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Spatial distribution of available phosphorus in surface road and trackway surface materials on a sheep farm in Ireland 爱尔兰一个养羊场地面道路和人行道表面材料中可用磷的空间分布
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-18 DOI: 10.3389/fenvs.2024.1457970
Owen Fenton, Karen Daly, Pat Tuohy, John Cardiff, Simon Leach, Lungile Senteni Sifundza, John Murnane
Farm roadway runoff is a high-risk source of pollution when connectivity with waters occurs. Nutrients in this runoff are dominated by fresh animal deposits, but recent dairy and beef farm studies showed that available phosphorus (P) accumulates in roadway surface material and can be lost in runoff. A current knowledge gap is to examine available P concentrations in unsealed roadway and trackway (non-maintained) network of a lowland sheep farm. The present study focused on a 45 ha farm stocked with 544 sheep in south-east Ireland. Ten locations were sampled along with the adjacent fields for available P (i.e., Morgan’s P) and ancillary parameters (e.g., pH, total P and heavy metals) in December 2022. The first sampling location was on an aggregate roadway and the other nine were on trackways representing an older aggregate roadway network used by the flock but now covered with soil and grass. Results showed a distinct difference in surface material pH between roadway and trackway locations. Trackways had a pH that mimicked adjacent fields around the agronomic optimum for grassland of ∼6.2. All sampling locations had elevated available P concentrations, ranging from 26.3 to 111.0 mg L−1 (mean 62.8 mg L−1), similar to the spatial distribution for dairy farms but above those found at beef farms previously studied. The highest available P concentrations were found in roadway and trackway sections adjacent to the farmyard. Other elevated sampling areas were on trackways (87.3 or 97.7 mg P L−1) away from the farmyard where sheep are funnelled to pasture, stop to seek shade, urinate and defecate but do not graze. By contrast the average available P concentration for the surrounding fields was 8.4 mg L−1 with a range of 2.7–15.9 mg L−1. Two sampling areas combine to create a critical source area where a high available P source becomes visibly mobilised as runoff during rainfall, discharges into an open drainage ditch, which is then connected to a local stream. Breaking the pathway before runoff enters the open ditch could be a cheap and effective way of mitigating nutrient losses at these two locations.
当与水域发生连通时,农场路面径流是一种高风险污染源。这种径流中的营养物质主要是新鲜动物沉积物,但最近的奶牛场和肉牛场研究表明,可用磷(P)会在路面材料中累积,并随径流流失。目前的一个知识空白是研究低地绵羊养殖场未封闭路面和跑道(非维护)网络中的可用磷浓度。本研究的重点是爱尔兰东南部一个面积为 45 公顷、存栏 544 只羊的农场。2022 年 12 月,对 10 个地点及邻近田地进行了可用磷(即摩根磷)和辅助参数(如 pH 值、总磷和重金属)采样。第一个采样点位于集料路面上,其他九个采样点位于代表羊群使用的旧集料路面网络的履带上,但现在已被土壤和草覆盖。结果显示,路面和跑道表面材料的 pH 值存在明显差异。人行道的 pH 值与邻近草地农艺学最佳 pH 值 ∼6.2 附近的田地相似。所有采样地点的可利用磷浓度都很高,从 26.3 到 111.0 毫克/升(平均 62.8 毫克/升)不等,与奶牛场的空间分布相似,但高于之前研究的肉牛养殖场。牧场附近的道路和人行道上的 P 浓度最高。其他高浓度采样区位于远离牧场的人行道上(87.3 或 97.7 毫克 P L-1),羊群在人行道上被赶往牧场,停下来寻找阴凉处、大小便,但不在此吃草。相比之下,周围田地的平均可利用磷浓度为 8.4 毫克/升,范围为 2.7-15.9 毫克/升。两个取样区域结合在一起,形成了一个临界源区,在这里,高浓度的可利用钾源在降雨时被径流明显移动,排入一条露天排水沟,然后与当地的一条小溪相连。在径流进入明沟之前切断路径,是减少这两个地方养分流失的一种廉价而有效的方法。
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引用次数: 0
Carbon neutralization frontier tracking 碳中和前沿跟踪
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-18 DOI: 10.3389/fenvs.2024.1388746
Xiaoliang Shi, Jiayin Xin, Aruna Aria, Ji Lu, Tielong Wang, Xiaowei Xu, Yiwen Zhang
This systematic study on the international research trends in carbon neutrality underscores its critical role in combating global warming and advancing sustainable development. By leveraging the “Web of Science Core Collection” databases and employing CiteSpace software for visual analysis, we examined 2223 research papers to track the influence and trends of key countries, institutions, and authors. Our results reveal a significant increase in publication volume, indicating a robust development potential for carbon neutrality research. The study also identifies environmental science, environmental research, and energy and fuel science as central interdisciplinary hubs, highlighting the importance of cross-disciplinary collaboration. Notably, China leads in publication output but has room for improvement in citation impact, suggesting a need for enhanced research quality and international visibility. The study's findings are instrumental for guiding future research directions, policy-making, and interdisciplinary cooperation, particularly in the fields of environmental science and energy, to accelerate progress towards carbon neutrality and global climate governance.
