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Hornberger MI. A biodynamic model predicting copper and cadmium bioaccumulation in caddisflies: Linkages between field studies and laboratory exposures. PLoS One 2024; 19:e0297801. [PMID: 38386678 PMCID: PMC10883540 DOI: 10.1371/journal.pone.0297801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/12/2024] [Indexed: 02/24/2024] Open
Abstract
Hydropsyche and Arctopsyche are filter-feeding caddisflies (Order: Trichoptera; Family: Hydropsychidae) that are commonly used to monitor metal exposures in rivers. While tissue residue concentrations provide important bioaccumulation data regarding metal bioavailability, they do not provide information regarding the mechanisms of uptake and loss, or exposure history. This study examined the physiological processes that control Cu and Cd uptake and loss using a biokinetic bioaccumulation model. Larvae of each taxon were experimentally exposed to either water or food enriched with stable isotopes (65Cu and 106Cd). Dissolved Cu uptake (ku) was similar between species (2.6-3.4 L-1g 1d-1), but Cd uptake was 3-fold higher in Hydropsyche than Arctopsyche (1.85 L-1g 1d-1 and 0.60 L-1g 1d-1, respectively). Cu and Cd efflux rates (ke) were relatively fast (0.14 d-1-0.24 d-1) in both species, and may explain, in part, their metal tolerance to mine-impacted rivers. Food ingestion rates (IR), assimilation efficiency (AE) of 65Cu and 106Cd from laboratory diets were also derived and used in a biodynamic model to quantify the relative contribution of dissolved and dietary exposure routes. Results from the biodynamic model were compared to tissue concentrations observed in a long-term field study and indicated that because dissolved Cu and Cd exposures accounted for less than 20% of body concentrations of either taxon, dietary exposure was the predominant metal pathway. An estimation of exposure history was determined using the model to predict steady state concentrations. Under constant exposure conditions (dissolved plus diet), steady state concentrations were reached in less than 30 days, an outcome largely influenced by rapid efflux (ke).
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Cai M, Ma T, Que H, Shi B, Liu X, Ke Y. Investigating the Impact of Humic Acid on Copper Accumulation in Sinonovacula constricta Using a Toxicokinetic-Toxicodynamic Model. TOXICS 2024; 12:74. [PMID: 38251028 PMCID: PMC11154395 DOI: 10.3390/toxics12010074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 01/23/2024]
Abstract
In aquatic ecosystems, the interaction between heavy metals and dissolved organic carbon (DOC) plays a pivotal role in modifying the bioavailability of these metals. This study, employing a toxicokinetic-toxicodynamic model, delves into the interactive effects of humic acid (HA), a significant component of DOC, on the bioaccumulation and toxicity of copper (Cu) in the estuarine economic bivalve Sinonovacula constricta. Utilizing the stable isotope 65Cu as a tracer, we evaluated Cu uptake in S. constricta under varied DOC concentrations in a controlled laboratory setting. Our findings reveal that at DOC concentrations below 3.05 mg L-1, the bioavailability of Cu is reduced due to shifts in the speciation distribution of Cu, resulting in decreased bioaccumulation within S. constricta. Conversely, at DOC levels exceeding 3.05 mg L-1, the formation of colloidal Cu-HA complexes allows its entry into the bivalves' digestive system. Moreover, toxicity assays demonstrate an increase in S. constricta survival rates with higher DOC concentrations, suggesting a protective effect of DOC against Cu toxicity. The integration of accumulation and toxicity data infers that Cu-HA complexes, when ingested via the digestive tract, exhibit lower toxicity compared to Cu directly assimilated from the water phase. These findings emphasize the need to consider environmental DOC levels in assessing Cu pollution risks and provide insights for managing heavy metal toxicity in estuarine aquaculture.
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Affiliation(s)
- Mingyi Cai
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen 361102, China; (M.C.); (T.M.); (H.Q.); (B.S.); (X.L.)
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361102, China
| | - Tian Ma
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen 361102, China; (M.C.); (T.M.); (H.Q.); (B.S.); (X.L.)
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361102, China
| | - Huayong Que
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen 361102, China; (M.C.); (T.M.); (H.Q.); (B.S.); (X.L.)
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361102, China
| | - Bo Shi
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen 361102, China; (M.C.); (T.M.); (H.Q.); (B.S.); (X.L.)
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361102, China
| | - Xiande Liu
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen 361102, China; (M.C.); (T.M.); (H.Q.); (B.S.); (X.L.)
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361102, China
| | - Yizhou Ke
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen 361102, China; (M.C.); (T.M.); (H.Q.); (B.S.); (X.L.)
- State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, Xiamen 361102, China
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Li Y, Chen F, Zhou R, Zheng X, Pan K, Qiu G, Wu Z, Chen S, Wang D. A review of metal contamination in seagrasses with an emphasis on metal kinetics and detoxification. JOURNAL OF HAZARDOUS MATERIALS 2023; 454:131500. [PMID: 37116329 DOI: 10.1016/j.jhazmat.2023.131500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/22/2023] [Accepted: 04/24/2023] [Indexed: 05/19/2023]
Abstract
Seagrasses are important foundation species in coastal ecosystems, and they provide food and habitat that supports high biodiversity. However, seagrasses are increasingly subjected to anthropogenic disturbances such as metal pollution, which has been implicated as a significant factor driving seagrass losses. There have been several reviews synthesizing the metal concentrations in seagrasses and evaluating their utility as biomonitors for metal pollution in the coastal environment at the local scale. However, the interpretation of metal data in seagrass biomonitors requires a more mechanistic understanding of the processes governing metal bioaccumulation and detoxification. In this review, the progress and trends in metal studies in seagrasses between 1973 and 2022 were analyzed to identify frontier topics in this field. In addition, we tried to (1) analyze and assess the current status of metal contamination in seagrasses on a global scale by incorporating more metal data from tropical and Indo-Pacific seagrasses, (2) summarize the geochemical and biological factors governing metal uptake and loss in seagrasses, and (3) provide an up-to-date understanding of metals' effects on seagrasses and their physiological responses to metal challenges. This review improves our understanding of the highly variable metal concentrations observed in the field.
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Affiliation(s)
- Yanping Li
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060 Guangdong Province, China
| | - Fengyuan Chen
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060 Guangdong Province, China
| | - Ruojing Zhou
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060 Guangdong Province, China
| | - Xinqing Zheng
- Key Laboratory of Marine Ecology Conservation and Restoration, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Ke Pan
- Shenzhen Key Laboratory of Marine Microbiome Engineering, Institute for Advanced Study, Shenzhen University, Shenzhen 518060 Guangdong Province, China
| | - Guanglong Qiu
- Guangxi Mangrove Research Center, Guangxi Academy of Sciences, Beihai 536007, China
| | - Zhongjie Wu
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570125, China
| | - Shiquan Chen
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570125, China.
| | - Daoru Wang
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570125, China.
