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Alpha spectrometric analysis and environmental assessment of uranium concentrations in soil and vegetation from the Tafila District, Jordan. 约旦塔菲拉地区土壤和植被中铀浓度的α光谱分析和环境评价。
IF 1.4 4区 环境科学与生态学 Q4 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2026-02-09 DOI: 10.1080/10256016.2026.2617939
Abdul-Wali Ajlouni, Kholoud Kharisat, Mahmoud Kulab, Ahmed Qwasmeh, Naima Amrani, Zinab Matar, Hana Almarri, Khaled Ali

This study aims to determine the specific activity of natural uranium isotopes, including uranium-238 (238U), uranium-234 (234U), and uranium-235 (235U), in soil and vegetable samples - specifically tomato, potato, onion, carrot, and radish - collected from the Tafila district, Jordan, and to assess the soil-to-plant transfer factors using alpha spectrometry with a passivated implanted planar silicon (PIPS) detector. A total of eight soil samples and eight corresponding vegetable samples were obtained from eight distinct locations. The results revealed considerable spatial variability in uranium activity concentrations, reflecting the influence of geological formations and environmental conditions. The average activity concentrations were 251.6 ± 14.2 Bq/kg for 238U, 10.5 ± 1.9 Bq/kg for 235U, and 248.8 ± 13.9 Bq/kg for 234U in soil samples, while vegetable samples showed lower concentrations of 3.2 ± 0.16, 0.21 ± 0.05, and 3.1 ± 0.17 Bq/kg for 238U, 235U, and 234U, respectively. The calculated transfer factors ranged from 4.4 ± 0.4 × 10-3 to 29.1 ± 1.8 × 10-3 for 238U, 6.4 ± 1.4 × 10-3 to 33.0 ± 15.7 × 10-3 for 235U, and 4.3 ± 0.4 × 10-3 to 28.7 ± 1.9 × 10-3 for 234U, which reflects notable differences in uranium uptake efficiency among the studied plant species. A strong correlation (R2 = 0.99) was observed between 238U and 234U in both soil and vegetable samples, suggesting isotopic equilibrium through natural decay. These findings provide essential baseline data for future studies on uranium mobility, bioavailability, and potential radiological risks in agricultural systems within the Tafila District.

本研究的目的是确定天然铀同位素,包括铀-238 (238U),铀-234 (234U)和铀-235 (235U),在土壤和蔬菜样品-特别是番茄,土豆,洋葱,胡萝卜和萝卜-收集从约旦塔菲拉地区,并评估土壤到植物转移因子使用α光谱与钝化植入平面硅(PIPS)探测器。在8个不同的地点共获得8个土壤样品和8个相应的蔬菜样品。结果显示,铀活度浓度具有较大的空间变异性,反映了地质构造和环境条件的影响。土壤样品中238U、235U和234U的平均活性浓度分别为251.6±14.2 Bq/kg、10.5±1.9 Bq/kg和248.8±13.9 Bq/kg,蔬菜样品中238U、235U和234U的平均活性浓度分别为3.2±0.16、0.21±0.05和3.1±0.17 Bq/kg。238U的传递系数为4.4±0.4 × 10-3 ~ 29.1±1.8 × 10-3, 235U的传递系数为6.4±1.4 × 10-3 ~ 33.0±15.7 × 10-3, 234U的传递系数为4.3±0.4 × 10-3 ~ 28.7±1.9 × 10-3,表明不同植物对铀的吸收效率存在显著差异。土壤和蔬菜样品中的238U和234U之间存在很强的相关性(R2 = 0.99),表明同位素平衡是通过自然衰变实现的。这些发现为今后研究塔菲拉地区农业系统中铀的流动性、生物利用度和潜在辐射风险提供了必要的基线数据。
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引用次数: 0
Society for Conservation Biology journal relationships and considerations. 保护生物学学会期刊《关系与考虑》。
IF 5.5 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Pub Date : 2026-02-09 DOI: 10.1111/cobi.70232
Vanessa M Adams, Warren Sander, Carolina Murcia
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引用次数: 0
Nonlinear characteristics and driving factors of vegetation-soil moisture feedback at fine scale in Northeast China. 东北精细尺度植被-土壤水分反馈的非线性特征及驱动因素
IF 3 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1007/s10661-026-15053-2
Yang Gao, Fang Huang, Ping Wang, Jiameng Gao, Pei Wu, Yue Zhang

