Science of the Total Environment最新文献_第5页

Reimagining urban air-quality governance: A systems-thinking framework. 重新构想城市空气质量治理：一个系统思考框架。

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-05 DOI: 10.1016/j.scitotenv.2025.181059

Harshit Gujral, Om Damani, Anshul Agarwal, Christoph Becker, Meredith Franklin, Teresa Kramarz, Ronak Sutaria, Sagnik Dey, Steve Easterbrook

Despite stringent ambient air quality standards, air pollution remains a persistent issue in many regions due to inadequate policy implementation at the local level. This reflects a form of policy resistance where misaligned stakeholder goals undermine otherwise well-intentioned governmental interventions, highlighting the need for realignment around common objectives to achieve meaningful progress. We apply a systems thinking approach to identify implementation gaps in air quality management, using India as a focal point. Adapting the Integrated Air Quality and Climate Change (IAQCC) framework, we construct causal loop diagrams (CLDs) to map the complex feedback relationships among policy enforcement, data infrastructure, stakeholder behavior, and health outcomes. Through a literature review and expert consultations, we identify three loops that perpetuate policy stagnation: (1) insufficient monitoring data hampers source identification, policy evaluation, and refinement, (2) fragmented jurisdictional authority hinders coordination among stakeholders, and (3) weak local compliance erodes public trust and engagement. All three loops stem from the absence of a unifying objective. We propose reorienting the system around a public health goal, such as reductions in premature mortality or asthma incidence, to align stakeholder incentives and reduce resistance to local policy implementation. We identify three key leverage points to enable this realignment: (1) establish integrated and accessible air-and-health data platforms, (2) coordinate across jurisdictional boundaries through airshed-based governance, and (3) empower citizen-science and community-led oversight. This approach shifts the focus from top-down technocratic management to participatory, democratic governance, showing how targeted, strategic interventions can produce improvements in air quality management.

尽管有严格的环境空气质量标准，但由于地方一级政策执行不力，空气污染在许多地区仍然是一个持续存在的问题。这反映了一种形式的政策阻力，即利益相关者目标不一致破坏了原本善意的政府干预，突出了围绕共同目标进行重新调整以取得有意义进展的必要性。我们采用系统思考的方法来确定空气质量管理的实施差距，以印度为焦点。根据综合空气质量和气候变化（IAQCC）框架，我们构建了因果循环图（cld），以映射政策执行、数据基础设施、利益相关者行为和健康结果之间的复杂反馈关系。通过文献回顾和专家咨询，我们确定了导致政策停滞的三个循环：(1)监测数据不足阻碍了来源识别、政策评估和完善；(2)分散的管辖权阻碍了利益相关者之间的协调；(3)地方合规不力侵蚀了公众的信任和参与。这三个循环都源于缺乏统一的目标。我们建议围绕公共卫生目标重新调整系统，例如降低过早死亡率或哮喘发病率，以协调利益相关者的激励并减少对地方政策实施的阻力。我们确定了实现这一调整的三个关键杠杆点：(1)建立综合和可访问的空气和健康数据平台，(2)通过基于空气区的治理跨管辖边界进行协调，以及(3)授权公民科学和社区主导的监督。这种方法将重点从自上而下的技术官僚管理转移到参与性的民主治理，展示了有针对性的战略干预如何能够改善空气质量管理。

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引用次数: 0

Microplastic contaminations in edible seaweed Caulerpa racemosa across Indonesian tropical seawaters related to land uses: Implication on human health. 印度尼西亚热带海域中与土地利用有关的食用海藻总状藻中的微塑料污染：对人类健康的影响。

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-05 DOI: 10.1016/j.scitotenv.2025.181110

Rahmadyfa Maulida Azzahrah, Andrio Adiwibowo, Athila Zahra Ariesta Akhmad

Edible seaweed, specifically Caulerpa racemosa, is harvested from both inland and island environments across Indonesian waters. However, recent developments and land-use changes from intact ecosystems to urbanized areas have threatened seaweed habitats through microplastic contamination. This study evaluates the abundance of microplastics in consumed seaweed from inland and island habitats, considering land-use variables and conducting health risk assessments. The results show that seaweed harvested from islands contains lower microplastic average abundance and standard deviation (1.77 ± 1.48 particles/g) than seaweed harvested from inland sources (3.56 ± 2.84 particles/g). The microplastic content in seaweed is influenced by the distance to developed areas. Additionally, fibers and fragments in the seaweed are positively correlated with human population density and size of developed areas. Based on CMPI, fragment has affected C. racemosa in island environments as well as fiber in inland areas. PE, PP, and PS are common types of polymers. Health risk assessments based on Average Daily Intake indicate that children and women are more vulnerable to these contaminants. These findings inform relevant stakeholders about the importance of considering island environments for the sustainable and healthy harvest of seaweed.