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Li Z, He X, Feng C. A review of freshwater benthic clams (Corbicula fluminea): Accumulation capacity, underlying physiological mechanisms and environmental applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159431. [PMID: 36244478 DOI: 10.1016/j.scitotenv.2022.159431] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/23/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Asian clams (Corbicula fluminea) have been extensively applied in biomonitoring and other environmental fields based on their high enrichment capacity and rapid response to pollutants. This review first summarizes the kinetic process of metals and organic pollutants enriched by C. fluminea and discusses the environmental behavior and application. The accumulation ability of Cu, Zn, and Mn were significantly higher than that of other metals, which were attributed to their high uptake rate constant and low elimination rate constant. The visceral mass was found to be the major burden tissue. However, large knowledge gaps existed regarding the accumulation capacity of C. fluminea for organic pollutants and nanoparticles. Moreover, physiological mechanisms underlying the accumulation of environmental pollutants were proposed. C. fluminea can improve the niche of benthic algae by ingesting pelagic algae, mitigating water eutrophication. It can also remove pathogens and parasites based on the biological assimilation of nonspecific immunity, interrupting disease transmission. The novel insight into the application of C. fluminea in wastewater treatment further broadens the range of pest management strategies and offers the feasibility of blocking the spread of invasive bivalves.
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Affiliation(s)
- Zhenling Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Xiaokang He
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China
| | - Chenghong Feng
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China; The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China.
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Crémazy A, Braz-Mota S, Brix KV, Duarte RM, Val AL, Wood CM. Investigating the mechanisms of dissolved organic matter protection against copper toxicity in fish of Amazon's black waters. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 843:157032. [PMID: 35779728 DOI: 10.1016/j.scitotenv.2022.157032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/24/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
We investigated how natural dissolved organic matter (DOM) of the Rio Negro (Amazon) affects acute copper (Cu) toxicity to local fish: the cardinal tetra (Paracheirodon axelrodi) and the dwarf cichlid (Apistogramma agassizii). It is established that Cu2+ complexation with DOM decreases Cu bioavailability (and thus toxicity) to aquatic organisms, as conceptualized by the Biotic Ligand Model (BLM). However, we also know that Rio Negro's DOM can interact with fish gills and have a beneficial effect on Na+ homeostasis, the main target of acute Cu toxicity in freshwater animals. We aimed to tease apart these potential protective effects of DOM against Cu-induced Na+ imbalances in fish. In the laboratory, we acclimated fish to Rio Negro water (10 mg L-1 DOC) and to a low-DOM water (1.4 mg L-1 DOC) with similar ion composition and pH (5.9). We measured 3-h Cu uptake in gills and unidirectional and net Na+ physiological fluxes across a range of Cu concentrations in both waters. Various DOM pre-acclimation times (0, 1 and 5 days) were evaluated in experiments with P. axelrodi. Copper exposure led to similar levels of net Na+ loss in the two fish, but with distinct effects on Na+ influx and efflux rates reflecting their different ionoregulation strategies. Rio Negro DOM protected against Cu uptake and toxicity in the two fish species. Both Cu uptake in fish gills and Na+ regulation disturbances were relatively well predicted by the modelled aqueous free Cu2+ ion concentration. These findings suggest that protection by DOM occurs mainly from Cu complexation under the tested conditions. The prevalence of this geochemical-type protection over a physiological-type protection agrees with the BLM conceptual framework, supporting the use of the BLM to assess the risk of Cu in these Amazonian waters.
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Affiliation(s)
- Anne Crémazy
- Institut National de la Recherche Scientifique, Centre Eau Terre Environnement, Quebec City, QC G1K 9A9, Canada.
| | - Susana Braz-Mota
- Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Research of the Amazon (INPA), Manaus, AM 69067-375, Brazil
| | - Kevin V Brix
- EcoTox LLC, Miami, FL, United States; University of Miami, RSMAS, Miami, FL, United States
| | - Rafael M Duarte
- Biosciences Institute, São Paulo State University - UNESP, Coastal Campus, São Vicente, SP, Brazil
| | - Adalberto L Val
- Laboratory of Ecophysiology and Molecular Evolution, Brazilian National Institute for Research of the Amazon (INPA), Manaus, AM 69067-375, Brazil
| | - Chris M Wood
- Department of Zoology, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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Aharchaou I, Maul A, Pons MN, Pauly D, Poirot H, Flayac J, Rodius F, Rousselle P, Beuret M, Battaglia E, Vignati DAL. Effects and bioaccumulation of Cr(III), Cr(VI) and their mixture in the freshwater mussel Corbicula fluminea. CHEMOSPHERE 2022; 297:134090. [PMID: 35216982 DOI: 10.1016/j.chemosphere.2022.134090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 02/09/2022] [Accepted: 02/21/2022] [Indexed: 06/14/2023]
Abstract
Chromium has two main oxidation states, Cr(III) and Cr(VI), that can occur simultaneously in natural waters. Current consensus holds that Cr(VI) is of high ecotoxicological concern, but regards Cr(III) as poorly bioavailable and relatively non-toxic. In this work, the effects and bioaccumulation of Cr(III), Cr(VI) and their mixture were studied using the freshwater clam Corbicula fluminea as a model organism. Mixture exposures were carried out using solutions isotopically enriched in 50Cr(III) or 53Cr(VI), allowing to quantify the contribution of each redox form to total Cr accumulation in the clams. Following exposure to individual redox forms, Cr(III) accumulated preferentially in the digestive glands and Cr(VI) in the gills of C. fluminea. In mixture exposures, both redox forms accumulated mainly in the gills; the concentration of Cr(III) in the digestive glands being much lowered compared with individual exposures. Both oxidation states affected the expression of biomarkers related to energy reserves, cellular damage and mitochondrial functioning, as well as the expression of mRNA for detoxification genes. The observed effects differed between gills and digestive glands. The present study suggests that Cr(III) is a bioavailable and biologically active elemental species deserving more consideration by the ecotoxicological community.