Understanding the feedback mechanisms between vegetation and soil moisture (SM) is crucial for elucidating the coupled carbon-water processes of terrestrial ecosystems under climate change. However, existing studies are limited by coarse spatial resolution and an over-reliance on linear methods, thereby hindering the exploration of their nonlinear interactions for highly heterogeneous areas. In this study, we employed high-resolution (1 km) satellite-based datasets and a Random Forest-based nonlinear Granger causality analysis to investigate the feedback relationship between gross primary productivity (GPP) and SM at different depths (0-100 cm) in Northeast China from 2000 to 2022, along with the driving factors influencing their interactions. The results show that both GPP and SM showed a significant increasing trend during the study period, with a dominant pattern of synergistic growth (GPP + SM +), accounting for more than 94%. This proportion of synergistic increase slightly decreased with increasing soil depth. The bidirectional causal relationships were observed in 41.24% to 71.87% of the study area, with the proportion declining as soil depth increased. Among these, the influence of SM on GPP was generally stronger than the feedback from GPP to SM. The mutual feedback exhibited a lagged response of 2-3 months, showing a nonlinear pattern that first decreased and then increased with soil depth. Further analysis revealed that this feedback relationship was jointly regulated by solar radiation, precipitation, and temperature, and varied significantly across different vegetation and soil types.This study reveals the complex interaction mechanisms between vegetation and SM, providing a basis for regional agricultural optimization and ecological restoration.

了解植被与土壤水分之间的反馈机制对阐明气候变化条件下陆地生态系统碳水耦合过程具有重要意义。然而,现有的研究受限于粗糙的空间分辨率和过度依赖线性方法,从而阻碍了在高度异质性地区探索它们的非线性相互作用。利用高分辨率(1 km)卫星数据和基于随机森林(Random forest)的非线性Granger因果分析,研究了2000 - 2022年中国东北地区不同深度(0-100 cm)的总初级生产力(GPP)与SM的反馈关系,以及影响两者相互作用的驱动因素。结果表明:研究期间,GPP和SM均呈显著增长趋势,且以协同增长(GPP + SM +)为主,占比超过94%;随着土壤深度的增加,这一增效比例略有下降。41.24% ~ 71.87%的研究区存在双向因果关系,随土层深度的增加所占比例逐渐降低。其中,SM对GPP的影响普遍强于GPP对SM的反馈。相互反馈表现出2 ~ 3个月的滞后响应,呈现出随土层深度先减小后增大的非线性模式。进一步分析表明,这种反馈关系受太阳辐射、降水和温度的共同调节,且在不同植被和土壤类型之间存在显著差异。该研究揭示了植被与土壤土壤之间复杂的相互作用机制,为区域农业优化和生态恢复提供了依据。
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引用次数: 0
Corrigendum to "Application of molecular dynamics simulation for exploring the roles of plant biomolecules in promoting environmental health" [Sci. Total Environ. 869 (2023),161871]. “应用分子动力学模拟探索植物生物分子在促进环境健康中的作用”的更正[Sci.]环境科学学报,2016(5),387 - 398。
IF 8 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.scitotenv.2026.181531
Jieting Wu, Tian Gao, Lei Zhao, Sidi Lv, Jin Lv, Fang Ma
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引用次数: 0
Efficient purification of crude lead to prevent lead loss based on Pb-Cu interface properties and phase separation under supergravity field 超重力场下基于Pb-Cu界面特性和相分离的粗铅高效净化防止铅损失
IF 7.8 2区 环境科学与生态学 Q1 ENGINEERING, CHEMICAL Pub Date : 2026-02-09 DOI: 10.1016/j.psep.2026.108584
Xiang Li, Jintao Gao, Xi Lan, Anjun Shi, Zhancheng Guo