可食用海藻，特别是总状藻，在印度尼西亚水域的内陆和岛屿环境中都有收获。然而，最近的发展和土地利用的变化，从完整的生态系统到城市化地区，已经通过微塑料污染威胁到海藻的栖息地。本研究评估了来自内陆和岛屿栖息地的食用海藻中微塑料的丰度，考虑了土地利用变量并进行了健康风险评估。结果表明，海岛海带的微塑料平均丰度和标准差（1.77±1.48颗粒/g）低于内陆海带（3.56±2.84颗粒/g）。海藻微塑料含量受离发达地区距离的影响。此外，海藻中的纤维和碎片与人口密度和发达地区的规模呈正相关。基于CMPI，片段不仅影响了内陆地区的纤维，也影响了岛屿环境中的总状伞。PE、PP和PS是常见的聚合物类型。基于每日平均摄入量的健康风险评估表明，儿童和妇女更容易受到这些污染物的影响。这些发现使相关利益攸关方了解了考虑岛屿环境对海藻可持续和健康收获的重要性。

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引用次数: 0

Corrigendum to "Plant water source effects on plant-soil feedback for primary succession of terrestrial ecosystems in a glacier region in China" [Sci. Total Environ. 927 (2024) 172269]. “中国冰川区陆地生态系统原始演替中植物水源对植物-土壤反馈的影响”[Sci.]环境科学学报。927(2024):172269。

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-05 DOI: 10.1016/j.scitotenv.2025.181123

Wenchang Dong, Genxu Wang, Juying Sun, Li Guo, Xiangyang Sun

引用次数: 0

Corrigendum to "Nitrogen and sulfur cycling and their coupling mechanisms in eutrophic lake sediment microbiomes" [Science of the total Environment, 928 (2024), 172518]. “富营养化湖泊沉积物微生物群氮硫循环及其耦合机制”[j].全环境科学，928(2024),172518。

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-05 DOI: 10.1016/j.scitotenv.2025.181140

Dandan Zhang, Fei Liu, Yuchun Yang, Mingyue Li, Kun Wu, Mingyang Niu, Cheng Wang, Zhili He, Qingyun Yan

引用次数: 0

Persistent organic pollutants in migratory birds from wetlands of southern Primorye, Russia 俄罗斯滨海边疆区南部湿地候鸟体内的持久性有机污染物

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-05 DOI: 10.1016/j.scitotenv.2025.181150

Maksim A. Belanov , Maksim M. Donets , Aleksandra D. Borovkova , Kristina R. Masaleva , Egor M. Shchelkanov , Angelina S. Shramkova , Dmitry V. Pankratov , Vasiliy Yu. Tsygankov

The study focuses on the accumulation and biotransformation of persistent organic pollutants (POPs), including organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), in the organs of migratory birds from the family Anatidae inhabiting southern Primorye, Russia. Feathers, liver, and breast muscle samples for the analysis were collected from 26 individuals of six anatid species in Lake Khanka and the Peschany Peninsula. The total POP content in feathers ranged from 0.4 to 44.5 ng/g dry weight (dw); in muscles, from 9.0 to 282.4 ng/g lipid weight (lw); and in the liver, from 12.1 to 1117.1 ng/g lw. In general, POP concentrations did not differ significantly (p > 0.05). The predominance of DDT metabolites (p,p’-DDE) and HCH isomers (β- and δ-HCH) indicated the long-term circulation of these substances in the ecosystem. PCBs were represented by both lower (28) and higher chlorinated congeners (118, 153, 138, and 180), with the latter accumulated mainly in species that come in contact with bottom sediments, i.e., diving ducks (Greater Scaup and Tufted Duck). The observed differences between the species in POP accumulation are associated with their ecological characteristics including diet, migration routes, and habitats. The results show that the pollution levels in southern Primorye are lower or comparable to those reported for other Asian regions, but the global background of pesticides still continues to have an impact on ecosystems.

