Ecotoxicology最新文献_第4页

Sulfate sensitivity of early life stages of freshwater mussels Unio crassus and Margaritifera margaritifera. 淡水贻贝 Unio crassus 和 Margaritifera 早期生命阶段对硫酸盐的敏感性。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-11-01 Epub Date: 2024-08-08 DOI: 10.1007/s10646-024-02794-4

Xiaoxuan Hu, Mikko Mäkinen, Jouni Taskinen, Juha Karjalainen

{"title":"Sulfate sensitivity of early life stages of freshwater mussels Unio crassus and Margaritifera margaritifera.","authors":"Xiaoxuan Hu, Mikko Mäkinen, Jouni Taskinen, Juha Karjalainen","doi":"10.1007/s10646-024-02794-4","DOIUrl":"10.1007/s10646-024-02794-4","url":null,"abstract":"Sulfate is increasingly found in elevated concentrations in freshwater ecosystems due to anthropogenic activities. Chronic exposure to sulfate has been reported to cause sublethal effects on freshwater invertebrates. Previous sulfate toxicity tests have mostly been conducted in hard or moderately hard waters, and research on species inhabiting soft water is needed, given that freshwater organisms face heightened sensitivity to toxicants in water of lower hardness. In the present study, we examined sulfate sensitivity of two endangered freshwater mussel species, Unio crassus, and Margaritifera margaritifera. Glochidia and juveniles of both species were subjected to acute and/or chronic sulfate exposures in soft water to compare sulfate sensitivity across age groups, and effective concentrations (EC)/lethal concentrations (LC) values were estimated. Mussels were individually exposed to allow relatively larger numbers of replicates per treatment. Chronic sulfate exposure significantly reduced growth, foot movement, and relative water content (RWC) in juvenile mussels of M. margaritifera. Mussels at younger stages were not necessarily more sensitive to sulfate. In the acute tests, LC50 of glochidia of M. margaritifera and U. crassus was 1301 and 857 mg/L, respectively. Chronic LC10 was 843 mg/L for 3-week-old U. crassus juveniles, 1051 mg/L for 7-week-old M. margaritifera juveniles, and 683 mg/L for 2-year-old M. margaritifera juveniles. True chronic Lowest Effective Concentration for 7-week-old M. margaritifera may be within the 95% interval of EC10 based on RWC (EC10 = 446 mg/L, 95%CI = 265-626 mg/L). Our study contributed to the understanding of sulfate toxicity to endangered freshwater mussel species in soft water.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"996-1008"},"PeriodicalIF":2.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11480151/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141901291","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

Nectopsyche sp (Trichoptera: Leptoceridae) sublethal effects caused by different concentrations of arsenic (As): a biochemical markers approach. 不同浓度的砷（As）对 Nectopsyche sp (Trichoptera: Leptoceridae) 的亚致死效应：一种生物化学标记方法。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-11-01 Epub Date: 2024-08-31 DOI: 10.1007/s10646-024-02799-z

Christian Villamarín, Melanie Loachamin, Milton Sosa, Mishell Donoso, Genoveva Granda-Albuja, Pablo Castillejo, Blanca Ríos-Touma

