Ecotoxicology最新文献

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Ecotoxicological effects of a glyphosate-based herbicide on Gryllus (Gryllus) assimilis (Orthoptera: Gryllidae) ontogeny: a study on antioxidant system, oxidative stress and cholinergic system. 草甘膦除草剂对蝼蛄(直翅目:蝼蛄科)本体发育的生态毒理学影响:关于抗氧化系统、氧化应激和胆碱能系统的研究。
IF 2.4 4区 环境科学与生态学
Ecotoxicology Pub Date : 2024-11-15 DOI: 10.1007/s10646-024-02831-2
Leanna Camila Macarini, Ana Tereza Bittencourt Guimarães, Neucir Szinwelski
{"title":"Ecotoxicological effects of a glyphosate-based herbicide on Gryllus (Gryllus) assimilis (Orthoptera: Gryllidae) ontogeny: a study on antioxidant system, oxidative stress and cholinergic system.","authors":"Leanna Camila Macarini, Ana Tereza Bittencourt Guimarães, Neucir Szinwelski","doi":"10.1007/s10646-024-02831-2","DOIUrl":"https://doi.org/10.1007/s10646-024-02831-2","url":null,"abstract":"<p><p>Brazil is an important global agricultural producer and to increase production the country has extensively used glyphosate-based herbicides (GBH), surpassing consumption and sales records. Consequently, concerns have arisen regarding the potential impact of GBH on ecosystems and non-target organisms. Thus, the effects of GBH exposure were evaluated throughout the cricket Gryllus (Gryllus) assimilis ontogeny, with five developmental stages. Each period contained 3 control and 3 treated boxes, with 15 crickets each, resulting in 90 insects at a time. The control groups received water, while the treated ones were continuously exposed to GBH (0.864 mg.GBH.L<sup>-1</sup>), with the solutions changed every 48 h. After each exposure time the crickets' group were euthanized to assess the activity of antioxidant enzymes (GST, GR, GPx, and CAT), cholinergic enzymes (ChE), and lipid peroxidation (LPO). The results revealed changes in the systems throughout different developmental phases. Specifically, CAT activity exhibited a significant increase during the nymphal phase, associated with the dismutation of hydrogen peroxide. The GBH increased GST, indicating its role in cellular detoxification, particularly during adulthood. In the senescence stage there was a considerable rise in ChE enzymes, suggesting their involvement in both, choline esters breakdown and potential pesticide detoxification. The action of these enzymes to effectively control lipid peroxidation shows the adaptability of this species to environmental contamination. These findings underscore the long-term effects of agrochemical pollution and emphasize the importance of sustainable practices, effective regulations, and alternative weed control methods.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142638440","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}
引用次数: 0
Correction to: Simulated herbicide drift alters native plant flowering phenology. 更正:模拟除草剂漂移改变了本地植物的开花物候。
IF 2.4 4区 环境科学与生态学
Ecotoxicology Pub Date : 2024-11-09 DOI: 10.1007/s10646-024-02828-x
David Olszyk, Thomas Pfleeger, Tamotsu Shiroyama, Matthew Blakeley-Smith, E Henry Lee, M S Nash, Milton Plocher
{"title":"Correction to: Simulated herbicide drift alters native plant flowering phenology.","authors":"David Olszyk, Thomas Pfleeger, Tamotsu Shiroyama, Matthew Blakeley-Smith, E Henry Lee, M S Nash, Milton Plocher","doi":"10.1007/s10646-024-02828-x","DOIUrl":"https://doi.org/10.1007/s10646-024-02828-x","url":null,"abstract":"","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142616663","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}
引用次数: 0
Synergistic effects of elevated temperature with pesticides on reproduction, development and survival of dung beetles. 温度升高与杀虫剂对蜣螂繁殖、发育和存活的协同效应。
IF 2.4 4区 环境科学与生态学
Ecotoxicology Pub Date : 2024-11-09 DOI: 10.1007/s10646-024-02825-0
Andrea Esquivel-Román, Fernanda Baena-Díaz, Carlos Bustos-Segura, Ornela De Gasperin, Daniel González-Tokman
{"title":"Synergistic effects of elevated temperature with pesticides on reproduction, development and survival of dung beetles.","authors":"Andrea Esquivel-Román, Fernanda Baena-Díaz, Carlos Bustos-Segura, Ornela De Gasperin, Daniel González-Tokman","doi":"10.1007/s10646-024-02825-0","DOIUrl":"https://doi.org/10.1007/s10646-024-02825-0","url":null,"abstract":"<p><p>In times of global change, high temperatures can increase the negative effects of pesticides and other stressors. The goal of this study was to evaluate, under controlled laboratory conditions, the effect of a moderate increase in temperature in combination with ivermectin (an antiparasitic medication used in cattle that is