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Differential grassland use by livestock in Inner mongolian pastures: cattle seek biomass, sheep favor nutritional quality 内蒙古牧区牲畜对草地的差异利用:牛追求生物量,羊追求营养性
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114567
Yiqiong Guo , Tianyang Fu , Zhenhao Zhang , Yi Hu , Ruiyu Ai , Yunxiang Cheng
Grazing is a major land use in natural grasslands; however, spatial use differences among livestock types and the underlying mechanisms in mixed grazing systems remain unclear. In this study, we used global positioning system-accelerometer collars, unmanned aerial vehicle-based multispectral remote sensing, and ground vegetation quadrats to quantify the spatial foraging patterns of cattle and sheep and identify their driving factors in a typical family ranch in Xilingol, Inner Mongolia. We found that the foraging behavior of cattle was significantly influenced by the aboveground biomass. They clearly tended to choose areas with high normalized vegetation index (NDVI) values, which are characterized by high vegetation coverage and productivity. In contrast, sheep exhibited a more uniform foraging distribution, favoring plant species with higher nutrient contents, particularly total nitrogen. Structural equation modeling revealed that grassland resources influenced livestock foraging not only directly as suggested by indicators such as the NDVI, but also indirectly by regulating plant nitrogen and phosphorus concentrations. Overall, cattle had a quantity-oriented foraging strategy, whereas sheep showed a quality-oriented preference. Our findings suggest that the NDVI and plant total nitrogen can serve as complementary indicators for grassland monitoring and degradation assessment in mixed grazing systems, providing a scientific basis for spatially explicit livestock allocation, overgrazing mitigation, and grassland restoration management.
放牧是天然草原的主要土地利用方式;然而,混合放牧系统中不同家畜类型间的空间利用差异及其潜在机制尚不清楚。本研究以内蒙古锡林郭勒典型家庭牧场为研究对象,利用全球定位系统加速度计项圈、无人机多光谱遥感和地面植被样方等技术,对牛羊的空间觅食模式进行量化,并分析其驱动因素。研究发现,地上生物量对牛的觅食行为有显著影响。他们明显倾向于选择归一化植被指数(NDVI)值高的地区,这些地区具有植被覆盖度和生产力高的特点。相比之下,绵羊的觅食分布更为均匀,偏爱养分含量较高的植物,尤其是全氮含量较高的植物。结构方程模型表明,草地资源不仅通过NDVI等指标直接影响畜禽采食,还通过调节植物氮、磷浓度间接影响畜禽采食。总体而言,牛具有以数量为导向的觅食策略,而羊则表现出以质量为导向的偏好。研究结果表明,NDVI和植物全氮可以作为混合放牧系统草地监测和退化评价的互补指标,为空间明确的牲畜配置、过度放牧缓解和草地恢复管理提供科学依据。
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引用次数: 0
Environmental thresholds in canopy cover shape spider assemblages in Cerrado riparian zones 塞拉多河滨带冠层形态蜘蛛群落的环境阈值
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114553
Guilherme Santana Lustosa , Adalberto José Santos , Antonio Domingos Brescovit , Bárbara Teixeira Faleiro , Gustavo Rodrigo Sanchez Ruiz , Pedro Henrique Martins , Leonardo Sousa Carvalho
Riparian zones in the Brazilian Cerrado are increasingly threatened by agricultural expansion, deforestation, and land-use change, with significant implications for biodiversity conservation. Spiders are ecologically important predators and bioindicators, yet little is known about how they respond to changes in vegetation structure in riparian habitats. This study aims to assess the influence of canopy cover and understory complexity on the diversity, abundance, and composition of understory spider assemblages in riparian zones. We sampled 3260 adult spiders across 30 first- to fourth-order streams in the Cerrado, using standardized beating tray methods, and measured habitat structure variables. Our results showed that canopy cover had a positive effect on spider abundance and species richness, while understory complexity was significantly related only to species richness. Vegetation structure had a limited effect on species composition. Using threshold indicator taxa analysis (TITAN), we identified ecological thresholds for canopy cover between 58 % and 77 %, and 16 spider taxa were classified as indicators of change along this gradient. The study demonstrates that canopy cover is a significant driver of spider diversity and that threshold-based metrics can help identify sensitive points of ecosystem change.