本研究的重点是居住在俄罗斯滨海边区南部的鸭科候鸟器官中持久性有机污染物（POPs）的积累和生物转化，包括有机氯农药（OCPs）和多氯联苯（PCBs）。分析的羽毛、肝脏和胸肌样本采集于康卡湖和Peschany半岛的6种无肢动物的26个个体。羽毛中总POP含量为0.4 ~ 44.5 ng/g干重（dw）；在肌肉中，脂质重量（lw）为9.0 ~ 282.4 ng/g；在肝脏中，从12.1到1117.1 ng/g lw。总体而言，POP浓度差异不显著（p > 0.05）。滴滴涕代谢物（p,p ' - dde）和HCH异构体（β-和δ-HCH）的优势表明这些物质在生态系统中长期循环。多氯联苯以低氯同系物（28）和高氯同系物（118、153、138和180）为代表，后者主要积聚在与海底沉积物接触的物种中，即潜水鸭（大鳞鸭和丛绒鸭）。所观察到的不同物种在POP积累方面的差异与它们的生态特征有关，包括饮食、迁徙路线和栖息地。结果表明，滨海边疆区南部的污染水平低于或与其他亚洲地区的污染水平相当，但全球农药背景仍在继续对生态系统产生影响。

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引用次数: 0

Perceived drought exposure in small communities of the United States: Demographic, attitudinal, and metric-based drivers 感知干旱暴露在美国的小社区：人口统计，态度和基于指标的驱动因素。

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-04 DOI: 10.1016/j.scitotenv.2025.180992

Sadaf Mehrabi , Ingrid Cintura Rojas , Antonio Arenas Amado , Yu Wang , Kaoru Ikuma

Droughts in the U.S. are intensifying and, in many regions, becoming more frequent and longer under climate change, placing disproportionate pressure on small and under-resourced water systems. Yet, as with many environmental risks, public drought perception frequently diverges from technical assessments, weakening risk communication and complicating adaptation and policy efforts. However, the extent to which underlying factors shape this divergence remains underexplored. Using nationally representative survey data (N = 2551) linked to U.S. Drought Monitor (USDM) indicators, we examined how the public perceived drought exposure aligns with physical drought metrics and individual-level factors. We applied XGBoost as an interpretable machine learning model to identify the strongest environmental and cognitive predictors. Results showed that recent drought intensity, particularly cumulative intensity over the most recent two-year window, was the dominant predictor of perceived drought exposure. Age and religiosity emerged as the strongest sociodemographic predictors, with older and less religious individuals exhibiting higher perceptual accuracy. Notably, high self-reported familiarity with wastewater treatment and heightened concern over flooding were associated with misalignment between perceived and physical drought conditions, suggesting that technical knowledge and hazard sensitivity may not always enhance accuracy and may lead to cognitive biases. These findings suggest that drought awareness depends not only on physical exposure but also on how people process information based on personal beliefs and trust in institutions. Our integrated modeling approach provides a transferable framework for other national or regional contexts to enable cross-country comparisons of environmental risk perception and communication effectiveness. This work highlights the need for fundamentally rethinking the conventional top-down communication toward more contextual, trust-centered strategies for climate adaptation, particularly in vulnerable communities.

美国的干旱正在加剧，在气候变化的影响下，许多地区的干旱变得更加频繁和持续时间更长，给小型和资源不足的供水系统带来了不成比例的压力。然而，与许多环境风险一样，公众对干旱的认识往往与技术评估存在分歧，这削弱了风险沟通，使适应和政策努力复杂化。然而，潜在因素在多大程度上形成了这种差异仍未得到充分探讨。利用与美国干旱监测（USDM）指标相关的全国代表性调查数据（N = 2551），我们研究了公众对干旱暴露的感知如何与物理干旱指标和个人水平因素相一致。我们将XGBoost作为一个可解释的机器学习模型来识别最强的环境和认知预测因子。结果表明，最近的干旱强度，特别是最近两年的累积强度，是感知干旱暴露的主要预测因子。年龄和宗教信仰是最强的社会人口预测因素，年龄越大，宗教信仰越少的人表现出更高的感知准确性。值得注意的是，自我报告对废水处理的高度熟悉和对洪水的高度关注与感知和实际干旱条件之间的不一致有关，这表明技术知识和危险敏感性可能并不总是提高准确性，并可能导致认知偏差。这些发现表明，干旱意识不仅取决于物理暴露，还取决于人们如何基于个人信仰和对机构的信任来处理信息。我们的综合建模方法为其他国家或地区背景提供了一个可转移的框架，以实现对环境风险感知和沟通有效性的跨国比较。这项工作强调，需要从根本上重新思考传统的自上而下的沟通方式，转向更有背景、更以信任为中心的气候适应战略，特别是在脆弱社区。

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引用次数: 0

Long-term community monitoring of volatile organic compounds and methane in Erie, Colorado: sources and health risks 科罗拉多州伊利市挥发性有机化合物和甲烷的长期社区监测：来源和健康风险

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-04 DOI: 10.1016/j.scitotenv.2025.181100

Seong-Joon Kim , I-Ting Ku , Yong Zhou , Da Pan , Lena Low , Morgan Frazier , Brent Buck , Jeffrey L. Collett Jr.