这项关于碳中和国际研究趋势的系统性研究强调了碳中和在应对全球变暖和推动可持续发展中的关键作用。通过利用 "Web of Science Core Collection "数据库和使用 CiteSpace 软件进行可视化分析,我们研究了 2223 篇研究论文,以追踪主要国家、机构和作者的影响力和趋势。研究结果表明,论文发表量大幅增加,表明碳中和研究具有强劲的发展潜力。研究还发现,环境科学、环境研究以及能源和燃料科学是核心的跨学科中心,凸显了跨学科合作的重要性。值得注意的是,中国在出版物产出方面处于领先地位,但在引文影响力方面还有待提高,这表明中国需要提高研究质量和国际知名度。研究结果有助于指导未来的研究方向、政策制定和跨学科合作,特别是在环境科学和能源领域,以加快实现碳中和和全球气候治理。
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引用次数: 0
Heavy metal changes related to land use changes in a karst area: a case study in Changshun, Guizhou Province, China 与岩溶地区土地利用变化有关的重金属变化:中国贵州省长顺县的一项案例研究
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-18 DOI: 10.3389/fenvs.2024.1471160
Xin Jiang, Xingfu Wang, Yi Liu, Yu Huang, Xianfei Huang
Karst areas are often characterized by fragile ecological systems, and environmental pollution has increased the pressures on people living in such regions. This study aimed to investigate the status of pollution caused by heavy metals (Pb, Cd, Hg, As, and Cu) in soils based on different land uses in Changshun County, a karst area in southwestern China. Soil samples were collected from natural forestlands (NFLs), natural brush lands (NBLs), natural pasture lands (NPLs), artificial forestlands (AFLs), artificial brush lands (ABLs), and artificial pasture lands (APLs) for evaluation. The results suggest that the soil profile characteristics of the heavy metals studied herein vary significantly among different land uses. The heavy metal concentrations in all soil samples collected from NFLs were lower than those in samples from other land uses. Forest trees can protect soil from heavy metal pollution caused by atmospheric deposition; this is especially true for Hg. In cultivated forestlands and brush lands, special attention should be devoted to Cd pollution in the soil, which may be caused by the use of fertilizers. Changing both natural and artificial pastoral lands to forestlands could benefit the local ecosystems as it may reduce Hg contamination.
岩溶地区通常具有生态系统脆弱的特点,环境污染增加了该地区居民的生活压力。本研究旨在调查中国西南岩溶地区长顺县不同土地利用条件下土壤中重金属(铅、镉、汞、砷和铜)的污染状况。研究人员从天然林地(NFLs)、天然灌木丛地(NBLs)、天然草场(NPLs)、人工林地(AFLs)、人工灌木丛地(ABLs)和人工草场(APLs)采集土壤样品进行评估。结果表明,本文所研究的重金属在不同土地用途的土壤剖面特征有很大差异。从非林地采集的所有土壤样本中的重金属浓度均低于其他土地用途的样本。林木可以保护土壤免受大气沉降造成的重金属污染;对于汞来说尤其如此。在开垦的林地和灌木丛中,应特别注意土壤中的镉污染,这可能是使用化肥造成的。将天然牧场和人工牧场改为林地可减少汞污染,有利于当地的生态系统。
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引用次数: 0
Long-term trends in water transparency of Tibetan Plateau lakes and the response to extreme climate events 青藏高原湖泊水透明度的长期变化趋势及对极端气候事件的响应
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-18 DOI: 10.3389/fenvs.2024.1450320
Wangming Liu, Huan Xu, Guowei He
Water transparency, as indicated by the Secchi disk depth (Zsd), is a key parameter for assessing the quality of aquatic environments, reflecting the ability of light to penetrate through the water column. In the Tibetan Plateau (TP), where lakes are abundant yet remote and challenging to access, remote sensing techniques offer a promising approach for monitoring Zsd over large spatial scales. In this study, we used the semianalytical -based Zsd algorithm to study the temporal and spatial dynamics of water transparency over TP during the period from 2003 to 2022. The results show that the 173 lakes have a mean value of Zsd is 3.64 ± 2.4 m for long term, and generally with the significantly increasing change trends in the past 20 years. In the central Tibetan Plateau (CTP) region, lake transparency showed a positive correlation with lake surface temperature (r = 0.73) and a negative correlation with precipitation (r = −0.54), highlighting the region’s heightened sensitivity to meteorological changes compared to other areas. The spike in water clarity observed in the CTP region may be linked to alterations in lake hydrodynamics driven by the extremely climate events (i.e., El Niño). These results indicated the importance of considering regional climatic factors when interpreting fluctuations in water transparency.