Implications for insect conservation: Riparian zones in the Cerrado biome should be prioritized for conservation and restoration, especially where canopy cover has been markedly diminished. Preserving canopy cover above 60 % is likely essential to maintain both the structural integrity and functional dynamics of understory spider assemblages. As reliable bioindicators at species and community levels, spiders can effectively reflect riparian habitat quality. Therefore, conservation strategies ought to encompass restricting deforestation along riparian margins, enforcing buffer-zone regulations and reestablishing native vegetation to enhance habitat complexity. These measures are crucial not only for protecting spider diversity but also for sustaining the ecosystem services they provide, such as natural pest control and trophic regulation at the aquatic–terrestrial interface.
巴西塞拉多的河岸区正日益受到农业扩张、森林砍伐和土地利用变化的威胁,这对生物多样性保护具有重要意义。蜘蛛是生态学上重要的捕食者和生物指示物,但人们对它们如何响应河岸栖息地植被结构的变化知之甚少。本研究旨在评估林冠覆盖度和林下植被复杂性对河岸带林下蜘蛛群落多样性、丰度和组成的影响。我们在塞拉多的30个一到四阶溪流中取样了3260只成年蜘蛛,使用标准化的打盘方法,并测量了栖息地结构变量。结果表明,林冠覆盖度对蜘蛛的丰度和物种丰富度有正向影响,林下复杂性仅与物种丰富度显著相关。植被结构对物种组成的影响有限。利用阈值指标分类群分析(TITAN),确定了林冠覆盖的生态阈值在58% ~ 77%之间,并将16个蜘蛛分类群划分为该梯度变化的指标。研究表明,冠层覆盖度是蜘蛛多样性的重要驱动因素,基于阈值的指标可以帮助识别生态系统变化的敏感点。对昆虫保护的启示:塞拉多生物群系的河岸区应优先保护和恢复,特别是在冠层覆盖明显减少的地方。保持60%以上的冠层覆盖度可能是维持林下蜘蛛群落结构完整性和功能动态的必要条件。蜘蛛是物种和群落水平上可靠的生物指标,能有效反映河岸生境质量。因此,保护策略应该包括限制沿河岸边缘的森林砍伐,执行缓冲区法规和重建原生植被以提高栖息地的复杂性。这些措施不仅对保护蜘蛛多样性至关重要,而且对维持它们提供的生态系统服务至关重要,例如自然害虫控制和水陆界面的营养调节。
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引用次数: 0
A many-objective simulation-optimization framework for integrated water resources management in canal-well combined irrigation area based on FloPy and NSGA-III 基于FloPy和NSGA-III的渠井结合灌区水资源综合管理多目标模拟优化框架
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114581
Yao Zhang , Yanan Jiang , Qihao Ma , Ya Yan , Jianzhe Hou , Xun Zhang , Jianqiang He , Xiaojun Wang , Qiang Li , Shikun Sun
The demand for agricultural products has been increasing in many developing countries all over the world due to improved living standards. It has generated significant rise in agricultural water consumption and ever-expanding irrigation area which are very sensitive to both climate change and farmers' irrigation and adaption strategies. In canal and well combined irrigation areas, because of ever increasing need for higher yield and intense variations in surface water supply and extreme weather conditions due to climate change, both groundwater over-exploitation in dry seasons and farmland inundation in wet seasons could happen. The ratios of canal irrigation (CI) to well irrigation (WI) in different regions with various cropping structures have to be carefully determined to avoid negative environmental impacts. To address these challenging and complex issues, this work developed a tightly coupled simulation-optimization framework based on FloPy and the many-objective genetic algorithm (NSGA-III) within the Pymoo framework. This approach enabled the evaluation of five key indicators: water productivity, total income, total water loss, equity (quantified by the Gini coefficient) and groundwater level fluctuation. The framework could provide actionable insights to support decision-making in ecological, environmental and economic contexts. The model was then tested and validated in Jinghuiqu irrigation area in Shaanxi Province (China) to obtain the Pareto Front for wet, normal and dry years. The key findings are as follows. (1) A reasonable canal-well combined irrigation water volume and proportion could be determined by the proposed simulation-optimization framework; (2) the average groundwater level fluctuations of recommend schemes are +0.82 m, +0.063 m, -0.26 m in wet, normal and dry years, respectively; (3) the ratios of canal-well of recommend schemes are 1:2.25, 1:1.19, and 1:1.74 in wet, normal and dry years; (4) different ratios of canal irrigation to well irrigation is crucial for sustainable groundwater development and managed aquifer recharge; (5) the results reveal distinct spatial-temporal variations across different administrative districts, thereby highlighting the considerable potential of the tightly coupled simulation-optimization model for integrated management of surface water and groundwater in climate sensitive canal-well combined irrigation area when dealing with many objectives.
