Isotopes in Environmental and Health Studies最新文献

{"title":"Isotopic evidence of arthropod-based diet shaping feather ornamentation in saffron finches (<i>Sicalis flaveola</i>, Linnaeus 1766).","authors":"Emanuel M L Silva, Fabio J V Costa, Felipe M Gawryszewski, Gabriela B Nardoto","doi":"10.1080/10256016.2026.2665403","DOIUrl":"https://doi.org/10.1080/10256016.2026.2665403","url":null,"abstract":"<p><p>Dietary variation at the individual level plays a fundamental role in carotenoid-based ornamental plumage coloration, which often influences sexual and social signaling. This study investigated how dietary differences shape the coloration of two ornamental feather types (breast and forehead) in males of the saffron finch. This small neotropical bird is considered granivorous, although it frequently incorporates arthropods into its diet. We used reflectance-based color measurements and carbon and nitrogen stable isotopes (<i>δ</i>¹³C, <i>δ</i>¹⁵N) to infer dietary patterns and their association with color variation. A total of 29 males were sampled across seven field campaigns conducted between January 2017 and March 2018 in a farm located in the Central Brazilian savannas. <i>δ</i>¹³C values showed no association with breast or forehead coloration, indicating that variation in carbon sources was not a major driver of color expression. In contrast, <i>δ</i>¹⁵N values were significantly associated with hue variation in both feather types. Higher <i>δ</i>¹⁵N values corresponded to a yellower-shifted hue in breast feathers and red-shifted hues in forehead feathers. Taken together, these findings suggest that saffron finches may selectively forage on high-trophic level prey that are relatively rich in carotenoids and associated with improved nutritional conditions. This dietary variation may be linked to differences in carotenoid processing and allocation across feather patches, contributing to different color phenotypes. In addition, such diets are associated with the production of high-quality feathers and promote more elaborate ornamental coloration. Although <i>δ</i>¹⁵N values may also be influenced by baseline variation in nitrogen sources, the observed patterns are consistent with trophic differences and highlight the role of diet in shaping plumage coloration. Our results highlight the importance of individual dietary strategies in shaping carotenoid-based color phenotypes through both direct (carotenoid acquisition) and indirect (nutritional condition) pathways, with distinct effects across different ornamental feather regions.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-13"},"PeriodicalIF":1.4,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147837871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Natural radioactivity in soil and concomitant hazards in the BSCIC Industrial Area, Jhenaidah, Bangladesh: a pioneering study.","authors":"M M Mahfuz Siraz, Md Sozol Hossain, Afroza Shelley, Mohammad Shafiqul Alam, Araf Mahmud, Md Bazlar Rashid, Mayeen Uddin Khandaker, Hamid Osman, Selina Yeasmin","doi":"10.1080/10256016.2025.2556940","DOIUrl":"10.1080/10256016.2025.2556940","url":null,"abstract":"<p><p>Soil serves as both a repository and a pathway for natural radioactivity, influencing human exposure through the transfer of radionuclides into the food-chain and atmosphere. Industrial activities can further disrupt this distribution by introducing contaminants, potentially leading to environmental accumulation. This pioneering study investigates the activity concentrations of naturally occurring radioactive materials (NORMs) and assesses radiological hazards in soil from the Bangladesh Small and Cottage Industries Corporation (BSCIC) Industrial Area in Jhenaidah, Bangladesh. Thirty soil samples were systematically collected at radial distances of 100, 400 and 800 m from the industrial center. The range of activity concentrations of ²²⁶Ra, ²³²Th, and ⁴⁰K were found to be 20 ± 2 to 35 ± 3, 23 ± 2 to 55 ± 4, and 420 ± 32 to 610 ± 51 Bq kg^-1, respectively, while the activity concentrations of certain ²²⁶Ra, most ²³²Th, and all ⁴⁰K exceed the global average values of 30, 35, and 400 Bq kg^-1, respectively. Notably, ⁴⁰K levels remain relatively consistent across the study area, whereas ²²⁶Ra and ²³²Th concentrations tend to decrease with increasing distance from the industrial site. The elevated radionuclide levels may be attributed to local geological formations rich in heavy minerals, industrial processes that redistribute these elements, and anthropogenic activities such as waste disposal and construction. Additionally, Sample 16 (23.5422849°N, 89.1951063°E) exhibited trace amount of ¹³⁷Cs (1.84 ± 0.26 Bq kg^-1), indicating possible contamination from past nuclear fallout events such as Chernobyl or Fukushima. While radium equivalent activity and hazard indices remain within safety limits, certain outdoor absorbed dose rates, external effective doses, gamma representative level indices, and excess lifetime cancer risks exceed recommended thresholds, raising concerns about potential long-term health risks. These findings underscore the need for cautious land use planning, particularly for agricultural and construction purposes. Furthermore, this study provides essential baseline data to monitor radioactivity in industrial zones before the commissioning of the Rooppur Nuclear Power Plant.