容量损失和空间体积变化。四种插值技术——逆距离加权（IDW）、径向基函数（RBF）、普通克里格（OK）和经验贝叶斯克里格（EBK）——被应用于处理水深数据，并使用RMSE、MAE、R2和SDpred进行评估。其中，OK的准确度最高（RMSE = 1.13, MAE = 0.008, R2 = 0.996）。由此产生的空间模型可以进行精确的容量计算，显示由于沉积作用，水库储存量减少了39.4 Mm3（23.2%）。在2003年至2022年期间，沉积物的平均积累速率为0.88 Mm3 yr - 1，是设计估算值0.272 Mm3 yr - 1的三倍多。地表差值图显示，上游地区沉积集中，沿水库边界有侵蚀。这些发现表明，沉积的进展速度比预期的要快，导致了储存的加速损失。这项研究强调了地质统计方法和地表差异分析对评价水库沉积的有用性，并支持在诸如历史ak这样的干旱地区水库制定更有效的管理和控制沉积战略。

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引用次数: 0

Quantitative evaluation of environmental and human health impacts in an Indonesian conservation region: A life cycle assessment (LCA) approach 印度尼西亚保护区环境和人类健康影响的定量评价：生命周期评估方法

Watershed Ecology and the Environment

Pub Date : 2025-11-02 DOI: 10.1016/j.wsee.2025.10.006

Novy Ariyanto , Anisah Anisah , Virny Zasyana Eka Putri , Yoyon Wahyono , Hashfi Hawali Abdul Matin , Isnaeni Kumalasari , Mutia Citrawati Lestari , Muhammad Raihan Farras Hakim , Anissa Dewi Suryaningtyas , Sundari Sundari , Nugroho Adi Sasongko , Martin Anda , Anggara Lomak Prihatin , Lambas Parlaungan Panggabean

Karimunjawa National Park (KNP) is an emerging tourism destination in Indonesia, where increasing tourism has led to excessive groundwater use and land subsidence. These issues pose environmental and health risks from emissions and seawater intrusion. This study examines the potential effects of these factors on the environment and human health within KNP. The research utilizes OpenLCA software 2.0.1 and the Ecoinvent 3.8 database, applying the CML-IA Baseline method for environmental impact assessment and the EPS 2015d method for human health impacts. The results show that the largest environmental impact is eutrophication, with the highest values recorded at spot 11 (6.94E-06 kg PO₄– eq). At spot 5, where copper (Cu) contamination reached the highest levels, the Authors observed the most significant ecotoxicity impacts, affecting freshwater (3.67E-06 kg 1,4-DB eq) ecosystems. Human health impacts, including intellectual disability (2.62E-10 Person-Years), and renal dysfunction (1.028E-13 case), were most significant at spot 5, linked to lead (Pb) contamination. The study suggests that reducing human activity in areas contributing to eutrophication and ecotoxicity, such as controlling nitrate and copper pollution, could mitigate environmental damage. Moreover, addressing human toxicity and health risks from lead requires improving waste management, ecosystem rehabilitation, pesticide reduction, and strengthening environmental monitoring. Public awareness of these risks is essential for effective mitigation.

Karimunjawa国家公园（KNP）是印度尼西亚一个新兴的旅游目的地，在那里，日益增长的旅游业导致了地下水的过度使用和地面沉降。这些问题造成了排放和海水入侵带来的环境和健康风险。本研究探讨了这些因素在国家公园内对环境和人类健康的潜在影响。本研究采用OpenLCA 2.0.1软件和Ecoinvent 3.8数据库，采用CML-IA Baseline方法进行环境影响评价，采用EPS 2015d方法进行人体健康影响评价。结果表明：水体富营养化对环境影响最大，11点水体富营养化程度最高（6.94E-06 kg PO4 - eq）；在5号地点，铜（Cu）污染达到最高水平，作者观察到最显著的生态毒性影响，影响淡水生态系统（3.67E-06 kg 1,4- db eq）。人类健康影响，包括智力残疾（2.62E-10人年）和肾功能障碍（1.028E-13例），在5号点最为显著，与铅（Pb）污染有关。该研究表明，在导致富营养化和生态毒性的地区减少人类活动，如控制硝酸盐和铜污染，可以减轻环境破坏。此外，解决铅对人体的毒性和健康风险需要改进废物管理、恢复生态系统、减少农药和加强环境监测。公众对这些风险的认识对于有效减轻风险至关重要。

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引用次数: 0

Plant species diversity and composition in Kanyabaha wetland in Rukiga District, Uganda 乌干达Rukiga地区Kanyabaha湿地植物物种多样性和组成

Watershed Ecology and the Environment

Pub Date : 2025-10-27 DOI: 10.1016/j.wsee.2025.10.003

Paul Walakira , Cecilia Gichuki , John Muriuki , Ezekiel Ndunda , Peter B. Olanya , Pantaleon M.B. Kasoma