{"title":"Nectopsyche sp (Trichoptera: Leptoceridae) sublethal effects caused by different concentrations of arsenic (As): a biochemical markers approach.","authors":"Christian Villamarín, Melanie Loachamin, Milton Sosa, Mishell Donoso, Genoveva Granda-Albuja, Pablo Castillejo, Blanca Ríos-Touma","doi":"10.1007/s10646-024-02799-z","DOIUrl":"10.1007/s10646-024-02799-z","url":null,"abstract":"Environmental impacts related to arsenic (As) contamination are a persistent issue of particular interest in Latin American countries with increasing mining activities. In Ecuador, the redefinition of public policies to promote the increase in mining since 2008 has led to a significant rise in the presence of this heavy metal in rivers and effluents, sometimes exceeding the 0.1 mg L-1, limit recommended by Ecuadorian Environmental Regulations. This study aimed to evaluate the sublethal effects through the detection of biochemical biomarker changes (Catalase, Antioxidant capacity by FRAP, and Glutathione S-transferase) generated in larvae of Nectopsyche sp following prolonged exposure to different concentrations of As (C1 = 0.05 mg L-1, C2 = 0.1 mg L-1, C3 = 0.8 mg L-1) in a controlled environment, emulating the maximum limits allowed by current Ecuadorian legislation. While As concentration levels in water increased, so did levels in the tissue of Nectopsyche sp specimens. On the other hand, behavioral parameters (mortality and mobility) did not show differences in either time or As concentrations. However, both Catalase and Antioxidant capacity by FRAP levels tended to decrease with increasing As concentration, and in both cases, the differences were significant. Additionally, Glutathione S-transferase activity did not increase significantly. These results preliminarily demonstrate that biochemical responses change with varying As concentrations in Nectopsyche sp and are affected at behavioral and biochemical levels produced by the As at chronic levels.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"1062-1073"},"PeriodicalIF":2.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142105469","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

Chronic effects of metal releases from historical mining on threatened crayfish in Madison County Missouri, USA. 美国密苏里州麦迪逊县历史采矿产生的金属释放物对濒危小龙虾的慢性影响。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-11-01 Epub Date: 2024-09-04 DOI: 10.1007/s10646-024-02773-9

A L Allert, D Cleveland, R J DiStefano, M L Wildhaber, L K Lueckenhoff

{"title":"Chronic effects of metal releases from historical mining on threatened crayfish in Madison County Missouri, USA.","authors":"A L Allert, D Cleveland, R J DiStefano, M L Wildhaber, L K Lueckenhoff","doi":"10.1007/s10646-024-02773-9","DOIUrl":"10.1007/s10646-024-02773-9","url":null,"abstract":"The Little St. Francis River and its tributaries drain metals-contaminated areas of the Madison County Mines National Priority List Superfund site (MCM) which was designated in 2003 to facilitate remediation of metals contamination within the MCM. One concern for natural resource trustees in the MCM is the potential effects of elevated metals concentrations on the federally threatened St. Francis River crayfish, Faxonius quadruncus, which has a geographic range that is limited to the St. Francis River watershed. A survey of riffle-dwelling crayfish, in-situ cage study, and laboratory toxicity tests were conducted to assess the effects of mining-derived metals on F. quadruncus and other crayfish species in the MCM. Crayfish densities were significantly greater at sites upstream of metals releases from historical mining (henceforth mining releases) compared to densities at sites downstream of mining releases, and metals concentrations in whole-body crayfish, surface water, sediments, macroinvertebrates, fish, and plant material were greater at sites downstream of mining releases compared to sites upstream of mining releases. Crayfish densities were also negatively correlated with consensus-based adverse effects indices, expressed as surface-water toxic units and sediment probable effects quotients. Decreased growth and increased mortality during cage and laboratory studies were likely due to exposure to, and subsequently uptake of, elevated concentrations of metals. Crayfish in all studies were found to bioaccumulate metals, which supports their utility as bioindicators of metals contamination. Study results show that elevated metals concentrations associated with mining releases in the MCM continue to adversely affect biota, including the federally threatened F. quadruncus.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"1096-1121"},"PeriodicalIF":2.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142132157","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

Toxicity of isolated and mixed metals to a native Amazonian ostracod and ecological risk assessment. 分离金属和混合金属对亚马孙本地鸵鸟的毒性及生态风险评估

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-11-01 Epub Date: 2024-08-31 DOI: 10.1007/s10646-024-02800-9

Diego Ferreira Gomes, Hevelyn Plácido Brito, Julia Gomes do Vale, Thandy Júnior da Silva Pinto, Raquel Aparecida Moreira, Odete Rocha