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"174-196"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145238648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Assessment of health risks due to natural radioactivity of some building materials in Algeria.","authors":"Abdelfettah Belafrites","doi":"10.1080/10256016.2025.2557497","DOIUrl":"10.1080/10256016.2025.2557497","url":null,"abstract":"<p><p>This study aims to evaluate the radiation doses from building materials, including sand, cement, brick, faience, plaster and marble, collected from different sites in eastern Algeria. The specific activities of natural radionuclides, mainly represented by the natural radioactive series ²³⁸U, ²³²Th and primordial ⁴⁰K, were determined using a gamma spectrometry system equipped with a high purity germanium (HPGe) detector. Radiological hazard parameters (Ra_eq, H_ex, H_in, I_γ and I_α) associated with these activities were calculated to determine the suitability of the construction materials. To assess their radiological risks to human health, an analysis of absorbed dose rate (D), annual effective dose (AED) and excess lifetime cancer risk (ELCR) was performed and the results examined and compared with those reported elsewhere. The findings obtained for these samples are within the limits of internationally recommended values.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"197-209"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145149000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Radioactivity measurements of chemical and organic fertilizers applied to farms in the Kurdistan Region, Iraq.","authors":"Hallo M Abdullah, Ali H Ahmed, Ahmed I Samad, Mohammed I Hussein","doi":"10.1080/10256016.2025.2556934","DOIUrl":"10.1080/10256016.2025.2556934","url":null,"abstract":"<p><p>The use of chemical and organic fertilizers in the farms of the Kurdistan region has increased because of land reclamation and agricultural activities. The ores used in some chemical fertilizers contain various amounts of radioisotopes such as ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs. For this reason, chemical fertilizers are considered one of many sources of radionuclides and radioactivity in the environment. In this work, the specific activities of ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs in samples of twenty common chemical fertilizers and of five organic fertilizers were estimated by using a gamma ray spectrometer based on the NaI(Tl) detector<i>.</i> The total average activity concentrations of ²³⁸U, ²³²Th, ⁴⁰K and ¹³⁷Cs were 8.81, 8.31, 2360.36 and 0.07 Bq kg^-1, respectively. In general, chemical fertilizers revealed higher radioactivity than organic fertilizers, and the agricultural application of these fertilizers may cause health risks unless their usage has been controlled scientifically.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"162-173"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145175397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Health hazards associated with radon present in soil of Nizampur, Khyber Pakhtunkhwa, Pakistan.","authors":"Jehangir Ijaz, Yuping Su, Nisar Ahmad, Muhammad Bakhsh","doi":"10.1080/10256016.2025.2558223","DOIUrl":"10.1080/10256016.2025.2558223","url":null,"abstract":"<p><p>Over 50% of the annual dosage is caused by inhaling radon, thoron, and their decay products. Additionally, indoor concentrations of radon and thoron's decay agents are primarily responsible for the inhalation doses linked to these gases. This study aimed to measure the activity of radon in soil of Nizampur, and associated cancer risk using an RAD7 detector. The range and average values of radon in soil were found to be 994-14,700 Bq m^-3 and 6184 Bq m^-3, respectively. Radon exhalation rate ranged from 220 to 3442 Bq m^-2 h^-1 with an average value of 1447 Bq m^-2 h^-1. The statistical analysis of radon in the soil shows that due to possible localized sources or measurement inconsistency, ambient radon data often exhibits mild skewness or kurtosis, which is shown by minor deviations at the extremes (tails). Based on the values of radon exhalation rate which were found higher than the world permissible value of 57.60 Bq m^-2 h^-1, it is concluded that the soil of the study area may pose health hazards if it is used for construction or other purposes.