excreted in dung), an herbicide, and parasitic pressure, on the reproductive success, development time and adult survival of dung beetles Euoniticellus intermedius. Whereas high temperature increased the number and proportion of emerged offspring, it had synergistic negative effects in combination with the ivermectin, herbicide and parasite treatments. Moreover, high temperature in combination with ivermectin and with parasitism caused a synergistic increase of adult offspring mortality and, in combination with the herbicide, it synergistically accelerated development. These results indicate that high temperatures can enhance the negative effects of other stressors and act synergistically with them, harming dung beetles, a group with high ecological and economic value in natural and productive ecosystems. Although adult sex ratio was not affected by experimental treatments, contrasting responses were found between males and females, supporting the idea that both sexes use different physiological mechanisms to cope with the same environmental challenges. The effects that combined stressors have on insects deepen our understanding of why we are losing beneficial species and their functions in times of drastic environmental changes.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142616664","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}
引用次数: 0
Mercury accumulation and biomarkers of exposure in two popular recreational fishes in Hawaiian waters. 夏威夷水域两种流行的休闲鱼类的汞积累和暴露生物标志物。
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-10-01 Epub Date: 2023-07-25 DOI: 10.1007/s10646-023-02684-1
Stephanie Shaw Holbert, Colleen E Bryan, Keith E Korsmeyer, Brenda A Jensen
{"title":"Mercury accumulation and biomarkers of exposure in two popular recreational fishes in Hawaiian waters.","authors":"Stephanie Shaw Holbert,&nbsp;Colleen E Bryan,&nbsp;Keith E Korsmeyer,&nbsp;Brenda A Jensen","doi":"10.1007/s10646-023-02684-1","DOIUrl":"10.1007/s10646-023-02684-1","url":null,"abstract":"<p><p>Mercury (Hg) exposure has not been examined in many recreational nearshore fish species that are commonly consumed around the Hawaiian Islands. Specific gene transcripts, such as metallothionein (MET) and thioredoxin reductase (TrxR), can be used to examine Hg exposure responses in aquatic organisms. This study measured total mercury (THg) in four species from two groups of Hawaiian nearshore fishes: giant trevally (Caranx ignobilis, n = 13), bluefin trevally (C. melampygus, n = 4), sharp jaw bonefish (Albula virgata, n = 2), and round jaw bonefish (A. glossodonta, n = 19). Total Hg accumulation and abundance profiles of MET and TrxR were evaluated for muscle, liver, and kidney tissues. Total Hg in round jaw bonefish and giant trevally tissues accumulated with length and calculated age. In round jaw bonefish tissues, mean THg was greater in kidney (1156 ng/g wet mass (wm)) than liver (339 ng/g wm) and muscle (330 ng/g wm). Giant trevally muscle (187 ng/g wm) and liver (277 ng/g wm) mean THg did not differ significantly. Fish species in this study were compared to commercial and local fish species with state and federal muscle tissue consumption advisories based on THg benchmarks developed by the U.S. Food and Drug Administration (FDA) and Environmental Protection Agency (EPA). Both bonefishes had mean muscle THg that exceeded benchmarks suggesting consumption advisories should be considered. MET transcript in round jaw bonefish kidney tissue and kidney THg exhibited a marginally significant positive correlation, while TrxR transcript in liver tissue negatively correlated with increasing liver THg. These results contribute to our understanding of Hg exposure associated health effects in fish.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"1010-1023"},"PeriodicalIF":2.7,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10622350/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9871331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mercury and methylmercury concentration in the feathers of two species of Kingfishers Megaceryle torquata and Chloroceryle amazona in the Upper Paraguay Basin and Amazon Basin. 上巴拉圭盆地和亚马逊盆地两种翠鸟Megaceryle torquata和Chlorocceryle amazona羽毛中的汞和甲基汞浓度。
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-10-01 Epub Date: 2023-06-22 DOI: 10.1007/s10646-023-02680-5
Thaysa Costa Hurtado, Gerlane de Medeiros Costa, Giovani Spínola de Carvalho, Bruno Ramos Brum, Áurea Regina Alves Ignácio