由于生活水平的提高,世界上许多发展中国家对农产品的需求一直在增加。农业用水量显著增加,灌溉面积不断扩大,这对气候变化和农民的灌溉适应策略都非常敏感。在运河灌区和良好组合灌区,由于对更高产量的需求不断增加、地表水供应的剧烈变化以及气候变化导致的极端天气条件,旱季地下水过度开采和雨季农田淹没都可能发生。在不同种植结构的地区,应谨慎确定渠灌与井灌的比例,以避免对环境造成负面影响。为了解决这些具有挑战性和复杂性的问题,本工作开发了一个基于FloPy和Pymoo框架内的多目标遗传算法(NSGA-III)的紧密耦合仿真优化框架。这种方法能够评价五个关键指标:水生产力、总收入、总失水、公平(用基尼系数量化)和地下水位波动。该框架可以为支持生态、环境和经济背景下的决策提供可行的见解。然后在陕西省靖惠渠灌区对模型进行了验证,得到了丰水年、正常年和干旱年的帕累托锋。主要发现如下。(1)通过提出的模拟优化框架,可以确定合理的渠井联合灌溉水量和比例;(2)湿润年、正常年和干旱年推荐方案的平均地下水位波动分别为+0.82 m、+0.063 m和-0.26 m;(3)湿、平、干年份推荐方案的渠井比分别为1:2.25、1:1.19和1:1.74;(4)渠灌与井灌的不同比例对地下水的可持续开发和含水层补给管理至关重要;(5)不同行政区域间存在明显的时空差异,表明气候敏感型渠井联合灌区地表水与地下水综合治理紧密耦合模拟优化模型在多目标条件下具有较大的应用潜力。
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引用次数: 0
Spatiotemporal assessment of rainwater harvesting efficiency for multi-story residential buildings across different climate zones in China 中国不同气候带多层住宅雨水收集效率的时空评价
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114531
Pingping Luo , Ziwen Wang , Manting Luo , Jiachao Chen , Yubin Zhang , Meimei Zhou , Jianxin Zhang , Binaya Kumar Mishra , Maochuan Hu , Ahmed Elbeltagi
Rapidly growing population and urbanization have led to serious urban water environment problems. Rainwater is increasingly recognized and utilized as a viable alternative water source in response to these issues. Rainfall pattern, tank size and water use scenarios significantly affect the efficiency of RainWater Harvesting (RWH) systems. To better compare and analyze the impacts of the above factors on the reliability and efficiency of RWH systems, this study conducted experiments in three Chinese cities within different climate zones across three representative years (wet year, average year and dry year). Robust analysis was performed based on careful data pre-processing, which excludes irrelevant rainfall data. A computational tool was developed to evaluate the performance and reliability of rainwater management for RWH systems. Performance analysis and optimization of the RWH system for multi-story residential buildings based on a water balance model were conducted in three Chinese cities. We combined the roof catchment area, water tank volume, and rainwater utilization scenarios to obtain the rainwater harvesting efficiency, overflow ratio, water saving efficiency, and reliability charts of RWH system. In cities with large rainfall (Wuhan), before the maximum rainwater collection size is reached, increasing the tank size can significantly enhance the efficiency of the RWH system. In cities with average or low rainfall (Xi'an and Xining), the maximum rainfall storage capacity of the tank is easily reached, so rainfall is the main factor affecting the efficiency of the RWH system. Meanwhile, the water use scenario is the main factor affecting the reliability of the RWH system in cities with average or low rainfall. Demand scenario critically determines reliability—irrigation (B) achieves high reliability (up to ∼78 %), whereas toilet flushing (A) or combined use (C) exhibit much lower reliability (as low as 2.74 %) due to demand exceeding supply. Results of the study provide decision support for urban water authorities to effectively mitigate urban water supply deficiencies and urban flooding risks.
