Ecotoxicology最新文献_第10页

Colony environment and absence of brood enhance tolerance to a neonicotinoid in winter honey bee workers, Apis mellifera. 蜂群环境和无雏性增强了冬蜜蜂工蜂对一种新烟碱的耐受性。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-08-01 Epub Date: 2024-05-23 DOI: 10.1007/s10646-024-02758-8

Manon Bovier, Domenic W Camenzind, Andrew F Brown, Lukas Jeker, Gina Retschnig, Peter Neumann, Lars Straub

{"title":"Colony environment and absence of brood enhance tolerance to a neonicotinoid in winter honey bee workers, Apis mellifera.","authors":"Manon Bovier, Domenic W Camenzind, Andrew F Brown, Lukas Jeker, Gina Retschnig, Peter Neumann, Lars Straub","doi":"10.1007/s10646-024-02758-8","DOIUrl":"10.1007/s10646-024-02758-8","url":null,"abstract":"In eusocial insects, worker longevity is essential to ensure colony survival in brood-free periods. Trade-offs between longevity and other traits may render long-living workers in brood-free periods more susceptible to pesticides compared to short-lived ones. Further, colony environment (e.g., adequate nutrition) may enable workers to better cope with pesticides, yet data comparing long vs. short-living workers and the role of the colony environment for pesticide tolerance are scarce. Here, we show that long-living honey bee workers, Apis mellifera, are less susceptible to the neonicotinoid thiamethoxam than short-lived workers, and that susceptibility was further reduced when workers were acclimatized under colony compared to laboratory conditions. Following an OECD protocol, freshly-emerged workers were exposed to thiamethoxam in summer and winter and either acclimatized within their colony or in the laboratory. Mortality and sucrose consumption were measured daily and revealed that winter workers were significantly less susceptible than summer workers, despite being exposed to higher thiamethoxam dosages due to increased food consumption. Disparencies in fat body activity, which is key for detoxification, may explain why winter bees were less susceptible. Furthermore, colony acclimatization significantly reduced susceptibility towards thiamethoxam in winter workers likely due to enhanced protein nutrition. Brood absence and colony environment seem to govern workers' ability to cope with pesticides, which should be considered in risk assessments. Since honey bee colony losses occur mostly over winter, long-term studies assessing the effects of pesticide exposure on winter bees are required to better understand the underlying mechanisms.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"608-621"},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11252217/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141079577","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

Environmental presence and toxicological outcomes of the herbicide pendimethalin in teleost fish. 除草剂戊草胺在远洋鱼类体内的环境存在和毒理学结果。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-08-01 Epub Date: 2024-06-19 DOI: 10.1007/s10646-024-02767-7

Emma Ivantsova, Christopher J Martyniuk

{"title":"Environmental presence and toxicological outcomes of the herbicide pendimethalin in teleost fish.","authors":"Emma Ivantsova, Christopher J Martyniuk","doi":"10.1007/s10646-024-02767-7","DOIUrl":"10.1007/s10646-024-02767-7","url":null,"abstract":"Herbicides are often detected in aquatic ecosystems due to residential and agricultural applications and can harm aquatic organisms once deposited into water systems. Pendimethalin is part of the dinitroaniline chemical family and is applied to crops like corn, legumes, potatoes, and soybeans. The potential toxicity of pendimethalin to aquatic species is understudied compared to other widely studied herbicides, like atrazine and glyphosate. The objectives of this review were to (1) collate information on sub-lethal responses to pendimethalin exposure in fish, (2) evaluate how exposure studies relate to environmental concentrations, and (3) identify putative bioindicators for exposure studies. Overall, studies reporting pendimethalin in water systems worldwide indicate a range of 100-300 ng/L, but levels have been reported as high as ~15 µg/g in sediment. In teleost fish, studies demonstrate developmental toxicity, immunotoxicity, and behavioral disruptions. The strongest evidence for pendimethalin-induced toxicity involves oxidative stress, although studies often test toxicity at higher concentrations than environmentally relevant levels. Using the Comparative Toxicogenomics Database, pathway analysis reveals linkages to neurotoxicity and mechanisms of neurodegeneration like \"Ubiquitin Dependent Protein Degradation\", \"Microtubule Cytoskeleton\", \"Protein Oxidation and Aggregation in Aging\", and \"Parkinson's Disease\". Other prominent pathways included those related to mTOR signaling and reproduction. Thus, two potential mechanisms underlying pendimethalin-induced toxicity in fish include the neural and reproductive systems. This review synthesizes current data regarding environmental fate and ecotoxicology of pendimethalin in teleost fish and points to some putative physiological and molecular responses that may be beneficial for assessing toxicity of the herbicide in future investigations.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"531-545"},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141418382","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