{"title":"Mercury and methylmercury concentration in the feathers of two species of Kingfishers Megaceryle torquata and Chloroceryle amazona in the Upper Paraguay Basin and Amazon Basin.","authors":"Thaysa Costa Hurtado,&nbsp;Gerlane de Medeiros Costa,&nbsp;Giovani Spínola de Carvalho,&nbsp;Bruno Ramos Brum,&nbsp;Áurea Regina Alves Ignácio","doi":"10.1007/s10646-023-02680-5","DOIUrl":"10.1007/s10646-023-02680-5","url":null,"abstract":"<p><p>Mercury (Hg) contamination remains a significant environmental concern. In aquatic ecosystems, Hg can undergo methylation, forming its organic form, methylmercury (MeHg), which bioaccumulates and biomagnifies in the food chain, ultimately reaching the top predators, including waterfowl. The objective of this study was to investigate the distribution and levels of Hg in wing feathers, with a specific focus on evaluating heterogeneity in the primary feathers of two kingfisher species (Megaceryle torquata and Chloroceryle amazona). The concentrations of total Hg (THg) in the primary feathers of C. amazona individuals from the Juruena, Teles Pires, and Paraguay rivers were 4.724 ± 1.600, 4.003 ± 1.532, and 2.800 ± 1.475 µg/kg, respectively. The THg concentrations in the secondary feathers were 4.624 ± 1.718, 3.531 ± 1.361, and 2.779 ± 1.699 µg/kg, respectively. For M. torquata, the THg concentrations in the primary feathers from the Juruena, Teles Pires, and Paraguay rivers were 7.937 ± 3.830, 6.081 ± 2.598, and 4.697 ± 2.585 µg/kg, respectively. The THg concentrations in the secondary feathers were 7.891 ± 3.869, 5.124 ± 2.420, and 4.201 ± 2.176 µg/kg, respectively. The percentage of MeHg in the samples increased during THg recovery, with an average of 95% in primary feathers and 80% in secondary feathers. It is crucial to comprehend the current Hg concentrations in Neotropical birds to mitigate potential toxic effects on these species. Exposure to Hg can lead to reduced reproductive rates and behavioral changes, such as motor incoordination and impaired flight ability, ultimately resulting in population decline among bird populations.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"1084-1095"},"PeriodicalIF":2.7,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10050803","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}
引用次数: 0
Are tunas relevant bioindicators of mercury concentrations in the global ocean? 金枪鱼是否与全球海洋中汞浓度的生物指标相关?
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-10-01 Epub Date: 2023-06-16 DOI: 10.1007/s10646-023-02679-y
Anaïs Médieu, Anne Lorrain, David Point
{"title":"Are tunas relevant bioindicators of mercury concentrations in the global ocean?","authors":"Anaïs Médieu,&nbsp;Anne Lorrain,&nbsp;David Point","doi":"10.1007/s10646-023-02679-y","DOIUrl":"10.1007/s10646-023-02679-y","url":null,"abstract":"<p><p>Humans are exposed to toxic methylmercury mainly by consuming marine fish. The Minamata Convention aims at reducing anthropogenic mercury releases to protect human and ecosystem health, employing monitoring programs to meet its objectives. Tunas are suspected to be sentinels of mercury exposure in the ocean, though not evidenced yet. Here, we conducted a literature review of mercury concentrations in tropical tunas (bigeye, yellowfin, and skipjack) and albacore, the four most exploited tunas worldwide. Strong spatial patterns of tuna mercury concentrations were shown, mainly explained by fish size, and methylmercury bioavailability in marine food web, suggesting that tunas reflect spatial trends of mercury exposure in their ecosystem. The few mercury long-term trends in tunas were contrasted and sometimes disconnected to estimated regional changes in atmospheric emissions and deposition, highlighting potential confounding effects of legacy mercury, and complex reactions governing the fate of mercury in the ocean. Inter-species differences of tuna mercury concentrations associated with their distinct ecology suggest that tropical tunas and albacore could be used complementarily to assess the vertical and horizontal variability of methylmercury in the ocean. Overall, this review elevates tunas as relevant bioindicators for the Minamata Convention, and calls for large-scale and continuous mercury measurements within the international community. We provide guidelines for tuna sample collection, preparation, analyses and data standardization with recommended transdisciplinary approaches to explore tuna mercury content in parallel with observation abiotic data, and biogeochemical model outputs. Such global and transdisciplinary biomonitoring is essential to explore the complex mechanisms of the marine methylmercury cycle.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"994-1009"},"PeriodicalIF":2.7,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9635003","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}