快速增长的人口和城市化导致了严重的城市水环境问题。雨水作为一种可行的替代水源得到越来越多的认可和利用,以应对这些问题。降雨模式、水箱大小和用水情况对雨水收集(RWH)系统的效率有显著影响。为了更好地比较和分析上述因素对水暖系统可靠性和效率的影响,本研究在中国三个不同气候带的城市进行了三个代表性年份(丰水年、平均年和干旱年)的试验。基于仔细的数据预处理,排除了不相关的降雨数据,进行了稳健分析。开发了一个计算工具来评估RWH系统雨水管理的性能和可靠性。基于水平衡模型对中国三个城市的多层住宅水暖系统进行了性能分析和优化。结合屋顶集水区面积、水箱容积、雨水利用场景,得出水暖系统的雨水收集效率、溢流比、节水效率和可靠性图。在降雨量较大的城市(武汉),在达到最大雨水收集量之前,增加水箱尺寸可以显著提高RWH系统的效率。在降雨平均或偏少的城市(西安、西宁),容易达到水箱的最大蓄水量,因此降雨是影响水轮机系统效率的主要因素。同时,在平均或低降雨城市中,用水场景是影响水轮机系统可靠性的主要因素。需求情景关键地决定了可靠性——灌溉(B)实现了高可靠性(高达~ 78%),而厕所冲洗(A)或综合使用(C)由于供不应求,可靠性低得多(低至2.74%)。研究结果可为城市水务主管部门有效缓解城市供水不足和城市洪涝风险提供决策支持。
{"title":"Spatiotemporal assessment of rainwater harvesting efficiency for multi-story residential buildings across different climate zones in China","authors":"Pingping Luo ,&nbsp;Ziwen Wang ,&nbsp;Manting Luo ,&nbsp;Jiachao Chen ,&nbsp;Yubin Zhang ,&nbsp;Meimei Zhou ,&nbsp;Jianxin Zhang ,&nbsp;Binaya Kumar Mishra ,&nbsp;Maochuan Hu ,&nbsp;Ahmed Elbeltagi","doi":"10.1016/j.ecolind.2025.114531","DOIUrl":"10.1016/j.ecolind.2025.114531","url":null,"abstract":"<div><div>Rapidly growing population and urbanization have led to serious urban water environment problems. Rainwater is increasingly recognized and utilized as a viable alternative water source in response to these issues. Rainfall pattern, tank size and water use scenarios significantly affect the efficiency of RainWater Harvesting (RWH) systems. To better compare and analyze the impacts of the above factors on the reliability and efficiency of RWH systems, this study conducted experiments in three Chinese cities within different climate zones across three representative years (wet year, average year and dry year). Robust analysis was performed based on careful data pre-processing, which excludes irrelevant rainfall data. A computational tool was developed to evaluate the performance and reliability of rainwater management for RWH systems. Performance analysis and optimization of the RWH system for multi-story residential buildings based on a water balance model were conducted in three Chinese cities. We combined the roof catchment area, water tank volume, and rainwater utilization scenarios to obtain the rainwater harvesting efficiency, overflow ratio, water saving efficiency, and reliability charts of RWH system. In cities with large rainfall (Wuhan), before the maximum rainwater collection size is reached, increasing the tank size can significantly enhance the efficiency of the RWH system. In cities with average or low rainfall (Xi'an and Xining), the maximum rainfall storage capacity of the tank is easily reached, so rainfall is the main factor affecting the efficiency of the RWH system. Meanwhile, the water use scenario is the main factor affecting the reliability of the RWH system in cities with average or low rainfall. Demand scenario critically determines reliability—irrigation (B) achieves high reliability (up to ∼78 %), whereas toilet flushing (A) or combined use (C) exhibit much lower reliability (as low as 2.74 %) due to demand exceeding supply. Results of the study provide decision support for urban water authorities to effectively mitigate urban water supply deficiencies and urban flooding risks.</div></div>","PeriodicalId":11459,"journal":{"name":"Ecological Indicators","volume":"182 ","pages":"Article 114531"},"PeriodicalIF":7.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Ecological farm typology and comparison in China: An unsupervised machine learning approach 中国生态农场类型与比较:一种无监督机器学习方法
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114560
Xiangbo Xu , Shuang Liu , Ziyi Zhou , Yue Xu , Yinghao Xue , Zhiyu Xu , Xiaofang Hu , Xiaohua Yu , Linxiu Zhang
Promoting ecological farms is a critical initiative for greening agriculture and advancing eco-agricultural theory into practice. Although China integrated ecological farm construction into national plans post-2020, its development remains nascent, necessitating objective and quantitative methods to classify farm models and evaluate their performance. This study addresses this gap by applying unsupervised machine learning—specifically Partitioning Around Medoids (PAM) clustering—to 2022 declaration data from 678 national ecological farms. Our analysis identified three distinct typologies: National Varieties Fine Management Type (NVFMT, 40.27 %), characterized by small-scale, specialty-crop operations with minimal synthetic inputs; Diversified Business Type (DBT, 33.78 %), integrating vegetable production, agritourism, and high adoption of eco-measures; and Large-scale Traditional Type (LTT, 25.96 %), focused on grain cultivation with extensive land use and flood irrigation. Performance evaluation using life cycle assessment, total factor productivity (TFP), and revenue analysis revealed no significant economic differences across types. However, NVFMT and DBT exhibited 48–52 % lower greenhouse gas (GHG) emission intensity than LTT, attributable to reduced fertilizer use and diversified practices. DBT also achieved significantly higher TFP (1.18) compared to NVFMT (0.68) and LTT (0.72), linked to operational diversity and technological integration. As the first national-scale application of machine learning to ecological farm typology in China, this research provides an evidence-based framework to guide targeted policies for sustainable agricultural transformation.