Comparative effects of different metals on the Japanese medaka embryos and larvae. 不同金属对日本青鳉胚胎和幼体影响的比较

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-08-01 Epub Date: 2024-06-08 DOI: 10.1007/s10646-024-02762-y

Wenji Zhou, Jiating Chen, Ping Liu, Feifan Wang, Hongxing Chen

{"title":"Comparative effects of different metals on the Japanese medaka embryos and larvae.","authors":"Wenji Zhou, Jiating Chen, Ping Liu, Feifan Wang, Hongxing Chen","doi":"10.1007/s10646-024-02762-y","DOIUrl":"10.1007/s10646-024-02762-y","url":null,"abstract":"Rapid evaluation of the toxicity of metals using fish embryo acute toxicity is facilitative to ecological risk assessment of aquatic organisms. However, this approach has seldom been utilized for the comparative study on the effects of different metals to fish. In this study, acute and sub-chronic tests were used to compare the toxicity of Se(IV) and Cd in the embryos and larvae of Japanese medaka (Oryzias latipes). The embryos with different levels of dechorionation and/or pre-exposure were also exposed to Se(IV) and Cd at various concentrations. The results showed that the LC50-144 h of Cd was 1.3-5.2 folds higher than that of Se(IV) for the embryos. In contrast, LC50-96 h of Se(IV) were 200-400 folds higher than that of Cd for the larvae. Meanwhile, dechorionated embryos were more sensitive to both Se and Cd than the intact embryos. At elevated concentrations, both Se and Cd caused mortality and deformity in the embryos and larvae. In addition, pre-exposure to Cd at the embryonic stages enhanced the resistance to Cd in the larvae. However, pre-exposure to Se(IV) at the embryonic stages did not affect the toxicity of Se(IV) to the larvae. This study has distinguished the nuance differences in effects between Se(IV) and Cd after acute and sub-chronic exposures with/without chorion. The approach might have a potential in the comparative toxicology of metals (or other pollutants) and in the assessment of their risks to aquatic ecosystems.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"653-661"},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141293287","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

Land disposal of dredged sediments from an urbanized tropical lagoon: toxicity to soil fauna. 城市化热带泻湖疏浚沉积物的土地处置：对土壤动物的毒性。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-08-01 Epub Date: 2024-05-11 DOI: 10.1007/s10646-024-02757-9

Rodrigo Lourenço, Ricardo Cesar, Gustavo Koifman, Matheus Teixeira, Domynique Santos, Helena Polivanov, Katia Alexandre, Manuel Carneiro, Lilian Irene Dias da Silva, Mariana Mello Santos Cerveira Pereira, Zuleica Castilhos

{"title":"Land disposal of dredged sediments from an urbanized tropical lagoon: toxicity to soil fauna.","authors":"Rodrigo Lourenço, Ricardo Cesar, Gustavo Koifman, Matheus Teixeira, Domynique Santos, Helena Polivanov, Katia Alexandre, Manuel Carneiro, Lilian Irene Dias da Silva, Mariana Mello Santos Cerveira Pereira, Zuleica Castilhos","doi":"10.1007/s10646-024-02757-9","DOIUrl":"10.1007/s10646-024-02757-9","url":null,"abstract":"Urban tropical lagoons are commonly impacted by silting, domestic sewage and industrial wastes and the dredging of their sediments is often required to minimize environmental impacts. However, the ecological implications of land disposal of dredged sediments are still poorly investigated in the tropics. Aiming to contribute to filling this gap, an ecotoxicological evaluation was conducted with dredged sediments from Tijuca Lagoon (Rio de Janeiro, Brazil) using different lines of evidence, including soil and sediment characterization, metal determination, and acute and avoidance bioassays with Eisenia andrei. Two different dredged sediment samples, a sandy sediment and another muddy one, were obtained in two distinct and spatially representative sectors of the Tijuca Lagoon. The sediments were mixed with an artificial soil, Ferralsol and Spodosol to obtain doses between 0 (pure soil) and 12%. The sediment dose that caused mortality (LC50) or avoidance responses (EC50) to 50% of the organisms was estimated through PriProbit analysis. Metal concentrations and toxicity levels were higher in the muddy sediment (artificial soil LC50 = 3.84%; Ferralsol LC50 = 4.58%; Spodosol LC50 = 2.85%) compared to the sandy one (artificial soil LC50 = 10.94%; Ferralsol LC50 = 14.36%; Spodosol LC50 = 10.38%), since fine grains tend to adsorb more organic matter and contaminants. Mortality and avoidance responses were the highest in Spodosol due to its extremely sandy texture (98% of sand). Metal concentrations in surviving earthworms were generally low, except sodium whose bioaccumulation was high. Finally, the toxicity is probably linked to marine salts, and the earthworms seem to accumulate water in excess to maintain osmotic equilibrium, increasing their biomass.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"590-607"},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140908607","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 acute toxicity of the pesticide Chlorpyrifos and the metal Cadmium, both individually and in mixtures, on two species of native neotropical cladocerans. 杀虫剂毒死蜱和金属镉单独或混合物对两种本地新热带蛤类的急性毒性影响。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-08-01 Epub Date: 2024-05-22 DOI: 10.1007/s10646-024-02761-z