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Affiliation(s)
- Imad Aharchaou
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France
| | - Armand Maul
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France
| | | | - Danièle Pauly
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France; Pôle de Compétences en Biologie Environnementale, ANATELo, Université de Lorraine, F-57000, Metz, France
| | - Hélène Poirot
- Université de Lorraine, CNRS, LRGP, F-54000, Nancy, France
| | - Justine Flayac
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France; Pôle de Compétences en Biologie Environnementale, ANATELo, Université de Lorraine, F-57000, Metz, France
| | | | - Philippe Rousselle
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France; Pôle de Compétences en Chimie Analytique Environnementale, ANATELo, Université de Lorraine, F-57000 Metz, France
| | - Maximilien Beuret
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France; Pôle de Compétences en Chimie Analytique Environnementale, ANATELo, Université de Lorraine, F-57000 Metz, France
| | - Eric Battaglia
- Université de Lorraine, CNRS, LIEC, F-57000, Metz, France
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Thit A, Sandgaard MH, Sturve J, Mouneyrac C, Baun A, Selck H. Influence of Aging on Bioaccumulation and Toxicity of Copper Oxide Nanoparticles and Dissolved Copper in the Sediment-Dwelling Oligochaete Tubifex tubifex: A Long-Term Study Using a Stable Copper Isotope. FRONTIERS IN TOXICOLOGY 2022; 3:737158. [PMID: 35295142 PMCID: PMC8915916 DOI: 10.3389/ftox.2021.737158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022] Open
Abstract
For engineered metal nanoparticles (NPs), such as copper oxide (CuO) NPs, the sediment is recognized as a major compartment for NP accumulation. Sediment-dwelling organisms, such as the worm Tubifex tubifex, will be at particular risk of metal and metal NP exposure. However, a range of complex transformation processes in the sediment affects NP bioavailability and toxicity as the contamination ages. The objective of this study was to examine bioaccumulation and adverse effects of CuO NPs in T. tubifex compared to dissolved Cu (administered as CuCl2) and the influence of aging of spiked sediment. This was done in a 28-day exposure experiment with T. tubifex incubated in clean sediment or freshly spiked sediment with different concentrations of dissolved Cu (up to 230 μg g−1 dw) or CuO NPs (up to 40 μg g−1 dw). The experiment was repeated with the same sediments after it had been aged for 2 years. To obtain a distinct isotopic signature compared to background Cu, both Cu forms were based on the stable isotope 65Cu (>99%). The 28-day exposure to sediment-associated dissolved 65Cu and 65CuO NPs resulted in a clear concentration-dependent increase in the T. tubifex65Cu body burden. However, despite the elevated 65Cu body burdens in exposed worms, limited adverse effects were observed in either of the two experiments (e.g., above 80% survival in all treatments, low or no effects on the growth rate, feeding rate, and reproduction). Organisms exposed to aged sediments had lower body burdens of 65Cu than those exposed to freshly spiked sediments and we suggest that aging decreases the bioavailability of both 65Cu forms. In this study, the use of a stable isotope made it possible to use environmentally realistic Cu concentrations and, at the same time, differentiate between newly accumulated 65Cu and background Cu in experimental samples despite the high background Cu concentrations in sediment and T. tubifex tissue. Realistic exposure concentrations and aging of NPs should preferably be included in future studies to increase environmental realism to accurately predict the environmental risk of metal NPs.
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Affiliation(s)
- Amalie Thit
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | | | - Joachim Sturve
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Catherine Mouneyrac
- Faculty of Sciences, BIOSSE, Université Catholique de L'Ouest, Angers, France
| | - Anders Baun
- Department of Environmental Engineering, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Henriette Selck
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
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Lesser E, Sheikh FN, Sikder M, Croteau MN, Franklin N, Baalousha M, Ismail NS. Water Chemistry, Exposure Routes, and Metal Forms Determine the Bioaccumulation Dynamics of Silver (Ionic and Nanoparticulate) in Daphnia magna. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:726-738. [PMID: 34913522 DOI: 10.1002/etc.5271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 12/07/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
Treatment wetlands utilize various physical and biological processes to reduce levels of organic contaminants, metals, bacteria, and suspended solids. Silver nanoparticles (AgNPs) are one type of contaminant that can enter treatment wetlands and impact the overall treatment efficacy. Grazing by filter-feeding zooplankton, such as Daphnia magna, is critical to treatment wetland functioning; but the effects of AgNPs on zooplankton are not fully understood, especially at environmentally relevant concentrations. We characterized the bioaccumulation kinetics of dissolved and nanoparticulate (citrate-coated) 109 Ag in D. magna exposed to environmentally relevant 109 Ag concentrations (i.e., 0.2-23 nmol L-1 Ag) using a stable isotope as a tracer of Ag. Both aqueous and nanoparticulate forms of 109 Ag were bioavailable to D. magna after exposure. Water chemistry affected 109 Ag influx from 109 AgNP but not from 109 AgNO3 . Silver retention was greater for citrate-coated 109 AgNP than dissolved 109 Ag, indicating a greater potential for bioaccumulation from nanoparticulate Ag. Feeding inhibition was observed at higher dietary 109 Ag concentrations, which could lead to reduced treatment wetland performance. Our results illustrate the importance of using environmentally relevant concentrations and media compositions when predicting Ag bioaccumulation and provide insight into potential effects on filter feeders critical to the function of treatment wetlands. Environ Toxicol Chem 2022;41:726-738. © 2021 SETAC.
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Affiliation(s)
- Emma Lesser
- Picker Engineering Program, Smith College, Northampton, Massachusetts, USA
| | - Fatima Noor Sheikh
- Picker Engineering Program, Smith College, Northampton, Massachusetts, USA
| | - Mithun Sikder
- Picker Engineering Program, Smith College, Northampton, Massachusetts, USA
| | | | | | - Mohammed Baalousha
- Center for Environmental Nanoscience and Risk, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina, USA
| | - Niveen S Ismail
- Picker Engineering Program, Smith College, Northampton, Massachusetts, USA
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Zeng H, Zhang P, Ye H, Ji Y, Hogstrand C, Green I, Xiao J, Fu Q, Guo Z. Waterborne zinc bioaccumulation influences glucose metabolism in orange-spotted grouper embryos. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 283:117325. [PMID: 34030065 DOI: 10.1016/j.envpol.2021.117325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/01/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
Fish embryos, as an endogenous system, strictly regulate an energy metabolism that is particularly sensitive to environmental pressure. This study used orange-spotted grouper embryos and stable isotope 67Zn to test the hypothesis that waterborne Zn exposure had a significant effect on energy metabolism in embryos. The fish embryos were exposed to a gradient level of waterborne 67Zn, and then sampled to quantify 67Zn bioaccumulation and mRNA expressions of key genes involved glucose metabolism. The results indicated that the bioaccumulated 67Zn generally increased with increasing waterborne 67Zn concentrations, while it tended to be saturated at waterborne 67Zn > 0.7 mg L-1. As we hypothesized, the expression of PK and PFK gene involved glycolysis pathway was significantly up-regulated under waterborne 67Zn exposure >4 mg L-1. Waterborne 67Zn exposure >2 mg L-1 significantly suppressed PCK and G6PC gene expression involved gluconeogenesis pathway, and also inhibited the AKT2, GSK-3beta and GLUT4 genes involved Akt signaling pathway. Our findings first characterized developmental stage-dependent Zn uptake and genotoxicity in fish embryos. We suggest fish embryos, as a small-scale modeling biosystem, have a large potential and wide applicability for determining cytotoxicity/genotoxicity of waterborne metal in aquatic ecosystem.
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Affiliation(s)
- Huiling Zeng
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Peifeng Zhang
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Hengzhen Ye
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Yuxiang Ji
- School of Tropical Medicine and Laboratory Medicine, Hainan Medical University, Haikou, Hainan, 571199, China
| | - Christer Hogstrand
- Metals Metabolism Group, School of Life Course Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Iain Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, Dorset, BH12 5BB, UK
| | - Juan Xiao
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, 570228, China
| | - Qiongyao Fu
- School of Tropical Medicine and Laboratory Medicine, Hainan Medical University, Haikou, Hainan, 571199, China
| | - Zhiqiang Guo
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Life and Pharmaceutical Sciences, College of Food Science and Engineering, Hainan University, Haikou, 570228, China.