塞奇盘深度(Zsd)表示的水体透明度是评估水生环境质量的一个关键参数,它反映了光穿透水体的能力。青藏高原(TP)湖泊众多,但地处偏远,难以进入,遥感技术为在大空间尺度上监测 Zsd 提供了一种前景广阔的方法。在本研究中,我们使用基于半解析的 Zsd 算法研究了 2003 年至 2022 年期间高原湖泊水体透明度的时空动态。结果表明,173 个湖泊的 Zsd 长期平均值为 3.64±2.4 m,且近 20 年来总体呈显著上升变化趋势。在青藏高原中部地区,湖泊透明度与湖面温度呈正相关(r = 0.73),与降水量呈负相关(r = -0.54),凸显出该地区与其他地区相比对气象变化的敏感性更高。在 CTP 地区观察到的水透明度飙升可能与极端气候事件(即厄尔尼诺现象)导致的湖泊水动力变化有关。这些结果表明,在解释水透明度波动时,考虑区域气候因素非常重要。
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引用次数: 0
Occurrence, sustainable treatment technologies, potential sources, and future prospects of emerging pollutants in aquatic environments: a review 水生环境中新出现污染物的出现、可持续处理技术、潜在来源和未来前景:综述
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-13 DOI: 10.3389/fenvs.2024.1455377
Qiqi Zhou, Hongfeng Chen, Guijian Liu, Xiaohui Wang
Emerging contaminants (ECs), such as polyfluorinated compounds, antibiotics, microplastics, and nonylphenol, continue to challenge environmental management practices due to their persistence and bioaccumulation potential. This review articulates the critical pathways and environmental risks posed by these contaminants, setting the stage for an in-depth exploration of innovative removal technologies. We spotlight groundbreaking methods that are reshaping the landscape of ECs remediation: membrane filtration technology, constructed wetlands, adsorptive materials, algae-based systems, biological treatments, and advanced oxidation processes. Each method is evaluated for its efficacy in removing ECs, with particular emphasis on sustainability and economic viability. Our findings reveal that integrating these technologies can significantly enhance removal efficiency, offering new directions for environmental policy and practical applications. This article positions these advanced removal technologies at the forefront of the fight against ECs, advocating for their broader adoption to safeguard environmental and public health.