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"210-219"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145137716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Off-line measurement of carbon stable isotopes of trisaccharides, disaccharides, glucose and fructose in honey samples.","authors":"Matheus C Carvalho","doi":"10.1080/10256016.2025.2559196","DOIUrl":"10.1080/10256016.2025.2559196","url":null,"abstract":"<p><p>Online liquid chromatography (LC) followed by isotope ratio mass spectrometry (IRMS) is a trusted technique to detect honey adulteration based on the stable carbon isotope composition (δ¹³C) of trisaccharides, disaccharides, glucose and fructose. However, LC-IRMS demands specialised analytical setups not commonly found in most isotope labs. Here we investigate the use of off-line LC followed by elemental analysis (EA)-IRMS as an alternative employing more commonly available instruments. Precision and accuracy were excellent for fructose and glucose (error < 0.1 mUr), but less so for disaccharides and trisaccharides, which are similar results to online LC-IRMS. Therefore, offline LC-EA-IRMS can be a viable alternative for the analysis of honey purity employing stable carbon isotopes.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"134-138"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145130816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Stable isotopes as a tool towards a better understanding of the biogeochemical traits of invasive <i>Fallopia japonica</i>.","authors":"Sierra K Grange, Johanna P Girardi, Clara Mendoza-Lera, Jens Dyckmans, Katherine Muñoz, Melanie Brunn, Hermann F Jungkunst","doi":"10.1080/10256016.2025.2567068","DOIUrl":"10.1080/10256016.2025.2567068","url":null,"abstract":"<p><p>Invasive plants pose a significant threat to ecosystems by disrupting the ecological balance, which includes the alteration of biogeochemical processes. Among the most aggressive invaders is <i>Fallopia japonica</i>, a species that thrives in riparian zones - critical interfaces between aquatic and terrestrial environments - where it significantly impacts biodiversity and ecosystem functions. Despite its success as an invader, the mechanisms that drive both the impact and success of <i>F. japonica</i> upon ecosystem processes remain poorly understood. Prior studies have suggested that <i>F. japonica</i> may exhibit traits such as a unique preference for ammonium over nitrate, potentially altering nitrogen availability for native plants like <i>Urtica dioica</i>. Additionally, it has been proposed that the species leverages phenolic compounds to influence soil biogeochemistry and nitrogen cycling. However, these processes lack comprehensive investigation. Using stable isotope labelling (¹⁵N and ¹³C), we found that, contrary to prior assumptions, <i>F. japonica</i> showed an overall lower uptake of both ammonium and nitrate relative to the native competitor, <i>U. dioica</i>. Although we expected a preference for ammonium, <i>F. japonica</i> instead exhibited a slight preference for nitrate. In addition, <i>F. japonica</i> demonstrated higher nitrogen-use efficiency and allocated more freshly assimilated carbon and nitrogen to root growth than <i>U. dioica</i>. These findings suggest that traits such as efficient nitrogen use and strategic root allocation may contribute to <i>F. japonica</i>'s ability to establish itself in nitrogen-variable environments like riparian zones. By prioritising belowground biomass during early development, <i>F. japonica</i> may gain a competitive advantage that enables it to disrupt native plant communities and alter ecosystem dynamics. This study underscores the value of stable isotopes in understanding plant-soil interactions and informs strategies for managing invasive species in sensitive ecosystems.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"119-133"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Assessment of natural radioactivity in soil samples collected around the thermal power plant area of Cuddalore district, Tamil Nadu.","authors":"G Poongodi, A Chandrasekaran, D Praveen Sam","doi":"10.1080/10256016.2025.2556929","DOIUrl":"10.1080/10256016.2025.2556929","url":null,"abstract":"<p><p>This study investigates the natural radioactivity levels of ²³⁸U, ²³²Th, and ⁴⁰K in soil samples using a NaI (Tl) gamma-ray spectrometer. The primary objective was to determine the activity levels of radionuclides such as ²³⁸U, ²³²Th, and ⁴⁰K in soil samples and to assess the related radiological risk. Based on these measurements, several radiological parameters, including radium equivalent activity (Ra_eq), outdoor absorbed dose rate (ADR_out), annual effective dose equivalent (AEDE_out), excess lifetime cancer risk (ELCR_out), external hazard indices (H_ex), and annual gonadal dose equivalent (AGDE), were calculated. Additionally, the effective radiation dose to specific body organs (D_organ) was estimated to evaluate the potential biological impact of external gamma radiation exposure. The results indicate that the activity level of ²³⁸U slightly exceeds the world recommended limit of (35 Bq kg^-1), while the calculated radiological variables such as ADR_out (101 ± 13 nGy h^-1), AEDE_out (0.12 ± 0.02 mSv y^-1), ELCR_out (0.43 ± 0.08), and AGDE (366 ± 48 µSv y^-1) were slightly higher than the internationally recommended safety limits. Multivariate statistical analysis was performed, helping to identify potential sources and interrelationships among the measured radionuclides and radiological variables.