Crude lead is a hazardous material containing large amounts of heavy metals. However, due to the outdated equipment of copper removal process, resulting in a large lead loss. In this study, a new method for efficient purification of crude lead to prevent lead loss based on Pb-Cu interface properties and phase separation under supergravity field was proposed. The effect of Cu content in crude lead on the temperature range for Cu phase precipitation was investigated, revealing that as the Cu content increased from 0.5 to 4wt.%, the precipitation temperature range of the Cu phase expanded from 400-330 ℃ to 800-330 ℃. Then, the highly efficient purification of crude lead was all accomplished under 330 ℃ by supergravity separation and the Cu contents were lowered to 0.0718wt.% in the Pb liquid and the Cu phase removal rate reached over 99.9%. In order to reduce the lead loss, the Pb-Cu interface properties and separation process model were investigated, which showed that increasing the temperature in supergravity field could reduce the height of Pb liquid on the surface of the Cu phase. Finally, the Pb-Cu separation behavior was researched, revealing a quantitative relationship between lead loss and Cu content in crude lead and separation temperature. Base on the above results, corresponding copper removal process routes were designed for crude lead with different Cu contents.
粗铅是一种含有大量重金属的有害物质。但由于除铜工艺设备落后,导致铅损较大。本研究提出了一种基于超重力场作用下铅-铜界面特性和相分离的高效纯化粗铅以防止铅损失的新方法。研究了粗铅中Cu含量对Cu相析出温度范围的影响,结果表明,随着Cu含量从0.5 wt增加到4wt;%时,Cu相的析出温度范围由400 ~ 330℃扩大到800 ~ 330℃。在330℃条件下,采用超重力分离技术对粗铅进行了高效提纯,铜含量降至0.0718wt。%, Cu相去除率达99.9%以上。为了降低铅的损失,研究了Pb-Cu的界面性质和分离过程模型,结果表明,在超重力场中提高温度可以降低Cu相表面Pb液的高度。最后对铅铜分离行为进行了研究,揭示了铅损失、粗铅中Cu含量与分离温度之间的定量关系。在此基础上,对不同铜含量的粗铅设计了相应的除铜工艺路线。
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引用次数: 0
Accelerated under-deposit corrosion of X65 steel driven by a vicious microbe-deposit cycle 微生物-沉积物恶性循环导致X65钢沉积下腐蚀加速
IF 7.8 2区 环境科学与生态学 Q1 ENGINEERING, CHEMICAL Pub Date : 2026-02-09 DOI: 10.1016/j.psep.2026.108581
Yu Wang, Fei Wu, Hang Zhang, Zhenyu Ouyang, Yuhua Su, Hailiang Yin, Fanwei Meng, Qiyou Liu
The synergistic effect between microbial-induced corrosion (MIC) and under-deposit corrosion (UDC) presents a significant threat to the integrity of oil pipelines. This study investigates the corrosion behavior of X65 carbon steel under the influence of living microorganisms within pipeline deposits. The experiment was divided into three groups: unsterilized deposit group, sterilized deposit group, and control group. A combination of high-throughput sequencing, quantitative PCR, weight loss measurements, electrochemical tests, and surface characterization revealed that viable microorganisms drastically exacerbate UDC. Live microorganisms significantly enhanced the corrosion rate and maximum pitting depth by approximately 4.1 and 12.8 times, respectively, compared to the sterilized deposit group. Analysis of the microbial community revealed a successional shift, with sulfate-reducing bacteria (SRB), predominantly the genus Desulfovibrio, displacing nitrate-reducing bacteria (NRB) as the dominant population. The metabolic activity of SRB led to the formation of corrosive FeS and a porous, non-protective corrosion product film, which reduced film resistance (Rf) and accelerated metal dissolution. These findings indicate deposits in oil pipelines exacerbate localized corrosion by promoting the colonization and enrichment of corrosion-promoting microorganisms such as SRBs. Their metabolic products, combined with the resulting corrosion byproducts, further increase the overall burden of the deposits, creating a vicious cycle.