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Lin Z, Xu X, Xie M, Chen R, Tan QG. Measuring Metal Uptake and Loss in Individual Organisms: A Novel Double Stable Isotope Method and its Application in Explaining Body Size Effects on Cadmium Concentration in Mussels. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:9979-9988. [PMID: 34191494 DOI: 10.1021/acs.est.1c01582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Interindividual variabilities in metal bioaccumulation confound our interpretation of the biomonitoring data. Measuring metal toxicokinetics in organism "individuals" may provide insights into the processes underlying the variabilities. Therefore, we developed a double stable isotope method that can simultaneously measure uptake and elimination of metals in individual organisms and thus the distribution of the toxicokinetic parameters. Specifically, we exposed organisms to both isotopes (113Cd and 114Cd; Cd = cadmium) during the first stage and to only one isotope (114Cd) during the second stage. Metal uptake and elimination rate constants (i.e., ku and ke) were simultaneously estimated from the content of the two isotopes measured in each organism at the end of the second stage. We applied the method to investigate the interindividual variability in Cd concentrations caused by body size in two marine mussel species. Cd concentrations are higher in larger Xenostrobus atratus but lower in smaller Perna viridis. Size-dependent Cd uptake is found to be responsible for size effects on Cd concentrations in the mussels and the interspecies differences in the relationship between Cd concentration and body size. Specifically, Cd ku increases with size in X. atratus (0.057-0.297 L g-1 d-1) but decreases with size in P. viridis (0.155-0.351 L g-1 d-1). In contrast, Cd ke is not influenced by body size (X. atratus: 0.002-0.060 d-1; P. viridis: 0.008-0.060 d-1). Overall, we extended the applicability of the stable isotope methods to measure metal toxicokinetics in "individual" organisms, providing a readily available tool for investigating problems related to metal bioaccumulation.
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Affiliation(s)
- Zhi Lin
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
| | - Xinyi Xu
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
| | - Minwei Xie
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
- Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, China
| | - Rong Chen
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
- Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, China
| | - Qiao-Guo Tan
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
- Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, China
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11
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Thit A, Selck H. Biodynamics and adverse effects of CuO nanoparticles and CuCl 2 in the oligochaete T. tubifex: Cu form influence biodynamics in water, but not sediment. Nanotoxicology 2021; 15:673-689. [PMID: 34137642 DOI: 10.1080/17435390.2021.1913657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The use of copper oxide (CuO) NPs results in the release of these particles into the aquatic environment. Here, the particles settle out and accumulate in the sediment. However, little is known about the biodynamics of sediment-associated NPs in benthic organisms. We compared the toxicity and biodynamics of CuO NPs (7 nm) and dissolved Cu (CuCl2) in the sediment-dwelling oligochaete, Tubifex tubifex, to gain insights into the relative importance of metal form (CuCl2 vs CuO NPs) and exposure route (water vs sediment). Isotopically enriched 65Cu was used as a tracer to distinguish background from newly accumulated 65Cu in worms. For each exposure route, we conducted three experiments: one uptake, one elimination, and one longer-term net accumulation experiment to parameterize uptake and elimination of 65CuCl2 and 65CuO NPs in T. tubifex. 65Cu accumulation was detected for both 65CuCl2 and 65CuO NPs regardless of whether T. tubifex were exposed in sediment- or water-only setups. Water exposures to 65CuCl2 resulted in tail trauma whereas limited effects were seen for sediment exposures or exposures to 65CuO NPs via either exposure route. Uptake rate constants and accumulation of 65Cu in T. tubifex were higher following 65CuCl2 exposure than 65CuO NPs, in water, but not in sediment. Thus, the relative importance of exposure route and Cu form for uptake dynamics is not straightforward suggesting that findings on bioaccumulation and toxicity in water exposures cannot be directly extrapolated to sediment.
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Affiliation(s)
- Amalie Thit
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
| | - Henriette Selck
- Department of Science and Environment, Roskilde University, Roskilde, Denmark
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12
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Sikder M, Croteau MN, Poulin BA, Baalousha M. Effect of Nanoparticle Size and Natural Organic Matter Composition on the Bioavailability of Polyvinylpyrrolidone-Coated Platinum Nanoparticles to a Model Freshwater Invertebrate. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2452-2461. [PMID: 33529523 DOI: 10.1021/acs.est.0c05985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The bioavailability of dissolved Pt(IV) and polyvinylpyrrolidone-coated platinum nanoparticles (PtNPs) of five different nominal hydrodynamic diameters (20, 30, 50, 75, and 95 nm) was characterized in laboratory experiments using the model freshwater snail Lymnaea stagnalis. Dissolved Pt(IV) and all nanoparticle sizes were bioavailable to L. stagnalis. Platinum bioavailability, inferred from conditional uptake rate constants, was greater for nanoparticulate than dissolved forms and increased with increasing nanoparticle hydrodynamic diameter. The effect of natural organic matter (NOM) composition on PtNP bioavailability was evaluated using six NOM samples at two nanoparticle sizes (20 and 95 nm). NOM suppressed the bioavailability of 95 nm PtNPs in all cases, and DOM reduced sulfur content exhibited a positive correlation with 95 nm PtNP bioavailability. The bioavailability of 20 nm PtNPs was only suppressed by NOM with a low reduced sulfur content. The physiological elimination of Pt accumulated after dissolved Pt(IV) exposure was slow and constant. In contrast, the elimination of Pt accumulated after PtNP exposures exhibited a triphasic pattern likely involving in vivo PtNP dissolution. This work highlights the importance of PtNP size and interfacial interactions with NOM on Pt bioavailability and suggests that in vivo PtNP transformations could yield unexpectedly higher adverse effects to organisms than dissolved exposure alone.