Larissa Broggio Raymundo, Diego Ferreira Gomes, Mariana Miguel, Raquel Aparecida Moreira, Odete Rocha

{"title":"Effects of acute toxicity of the pesticide Chlorpyrifos and the metal Cadmium, both individually and in mixtures, on two species of native neotropical cladocerans.","authors":"Larissa Broggio Raymundo, Diego Ferreira Gomes, Mariana Miguel, Raquel Aparecida Moreira, Odete Rocha","doi":"10.1007/s10646-024-02761-z","DOIUrl":"10.1007/s10646-024-02761-z","url":null,"abstract":"The excessive use of pesticides in agriculture and the widespread use of metals in industrial activities and or technological applications has significantly increased the concentrations of these pollutants in both aquatic and terrestrial ecosystems worldwide, making aquatic biota increasingly vulnerable and putting many species at risk of extinction. Most aquatic habitats receive pollutants from various anthropogenic actions, leading to interactions between compounds that make them even more toxic. The aim of this study was to assess the effects of the compounds Chlorpyrifos (insecticide) and Cadmium (metal), both individually and in mixtures, on the cladocerans Ceriodaphnia rigaudi and Ceriodaphnia silvestrii. Acute toxicity tests were conducted for the compounds individually and in mixture, and an ecological risk assessment (ERA) was performed for both compounds. Acute toxicity tests with Cadmium resulted in EC50-48 h of 0.020 mg L-1 for C. rigaudi and 0.026 mg L-1 for C. silvestrii, while tests with Chlorpyrifos resulted in EC50-48 h of 0.047 μg L-1 and 0.062 μg L-1, respectively. The mixture test for C. rigaudi showed the occurrence of additive effects, while for C. silvestrii, antagonistic effects occurred depending on the dose level. The species sensitivity distribution curve for crustaceans, rotifers, amphibians, and fishes resulted in an HC5 of 3.13 and an HC50 of 124.7 mg L-1 for Cadmium; an HC5 of 9.96 and an HC50 of 5.71 μg L-1 for Chlorpyrifos. Regarding the ERA values, Cadmium represented a high risk, while Chlorpyrifos represented an insignificant to a high risk.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"642-652"},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141075862","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

The impact of Roundup® Original DI on the hemolymph metabolism and gill and hepatopancreas oxidative balance of Parastacus promatensis (Crustacea, Decapoda, Parastacidae). Roundup® Original DI 对 Parastacus promatensis（甲壳动物，十足目，副栉目）血淋巴代谢以及鳃和肝胰脏氧化平衡的影响。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-08-01 Epub Date: 2024-05-22 DOI: 10.1007/s10646-024-02760-0

Jonas Brum González, Eduarda Cidade Oliveira, Guendalina Turcato Oliveira

{"title":"The impact of Roundup® Original DI on the hemolymph metabolism and gill and hepatopancreas oxidative balance of Parastacus promatensis (Crustacea, Decapoda, Parastacidae).","authors":"Jonas Brum González, Eduarda Cidade Oliveira, Guendalina Turcato Oliveira","doi":"10.1007/s10646-024-02760-0","DOIUrl":"10.1007/s10646-024-02760-0","url":null,"abstract":"In Brazil, glyphosate is present in more than 130 commercial formulations, and its toxic effects have already been tested in different species to understand its impact on biota Decapod crustaceans are widely used as experimental models due to their biology, sensitivity to pollutants, ease of collection, and maintenance under laboratory conditions. We evaluated the changes in metabolism (hemolymph) and oxidative balance markers (gill and hepatopancreas) of a crayfish (Parastacus promatensis) after exposure to Roundup® (active ingredient: glyphosate). The crayfish were captured in the Garapiá stream within the Center for Research and Conservation of Nature Pró-Mata, Brazil. We collected adult animals outside (fall) and during (spring) the breeding season. The animals were transported in buckets with cooled and aerated water from the collection site to the aquatic animal maintenance room at the university. After acclimatization, the animals were exposed to different concentrations of glyphosate (0, 65, 260, 520, and 780 µg/L). The results showed a significant variation in the hemolymph glucose, lactate, and protein levels. We observed variations in the tissue antioxidant enzymatic activity after exposure to glyphosate. Finally, the increase in oxidative damage required a high energy demand from the animals to maintain their fitness, which makes them more vulnerable to stress factors added to the habitat.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"630-641"},"PeriodicalIF":2.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141079648","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