建设生态农场是绿色农业、推进生态农业理论实践的重要举措。虽然中国将生态农场建设纳入2020年后的国家规划,但其发展仍处于初级阶段,需要客观、定量的方法对农场模式进行分类和绩效评估。本研究通过将无监督机器学习(特别是围绕介质的分区(PAM)聚类)应用于来自678个国家生态农场的2022年申报数据,解决了这一差距。我们的分析确定了三种不同的类型:国家品种精细化经营型(NVFMT, 40.27%),其特点是以最小的合成投入进行小规模的专业作物经营;经营类型多元化(DBT, 33.78%),蔬菜生产、农业旅游一体化,生态措施采用率高;大规模传统类型(LTT)占25.96%,以粮食种植为主,土地利用粗放,以洪水灌溉为主。使用生命周期评估、全要素生产率(TFP)和收入分析的绩效评估显示,不同类型之间没有显著的经济差异。然而,由于减少了肥料使用量和多样化的做法,NVFMT和DBT的温室气体排放强度比LTT低48 - 52%。DBT的TFP(1.18)也显著高于NVFMT(0.68)和LTT(0.72),这与业务多样性和技术整合有关。作为中国首次在全国范围内将机器学习应用于生态农场类型学,本研究为指导农业可持续转型的针对性政策提供了一个基于证据的框架。
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引用次数: 0
The temporal effect of urban landscape pattern on the spatiotemporal heterogeneity of water-related ecosystem services: evidence from Suzhou, China (2004–2022) 城市景观格局对水生态系统服务时空异质性的影响——以苏州为例(2004-2022)
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114589
Haonan Hou , Qinghai Guo , Jinxin Guo , Gang Lian , Dou Zhang , Yulong Zhang
Changes in urban landscape patterns significantly influence the functioning of water-related ecosystem services (WESs). However, existing research often focuses on the spatial correlation mechanisms between landscape patterns and WES, resulting in a limited understanding of their dynamic mechanisms across the temporal dimension. This study systematically analyzed landscape pattern changes in Suzhou, China, from 2004 to 2022, quantifying multiple water-related ecosystem services, including water yield, habitat quality, soil conservation, nitrogen and phosphorus export. The Geographically and Temporally Weighted Regression (GTWR) model was employed to investigate the temporal effects of landscape pattern changes on WESs throughout the study period. Our findings revealed that: (1) WESs exhibited distinct temporal variation patterns, with habitat quality showing linear decline, nitrogen and phosphorus exports following V-shaped trajectories, and water yield and soil retention displaying M-shaped fluctuations. All landscape pattern changes slowed in magnitude after 2013. (2) Among multiple landscape indicators with significant effects (p < 0.05), landscape connectivity emerged as the key driver for various WESs. (3) The impact intensity of landscape aggregation and fragmentation on all WESs declined sharply after 2019. Notably, the abrupt decrease in fragmentation's influence led to a shift in the dominant factor for nitrogen and phosphorus exports—from fragmentation to diversity—post-2019. (4) Landscape patterns simultaneously enhance one service while suppressing another; however, this relationship is not static and may evolve into synergistic promotion of multiple services over time. This study analyzes the temporal dynamics of landscape patterns' influence on WESs, highlighting the importance of incorporating temporal dimensions into ecosystem services research.