微生物腐蚀(MIC)和沉积下腐蚀(UDC)之间的协同效应对输油管道的完整性构成了重大威胁。本文研究了管道沉积物中活微生物对X65碳钢腐蚀行为的影响。试验分为3组:未灭菌菌组、灭菌菌组和对照组。高通量测序、定量PCR、失重测量、电化学测试和表面表征的结合表明,活菌急剧加剧了UDC。与灭菌菌组相比,活菌组的腐蚀速率和最大点蚀深度分别提高了约4.1倍和12.8倍。微生物群落分析显示,硫酸盐还原菌(SRB)以Desulfovibrio属为主,取代硝酸盐还原菌(NRB)成为优势菌群。SRB的代谢活性导致腐蚀性FeS和多孔的无保护性腐蚀产物膜的形成,降低了膜电阻(Rf),加速了金属的溶解。这些发现表明,石油管道中的沉积物通过促进腐蚀促进微生物(如srb)的定植和富集而加剧了局部腐蚀。它们的代谢产物,加上由此产生的腐蚀副产物,进一步增加了沉积物的总体负担,形成了一个恶性循环。
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引用次数: 0
Micro/Nanoplastics enhance multigenerational reproductive toxicity of legacy and alternative per- and polyfluoroalkyl substances in the marine rotifer Brachionus plicatilis 微/纳米塑料增强了海洋轮虫柔顺臂轮虫(Brachionus plicatilis)的遗传和替代全氟烷基和多氟烷基物质的多代生殖毒性
IF 8.9 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.envpol.2026.127791
Tao Sun, Huifeng Wu
Micro/Nanoplastics (MNPs) and per- and polyfluoroalkyl substances (PFASs) are emerging environmental contaminants of global concern. This study assessed the acute and multigenerational toxicity of perfluorooctanoic acid (PFOA) and its alternative, hexafluoropropylene oxide dimer acid (HFPO-DA, also commercially known as GenX), in the marine rotifer Brachionus plicatilis, in the presence of 80 nm and 5 μm MNPs. Acute toxicity tests demonstrated that MNPs enhanced the lethality and reproductive toxicity of both PFOA and GenX in a size-dependent manner. At the population level, MNPs exacerbated the inhibitory effects of these compounds on population growth. In multigenerational assays, fecundity was identified as the most sensitive life-history trait, exhibiting cumulative multigenerational impairments that were more pronounced in the presence of NPs. This trend aligned with the expression patterns of reproduction-related genes. Transcriptomic analysis further showed that co-exposure to NPs increased the number of differentially expressed genes, particularly those involved in metabolic and steroid biosynthesis pathways, suggesting elevated energy demands and reproductive toxicity. Collectively, these findings highlight the necessity of incorporating mixture toxicity and multigenerational effects into risk assessment frameworks to achieve more realistic chemical risk characterization and management.