{"title":"Toxicity of isolated and mixed metals to a native Amazonian ostracod and ecological risk assessment.","authors":"Diego Ferreira Gomes, Hevelyn Plácido Brito, Julia Gomes do Vale, Thandy Júnior da Silva Pinto, Raquel Aparecida Moreira, Odete Rocha","doi":"10.1007/s10646-024-02800-9","DOIUrl":"10.1007/s10646-024-02800-9","url":null,"abstract":"In recent decades the Amazonian ecosystem has received large amounts of domestic and industrial effluents, as well as mining-related waste contributing significant quantities of metal to water bodies. Thus, the main objective of the study was to verify the sensitivity of a native Amazonian ostracod (Strandesia rondoniensis) species to isolated and mixed metal salts (CuSO4; ZnCl2; CdCl2 and HgCl2). The sensitivity will be compared to other species using species sensitivity distributions (SSDs) for an ecological risk assessment (ERA). The experiment consisted of simultaneously exposing each metal alone and in mixture, through a factorial design for toxicity with 25 different combinations for 48 h. For the ERA, metal concentrations measured in the water of various aquatic environments in the Amazon basin were considered based on the risk quotient values. The results showed that the metal toxicity gradient was Cd>Hg>Cu>Zn, respectively. The toxicity in the mixture showed that the combination of Cu-Cd and Cu-Zn better fit the model (CA), indicating mainly synergism when copper predominated in the mixture. Meanwhile, the Cu-Hg interaction fit the model better (IA), again indicating synergism when copper was at a higher concentration. The ERA showed a high risk (RQ > 1) for the Cd, Cu, and Hg metals.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"1074-1085"},"PeriodicalIF":2.4,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142105471","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

Trace element contamination in three shorebird species migrating through Delaware Bay, New Jersey: arsenic, mercury and selenium are increasing. 迁徙经过新泽西州特拉华湾的三种海岸鸟类体内的微量元素污染：砷、汞和硒正在增加。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-10-29 DOI: 10.1007/s10646-024-02816-1

Joanna Burger, Stephanie Feigin

{"title":"Trace element contamination in three shorebird species migrating through Delaware Bay, New Jersey: arsenic, mercury and selenium are increasing.","authors":"Joanna Burger, Stephanie Feigin","doi":"10.1007/s10646-024-02816-1","DOIUrl":"https://doi.org/10.1007/s10646-024-02816-1","url":null,"abstract":"Many shorebird populations are declining, and contaminants may be partly contributing to the decline by interfering with feeding, migration, and breeding success. The goal of our study was to determine whether there was a temporal change in concentrations of trace elements of red knot (Calidris canutus rufa), sanderling (Calidris alba), and ruddy turnstone (Arenaria interpres) during spring migration in Delaware Bay, New Jersey, USA. We sampled blood to 1) determine levels of trace elements in 2019, 2) compare 2019 trace element levels with those from shorebirds in 2011-2012, and 3) examine variability in blood levels of trace elements among species. In 2019: 1) trace element levels were significantly different among species (except cadmium[Cd]), 2) Cd was lowest in all species, and arsenic (As) and selenium (Se) were highest, and 3) sanderlings had the highest levels of As and Se, and knots had the highest levels of chromium (Cr) and lead (Pb). Se was higher in these shorebirds than reported for other shorebirds from elsewhere. As, mercury (Hg), and Se increased significantly between 2011-2012 and 2019 in all three species. There were no significant temporal changes in Cd. Chromium (Cr) decreased in knots and sanderling. The temporal increases in As, Se, and Hg bear watching as they are toxic in vertebrates, and each can decrease the toxicity of the others. The data indicate that shorebirds can be bioindicators of changing trace element levels in estuaries, potentially providing early warning of increasing levels of As, Hg, and Se in the environment.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142544402","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