Volatile organic compounds (VOCs) emitted from oil and natural gas (O&NG) operations can impact neighboring residential areas, adding to levels contributed by other sources, including traffic, industry, landfills, and biogenic emissions. In Erie, a growing community in the Denver-Julesburg oil and gas production basin in northern Colorado, VOCs and methane were monitored at four locations for two years to investigate their sources and identify potential exposure risks. Among 51 measured VOCs, light-alkanes, including ethane, propane, n-butane, i-butane, i-pentane, and n-pentane, were the most abundant species, accounting for 85.9 ± 4.26 % of total measured VOCs across the sampling period. Methane (2.56 ± 0.71) and total VOC concentrations (36.7 ± 37.2) showed clear seasonal variations, with the highest and lowest levels in winter and summer, respectively, reflecting changing meteorological conditions. Ratios of i/n-pentane (mean 1.10 ± 0.11) reflected a mix of emissions from urban and O&NG sources. Ethane–methane correlations were strongest near the pipeline leak and weakest near the landfill, reflecting differing source influences. Positive matrix factorization analysis revealed that O&NG-related sources (accounting for 71.8 % of total measured VOCs) were dominant among five major factors, while urban emissions, including vehicular exhaust, also comprised an important source factor. None of the cancer and non-cancer risks for chronic inhalation exposure exceeded the tolerable and acceptable safety levels set by the US EPA. Findings from this study could be utilized for future cohort or epidemiological studies in residential areas near O&NG operations.

石油和天然气（O&；NG）作业排放的挥发性有机化合物（VOCs）会影响附近的居民区，增加其他来源（包括交通、工业、垃圾填埋场和生物源排放）的排放水平。在科罗拉多州北部丹佛-朱尔斯堡油气生产盆地的Erie，一个不断发展的社区，在四个地点监测了挥发性有机化合物和甲烷，为期两年，以调查其来源并确定潜在的暴露风险。51种VOCs中，乙烷、丙烷、正丁烷、i-丁烷、i-戊烷、正戊烷等轻烷烃种类最多，占总VOCs的85.9±4.26%。甲烷浓度（2.56±0.71）和总VOC浓度（36.7±37.2）具有明显的季节变化，分别在冬季和夏季最高和最低，反映了气象条件的变化。i/正戊烷的比值（平均值1.10±0.11）反映了城市和臭氧和天然气排放源的混合排放。乙烷-甲烷相关性在管道泄漏附近最强，在垃圾填埋场附近最弱，反映了不同来源的影响。正矩阵分解分析表明，油气相关源（占总VOCs测量值的71.8%）在5个主要因素中占主导地位，而城市排放（包括汽车尾气）也是一个重要的源因素。慢性吸入暴露的癌症和非癌症风险均未超过美国环保署规定的可容忍和可接受的安全水平。本研究的结果可用于未来在油田和天然气作业附近居民区进行队列研究或流行病学研究。

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引用次数: 0

Environmental DNA as a tool for detecting ocean outfall impacts and environmental gradients in coastal ecosystems 环境DNA作为检测海洋排放物影响和沿海生态系统环境梯度的工具

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-04 DOI: 10.1016/j.scitotenv.2025.181105

Jodie Gibb , Megan Huggett , Margaret Platell , Geoff MacFarlane , Richard Man Kit Yu , Craig Evans , Megan Andrew-Priestley , Michael Stat

As pressures on coastal ecosystems intensify, there is a growing need for sensitive, scalable tools to detect early signs of ecological change. Environmental DNA (eDNA) metabarcoding has emerged as a powerful approach for marine biomonitoring, providing a non-invasive, high-resolution alternative to traditional methods. This study applied eDNA metabarcoding to assess potential impacts of effluent discharge from the Belmont Wastewater Treatment Works (WWTW) ocean outfall in New South Wales, Australia. Benthic infauna were sampled from sandy sediments at ∼25 m depth along north-east and south-west transects extending up to 2 km from the outfall. Eukaryotic (18S rDNA) and prokaryotic (16S rDNA) communities were sequenced and compared with data from concurrent morpho-taxonomic surveys.