新出现的污染物(ECs),如多氟化合物、抗生素、微塑料和壬基酚,由于其持久性和生物累积潜力,继续对环境管理实践提出挑战。本综述阐述了这些污染物的关键途径和环境风险,为深入探讨创新清除技术奠定了基础。我们重点介绍了重塑氨基甲酸乙酯修复格局的突破性方法:膜过滤技术、人工湿地、吸附材料、藻类系统、生物处理和高级氧化工艺。我们对每种方法去除氨基甲酸乙酯的功效进行了评估,并特别强调了可持续性和经济可行性。我们的研究结果表明,整合这些技术可显著提高去除效率,为环境政策和实际应用提供新的方向。这篇文章将这些先进的去除技术定位为抗击氨基甲酸乙酯的前沿技术,倡导更广泛地采用这些技术来保护环境和公众健康。
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引用次数: 0
The green development effect of science and technology financial policy in China 中国科技金融政策的绿色发展效应
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-13 DOI: 10.3389/fenvs.2024.1463679
Xuxin Zou, Jiadi Min, Shuang Meng
Green development, as a key link in the philosophy of new development, is the only way to achieve sustainable development. However, how science and technology (S&amp;T) finance affects green development remains unclear. Based on panel data of 284 cities in China from 2007 to 2020, the multi-time-point difference-in-differences (DID) model and the mediation model were utilized to analyze the influencing mechanisms and paths of the S&amp;T financial pilot policy on green development. The results show that S&amp;T financial policy can significantly promote green development, for which green innovation (GI) capability, industrial structure advancement (ISA), and industrial structure rationalization (ISR) are important paths. Moreover, the effects of S&amp;T financial policy on green development are heterogeneous: the policy exerts a stronger effect on the central region than on the eastern and western regions, a stronger effect on large cities than on small- and medium-sized cities, and a stronger effect on key cities than on general cities. Therefore, relevant governmental departments should continually optimize S&amp;T financial policy; pay more attention to cities in the western region, small- and medium-sized cities, and general cities; actively foster GI capability; facilitate industrial structure transformation and upgrading; and vigorously support cross-regional exchange and cooperation to jointly realize green development. This study sheds new light on how the S&amp;T finance related policy reform promotes sustainable growth and socio-economic welfare in developing countries.
绿色发展作为新发展理念的关键环节,是实现可持续发展的必由之路。然而,科技(S&amp;T)金融如何影响绿色发展仍不明确。本文基于 2007 年至 2020 年中国 284 个城市的面板数据,利用多时点差分(DID)模型和中介模型,分析科技金融试点政策对绿色发展的影响机制和路径。结果表明,S&amp;T 金融政策能显著促进绿色发展,其中绿色创新(GI)能力、产业结构高级化(ISA)和产业结构合理化(ISR)是重要路径。此外,S&amp;T 金融政策对绿色发展的影响具有差异性:对中部地区的影响强于东部和西部地区,对大城市的影响强于中小城市,对重点城市的影响强于一般城市。因此,相关政府部门应不断优化科技金融政策,更加关注西部地区城市、中小城市和一般城市,积极培育地理信息能力,促进产业结构转型升级,大力支持跨区域交流合作,共同实现绿色发展。本研究为S&amp;T金融相关政策改革如何促进发展中国家的可持续增长和社会经济福利提供了新的视角。
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引用次数: 0
Spatial-temporal variation and influencing factors of ecological environment quality in Jilin Province (China) 吉林省生态环境质量的时空变化及影响因素(中国)
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-13 DOI: 10.3389/fenvs.2024.1446313
Feiyu Wang, Yang Han, Yaping Xu, Ruifei Zhu, Chunmei Qu, Peng Zhang, Stanton Martin, Lijuan Zhuang, Zhuxin Liu, Jiani Zhang, Fang Huang
Jilin Province is a crucial region of interest for agricultural and forestry development in China. The deterioration of its ecological environment could have a severe impact on agricultural production and ecological conservation. A systematic assessment of ecological environment quality in Jilin Province is essential for its sustainable development. In this study, we utilized Landsat data from 1990 to 2020 (every 5 years) to construct the Remote Sensing Ecological Index (RSEI) for Jilin Province. We applied the Sen’s slope estimator and the Mann-Kendall trend test to examine the spatiotemporal changes in ecological environment quality over a 30-year period. Additionally, we employed the Geo-detector to explore the socioeconomic and natural factors influencing ecological environment quality. The results revealed: 1) From 1990 to 2020, the average RSEI index in Jilin Province ranged from 0.586 to 0.699, indicating overall good ecological environment quality. Spatially, ecological environment quality gradually declined from east to west. 2) The RSEI in Jilin Province exhibited an initial increase, followed by a decrease, and then another increase trend. This improvement can be attributed to the implementation of government policies, which reversed the expansion of saline-alkali land. Ecological environment quality significantly improved in the western region of Jilin Province over the 30-year period. 3) Socioeconomic and natural factors both influence ecological environment quality in Jilin Province. Among these factors, vegetation coverage has the most significant impact on the ecological environment quality in the study area, with natural factors exerting a more significant influence than socioeconomic factors. Our research can provide relevant data support for policy-making in Jilin Province.