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Affiliation(s)
- Mithun Sikder
- South Carolina SmartState Center for Environmental Nanoscience and Risk (CENR), Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
| | | | - Brett A Poulin
- U.S. Geological Survey, Boulder, CO 80303, United States
- Department of Environmental Toxicology, University of California Davis, Davis, California 95616, United States (current address)
| | - Mohammed Baalousha
- South Carolina SmartState Center for Environmental Nanoscience and Risk (CENR), Department of Environmental Health Sciences, University of South Carolina, Columbia, South Carolina 29208, United States
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13
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Zhong G, Lu S, Chen R, Chen N, Tan QG. Predicting Risks of Cadmium Toxicity in Salinity-Fluctuating Estuarine Waters Using the Toxicokinetic-Toxicodynamic Model. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:13899-13907. [PMID: 33059443 DOI: 10.1021/acs.est.0c06644] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In estuaries, salinity fluctuates rapidly and continuously, greatly affecting the bioavailability and thus toxicity of contaminants, especially metals, causing difficulties in deriving site-specific water quality criteria. We developed a method for predicting the toxicity of the metal cadmium (Cd) in estuarine waters of any salinity fluctuation scenario. Cd bioaccumulation and toxicity were measured in an estuarine clam Potamocorbula laevis under stable salinities (salinity = 5, 15, 25) and fluctuating salinities (5-25), using the toxicokinetic-toxicodynamic (TK-TD) framework. Cd bioaccumulation decreases with increasing salinity; whereas intrinsic Cd sensitivity of organisms reaches the minimum at an intermediate salinity around 20. At each specific Cd level, interpolating TK-TD parameters measured at the stable salinities well predicts the Cd bioaccumulation and toxicity under fluctuating salinities. To extend the model for various Cd levels, the biotic ligand model (BLM) was integrated into the TK-TD framework. The BLM-based TK-TD model was successfully applied to scenarios of simulated and monitored salinity fluctuations in estuarine waters, for which the median lethal concentrations and no-effect concentrations (2.0-3.1 μg L-1) of Cd were derived. Overall, we integrated the BLM and TK-TD models and provided a useful tool for predicting metal risks and deriving criteria values for salinity-fluctuating estuarine waters.
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Affiliation(s)
- Guangbin Zhong
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, P. R. China
| | - Shunhua Lu
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, P. R. China
| | - Rong Chen
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, P. R. China
- Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, P. R. China
| | - Nengwang Chen
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, P. R. China
| | - Qiao-Guo Tan
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, P. R. China
- Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, P. R. China
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14
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Cai C, Wang WX. Inter-species difference of copper accumulation in three species of marine mussels: Implication for biomonitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:1029-1036. [PMID: 31539935 DOI: 10.1016/j.scitotenv.2019.07.298] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/26/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
Marine mussels have been used widely as biomonitors of coastal contamination in many countries. Due to the restrain of their geographical distributions, it is often necessary to employ more than one species of mussels within a large-scale biomonitoring program. In the present study, we compared the differences of copper (Cu) bioaccumulation in three species of marine mussels (green mussel Perna viridis, blue mussel Mytilus edulis, and hard-shelled mussel Mytilus coruscus) widely distributing along the Chinese coastal waters, under identical Cu exposure conditions. Over the 21-days exposure to dissolved Cu, the green mussels and blue mussels exhibited comparable newly accumulated Cu concentrations, possibly due to their comparable Cu uptake rate constant ku (blue mussel, 0.573 L g-1 d-1; green mussel, 0.530 L g-1 d-1) and efflux rate constant ke (blue mussel, 0.053 d-1; green mussel, 0.065 d-1). In contrast, there was no net Cu accumulation in the hard-shell mussels, which may be accounted by the lower ku (0.394 L g-1 d-1) but higher ke (0.081 d-1) than the other two mussel species. Further subcellular distribution analyses showed that the cellular debris and metallothionein-like protein (MTLP) fraction were the key binding sites for Cu, and the MTLP fraction may act as a main contributor in Cu regulation and elimination in the blue mussels and hard-shell mussels. There was no strong evidence that the subcellular partitioning and dynamics of Cu in the mussels were responsible for the difference underlying the Cu accumulation in the three species of mussels. Our comparative study thereby suggested that it may be feasible to directly compare the Cu bioavailability in the green mussels and blue mussels based on their Cu biomonitoring data. Cu biomonitoring data from the hard-shell mussels may underestimate the actual Cu bioavailability of the sampling area given its much stronger regulation of Cu bioaccumulation as compared to the other two mussel species.
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Affiliation(s)
- Chunzhi Cai
- Shenzhen Key Laboratory of Edible and Medicinal Bioresources, HKUST Shenzhen Research Institute, Shenzhen 518057, China; Department of Ocean Science, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Wen-Xiong Wang
- Shenzhen Key Laboratory of Edible and Medicinal Bioresources, HKUST Shenzhen Research Institute, Shenzhen 518057, China; Department of Ocean Science, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China.
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15
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Guo Z, Ni Z, Ye H, Xiao J, Chen L, Green I, Zhang L. Simultaneous uptake of Cd from sediment, water and diet in a demersal marine goby Mugilogobius chulae. JOURNAL OF HAZARDOUS MATERIALS 2019; 364:143-150. [PMID: 30343176 DOI: 10.1016/j.jhazmat.2018.09.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 09/05/2018] [Accepted: 09/14/2018] [Indexed: 06/08/2023]
Abstract
The embryonic state of our knowledge regarding the simultaneous uptake of trace metals via multiple routes in aquatic organisms makes it difficult to accurately assess the bioaccumulation and risk of metals. This study used cadmium (Cd) and a demersal marine fish (the yellowstripe goby) as a model system to determine tissue-specific uptake of Cd under conditions of simultaneous exposure to Cd from water, sediment and diet. A triple stable isotope tracing method was used in which each exposure route was spiked by a different stable isotope (110Cd, 111Cd and 113Cd). The results revealed that the fish took up waterborne and sedimentary Cd via gills and gastrointestinal tract (GT), and that of dietary Cd was via the GT. The gills absorbed Cd predominantly from water (77.2-89.4%) whilst the GT absorbed Cd mainly from diet (81.3-98.7%). In the muscle and carcass, the Cd uptake was mainly from the diet (47.1-80.4%) and water (22.8-51.6%). Our study demonstrated that when aquatic animals were subject to simultaneous exposure through multiple uptake routes, the uptake and relative importance of each route for metal accumulation was highly tissue-specific and more complex than a single route of metal exposure.
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Affiliation(s)
- Zhiqiang Guo
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou, 570228, China; Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou, 510301, China
| | - Zhixin Ni
- South China Sea Environmental Monitoring Center, South Sea Branch of the State Oceanic Administration, Guangzhou, 510300, China
| | - Hengzhen Ye
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou, 570228, China
| | - Juan Xiao
- State Key Laboratory of Marine Resource Utilization in South China Sea, College of Oceanology, Hainan University, Haikou, 570228, China
| | - Lizhao Chen
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou, 510301, China
| | - Iain Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, Dorset, BH12 5BB, UK
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou, 510301, China.