Heavy metal exposure reduces larval gut microbiota diversity of the rice striped stem borer, Chilo suppressalis 重金属暴露降低了水稻条纹二化螟幼虫肠道微生物群的多样性

IF 2.7 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-07-27 DOI: 10.1007/s10646-024-02792-6

Jie Wang, Hexi Huang, Hailin Yang, Su Wang, Mengnan Li, Zhengyang Zhu, John T. Trumble, Ning Di, Liansheng Zang

{"title":"Heavy metal exposure reduces larval gut microbiota diversity of the rice striped stem borer, Chilo suppressalis","authors":"Jie Wang, Hexi Huang, Hailin Yang, Su Wang, Mengnan Li, Zhengyang Zhu, John T. Trumble, Ning Di, Liansheng Zang","doi":"10.1007/s10646-024-02792-6","DOIUrl":"https://doi.org/10.1007/s10646-024-02792-6","url":null,"abstract":"Cadmium (Cd), a widely distributed environmental pollutant in agroecosystems, causes negative effects on crops and herbivores through bottom-up processes. The gut microbial community of an insect can play a critical role in response to metal stress. To understand how microbiota affect the stress responses of organisms to heavy metals in agroecosystems, we initially used 16S rRNA sequencing to characterize the larval gut microbiota of Chilo suppressalis, an important agricultural pest, exposed to a diet containing Cd. The species richness, diversity, and composition of the gut microbial community was then analyzed. Results revealed that while the richness (Chao1 and ACE) of gut microbiota in larvae exposed to Cd was not significantly affected, diversity (Shannon and Simpson) was reduced due to changes in species distribution and relative abundance. Overall, the most abundant genus was Enterococcus, while the abundance of the genera Micrococcaceae and Faecalibaculum in the control significantly superior to that in Cd-exposed pests. Phylogenetic investigation of microbial communities by the reconstruction of unobserved states (PICRUSt) showed that the intestinal microorganisms appear to participate in 34 pathways, especially those used in environmental information processing and the metabolism of the organism. This study suggests that the gut microbiota of C. suppressalis are significantly impacted by Cd exposure and highlights the importance of the gut microbiome in host stress responses and negative effects of Cd pollution in agroecosystems.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":"168 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141780031","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

Investigating the diet source influence on freshwater fish mercury bioaccumulation and fatty acids-Experiences from Swedish lakes and Chinese reservoirs. 日粮来源对淡水鱼汞生物积累和脂肪酸影响的研究——瑞典湖泊和中国水库的经验。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-07-01 Epub Date: 2023-11-15 DOI: 10.1007/s10646-023-02712-0

Pianpian Wu, Haiyu Yan, Martin J Kainz, Brian Branfireun, Ann-Kristin Bergström, Min Jing, Kevin Bishop