No clear evidence of ecological disturbance from effluent discharge was detected using eDNA, consistent with morpho-taxonomic results. Nevertheless, eDNA identified a broader range of taxa, revealing distinct spatial structuring in community composition, particularly along the southern transect where richness correlated with sediment grain size. This spatial pattern was not evident in the morpho-taxonomic dataset, highlighting the greater sensitivity of molecular methods to habitat-driven gradients. A weak but significant correlation between eDNA read counts and morpho-taxonomic abundance supported the use of metabarcoding data as a proxy for relative abundance.

These findings demonstrate that eDNA metabarcoding complements traditional biomonitoring, offering enhanced sensitivity to environmental gradients even in the absence of detectable anthropogenic impact, and extends the reach of conventional surveys by capturing otherwise undetectable taxa.

随着对沿海生态系统的压力加剧，越来越需要敏感的、可扩展的工具来检测生态变化的早期迹象。环境DNA （eDNA）元条形码已成为海洋生物监测的一种强有力的方法，为传统方法提供了一种非侵入性、高分辨率的替代方法。本研究应用eDNA元条形码技术评估了澳大利亚新南威尔士州贝尔蒙特污水处理厂（WWTW）海洋排放口的废水排放的潜在影响。在距离排放口2公里的东北和西南样带，从25米深的沙质沉积物中取样底栖动物。对真核生物（18S rDNA）和原核生物（16S rDNA）群落进行了测序，并比较了同期形态分类调查的数据。eDNA未发现污水排放造成生态干扰的明显证据，与形态分类学结果一致。然而，eDNA鉴定出了更广泛的分类群，揭示了群落组成的独特空间结构，特别是在丰富度与沉积物粒度相关的南部样带。这种空间格局在形态分类学数据集中并不明显，这表明分子方法对生境驱动的梯度具有更高的敏感性。eDNA读取计数与形态分类丰度之间存在微弱但显著的相关性，支持使用元条形码数据作为相对丰度的代理。这些发现表明，eDNA元条形码补充了传统的生物监测，即使在没有可检测到的人为影响的情况下，也能提高对环境梯度的敏感性，并通过捕获其他无法检测到的分类群扩展了传统调查的范围。

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引用次数: 0

Do downdrafts always induce near-surface ozone enhancements above the Amazon region? 下沉气流是否总是导致亚马逊地区近地表臭氧增强？

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-04 DOI: 10.1016/j.scitotenv.2025.181093

Gilmar Henrique Santana Silva , Carla de Souza Farias , Flávio Augusto Farias D’Oliveira , Gilberto Fisch , Raoni Aquino Silva de Santana , Roseilson Souza do Vale , Julia Clarinda Paiva Cohen , Rodrigo Augusto Ferreira de Souza , Cléo Quaresma Dias-Júnior

The investigation of atmospheric gases in the central Amazon, with emphasis on tropospheric ozone (O

_{3}

), is fundamental to understanding impacts of climate change and anthropogenic activities. While previous studies associated downdrafts with near-surface O

_{3}

-enhancement, cases of O

_{3}

-decrease are still less explored. This study was conducted during the field mission from GoAmazon 2014/15 project. Experimental data and vertical O

_{3}

profiles from ERA5 reanalysis were used. 73 downdraft events were identified, of which around 51% were associated with near-surface O

_{3}

-enhancement and the rest with decrease or minor variations. Numerical simulations were performed using the WRF-Chem model to investigate the three-dimensional dynamics of O

_{3}

during downdraft events. Two representative cases in O

_{3}

concentrations were selected to assess the model’s performance. The study revealed that the variability of near-surface O

_{3}

is driven by the O

_{3}

concentration in the middle troposphere as well as the wind direction patterns that precede the downdrafts. Our analysis shows that downdrafts carry air masses that have higher or lower concentrations of O

_{3}

than those near the surface. It was observed that wind direction, O

_{3}

concentration in the middle troposphere, and O

_{3}

concentration near the surface are identified as key factors that define whether the occurrence of a downdraft will result in an increase or decrease in surface O

_{3}

. Enhancement events were associated with an increase of 11 ppbv, while decrease events showed reductions of 10 ppbv. These results may contribute to better parameterizations of some chemical processes in atmospheric models.