引用次数: 1
Bixafen causes hepatotoxicity and pancreas toxicity in zebrafish (Danio rerio). 比沙芬可引起斑马鱼(Danio rerio)的肝毒性和胰腺毒性。
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-09-01 Epub Date: 2023-08-19 DOI: 10.1007/s10646-023-02687-y
Yini Wang, Huihan Peng, Hailing Yu
{"title":"Bixafen causes hepatotoxicity and pancreas toxicity in zebrafish (Danio rerio).","authors":"Yini Wang,&nbsp;Huihan Peng,&nbsp;Hailing Yu","doi":"10.1007/s10646-023-02687-y","DOIUrl":"10.1007/s10646-023-02687-y","url":null,"abstract":"<p><p>Bixafen (BIX), a widely used succinate dehydrogenase inhibitor (SDHI) in agricultural disease control, has garnered significant attention due to its known hazardous effects on aquatic organisms. In this study, we exposed zebrafish embryos to 0.1, 0.2, and 0.3 μM BIX, to explore the impact of BIX on liver and pancreas. The results showed that BIX caused deformities and dysfunction in zebrafish embryos, including spinal curvature, pericardial edema, heart rate decrease, and hatching delay. Moreover, BIX significantly affected the development of the liver and pancreas in zebrafish and downregulated zebrafish fabp10a gene expression. Overall, this study presents strong evidence for BIX's potential toxicity to zebrafish liver and pancreas. The results may provide new insights into the evaluation of BIX'S impact on aquatic organisms.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"837-844"},"PeriodicalIF":2.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10024612","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}
引用次数: 0
Effects of diclofenac, sulfamethoxazole, and wastewater from constructed wetlands on Eisenia fetida: impacts on mortality, fertility, and oxidative stress. 双氯芬酸、磺胺甲恶唑和人工湿地废水对赤子爱胜酵母的影响:对死亡率、生育率和氧化应激的影响。
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-09-01 Epub Date: 2023-08-26 DOI: 10.1007/s10646-023-02690-3
Justyna Drzymała, Joanna Kalka
{"title":"Effects of diclofenac, sulfamethoxazole, and wastewater from constructed wetlands on Eisenia fetida: impacts on mortality, fertility, and oxidative stress.","authors":"Justyna Drzymała,&nbsp;Joanna Kalka","doi":"10.1007/s10646-023-02690-3","DOIUrl":"10.1007/s10646-023-02690-3","url":null,"abstract":"<p><p>Soil contamination with micropollutants is an important global problem and the impact of these pollutants on living organisms cannot be underestimated. The effects of diclofenac (DCF) and sulfamethoxazole (SMX), their mixture (MIX), and wastewater containing these drugs on the mortality and reproduction of Eisenia fetida were investigated. The impact on the activities of antioxidant enzymes in earthworm cells was also assessed. Furthermore, the influence of the following parameters of the vertical flow constructed wetlands on wastewater toxicity was investigated: the dosing system, the presence of pharmaceuticals and the plants Miscanthus giganteus. The compounds and their mixture significantly affected the reproduction and mortality of earthworms. The calculated values of LC<sub>50,28 days</sub> values were 3.4 ± 0.3 mg kg<sup>-1</sup> for DCF, 1.6 ± 0.3 mg kg<sup>-1</sup> for SMX, and 0.9 ± 0.1 mg kg<sup>-1</sup> for MIX. The EC<sub>50</sub> (reproduction assay) for DCF was 1.2 ± 0.2 mg kg<sup>-1</sup>, whereas for SMX, it was 0.4 ± 0.1 mg kg<sup>-1</sup>, and for MIX, it was 0.3 ± 0.1 mg kg<sup>-1</sup>, respectively. The mixture toxicity index (MTI) was calculated to determine drug interactions. For both E. fetida mortality (MTI = 3.29) and reproduction (MTI = 3.41), the index was greater than 1, suggesting a synergistic effect of the mixture. We also observed a negative effect of wastewater (raw and treated) on mortality (32% for raw and 8% for treated wastewater) and fertility (66% and 39%, respectively) of E. fetida. It is extremely important to analyze the harmfulness of microcontaminants to organisms inhabiting natural environments, especially in the case of wastewater for irrigation of agricultural fields.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"858-873"},"PeriodicalIF":2.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10533613/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10073468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variation in habitat use and its consequences for mercury exposure in two Eastern Ontario bat species, Myotis lucifugus and Eptesicus fuscus. 安大略省东部的两种蝙蝠,Myotis lucifugus和Eptesicus fuscus,栖息地使用的变化及其对汞暴露的影响。