微/纳米塑料(MNPs)和全氟烷基和多氟烷基物质(PFASs)是全球关注的新兴环境污染物。本研究评估了全氟辛酸(PFOA)及其替代品六氟环氧丙烷二聚酸(HFPO-DA,商业上也称为GenX)在80 nm和5 μm MNPs存在下对海洋轮虫臂尾轮虫的急性和多代毒性。急性毒性试验表明,MNPs以大小依赖的方式增强了PFOA和GenX的致死性和生殖毒性。在种群水平上,MNPs加剧了这些化合物对种群生长的抑制作用。在多代分析中,繁殖力被确定为最敏感的生活史特征,表现出累积的多代损伤,在NPs存在时更为明显。这一趋势与生殖相关基因的表达模式一致。转录组学分析进一步表明,共暴露于NPs增加了差异表达基因的数量,特别是那些参与代谢和类固醇生物合成途径的基因,这表明能量需求和生殖毒性升高。总的来说,这些发现强调了将混合毒性和多代效应纳入风险评估框架的必要性,以实现更现实的化学品风险表征和管理。
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引用次数: 0
Increases in plastic bottles washing ashore on sub-Antarctic Marion Island 在亚南极马里恩岛,被冲上岸的塑料瓶数量有所增加
IF 5.8 3区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2026-02-09 DOI: 10.1016/j.marpolbul.2026.119380
Peter G. Ryan, Azwianewi B. Makhado, Thando Cebekhulu, Robert J.M. Crawford, Bruce M. Dyer, Makhudu J. Masotla, Vonica Perold, Maelle Connan
Long-term monitoring of litter stranding on remote islands is an efficient way to track changes in the abundance and composition of floating marine litter. Over 30 years from 1993 to 2024, most beach litter at sub-Antarctic Marion Island derived from offshore sources (95%). The proportion of local, land-based litter decreased from 12% in 1993–1997 to <1% in 2019–2023, mainly due to improved solid waste management at the island's research station. Local litter had a much higher proportion of non-plastic items (68%), especially wood (32%) and metal (22%), than litter items from offshore sources, which were mostly made of plastic (94%). The abundance of fishing gear peaked in the 1990s, when there was a large fishery for Patagonian toothfish (Dissostichus eleginoides) around the island. However, even then, fishing gear comprised only 9% of offshore litter items (7% over the whole study period). Bottles (60%) and pieces of foamed polystyrene packaging (17%) accounted for most offshore litter items. The abundance of offshore litter decreased from 1993 to the early 2000s (change point 2004, 95% CI: 2000–2008), then increased until 2023, mainly due to an increase in the numbers of plastic bottles washing ashore. Our results indicate a worrying increase in general household waste at this remote island in the Southern Ocean.
对偏远岛屿上搁浅的垃圾进行长期监测是跟踪漂浮海洋垃圾丰度和组成变化的有效方法。从1993年到2024年的30年间,亚南极马里恩岛的大部分海滩垃圾来自近海(95%)。当地陆地垃圾的比例从1993-1997年的12%下降到2019-2023年的1%,这主要是由于该岛研究站的固体废物管理得到改善。本地垃圾的非塑料物品比例(68%),特别是木材(32%)和金属(22%),远高于主要由塑料制成的海上垃圾(94%)。渔具的丰富程度在20世纪90年代达到顶峰,当时岛上有大量的巴塔哥尼亚齿鱼(Dissostichus eleginoides)。然而,即便如此,渔具也只占近海垃圾的9%(整个研究期间为7%)。瓶子(60%)和泡沫聚苯乙烯包装(17%)占大多数离岸垃圾。从1993年到21世纪初,近海垃圾的丰度下降(变化点2004年,95% CI: 2000-2008年),然后增加到2023年,主要是由于冲上岸的塑料瓶数量增加。我们的研究结果表明,在这个位于南大洋的偏远岛屿上,一般生活垃圾的增加令人担忧。
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引用次数: 0
Stress-induced keystone species facilitate functional microbial community assembly to suppress root-knot nematodes for susceptible plants. 胁迫诱导的关键物种促进了功能微生物群落的聚集,从而抑制了敏感植物的根结线虫。
IF 1 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2026-02-09 DOI: 10.1093/ismejo/wrag022
Xingqun Liu, Mengyuan Song, Zhicheng Xue, Qiannan Zhang, Lihong Gao, Yongqiang Tian

Stresses (e.g., high temperature, drought, and pests) can reshape the structure of root-associated microbial communities, but how to discover functional microbial community assembly to support plant health remains a great challenge. Here we found that root-knot nematode (RKN) infection restructured the rhizosphere bacterial community in RKN-susceptible cucumber plants, regardless of the soil type. We isolated a Rhizobium pusense strain, TYQ1, which was significantly enriched following RKN infection. This strain not only directly inhibited RKNs but also caused the restructuring of the rhizobacterial community, thereby leading to the enrichment of multiple biomarker species. These enriched microorganisms, in collaboration with TYQ1, enhanced the biofilm-forming ability of the community and established a tightly interconnected metabolic interaction network, further strengthening the colonization of TYQ1 in the rhizosphere. Ultimately, the TYQ1-centered synthetic community exhibited more efficient and stable inhibition of RKNs. These findings highlight that stress-induced recruitment of keystone species can guide functional microbial community assembly to synergistically enhance plant health.