对亚马逊中部大气气体的调查，重点是对流层臭氧（O3），是了解气候变化和人为活动影响的基础。虽然以前的研究将下沉气流与近地表臭氧增强联系起来，但对臭氧减少的情况的探索仍然较少。本研究是在GoAmazon 2014/15项目的实地考察期间进行的。实验数据和ERA5再分析得到的O3垂直剖面。共发现73个下沉气流事件，其中约51%与近地表臭氧增强有关，其余则与臭氧减少或变化较小有关。利用WRF-Chem模型进行了数值模拟，研究了下降气流过程中O3的三维动力学。选取两个具有代表性的O3浓度案例来评估模型的性能。研究表明，近地面O3的变化受对流层中层O3浓度和下降气流前的风向模式驱动。我们的分析表明，下沉气流携带的气团比地表附近的气团具有更高或更低的臭氧浓度。结果表明，风向、对流层中层O3浓度和近地面O3浓度是决定下沉气流发生后地面O3是增加还是减少的关键因素。增强事件与11 ppbv的增加有关，而减少事件显示10 ppbv的减少。这些结果可能有助于在大气模式中更好地参数化某些化学过程。

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引用次数: 0

Are intertidal habitats keeping up with nutrient export? Insights from modelling climate and management scenarios 潮间带栖息地是否能跟上营养物质的输出？从模拟气候和管理情景中获得的见解

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment

Pub Date : 2025-12-04 DOI: 10.1016/j.scitotenv.2025.180953

F. Afonso , Z. Teixeira , M.C. Austen , S. Broszeit , C. Antunes , C. Rocha , A.C. Brito

Habitat loss and eutrophication are major threats to estuarine systems leading to biodiversity decline and loss of ecosystem services. These stressors are particularly severe in estuaries situated in highly urbanised and agriculture-dominated landscapes. While several studies have assessed nutrient dynamics in estuaries, few have focused specifically on the role of intertidal habitats as buffer areas, highlighting the novelty of this study by assessing if nutrient retention abilities of buffer habitats are able to keep up with the high nutrient export from nearby land-uses. This study employs two InVEST models (Nutrient Delivery Ratio and Habitat Quality). Scenarios also employed different management strategies and climate-change simulations to assess alterations in nutrient export and habitat quality. Agricultural and grazing fields were the largest sources of nutrients into the system, while intertidal habitats, particularly saltmarshes, exhibited high nutrient retention rates (> 80 %). Nutrient export was most severely affected by management scenarios, particularly Business-as-usual and Ecological Protection, while no significant changes were observed in Climate-change scenarios. Contrarily, habitat quality declined under the Economic Development scenario. For example, filamentous algae lost 22.02 % of area under excellent conditions. Nutrient export remained unaffected by the Economic Development Scenario. Saltmarshes were consistently of high quality, while seagrasses were in poorer condition (less than 1 % of the seagrass area was under excellent conditions). This study also revealed that intertidal habitats are keeping up with nutrient export, however, the upraising impacts of climate and land-use changes require update management strategies that actively change the practices in the region. Insights from such modelling approaches can aid decision-makers, offering guidance for developing policies regarding conservation of natural habitats and sustainable agriculture practices.

栖息地丧失和富营养化是河口系统面临的主要威胁，导致生物多样性下降和生态系统服务功能丧失。这些压力源在高度城市化和农业为主的河口地区尤为严重。虽然有几项研究评估了河口的营养动态，但很少有研究专门关注潮间带栖息地作为缓冲区的作用，通过评估缓冲栖息地的营养保留能力是否能够跟上附近土地利用的高营养输出，突出了这项研究的新颖性。本研究采用两种InVEST模型（养分输送比和生境质量）。情景还采用了不同的管理策略和气候变化模拟来评估养分输出和生境质量的变化。农田和牧场是系统中最大的养分来源，而潮间带生境，特别是盐沼，表现出较高的养分保留率（> 80%）。管理情景对养分出口的影响最为严重，尤其是“一切照旧”和“生态保护”情景，而气候变化情景对养分出口的影响不显著。相反，在经济发展情景下，生境质量下降。例如，丝状藻类在优良条件下损失22.02%的面积。营养品出口仍未受到经济发展设想的影响。盐沼始终是高质量的，而海草的状况较差（不到1%的海草面积处于良好状态）。该研究还表明，潮间带生境正在跟上养分输出的步伐，然而，气候和土地利用变化的上升影响需要更新管理策略，积极改变该地区的做法。从这种建模方法中获得的见解可以帮助决策者，为制定保护自然栖息地和可持续农业实践的政策提供指导。

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引用次数: 0