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-09-01 Epub Date: 2023-08-23 DOI: 10.1007/s10646-023-02693-0
Bailey Bedard, Brian Hickey, John Chételat, Jan A Mennigen
{"title":"Variation in habitat use and its consequences for mercury exposure in two Eastern Ontario bat species, Myotis lucifugus and Eptesicus fuscus.","authors":"Bailey Bedard,&nbsp;Brian Hickey,&nbsp;John Chételat,&nbsp;Jan A Mennigen","doi":"10.1007/s10646-023-02693-0","DOIUrl":"10.1007/s10646-023-02693-0","url":null,"abstract":"<p><p>The St. Lawrence River in Eastern Ontario, Canada, has been a designated an area of concern due to past industrial contamination of sediment in some areas and transport of mercury from tributaries. Previous research using bats as sentinel species identified elevated concentrations of total mercury (THg) in fur of local bats and species-specific variation between little brown bats (Myotis lucifugus) and big brown bats (Eptesicus fuscus). Here, we investigated the mercury exposure pathways for these two species by testing the hypothesis that diet variation, particularly the reliance on aquatic over terrestrial insects, is a determinant of local bat mercury concentrations. We analyzed THg concentration and stable isotope ratios of δ<sup>15</sup>N and δ<sup>13</sup>C in fur of little and big brown bats, and in aquatic and terrestrial insects. Big brown bats, especially males, accumulated significantly higher THg concentrations in their fur compared to little brown bats. However, this difference was not related to diet because big brown bats consumed terrestrial insects, which were lower in mercury than aquatic insects, the primary prey for little brown bats. We also evaluated whether fur THg concentrations translate into molecular changes in tissues linked to (methyl)mercury toxicity by quantifying tissue changes in global DNA methylation and mitochondrial DNA abundance. No significant changes in DNA molecular markers were observed in relation to fur THg concentration, suggesting mercury exposure to local bats did not impact molecular level changes at the DNA level. Higher mercury in bats was not associated with local aquatic contamination or genotoxicity in this study area.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"845-857"},"PeriodicalIF":2.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10049795","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}
引用次数: 0
Neurotoxicological mechanisms of carbon quantum dots in a new animal model Dugesia japonica. 碳量子点在一种新型动物模型中的神经毒理学机制。
IF 2.7 4区 环境科学与生态学
Ecotoxicology Pub Date : 2023-08-01 DOI: 10.1007/s10646-023-02671-6
Jing Kang, Qing Ai, Ang Zhao, Haijiao Wang, Xiangpeng Zhang, Yanli Liu, Lingke Zhang, Yuqing Liu
{"title":"Neurotoxicological mechanisms of carbon quantum dots in a new animal model Dugesia japonica.","authors":"Jing Kang,&nbsp;Qing Ai,&nbsp;Ang Zhao,&nbsp;Haijiao Wang,&nbsp;Xiangpeng Zhang,&nbsp;Yanli Liu,&nbsp;Lingke Zhang,&nbsp;Yuqing Liu","doi":"10.1007/s10646-023-02671-6","DOIUrl":"https://doi.org/10.1007/s10646-023-02671-6","url":null,"abstract":"<p><p>As luminescent nanomaterials, the carbon quantum dots (CQDs) research focused on emerging applications since their discovery. However, their toxicological effects on the natural environment are still unclear. The freshwater planarian Dugesia japonica is distributed extensively in aquatic ecosystems and can regenerate a new brain in 5 days after amputation. Therefore it can be used as a new model organism in the field of neuroregeneration toxicology. In our study, D. japonica was cut and incubated in medium treated with CQDs. The results showed that the injured planarian lost the neuronal ability of brain regeneration after treatment with CQDs. Its Hh signalling system was interfered with at Day 5, and all cultured pieces died on or before Day 10 due to head lysis. Our work reveals that CQDs might affect the nerve regeneration of freshwater planarians via the Hh signalling pathway. The results of this study improve our understanding of CQD neuronal development toxicology and can aid in the development of warning systems for aquatic ecosystem damage.</p>","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":"32 6","pages":"711-719"},"PeriodicalIF":2.7,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10063495","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}
引用次数: 0
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