{"title":"Investigating the diet source influence on freshwater fish mercury bioaccumulation and fatty acids-Experiences from Swedish lakes and Chinese reservoirs.","authors":"Pianpian Wu, Haiyu Yan, Martin J Kainz, Brian Branfireun, Ann-Kristin Bergström, Min Jing, Kevin Bishop","doi":"10.1007/s10646-023-02712-0","DOIUrl":"10.1007/s10646-023-02712-0","url":null,"abstract":"Dietary uptake is key for transferring potentially toxic contaminants, such as mercury (Hg) and essential dietary nutrients, such as polyunsaturated fatty acids (PUFA), to consumers at higher trophic levels of aquatic food webs. We evaluated the role of diet sources for Hg bioaccumulation and PUFA retention in fish across lake food webs in seven Swedish lakes and two Chinese reservoirs. Fish total Hg (THg) and methyl-Hg (MeHg) differed greatly between the two countries: the Chinese fish contained less than 300 ng g-1 dry weight (d.w.) THg with less than 50% as MeHg, versus the Swedish fishes which contained approximately 2000 ng g-1 d.w. THg and nearly 100% as MeHg. Fatty acids enrichment of linoleic acids (LIN) were more prevalent in the Chinese fishes regardless of size (p < 0.05). Here we examined food web length, fish growth rates, and fatty acids patterns in relation to the quality of fish as a food source for both Hg and FA. Contrary to the expectation that biodilution of Hg throughout the food chain would explain these differences, a more complex picture emerged with high levels of Hg at the base of the food web in the Chinese reservoirs, a decoupling of fatty acid and Hg bioaccumulation, and a major role for both fish stocking and fish feed. It is hoped that this work will provide a nuanced picture of fish quality as a food source in different ecosystems.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"415-424"},"PeriodicalIF":2.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"107590476","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 biomagnification in the food chain of a piscivorous turtle species (Testudines: Chelidae: Chelus fimbriata) in the Central Amazon, Brazil. 巴西亚马逊河中部一种食鱼海龟（Testudines: Chelidae: Chelus fimbriata）食物链中的汞生物放大作用。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-07-01 Epub Date: 2024-05-03 DOI: 10.1007/s10646-024-02756-w

Fábio Andrew G Cunha, Bruce R Forsberg, Richard C Vogt, Fabíola X V Domingos, Bruce G Marshall, Brendson C Brito, Otávio P de Sousa, Daniele Kasper, Ana Laura P Santos, Marcelo Ândrade

{"title":"Mercury biomagnification in the food chain of a piscivorous turtle species (Testudines: Chelidae: Chelus fimbriata) in the Central Amazon, Brazil.","authors":"Fábio Andrew G Cunha, Bruce R Forsberg, Richard C Vogt, Fabíola X V Domingos, Bruce G Marshall, Brendson C Brito, Otávio P de Sousa, Daniele Kasper, Ana Laura P Santos, Marcelo Ândrade","doi":"10.1007/s10646-024-02756-w","DOIUrl":"10.1007/s10646-024-02756-w","url":null,"abstract":"Due to their natural history and ecological attributes, turtles are excellent organisms for studies of heavy metal contamination. Turtles have a large geographical distribution, occupy different aquatic habitats, and occupy various trophic levels. The present study investigated mercury bioaccumulation in the carnivorous chelonian Chelus fimbriata (Matamata turtle) and Hg biomagnification in relation to its aquatic food chain in the middle Rio Negro, AM-Brazil. Tissue samples of muscle, carapace and claws were collected from 26 C. fimbriata individuals, as well as collections of autotrophic energy sources found in the turtle's aquatic habitat area. The samples were collected in February-March/2014 and analyzed for THg concentrations and carbon (δ13C) and nitrogen (δ15N) stable isotopes. The highest THg levels were found in claws (3780 ng.g-1), carapace (3622 ng.g-1) and muscle (403 ng.g-1), which were found to be significantly different [F(2.73) = 49.02 p < 0.01]. However, THg concentrations in muscle tissue were below the consumption threshold indicated by the WHO and Brazilian Health Ministry. The average δ13C and δ15N values in Matamata samples were -31.7‰ and 11.9‰, respectively. The principal energy source sustaining the food chain of C. fimbriata was found to be terrestrial shrubs, with smaller contributions from emergent aquatic herbaceous plants and algae, while δ15N values showed its trophic position to be two levels above the autotrophic energy sources. There was a positive correlation between THg and turtle size, while a significant relationship was found between THg and δ15N, showing strong biomagnification in the food chain of C. fimbriata: y = 0.21x + 0.46; r2 = 0.45; p < 0.001, for which the slope presented a value of 0.21.","PeriodicalId":11497,"journal":{"name":"Ecotoxicology","volume":" ","pages":"425-439"},"PeriodicalIF":2.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140849346","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: Mercury bioaccumulation in bats in Madre de Dios, Peru: implications for Hg bioindicators for tropical ecosystems impacted by artisanal and small-scale gold mining. 更正：秘鲁马德雷德迪奥斯蝙蝠体内的汞生物累积：受手工和小规模采金业影响的热带生态系统汞生物指标的意义。

IF 2.4 4区环境科学与生态学

Ecotoxicology Pub Date : 2024-07-01 DOI: 10.1007/s10646-023-02727-7

Alejandro Portillo, Claudia M Vega, Jose Luis Mena, Emilio Bonifaz, Cesar Ascorra, Miles R Silman, Luis E Fernandez

引用次数: 0