Subchronic exposure to nonylphenol ethoxylate (NPE) induces cardiotoxicity and oxidative stress in American bullfrog tadpoles: a mechanistic approach. 亚慢性接触壬基酚聚氧乙烯醚（NPE）会诱发美洲牛蛙蝌蚪的心脏毒性和氧化应激：一种机理研究方法。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-10-29 DOI: 10.1007/s10646-024-02822-3

Yan Costa Gonçalves, Bruno Hofstatter da Silva, Camila Reis de Godoy, Francisco Tadeu Rantin, Ana Lúcia Kalinin, Diana Amaral Monteiro

{"title":"Subchronic exposure to nonylphenol ethoxylate (NPE) induces cardiotoxicity and oxidative stress in American bullfrog tadpoles: a mechanistic approach.","authors":"Yan Costa Gonçalves, Bruno Hofstatter da Silva, Camila Reis de Godoy, Francisco Tadeu Rantin, Ana Lúcia Kalinin, Diana Amaral Monteiro","doi":"10.1007/s10646-024-02822-3","DOIUrl":"https://doi.org/10.1007/s10646-024-02822-3","url":null,"abstract":"Tropical regions, particularly those with high levels of endemism such as South America, harbor a diverse array of amphibian species. However, these regions often lack specific regulations governing the release of emerging contaminants, including the surfactant nonylphenol ethoxylate (NPE), into water bodies, which can have devastating consequences for these sensitive ecosystems. This study evaluated the sublethal effects of 16-day subchronic exposure to NPE at an environmentally relevant concentration of 30 µg/L on American bullfrog (Lithobates catesbeianus) tadpoles using multiple endpoints, including biometric parameters, antioxidant responses, oxidative stress biomarkers, heart rate, and myocardial contractility. Our results revealed that exposure to NPE elicited a range of harmful effects on tadpoles, including significant reductions in hepatic and ventricular mass, disruptions in antioxidant defenses leading to oxidative stress-mediated damage in cardiac, hepatic, and muscular tissues, and changes in heart function such as negative inotropism and lusitropism, and tachycardia. These sublethal effects could have significant ecological impacts, affecting not only immediate survival but also compromising overall fitness through the reallocation of energy reserves.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142544401","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

Use of biomarkers in bullfrog tadpoles Aquarana catesbeiana (Shaw 1802) for ecotoxicological evaluation of Pirajibú River (São Paulo, Brazil). 利用牛蛙蝌蚪 Aquarana catesbeiana (Shaw 1802) 的生物标志物对皮拉吉布河（巴西圣保罗）进行生态毒理学评估。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-10-28 DOI: 10.1007/s10646-024-02821-4

Cleoni Dos Santos Carvalho, Fabio Henrique da Silva, João Victor Cassiel Ferraz, Gabriel Hiroshi Fujiwara, Luciana Camargo de Oliveira, Heidi Samantha Moraes Utsunomiya, Iolanda Cristina Silveira Duarte, Letícia Portugal do Nascimento