城市景观格局的变化显著影响与水有关的生态系统服务功能。然而,现有的研究往往侧重于景观格局与WES之间的空间关联机制,导致对其在时间维度上的动态机制认识有限。本研究系统分析了2004 - 2022年苏州市景观格局的变化,量化了水量、生境质量、土壤保持、氮磷输出等多个与水相关的生态系统服务。采用地理和时间加权回归(GTWR)模型研究了景观格局变化对WESs的时间影响。结果表明:(1)WESs表现出明显的时间变化特征,生境质量呈线性下降,氮磷输出呈v型变化,产水量和土壤保持呈m型波动。2013年后,各景观格局变化幅度均有所放缓。(2)在多个影响显著的景观指标中(p < 0.05),景观连通性成为各景观ess的关键驱动因素。(3) 2019年以后,景观聚集破碎化对各WESs的影响强度急剧下降。值得注意的是,破碎化影响的急剧下降导致2019年后氮磷出口的主导因素从破碎化转向多样性。(4)景观格局在促进一种服务的同时抑制另一种服务;然而,这种关系不是静态的,可能随着时间的推移演变成多种服务的协同推广。本研究分析了景观格局对WESs影响的时间动态,强调了将时间维度纳入生态系统服务研究的重要性。
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引用次数: 0
Where should livestock go? Integrating soil erosion risk and spatial fairness in grazing management 牲畜应该去哪里?整合土壤侵蚀风险与放牧管理的空间公平性
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114507
Zeren Dawa, Rui Liu, He Zhang, Runcan Han, Qi Zhou
Grassland ecosystems in alpine pastoral regions commonly face dual challenges of ecological degradation and spatial inequality in resource allocation. To address this, this study develops and applies a novel optimization framework that integrates biophysical risk assessment, socio-spatial fairness quantification, and mathematical optimization. The methodological framework first employs the Revised Universal Soil Loss Equation (RUSLE) model to simulate soil erosion and establish ecological thresholds, identifying areas of high vulnerability. Second, this study constructs a spatial fairness index (q) based on key spatial factors to quantify grazing convenience and resource accessibility. This analysis revealed a significant mismatch, where areas with lower fairness scores paradoxically bore higher realistic grazing pressures. Finally, this study utilizes a quadratic programming model to optimize livestock allocation across 97 villages. The model minimizes structural deviation from the original distribution while adhering to the dual constraints of ecological erosion thresholds (upper limit) and fairness-adjusted stocking densities (lower limit). This integrated methodology was applied to a typical alpine pastoral region. Optimization results demonstrate the framework’s efficacy: ecological pressure in high-risk areas was significantly reduced, while under grazed, low-erosion areas received compensatory increases. This redistribution was achieved while increasing the total regional stocking by 9.25% and achieving a 45% reduction in the squared deviation from the original grazing structure. This study’s primary contribution is a replicable, data-driven strategy that effectively integrates and operationalizes ecological sustainability and social equity in pastoral management.
高寒牧区草地生态系统普遍面临生态退化和资源配置空间不平等的双重挑战。为了解决这个问题,本研究开发并应用了一个新的优化框架,该框架集成了生物物理风险评估、社会空间公平量化和数学优化。方法框架首先采用修正通用土壤流失方程(RUSLE)模型来模拟土壤侵蚀并建立生态阈值,确定高脆弱性区域。其次,构建基于关键空间因子的空间公平指数(q),量化放牧便利性和资源可达性。这一分析揭示了显著的不匹配,即公平得分较低的地区具有较高的现实放牧压力。最后,利用二次规划模型对97个村庄的牲畜配置进行优化。该模型在遵守生态侵蚀阈值(上限)和公平调整的放养密度(下限)双重约束的同时,最大限度地减少了与原始分布的结构性偏差。将该综合方法应用于典型的高寒牧区。优化结果证明了框架的有效性:高风险地区的生态压力显著降低,而在放牧条件下,低侵蚀地区的生态压力得到了补偿性增加。与此同时,区域总放养量增加了9.25%,与原有放牧结构的方差减小了45%。本研究的主要贡献是提出了一个可复制的、数据驱动的战略,该战略有效地将生态可持续性和社会公平纳入牧区管理并付诸实施。
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引用次数: 0
Dissolved carbon variability in alpine river catchments of the central Tibetan Plateau 青藏高原中部高寒河流集水区溶解碳变化
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114603
Jinlei Kai , Junbo Wang , Jianting Ju , Liping Zhu
Alpine rivers rapidly transport large-stored dissolved carbon (DC) from glaciers and alpine permafrost to downstream aquatic ecosystems. The Tibetan Plateau (TP) is an extraordinarily high-altitude region with ubiquitous alpine rivers undergoing intensified changes due to climate changes. However, the potential impacts on the magnitude and properties of DC in alpine rivers still remain poorly understood. Here, we examined the spatio-temporal variability of DC concentrations and properties across 14 alpine rivers in the central TP. Based on monthly investigations conducted during the open water season, the average concentration of dissolved organic carbon (DOC) and inorganic carbon (DIC) in TP alpine rivers was 1.03 ± 0.73 and 14.73 ± 13.05 mg L−1, respectively. The aromatic degree of dissolved organic matter (DOM) was relatively high with mean SUVA254 of 4.18 ± 1.52 L mg C−1 m−1. Moreover, DOC export rate was found more intensive in glacier fed streams (0.017 ± 0.015 g C km−2 s−1) was found than nonglacier fed rivers (0.009 ± 0.011 g C km−2 s−1). Multiple regression models indicate that riverine DC concentrations were overwhelmingly elevated by vegetation coverage within the subbasins. In the glacier recharging catchments, inputs of summer glacier meltwater significantly enhanced terrigenous humic-like DOM (with higher SUVA254) flushing, which caused nearly constant riverine DOM over seasons. In contrast, nonglacier fed rivers were characterized by a sharp decline in DOM during the post monsoon season. These findings suggest a future scenario of heightened terrestrial leaching and riverine export of DC, driven by the expansion of vegetations and increased glacier derived DOM subsidy under ongoing climate warming and wetting on the TP.