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16
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Zhao L, Liu L. Assessing the impact of lanthanum on the bivalve Corbicula fluminea in the Rhine River. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 640-641:830-839. [PMID: 29879669 DOI: 10.1016/j.scitotenv.2018.05.351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 05/13/2018] [Accepted: 05/28/2018] [Indexed: 06/08/2023]
Abstract
Anthropogenic lanthanum predominantly derived from a point source has become an emerging contaminant in the Rhine River, but little is known about its ecotoxicological consequences on bivalve mollusks. A fundamental requirement of aquatic invertebrate adaptation and survival in stressful habitats is the maintenance of energy homeostasis. As such, the present study tested the impact of four dissolved La concentrations (0, 50, 100 and 200 μM) on the energy balance of the bivalve Corbicula fluminea in the Rhine River. Bivalves were collected at four sampling sites which were contaminated by La to different degrees, thereby allowing to understand the degree of their potential acclimation. With increasing exposure dose, shell and somatic growth (the most energetically expensive biological processes) decreased significantly in clams inhabited the control (uncontaminated) habitat; while less pronounced impacts were evident in all three contaminated sites. In particular, the latter showed virtually unaffected energy (glycogen and protein) reserves. An elucidation of shifts in the organismal energy budget may shed light on such improvement of growth performance. Irrespective of sampling sites, short-term exposure to La caused significant increases of oxygen consumption and ammonia excretion, indicating that the clams promoted their energy metabolism and thereby allocated more energy to essential physiological processes. Noteworthily, the clams originating from contaminated sites displayed virtually unaffected clearance rate, thereby being able to partially fulfill the increased energy demand and eventually alleviating the La-induced physiological interference. Taken together, findings of the present study demonstrate that whether, and to what extent, C. fluminea is able to sustain its energy homeostasis play a central role in the phenotypic plasticity and/or genetic adaptation in the face of anthropogenic La contamination in the Rhine River.
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Affiliation(s)
- Liqiang Zhao
- Institute of Geosciences, University of Mainz, Mainz 55128, Germany; Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan.
| | - Lei Liu
- College of Life Science and Technology, Jinan University, Guangzhou 516032, China
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17
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Wiech M, Amlund H, Jensen KA, Aldenberg T, Duinker A, Maage A. Tracing simultaneous cadmium accumulation from different uptake routes in brown crab Cancer pagurus by the use of stable isotopes. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 201:198-206. [PMID: 29966918 DOI: 10.1016/j.aquatox.2018.05.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/17/2018] [Accepted: 05/23/2018] [Indexed: 06/08/2023]
Abstract
High concentrations of cadmium in brown crab are an issue of food safety, and large variations between different areas have been found. To investigate the relative importance of dietary and aqueous uptake regarding the overall accumulation in brown crab, we used stable isotopes to trace the uptake from both routes simultaneously in the same animals. We demonstrated that the analytical challenges regarding background concentrations of natural isotope distribution and polyatomic interferences in the different matrices can be overcome with an appropriate analytical setup and modern mathematical corrections using a computer software. Cadmium was accumulated via both routes and was found in all measured organs at the end of the exposure phase. The obtained data were used to establish accumulation curves for both uptake routes and estimate accumulation parameters for hepatopancreas, as the most important organ in crab regarding total cadmium body burden. Using the estimated parameters in combination with naturally relevant cadmium concentrations in seawater and diet in a model, allowed us to predict the relative importance of the aqueous and dietary uptake route to the total hepatopancreas burden. According to the prediction, the dietary route is the main route of uptake in brown crab with a minimum of 98% of the accumulated cadmium in hepatopancreas originating from diet. Future studies addressing the source and accumulation of cadmium in crab should therefore focus on the uptake from feed and factors connected to foraging.
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Affiliation(s)
- Martin Wiech
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817 Bergen, Norway; University of Bergen, P.O. Box 7800, NO-5020 Bergen, Norway.
| | - Heidi Amlund
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817 Bergen, Norway.
| | - Karl Andreas Jensen
- Institute of Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Ås, Norway.
| | - Tom Aldenberg
- National Institute for Public Health and The Environment, P.O. Box 1, NL-3720 BA Bilthoven, The Netherlands.
| | - Arne Duinker
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817 Bergen, Norway.
| | - Amund Maage
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817 Bergen, Norway; University of Bergen, P.O. Box 7800, NO-5020 Bergen, Norway.
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18
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Zhou Y, Wei F, Zhang W, Guo Z, Zhang L. Copper bioaccumulation and biokinetic modeling in marine herbivorous fish Siganus oramin. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 196:61-69. [PMID: 29334673 DOI: 10.1016/j.aquatox.2018.01.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/02/2018] [Accepted: 01/09/2018] [Indexed: 06/07/2023]
Abstract
Marine herbivorous fish directly consume macroalgae, which commonly accumulate high levels of trace metals in polluted areas. We proposed that herbivorous fish could be better candidates for biomonitoring marine metal pollution than carnivorous fish. To date, the trophic transfer of Cu from macroalgae to marine herbivorous fish is unclear. In this study, the kinetics of Cu bioaccumulation in a widespread marine herbivorous fish, Siganus oramin, were investigated, and biokinetic modeling was applied to estimate the Cu levels in the fish sampled from different sites and seasons. The results showed that Cu accumulation in the fish was linearly correlated to the dietary Cu levels in the different prey species, which were proportional to the waterborne Cu concentrations. The Cu found in the subcellular trophically available metal fraction (TAM) in the prey contributed the largest proportion of accumulated Cu in S. oramin. The dietary assimilation efficiencies (AEs) of Cu were 15.56 ± 1.76%, 13.42 ± 2.86%, and 21.36 ± 1.47% for Ulva lactuca, Gracilaria lemaneiformis and Gracilaria gigas, respectively. The calculated waterborne uptake rate constant (ku) of Cu was 0.023 ± 0.011 L g-1 d-1, and the efflux rate constant (ke) was 0.055 ± 0.021 d-1. Dietary Cu accounted for 60%-75% of the body Cu in S. oramin, suggesting that dietary uptake could be the primary route for Cu bioaccumulation in herbivorous fish. The biokinetic model demonstrated that the Cu concentrations in the water and fish presented a positive linear relationship, which was in line with our field investigation along the coastal areas of South China. Therefore, we suggested that S. oramin could be used as a biomonitoring organism for Cu pollution in the marine environment. However, the heterogeneities between the predicted levels and the measured levels of Cu implied that seasonal changes should be taken into account to improve the accuracy of the model.
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Affiliation(s)
- Yanyan Zhou
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Fangsan Wei
- Key Laboratory for Exploitation and Utilization of Marine Fisheries Resources in the South China Sea, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China
| | - Wei Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhiqiang Guo
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, China
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
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19
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Chen WQ, Wang WX, Tan QG. Revealing the complex effects of salinity on copper toxicity in an estuarine clam Potamocorbula laevis with a toxicokinetic-toxicodynamic model. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 222:323-330. [PMID: 28024811 DOI: 10.1016/j.envpol.2016.12.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 12/13/2016] [Accepted: 12/15/2016] [Indexed: 06/06/2023]
Abstract
The effects of salinity on metal toxicity are complex: not only affecting metal bioaccumulation, but also altering the physiology and sensitivity of organisms. In this study, we used a toxicokinetic-toxicodynamic (TK-TD) model to separate and quantify the dual effects of salinity on copper (Cu) toxicity in a euryhaline clam Potamocorbula laevis. The toxicokinetics of Cu was determined using the stable isotope 65Cu as a tracer at concentrations (10-500 μg L-1) realistic to contaminated environments and at salinities ranging from 5 to 30. At low Cu concentrations (ca. 10 μg L-1), Cu bioaccumulation decreased monotonically with salinity, and the uptake rate constant (ku, 0.546 L g-1 h-1 to 0.213 L g-1 h-1) fitted well with an empirical equation, ku = 1/(1.35 + 0.116·Salinity), by treating salinity as a pseudo-competitor. The median lethal concentrations (LC50s) of Cu were 269, 224, and 192 μg L-1 at salinity 5, 15, and 30, respectively. At high Cu concentrations (ca. 500 μg L-1), elevating salinity were much less effective in decreasing Cu bioaccumulation; whereas Cu toxicity increased with salinity. The increased toxicity could be explained by the increases in Cu killing rates (kks), which were estimated to be 0.44-2.08 mg μg-1 h-1 and were presumably due to the osmotic stress caused by the deviation from the optimal salinity of the clams. The other toxicodynamic parameter, internal threshold concentration (CIT), ranged from 79 to 133 μg-1 g-1 and showed no clear trend with salinity.