吉林省是中国农业和林业发展的重要地区。其生态环境的恶化会对农业生产和生态保护造成严重影响。系统地评估吉林省的生态环境质量对其可持续发展至关重要。在本研究中,我们利用 1990 年至 2020 年(每 5 年一次)的 Landsat 数据构建了吉林省的遥感生态指数(RSEI)。我们采用森氏斜率估计器和 Mann-Kendall 趋势检验来研究 30 年间生态环境质量的时空变化。此外,我们还利用地理探测器探讨了影响生态环境质量的社会经济和自然因素。结果显示1)从 1990 年到 2020 年,吉林省平均 RSEI 指数在 0.586 到 0.699 之间,表明生态环境质量总体良好。从空间上看,生态环境质量由东向西逐渐下降。2) 吉林省的 RSEI 呈先上升、后下降、再上升的趋势。这种改善可归因于政府政策的实施,扭转了盐碱地扩张的趋势。30 年间,吉林省西部地区的生态环境质量明显改善。3) 社会经济因素和自然因素都会影响吉林省的生态环境质量。其中,植被覆盖率对研究区生态环境质量的影响最为显著,自然因素的影响比社会经济因素更为显著。我们的研究可为吉林省的政策制定提供相关数据支持。
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引用次数: 0
Environmental regulation, industrial transformation, and green economy development 环境监管、产业转型和绿色经济发展
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-13 DOI: 10.3389/fenvs.2024.1442072
Huimin Shao, Qiong Peng, Fei Zhou, Walton Wider
BackgroundGreen development, which is crucial because of the escalating ecological and environmental issues, is largely driven by industrial transformation and environmental legislation.PurposeThe paper aims to examine the combined effects of environmental regulations and industrial change on the green economy, based on their separate effects.MethodsWe use a fixed-effects regression on panel data covering 30 provinces in China in 2010–2020.ResultsWe reach the following conclusions: environmental regulations and rationalization of the industrial structure both support growth in the green economy, but advancement in the industrial structure hinders it. The combined effect of environmental regulations and advancement and rationalization in the industrial structure has a significantly positive impact on growth in the green economy; it is most pronounced in regions with higher resource endowments and economic development.DiscussionBy providing specific empirical facts, this study clarifies the effects of industrial transformation and environmental regulations on growth in the green economy, contributing to enriching the literature and helping to pave the way to sustainable development.
背景由于生态和环境问题的不断升级,绿色发展至关重要,而绿色发展在很大程度上是由产业转型和环境立法推动的.目的本文旨在研究环境规制和产业变革对绿色经济的综合影响,在此基础上研究它们各自的单独影响.方法我们使用固定效应回归对 2010-2020 年中国 30 个省份的面板数据进行研究.结果我们得出以下结论:环境规制和产业结构的合理化都支持绿色经济的增长,但产业结构的升级阻碍了绿色经济的增长.讨论通过提供具体的经验事实,本研究阐明了产业转型和环境规制对绿色经济增长的影响,有助于丰富相关文献,为可持续发展铺平道路。
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引用次数: 0
Supply chain carbon abatement under different power structures: impact of consumers’ low-carbon preference and carbon tax policy 不同权力结构下的供应链碳减排:消费者低碳偏好和碳税政策的影响
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-13 DOI: 10.3389/fenvs.2024.1376970
Guozhi Li, Mengying Jiang, Yidan Yuan, Xunuo Chen, Dandan Fu
Supply chain carbon abatement is an important way to promote low-carbon transformation of the social economy and address global climate change. This paper analyzes the issue of supply chain carbon abatement under different power structures, as well as the effect of consumers’ low-carbon preference and carbon tax rate on the optimal decisions. This paper constructs five different models, namely ML-NO model, ML-CS model, RL-NO model, RL-CS model and VI model. The research finds that VI model is the most ideal model for promoting supply chain carbon abatement. The optimal abatement efforts, market demand, and total profits in the VI model are all the largest among the five models. Whether the supply chain leader is the manufacturer or the retailer, cost sharing contract can enhance optimal abatement efforts, market demand, and profits of both parties. In any model, the leader in Supply chain earns higher profits than the follower. When consumers’ low-carbon preference increases, the optimal abatement efforts, market demand, and profits of both parties will all increase, and the growth rate is gradually accelerating. For the manufacturer with high carbon emissions, when the carbon tax rate increases, the optimal abatement efforts first increase and then decrease. For the manufacturer with low carbon emissions, when the carbon tax rate increases, the optimal abatement efforts will also increase.