高山河流迅速将冰川和高山永久冻土中大量储存的溶解碳(DC)输送到下游水生生态系统。青藏高原是一个异常高海拔地区,高寒河流普遍存在,气候变化加剧。然而,对高寒河流中DC的大小和性质的潜在影响仍然知之甚少。本文对青藏高原中部14条高寒河流的DC浓度及其特征进行了时空变化分析。在开放水域季节进行的月度调查显示,TP高寒河流溶解有机碳(DOC)和无机碳(DIC)的平均浓度分别为1.03±0.73和14.73±13.05 mg L−1。溶解有机质(DOM)芳香度较高,平均SUVA254为4.18±1.52 L mg C−1 m−1。此外,冰川河流的DOC输出速率(0.017±0.015 g C km−2 s−1)高于非冰川河流(0.009±0.011 g C km−2 s−1)。多元回归模型表明,流域内植被覆盖显著提高了河流DC浓度。在冰川补给集水区,夏季冰川融水的输入显著增强了陆源腐殖质样DOM(具有较高的SUVA254)冲刷,导致河流DOM在季节上几乎不变。相比之下,非冰川河流的特征是在季风季节后DOM急剧下降。这些发现表明,在持续的气候变暖和青藏高原变湿的情况下,受植被扩张和冰川衍生的DOM补贴增加的驱动,未来陆地淋滤和河流输出的DC会增加。
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引用次数: 0
Scalable computer vision-based assessment of bait lamina sticks to quantify soil fauna activity 基于可扩展的基于计算机视觉的诱饵薄片棒评估以量化土壤动物活动
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114593
Adrija Roy , Lukas Thielemann , Masahiro Ryo , Juan Camilo Rivera-Palacio , Konlavach Mengsuwan , Kathrin Grahmann
Soil fauna plays a critical role in ecosystem functions such as nutrient cycling, organic matter decomposition, and soil structure maintenance. Accurately assessing their activity is therefore essential for monitoring soil health. Traditional methods like the bait lamina test, while widely used, rely on manual visual scoring, which can be subjective, time-consuming, and difficult to scale. In this study, we present an automated computer vision approach to quantify soil fauna activity by assessing bait consumption on bait lamina sticks, using high-resolution imagery processed with a Python-based pipeline. We implemented this approach on 159 bait sticks gathered from field plots in Brandenburg, Germany, and compared the automated findings with assessments from five independent human operators. The automated method displayed a strong agreement with manual evaluations, yielding Pearson's r between 0.80 and 0.92, depending on the operator, and Cohen's kappa of 0.48 in categorical concordance. The Bland-Altman analysis revealed that over 90 % of the automated scores were within +/− 0.2 of the manual measurements. This automated technique reduced the time required for analysis in comparison to manual scoring, along with removing operator subjectivity and bias. Although there was an underestimation in identifying fully consumed bait holes, the average difference between the automated and manual scores was only 0.02 (p = 0.0049), suggesting a negligible effect size. The automated approach is straight-forward, reproducible, and flexible, which facilitates the efficient and impartial evaluation of soil fauna activity for large-scale soil health monitoring. Possible improvements could involve enhancing the image-analysis workflow, such as improving hole-detection robustness, reducing sensitivity to coating or lighting variation, and exploring more advanced classification models.