胁迫(如高温、干旱和害虫)可以重塑根相关微生物群落的结构,但如何发现支持植物健康的功能微生物群落仍然是一个巨大的挑战。本研究发现,无论土壤类型如何,根结线虫(root-knot nematode, RKN)侵染都能重构RKN易感黄瓜根际细菌群落。我们分离出一株在RKN感染后显著富集的pusense根瘤菌TYQ1。该菌株不仅直接抑制RKNs,而且引起根细菌群落的重组,从而导致多种生物标志物物种的富集。这些富集的微生物与TYQ1协同作用,增强了群落的生物膜形成能力,建立了紧密互联的代谢相互作用网络,进一步加强了TYQ1在根际的定殖。最终,以tyq1为中心的合成群落对RKNs表现出更有效和稳定的抑制作用。这些发现表明,胁迫诱导的关键物种招募可以引导功能微生物群落的聚集,协同促进植物健康。
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引用次数: 0
Degassing fluxes in a temperate hydropower reservoir predictable by deep‐water dissolved oxygen but highly sensitive to discharge variability 用深水溶解氧预测温带水电站水库脱气通量,但对流量变异性高度敏感
IF 7.8 2区 地球科学 Q1 LIMNOLOGY Pub Date : 2026-02-09 DOI: 10.1002/lol2.70108
Rachel M. Pilla, Natalie A. Griffiths, Carly Hansen, R. Trent Jett, Michael W. Jones, Nikki J. Jones, Trystan A. Bordeau
Hydropower reservoirs contribute to methane (CH 4 ) and carbon dioxide (CO 2 ) emissions, like all aquatic ecosystems. Unique to hydropower reservoirs are degassing emissions that occur when deep‐water intakes move water with high CH 4 and CO 2 concentrations through turbines, leading to the release of these gases. However, few studies from hydropower reservoirs have measured seasonal variability and drivers of degassing fluxes, especially in temperate systems. We measured monthly degassing emissions in temperate Douglas Reservoir (Tennessee, USA) from 2023 to 2024. We found that degassing fluxes were highest in the summertime, and deep‐water CH 4 and CO 2 concentrations were predictable by deep‐water dissolved oxygen (DO) concentrations. Degassing emissions accounted for 37–62% of annually estimated CH 4 emissions, outweighing ebullitive emissions during summer months. We highlight the value of using DO data to estimate deep‐water CH 4 and CO 2 concentrations and degassing fluxes at higher temporal resolution to improve annualization and extrapolation of reservoir degassing emissions at broader scales.
与所有水生生态系统一样,水电站水库也会产生甲烷(ch4)和二氧化碳(CO 2)排放。水电水库的独特之处在于脱气排放,当深水进水口将含有高浓度CH 4和CO 2的水通过涡轮机时,导致这些气体的释放。然而,很少有水电水库的研究测量了季节变化和脱气通量的驱动因素,特别是在温带系统中。从2023年到2024年,我们测量了温带道格拉斯水库(美国田纳西州)每月的脱气排放量。我们发现脱气通量在夏季最高,深水CH 4和CO 2浓度可以通过深水溶解氧(DO)浓度来预测。脱气排放占每年估计的甲烷排放量的37-62%,超过夏季的热流排放。我们强调了利用DO数据在更高时间分辨率下估计深水CH 4和CO 2浓度和脱气通量的价值,以改善更大尺度上水库脱气排放的年化和外推。
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引用次数: 0
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