{"title":"Use of biomarkers in bullfrog tadpoles Aquarana catesbeiana (Shaw 1802) for ecotoxicological evaluation of Pirajibú River (São Paulo, Brazil).","authors":"Cleoni Dos Santos Carvalho, Fabio Henrique da Silva, João Victor Cassiel Ferraz, Gabriel Hiroshi Fujiwara, Luciana Camargo de Oliveira, Heidi Samantha Moraes Utsunomiya, Iolanda Cristina Silveira Duarte, Letícia Portugal do Nascimento","doi":"10.1007/s10646-024-02821-4","DOIUrl":"https://doi.org/10.1007/s10646-024-02821-4","url":null,"abstract":"This study focused on investigating the water quality in the Pirajibú River, a relevant water body that flows through the industrial zone of Sorocaba (São Paulo/Brazil). Due to the limitations of assessing water quality based solely on standard physicochemical tests, an ecotoxicological approach was used to assess biomarker changes in the liver of bullfrog tadpoles (Aquarana catesbeiana). The animals were divided into groups and exposed to water samples collected upstream and downstream of the industrial zone. After 96 h, the upstream group presented a decrease in the enzymatic activity of glutathione peroxidase (GPx) and superoxide dismutase (SOD) and an increase in the activity of catalase (CAT). For the downstream group, while a decreased activity was observed for SOD, an increase in CAT and glutathione S-transferase (GST) activities was noted. A decrease in lipid peroxidation (LPO) levels was observed in the downstream group, and increased carbonyl protein (PCO) levels in the upstream and downstream groups. Integrated Biomarker Response (IBR) revealed GSH and PCO as the most responsive biomarkers, despite the lack of differences noted between the groups. Regardless of whether the water quality standards of Pirajibú River were following Brazilian environmental legislation, the tadpoles presented high sensitivity when exposed to the water, even for a short period.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142521367","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

Combined toxic effects of yessotoxin and polystyrene on the survival, reproduction, and population growth of rotifer Brachionus plicatilis at different temperatures. 叶索毒素和聚苯乙烯在不同温度下对轮虫Brachionus plicatilis的存活、繁殖和种群增长的联合毒性效应。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-10-24 DOI: 10.1007/s10646-024-02819-y

Ye Liang, Jun Yang, Zongyan Zhang, Yujing Xiao, Haifeng Gu

{"title":"Combined toxic effects of yessotoxin and polystyrene on the survival, reproduction, and population growth of rotifer Brachionus plicatilis at different temperatures.","authors":"Ye Liang, Jun Yang, Zongyan Zhang, Yujing Xiao, Haifeng Gu","doi":"10.1007/s10646-024-02819-y","DOIUrl":"https://doi.org/10.1007/s10646-024-02819-y","url":null,"abstract":"Yessotoxin (YTX) is a disulfated toxin produced by harmful dinoflagellates and causes risks to aquatic animals. Polystyrene (PS) microplastics could absorb toxins in seawaters but pose threats to organism growth. In this study, the combined toxic effects of YTX (0, 20, 50, and 100 µg L-1) and PS (0, 5, and 10 µg mL-1) on the survival, reproduction, and population growth of marine rotifer Brachionus plicatilis at 20 °C, 25 °C, and 30 °C were evaluated. Results indicated that the survival time (S), time to first batch of eggs (Ft), total offspring per rotifer (Ot), generational time (T0), net reproduction rate (R0), intrinsic growth rate (rm), and population growth rate (r) of rotifers were inhibited by YTX and PS at 25 °C and 30 °C. Low temperature (20 °C) improved the life-table parameters T0, R0, and rm at YTX concentrations less than 100 µg L-1. Temperature, YTX, and PS had interactive effects on rotifers' S, Ft, Ot, T0, R0, rm, and r. The combined negative effects of YTX and PS on rotifers' survival, reproduction, and population growth were significantly enhanced at 30 °C. These findings emphasized the importance of environmental temperature in studying the interactive effects of microplastics and toxins on the population growth of zooplankton in eutrophic seawaters.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142497103","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

Toxicity effects of hexavalent chromium on hematological, biochemical and digestive enzyme profiles of Labeo rohita (Hamilton, 1822). 六价铬对 Labeo rohita（汉密尔顿，1822 年）血液学、生物化学和消化酶谱的毒性效应。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-10-21 DOI: 10.1007/s10646-024-02815-2