Wetlands are ecologically and socioeconomically vital ecosystems, yet they remain highly vulnerable to human-induced disturbances. This study assessed plant species composition, diversity, and ecological dominance within Kanyabaha Wetland in Uganda to generate baseline ecological data that can inform sustainable management. Standard vegetation survey techniques and ecological indices, including Shannon-Wiener, Simpson’s Diversity, and Importance Value Index (IVI), were employed across sites with varying disturbance levels. A total of 31 plant species belonging to 19 families were recorded, with notable variation in species richness and composition across sites. Less disturbed areas (e.g., Rutenje and Burime) exhibited higher native species richness and stronger ecological integrity, while highly disturbed sites like Kandago were dominated by introduced species, particularly Eucalyptus spp. Interestingly, Kandago recorded the highest diversity indices, suggesting that while disturbance may increase species evenness, it compromises ecological balance. The dominance of few species in disturbed areas indicated a shift in vegetation structure, potentially disrupting ecosystem functionality. To address these issues, the study recommends targeted conservation measures, such as the removal or control of invasive species, promotion of native species regeneration, and community-led restoration initiatives. These findings are crucial for wetland managers, conservation agencies, and policy-makers, offering a scientific basis for prioritizing conservation areas and designing context-specific management interventions. The study contributes to the broader understanding of plant community responses to disturbance, supporting ongoing ecological monitoring and evidence-based restoration planning.

湿地是生态和社会经济上至关重要的生态系统，但它们仍然极易受到人为干扰。本研究评估了乌干达Kanyabaha湿地的植物物种组成、多样性和生态优势，以生成基线生态数据，为可持续管理提供信息。采用Shannon-Wiener、Simpson’s Diversity和重要性值指数（IVI）等标准植被调查技术和生态指数对不同干扰程度的样地进行调查。共记录到植物种类31种，隶属于19科，各样点物种丰富度和组成差异显著。受干扰程度较低的地区（如Rutenje和Burime）表现出较高的本地物种丰富度和较强的生态完整性，而受干扰程度较高的地区（如Kandago）则以引进物种为主，尤其是桉树。有趣的是，Kandago的多样性指数最高，表明干扰在增加物种均匀性的同时也损害了生态平衡。受干扰地区少数物种的优势表明植被结构的转变，可能会破坏生态系统的功能。为了解决这些问题，该研究建议采取有针对性的保护措施，例如清除或控制入侵物种，促进本地物种的再生，以及社区主导的恢复计划。这些发现对湿地管理者、保护机构和政策制定者至关重要，为确定保护区的优先次序和设计具体的管理干预措施提供了科学依据。该研究有助于更广泛地了解植物群落对干扰的响应，为持续的生态监测和基于证据的恢复规划提供支持。

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引用次数: 0

Assessing land-use and land cover change in peri-urban wetland in Tembisa, South Africa 南非Tembisa城市边缘湿地土地利用和土地覆盖变化评估

Watershed Ecology and the Environment

Pub Date : 2025-10-17 DOI: 10.1016/j.wsee.2025.10.001

Janet Maluleke, Ndidzulafhi Innocent Sinthumule

Wetlands provide diverse ecosystem services but are increasingly degraded due to anthropogenic activities. Poor management has made wetlands to undergone significant change because of various anthropogenic activities. This study aimed at investigating the impacts of land use land cover changes (LULCC) over 32 years (1990–2022) in the condition and status of a peri-urban wetland in Tembisa, Gauteng province in South Africa. To achieve the aim of the study, various Landsat TM 4–5, SPOT 5 and 6, and Sentinel 2A were processed in ArcGIS Pro to assess, map and monitor the extent of LULCC in Kaalspruit wetland. A multi-source satellite image analysis was performed using a Maximum Likelihood classification algorithm in supervised classification to provide a quantitative assessment and a detailed overview of the rate of change. The result showed that built-up areas and bare land increased by 255.37 ha and 22.32 ha, respectively, while cultivated land, vegetation, and water bodies decreased by 111.33 ha, 144.42 ha, and 20.78 ha, respectively. Such changes show significant human interventions such as expansion of infrastructural development, pollution and cultivation because of increased population pressure. Interventions should be made for the rehabilitation and sustainable management of wetlands in the peri-urban areas of Tembisa.

湿地提供多种生态系统服务，但由于人为活动，湿地的退化日益严重。管理不善使湿地因各种人为活动而发生重大变化。以南非豪登省Tembisa为研究对象，研究了1990-2022年32年土地利用/土地覆盖变化（LULCC）对城市边缘湿地的影响。为实现研究目的，利用ArcGIS Pro软件对Landsat TM 4-5、spot5和spot6以及Sentinel 2A进行处理，对Kaalspruit湿地的LULCC程度进行评估、制图和监测。使用监督分类中的最大似然分类算法对多源卫星图像进行分析，以提供定量评估和变化率的详细概述。结果表明：建成区和裸地面积分别增加了255.37 ha和22.32 ha，耕地、植被和水体面积分别减少了111.33 ha、144.42 ha和20.78 ha。这些变化显示出重大的人为干预，如基础设施发展的扩大、人口压力增加造成的污染和耕种。应采取干预措施，恢复和可持续地管理坦比萨城郊地区的湿地。

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