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"139-161"},"PeriodicalIF":1.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145244584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Does mill-grinding affect stable C and N isotopic analysis of animal tissues?","authors":"Paride Balzani, Travis Meador","doi":"10.1080/10256016.2026.2662051","DOIUrl":"https://doi.org/10.1080/10256016.2026.2662051","url":null,"abstract":"<p><p>Mechanical grinding is increasingly used in samples preparation for stable isotope analysis. However, plastic abrasion could contaminate samples and bias the isotopic analysis. Previous studies on plant material and large quantity of marine animal samples showed that this bias is limited. However, there is no evaluation of this potential contamination on smaller animal samples. We evaluate potential plastic contamination by analysing the C and N elemental composition and stable isotope values of ∼50 mg (dry weight) of samples of a freshwater crustacean hand-ground versus mill-ground for durations of 1, 2 and 5 min. We found no differences in %N among treatment groups, but an increase in the %C with ball milling time, with significant differences between samples hand ground and mill-ground for 2 min, hand ground and mill-ground for 5 min, and mill-ground for 1 min and mill-ground for 5 min. No significant differences in neither the <i>δ</i>¹⁵N nor <i>δ</i>¹³C were found among the four grinding methods. We estimated plastic abrasion to be 1.65 mg. Our results show that the use of ball milling for homogenising samples for C and N stable isotope analysis does not affect animal muscle samples with a commonly used amount of material (∼50 mg). Finally, we provided a graphical recommendation on the minimum amount of sample to be ground by milling without incurring in plastic contamination bias.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-9"},"PeriodicalIF":1.4,"publicationDate":"2026-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147771589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Development of a continuous-flow GC-IRMS method for the simultaneous determination of CO₂ concentration and isotopic composition (<i>δ</i>¹³C_CO2) in volcanic and geothermal gases.","authors":"Mariagrazia Misseri, Ygor Oliveri","doi":"10.1080/10256016.2026.2661793","DOIUrl":"https://doi.org/10.1080/10256016.2026.2661793","url":null,"abstract":"<p><p>This paper describes a simple method for the simultaneous determination of the isotopic composition (<i>δ</i>¹³C_CO2) and concentration of CO₂ in volcanic and geothermal gases using a continuous flow mass spectrometry system (CF-IRMS). The instrumental configuration includes a Thermo Fisher Scientific Delta Q mass spectrometer, connected through a Conflo IV to a Thermo Trace 1610 gas chromatograph (GC) physically connected at the module Isolink II. The performance of the developed GC-IRMS method was evaluated through a comprehensive series of tests assessing the precision and accuracy of the <i>δ</i>¹³C values and the simultaneous determination of CO₂ concentrations. Specifically, we evaluated instrumental precision and isotopic data reproducibility (<i>δ</i>¹³C_CO2) under various gas chromatographic operating conditions (split ratio) using gas mixture and certified isotopic standards; concentration calibration curves were specifically developed at different split ratios (3, 20, 35, and 45) using certified gas mixtures to quantitative CO₂ determination with a wide concentration range (from 0.06-100 % vol.). The concentration data were compared with those obtained with traditional analytical techniques (GC and IR). Subsequently, the entire system performance, for both isotopic composition and CO₂ concentration, was validated on volcanic and geothermal gases. These samples, including fumaroles, bubbling pools, and soil gas emissions, were selected to test the simultaneous determination capability under real-world conditions. The results confirm that the achieved operating configuration ensures optimal performance for the simultaneous determination of <i>δ</i>¹³C_CO2 and CO₂ concentrations, guaranteeing a precision of ± 0.08 ‰ and an accuracy within ± 0.1 ‰ for isotopic data and a quantitative accuracy typically within ± 5 % for concentration data.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-12"},"PeriodicalIF":1.4,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147771651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}