Archisman Ray, Debashri Mondal, Nabanita Chakraborty, Shreyosree Ganguly

{"title":"Toxicity effects of hexavalent chromium on hematological, biochemical and digestive enzyme profiles of Labeo rohita (Hamilton, 1822).","authors":"Archisman Ray, Debashri Mondal, Nabanita Chakraborty, Shreyosree Ganguly","doi":"10.1007/s10646-024-02815-2","DOIUrl":"https://doi.org/10.1007/s10646-024-02815-2","url":null,"abstract":"The study provides a descriptive understanding of the toxic effect of heavy metal chromium on the hematological, biochemical, and digestive enzyme profiles in the fingerlings of Labeo rohita. The 96-h LC50 of hexavalent chromium was found to be 15.76 mg/L. Further, the toxicity study was conducted with four different sub-lethal concentrations of 96-h LC50 viz. 1/40th, 1/20th, 1/10th, and 1/5th respectively. The blood samples from the control and treated groups exposed to different concentrations were examined for various physiological parameters. The obtained data showed that, with the increase in sub-lethal concentration, a significant decrease (p < 0.05) in red blood cell (RBCs), hemoglobin (Hb), and hematocrit (Hct) was observed, while total white blood cell (WBCs), mean corpuscular volume (MCV), and mean corpuscular hemoglobin (MCH) increased significantly (p < 0.05) in all the treatments. Fishes exposed to chromium for 30 days responded by becoming hyperglycemic, hyperproteineric, and hypoalbuminemia with a gradual rise in concentrations. Alteration in the intestinal digestive enzyme profiles was also observed after 30 days of study. The activity of protease (89.76%), and amylase (41.88%) decreased in the intestine with the highest concentration compared to the control. Conversely, compared to the control, the highest concentration resulted in an increase (146%) in lipase activity. Overall, this study has greatly enhanced our comprehension of the impact of chromium toxicity on various hematological, biochemical, and digestive enzyme parameters in Labeo rohita.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142460663","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

Gut microbiome as biomarker for triclosan toxicity in Labeo rohita: bioconcentration, immunotoxicity and metagenomic profiling. 作为三氯生毒性生物标志物的鲮鱼肠道微生物组：生物浓缩、免疫毒性和元基因组分析。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-10-20 DOI: 10.1007/s10646-024-02817-0

Angom Baleshwor Singh, Tapas Paul, S P Shukla, Saurav Kumar, Sanath Kumar, Ganesh Kumar, Kundan Kumar

{"title":"Gut microbiome as biomarker for triclosan toxicity in Labeo rohita: bioconcentration, immunotoxicity and metagenomic profiling.","authors":"Angom Baleshwor Singh, Tapas Paul, S P Shukla, Saurav Kumar, Sanath Kumar, Ganesh Kumar, Kundan Kumar","doi":"10.1007/s10646-024-02817-0","DOIUrl":"https://doi.org/10.1007/s10646-024-02817-0","url":null,"abstract":"Triclosan (TCS) is a lipophilic, broad spectrum antimicrobial agent commonly used in personal care products with a projected continuous escalation in aquatic environments in the post COVID 19 era. There is rich documentation in the literature on the alteration of physiological responses in fish due to TCS exposure; however, studies on gut associated bacteria of fish are still scarce. This is the first attempt to determine changes in bacterial community structure due to exposure of TCS on Labeo rohita, a commercially essential freshwater species, using 16S V3-V4 region ribosomal RNA (rRNA) next-generation sequencing (NGS). Chronic exposure of TCS at environmentally realistic concentrations viz. 1/5th (T1: 0.129 mg/L) and 1/10th (T2: 0.065 mg/L) of LC50 for 28 days resulted in the dose dependent bioconcentration of TCS in the fish gut. Prolonged exposure to TCS leads to disruption of gut bacteria evidenced by down regulation of the host immune system. Additionally, high-throughput sequencing analysis showed alternation in the abundance and diversity of microbial communities in the gut, signifying Proteobacteria and Verrucomicrobia as dominant phyla. Significant changes were also observed in the relative abundance of Chloroflexi and Gammatimonadetes phyla in TCS exposed groups. The study revealed that gut microbiome can be used as a biomarker in assessing the degree of TCS toxicity in commercially important fish species.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142460660","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