供应链碳减排是促进社会经济低碳转型、应对全球气候变化的重要途径。本文分析了不同权力结构下的供应链碳减排问题,以及消费者低碳偏好和碳税率对最优决策的影响。本文构建了五个不同的模型,即 ML-NO 模型、ML-CS 模型、RL-NO 模型、RL-CS 模型和 VI 模型。研究发现,VI 模型是促进供应链碳减排的最理想模型。在五种模型中,VI 模型的最优减排力度、市场需求和总利润都是最大的。无论供应链领导者是制造商还是零售商,成本分摊合同都能提高双方的最优减排量、市场需求和利润。在任何模型中,供应链领导者都比跟随者获得更高的利润。当消费者的低碳偏好增加时,双方的最优减排努力、市场需求和利润都会增加,且增长速度逐渐加快。对于高碳排放制造商,当碳税率增加时,最优减排努力先增加后减少。对于低碳排放的制造商,当碳税率增加时,最佳减排努力也会增加。
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引用次数: 0
Testing woodchips for their efficiency in stimulating aquatic nutrient uptake at different experimental and spatial scales 测试木屑在不同实验和空间尺度下促进水生营养吸收的效率
IF 4.6 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Pub Date : 2024-09-13 DOI: 10.3389/fenvs.2024.1419413
Elmira Akbari, Tjaša Matjašič, Anna-Lisa Dittrich, Katrin Attermeyer, Rebecca Hood-Nowotny, Gabriele Weigelhofer
IntroductionWoodchips as a source of particulate organic carbon (POC) are proposed as a nature-based solution to enhance nutrient uptake and retention in agricultural streams. However, the effective implementation of woodchips for nutrient removal in streams requires an advanced understanding of their potential and limits, considering their performance under various environmental conditions. This study tested the efficiency of woodchips on the uptake of soluble reactive phosphorus (SRP) and ammonium (N-NH4) across different experimental scales and complexity. We investigated whether the presence of woodchips can increase SRP and N-NH4 uptake in laboratory flumes under controlled conditions, outdoor flumes under semi-controlled conditions, and agricultural streams. Additionally, we examined how the effects of woodchips will change over time via a 6-week incubation in the outdoor flumes.MethodsThe woodchips were pre-colonized for four weeks to allow the growth of biofilms. We performed short-term nutrient additions without (control) and with (treatment) woodchips in all three experimental setups. Uptake parameters were determined via concentration changes over time in the laboratory flumes and concentration changes over travel distance in the outdoor flumes and the stream channels. The effects of woodchips on SRP and N-NH4 uptake rates were analyzed using an effect size model.ResultsWe found positive effects of woodchips on nutrient uptake only in the laboratory flumes but no or even negative effects in the outdoor flumes and the agricultural streams. Over the 6-week incubation in the outdoor flumes, we did not observe significant changes in the effects of woodchips on nutrient uptake.DiscussionThese findings highlight that considering experimental scales and influencing environmental conditions is crucial when testing the application of woodchips as nature-based solutions to mitigate nutrient loads in agricultural streams.
导言:木屑作为一种颗粒有机碳(POC)来源,被认为是一种基于自然的解决方案,可提高农业溪流的营养吸收和保留。然而,考虑到木屑在各种环境条件下的表现,要想在溪流中有效利用木屑去除养分,就必须对其潜力和局限性有深入的了解。本研究测试了木屑在不同实验规模和复杂程度下吸收可溶性活性磷(SRP)和铵(N-NH4)的效率。我们研究了在受控条件下的实验室水槽、半受控条件下的室外水槽和农业溪流中,木屑的存在是否能增加可溶性活性磷和 N-NH4 的吸收。此外,我们还通过在室外水槽中进行为期 6 周的培养,研究了木屑的作用会随着时间的推移而发生怎样的变化。我们在所有三个实验装置中分别添加了无木屑(对照组)和有木屑(处理组)的短期营养物。吸收参数是通过实验室水槽中浓度随时间的变化以及室外水槽和河道中浓度随距离的变化来确定的。使用效应大小模型分析了木屑对 SRP 和 N-NH4 吸收率的影响。结果 我们发现,木屑仅在实验室水槽中对营养物质的吸收有积极影响,但在室外水槽和农业溪流中没有影响,甚至有负面影响。在室外水槽中培养 6 周后,我们没有观察到木屑对养分吸收的影响发生显著变化。讨论这些发现突出表明,在测试应用木屑作为基于自然的解决方案来减轻农业溪流中的养分负荷时,考虑实验规模和影响环境条件至关重要。
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引用次数: 0
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Frontiers in Environmental Science
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