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Affiliation(s)
- Wen-Qian Chen
- Key Laboratory of the Coastal and Wetland Ecosystems of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
| | - Wen-Xiong Wang
- Key Laboratory of the Coastal and Wetland Ecosystems of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China; Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, China; Division of Life Science, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong
| | - Qiao-Guo Tan
- Key Laboratory of the Coastal and Wetland Ecosystems of Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China; Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, Fujian 361102, China.
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20
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Taylor AM, Edge KJ, Ubrihien RP, Maher WA. The freshwater bivalve Corbicula australis as a sentinel species for metal toxicity assessment: An in situ case study integrating chemical and biomarker analyses. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:709-719. [PMID: 27530269 DOI: 10.1002/etc.3582] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 04/04/2016] [Accepted: 08/12/2016] [Indexed: 06/06/2023]
Abstract
A weight of evidence approach in environmental assessment includes the use of biomonitor organisms to measure biologically available contaminant concentrations and lethal and sublethal responses in an exposure, dose, and response framework. Corbicula australis was assessed as a test species for metal toxicity using in situ river sediment exposures at 4 locations in the Molonglo River (New South Wales, Australia), which has a legacy of sediment metal contamination, following 8 decades of mining in its upper reaches. A sediment metal contamination gradient was evident from 12.5 km to 47 km downstream of the mine, as follows: zinc (851-130 mg/kg) > lead (104-7 mg/kg) > copper (31-5 mg/kg) > cadmium (2-0.3 mg/kg). Exposed C. australis accumulated the following metals in tissue: zinc (1358-236 μg/g) > copper (24-20 μg/g) > cadmium (4.7-0.7 μg/g) = lead (4.2-1.8 μg/g). Biomarker responses showed increased sublethal impairment with increased tissue metal concentrations. Total antioxidant capacity was mildly impaired, with corresponding increased lipid peroxidation and lysosomal membrane destabilization at the higher tissue metal concentrations. Corbicula australis proved to be an effective biomonitor organism for sediment metal assessment, as it is able to accumulate metals relative to sediment concentrations and showed a pattern of increased sublethal impairment with increased tissue metal concentration. It is recommended as a suitable species for incorporation into local freshwater monitoring and assessment programs. Environ Toxicol Chem 2017;36:709-719. © 2016 SETAC.
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Affiliation(s)
- Anne M Taylor
- Ecochemistry Laboratory, Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory, Australia
| | - Katelyn J Edge
- New South Wales Office of Environment and Heritage, Lidcombe, New South Wales, Australia
| | - Rodney P Ubrihien
- Ecochemistry Laboratory, Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory, Australia
| | - William A Maher
- Ecochemistry Laboratory, Institute for Applied Ecology, University of Canberra, Canberra, Australian Capital Territory, Australia
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21
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Zhou Y, Zhang W, Guo Z, Zhang L. Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin. CHEMOSPHERE 2017; 168:491-500. [PMID: 27865883 DOI: 10.1016/j.chemosphere.2016.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 10/31/2016] [Accepted: 11/01/2016] [Indexed: 06/06/2023]
Abstract
Marine fish living in estuaries and coastal areas commonly encounter the stress of both salinity and metal pollution. In this study, euryhaline rabbitfish Siganus oramin were exposed to 50 μg L-1 waterborne Cu or 300 μg g-1 dry wt dietary Cu at salinity 33‰, 25‰, 20‰, 10‰, and 5‰ for 30 days. The Cu accumulation in the liver (>20-fold increase) and intestine (>5-fold increase) significantly increased after either waterborne or dietary Cu acclimation. Moreover, Cu accumulation was further enhanced in the liver, intestine, plasma, and whole body of Cu-exposed fish at lower salinities. Similarly, the waterborne Cu uptake rate constants (kus) were stable in the control at different salinities but increased significantly (2-4 times higher) after waterborne Cu exposure. Conversely, the dietary Cu assimilation efficiencies (AEs) were significantly lower in the dietary Cu-exposed fish (3-5%) than in the control fish (8-16%) at different salinities, suggesting that dietary Cu acclimation partially alleviated the dietary Cu uptake from the high-Cu diet. The Cu efflux rate constants (kes) were comparable among all treatments as 0.060-0.071 d-1. The changes of Cu accumulation by different salinities and Cu exposure were well estimated by the biokinetic modeling. In summary, the present study indicates that rabbitfish can regulate Cu uptake and accumulation when acclimated to different salinities, but the Cu-exposed rabbitfish failed to prevent the elevation of Cu accumulation at low salinities. It therefore suggested that the concurrence of low salinity and high Cu exposure enhances the risks of Cu bioaccumulation and toxicity in rabbitfish.
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Affiliation(s)
- Yanyan Zhou
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wei Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhiqiang Guo
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
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Thit A, Ramskov T, Croteau MN, Selck H. Biodynamics of copper oxide nanoparticles and copper ions in an oligochaete - Part II: Subcellular distribution following sediment exposure. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 180:25-35. [PMID: 27640154 DOI: 10.1016/j.aquatox.2016.08.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 08/05/2016] [Accepted: 08/14/2016] [Indexed: 06/06/2023]
Abstract
The use and likely incidental release of metal nanoparticles (NPs) is steadily increasing. Despite the increasing amount of published literature on metal NP toxicity in the aquatic environment, very little is known about the biological fate of NPs after sediment exposures. Here, we compare the bioavailability and subcellular distribution of copper oxide (CuO) NPs and aqueous Cu (Cu-Aq) in the sediment-dwelling worm Lumbriculus variegatus. Ten days (d) sediment exposure resulted in marginal Cu bioaccumulation in L. variegatus for both forms of Cu. Bioaccumulation was detected because isotopically enriched 65Cu was used as a tracer. Neither burrowing behavior or survival was affected by the exposure. Once incorporated into tissue, Cu loss was negligible over 10 d of elimination in clean sediment (Cu elimination rate constants were not different from zero). With the exception of day 10, differences in bioaccumulation and subcellular distribution between Cu forms were either not detectable or marginal. After 10 d of exposure to Cu-Aq, the accumulated Cu was primarily partitioned in the subcellular fraction containing metallothionein-like proteins (MTLP, ≈40%) and cellular debris (CD, ≈30%). Cu concentrations in these fractions were significantly higher than in controls. For worms exposed to CuO NPs for 10 d, most of the accumulated Cu was partitioned in the CD fraction (≈40%), which was the only subcellular fraction where the Cu concentration was significantly higher than for the control group. Our results indicate that L. variegatus handle the two Cu forms differently. However, longer-term exposures are suggested in order to clearly highlight differences in the subcellular distribution of these two Cu forms.