土壤动物在养分循环、有机质分解和土壤结构维持等生态系统功能中起着至关重要的作用。因此,准确评估它们的活动对于监测土壤健康至关重要。传统的方法,如诱饵层测试,虽然广泛使用,但依赖于人工视觉评分,这可能是主观的,耗时的,并且难以扩展。在这项研究中,我们提出了一种自动化的计算机视觉方法,通过评估诱饵薄片棒上的诱饵消耗来量化土壤动物活动,使用基于python的管道处理的高分辨率图像。我们对从德国勃兰登堡野外采集的159根诱饵棒实施了该方法,并将自动化结果与5位独立人工操作人员的评估结果进行了比较。自动化方法与人工评估显示出很强的一致性,皮尔逊r在0.80和0.92之间,这取决于操作者,在绝对一致性方面Cohen的kappa为0.48。Bland-Altman分析显示,超过90%的自动得分与人工测量值的误差在+/ - 0.2以内。与人工评分相比,这种自动化技术减少了分析所需的时间,同时消除了操作员的主观性和偏见。尽管在识别完全消耗的诱饵孔方面存在低估,但自动得分和人工得分之间的平均差异仅为0.02 (p = 0.0049),表明效应大小可以忽略不计。自动化方法具有直接、可复制、灵活等特点,可为大规模土壤健康监测提供高效、公正的土壤动物活动评价。可能的改进包括增强图像分析工作流程,例如提高孔检测的鲁棒性,降低对涂层或光照变化的敏感性,以及探索更高级的分类模型。
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引用次数: 0
Unraveling ecosystem service supply-demand relationships and zoning optimization in the agro-pastoral ecotone of northern China 华北农牧交错带生态系统服务供需关系揭示与分区优化
IF 7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-01-01 DOI: 10.1016/j.ecolind.2025.114590
Yu Bai, Yuxin Wang, Linru Li, Jianmei Fu, Xuefeng Yuan
The agro-pastoral ecotone of northern China (APENC) is a critical ecological security barrier that has long faced imbalances, spatial mismatches, and functional degradation in ecosystem service (ES). Using multi-source remote sensing products and statistical data from 2000 to 2020, this study assessed five ESs in the APENC, including grain production, soil conservation, water yield, carbon storage, and windbreak and sand fixation. The spatiotemporal dynamics of ES supply and demand were quantified, dominant drivers were identified, and a zoning-based optimization framework was developed. From 2000 to 2020, the supply of all ESs increased significantly except for windbreak and sand fixation. In contrast, demand exhibited divergent trajectories, with declining demand for grain production and windbreak and sand fixation, increasing demand for carbon storage and soil conservation, and relatively stable demand for water yield. Although the overall supply-demand ratio improved, windbreak and sand fixation showed persistent deficits. Supply-demand coupling coordination was generally low and was mainly characterized by slightly and nearly uncoordinated states, while coordinated areas occurred only sporadically. The dominant matching pattern was low supply and low demand, whereas areas characterized by low supply and high demand expanded over time. The driving mechanisms shifted from predominantly environmental controls to a coupled regime integrating biophysical conditions and socioeconomic pressures, with vegetation conditions and population-economic intensity emerging as key interactive drivers. The proposed zoning scheme supports differentiated strategies for supply enhancement, demand regulation, and resilience strengthening, and provides guidance for ecological function improvement and spatial governance in the APENC.
中国北方农牧交错带(APENC)是一个长期面临生态系统服务失衡、空间失配和功能退化的重要生态安全屏障。利用2000 - 2020年的多源遥感产品和统计数据,对APENC的粮食生产、水土保持、产水量、碳储量和防风固沙5个生态效益进行了评价。在此基础上,量化了ES供需的时空动态,确定了主导驱动因素,并构建了基于分区的优化框架。2000 - 2020年,除防风林和固沙外,其余土壤的供给量均显著增加。而对粮食生产和防风固沙的需求呈下降趋势,对碳储存和土壤保持的需求呈上升趋势,对出水量的需求相对稳定。尽管总体供需比有所改善,但防风林和固沙仍存在持续不足。供需耦合协调性普遍较低,主要表现为轻微和近乎不协调的状态,而协调区域仅零星出现。低供给和低需求是主要的匹配模式,而低供给和高需求的区域随着时间的推移而扩大。驱动机制从主要的环境控制转变为生物物理条件和社会经济压力的耦合机制,植被条件和人口-经济强度成为关键的交互驱动因素。建议的分区方案支持差异化的供应增强、需求调节和弹性增强策略,并为APENC的生态功能改善和空间治理提供指导。
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引用次数: 0
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Ecological Indicators
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