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Affiliation(s)
- Amalie Thit
- U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States; Department of Science and Environment, Roskilde University, Universitetsvej 1, Roskilde DK-4000, Denmark.
| | - Tina Ramskov
- U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States; Department of Science and Environment, Roskilde University, Universitetsvej 1, Roskilde DK-4000, Denmark.
| | - Marie-Noële Croteau
- Department of Science and Environment, Roskilde University, Universitetsvej 1, Roskilde DK-4000, Denmark.
| | - Henriette Selck
- U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States; Department of Science and Environment, Roskilde University, Universitetsvej 1, Roskilde DK-4000, Denmark
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23
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Lewis A, King CK, Hill NA, Cooper A, Townsend AT, Mondon JA. Seawater temperature effect on metal accumulation and toxicity in the subantarctic Macquarie Island isopod, Exosphaeroma gigas. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 177:333-342. [PMID: 27367827 DOI: 10.1016/j.aquatox.2016.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 06/05/2016] [Accepted: 06/07/2016] [Indexed: 06/06/2023]
Abstract
Very little is currently known of subantarctic nearshore invertebrates' sensitivity to environmental metals and the role of temperature in this relationship. This study investigated Cu and Zn toxicity in the common subantarctic intertidal isopod, Exosphaeroma gigas, and the influence of temperature on Cu toxicity and bioaccumulation kinetics. Adult E. gigas are insensitive to Cu and Zn at concentrations of 3200 and 7400μg/L respectively in non-renewal tests at 5.5°C (ambient subtidal temperature) over 14days. Under renewed exposures over the same temperature and time period the LC50 for copper was 2204μg/L. A 10-fold increase in Cu body burden occurred relative to zinc, indicating E. gigas has different strategies for regulating the two metals. Copper toxicity and time to mortality both increased with elevated temperature. However, temperature did not significantly affect Cu uptake rate and efflux rate constants derived from biodynamic modelling at lower Cu concentrations. These results may be attributable to E. gigas being an intertidal species with physiological mechanisms adapted to fluctuating environmental conditions. Cu concentrations required to elicit a toxicity response indicates that E. gigas would not be directly threatened by current levels of Cu or Zn present in Macquarie Island intertidal habitats, with the associated elevated temperature fluctuations. This study provides evidence that the sensitivity of this subantarctic intertidal species to metal contaminants is not as high as expected, and which has significance for the derivation of relevant guidelines specific to this distinct subpolar region of the world.
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Affiliation(s)
- Alexander Lewis
- Deakin University, Geelong, Centre for Integrative Ecology, P.O. Box 432, Warrnambool, Victoria 3280, Australia
| | - Catherine K King
- Antarctic Conservation and Management, Australian Antarctic Division, 203 Channel Highway, Kingston, Tasmania 7050, Australia
| | - Nicole A Hill
- Institute for Marine and Antarctic Studies, University of Tasmania, 20 Castray Esplanade, Battery Point, Tasmania 7004, Australia
| | - Ashley Cooper
- Antarctic Conservation and Management, Australian Antarctic Division, 203 Channel Highway, Kingston, Tasmania 7050, Australia
| | - Ashley T Townsend
- Central Science Laboratory, University of Tasmania, Private Bag 74, Hobart, Tasmania, 7001 Australia
| | - Julie A Mondon
- Deakin University, Geelong, Centre for Integrative Ecology, P.O. Box 432, Warrnambool, Victoria 3280, Australia.
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Bonnail E, Sarmiento AM, DelValls TA, Nieto JM, Riba I. Assessment of metal contamination, bioavailability, toxicity and bioaccumulation in extreme metallic environments (Iberian Pyrite Belt) using Corbicula fluminea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 544:1031-1044. [PMID: 26774961 DOI: 10.1016/j.scitotenv.2015.11.131] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/24/2015] [Accepted: 11/24/2015] [Indexed: 06/05/2023]
Abstract
The Iberian Pyrite Belt (SW Iberian Peninsula) has intense mining activity. Currently, its fluvial networks receive extremely acid lixiviate residue discharges that are rich in sulphates and metals in solution (acid mine drainage, AMD) from abandoned mines. In the current study, the sediment and water quality were analysed in three different areas of the Odiel River to assess the risk associated with the metal content and its speciation and bioavailability. Furthermore, sediment contact bioassays were performed using the freshwater clam Corbicula fluminea to determine its adequacy as a biomonitoring tool in relation to theoretical risk indexes and regulatory thresholds. Reburial activity and mortality were used as the toxic responses of clams when exposed to contaminated sediment. The results showed coherence between the water and sediment chemical contamination for most of the metals. The reburial activity was correlated with the metal toxicity, but no clam mortality was registered. The bioaccumulation of the studied metals in the clam did not have a significant correlation with the bioavailable fraction of the metal content in the environment, which could be related to a potential different speciation in this singular environment. The bioaccumulation responses were negative for As, Cd and Zn in highly contaminated environments and were characterized as severe, considerable and low potential environmental risks, respectively. The results show that C. fluminea is a good biomonitor of Cu and Pb.
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Affiliation(s)
- E Bonnail
- UNESCO UNITWIN/WiCop, Department of Physical-Chemistry, Faculty of Marine and Environmental Sciences, University of Cádiz, Campus Río San Pedro, 11510 Puerto Real, Cádiz, Spain.
| | - A M Sarmiento
- Department of Geodynamics and Palaeontology, Faculty of Experimental Sciences, University of Huelva, Campus 'El Carmen', 21071 Huelva, Spain
| | - T A DelValls
- UNESCO UNITWIN/WiCop, Department of Physical-Chemistry, Faculty of Marine and Environmental Sciences, University of Cádiz, Campus Río San Pedro, 11510 Puerto Real, Cádiz, Spain
| | - J M Nieto
- Department of Geology, Faculty of Experimental Sciences, University of Huelva, Campus 'El Carmen', 21071 Huelva, Spain
| | - I Riba
- UNESCO UNITWIN/WiCop, Department of Physical-Chemistry, Faculty of Marine and Environmental Sciences, University of Cádiz, Campus Río San Pedro, 11510 Puerto Real, Cádiz, Spain
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25
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Guo Z, Zhang W, Du S, Green I, Tan Q, Zhang L. Developmental patterns of copper bioaccumulation in a marine fish model Oryzias melastigma. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 170:216-222. [PMID: 26675367 DOI: 10.1016/j.aquatox.2015.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 11/24/2015] [Accepted: 11/26/2015] [Indexed: 05/09/2023]
Abstract
Allometry is known to be an important factor influencing metal bioaccumulation in animals. However, it is not clear whether effects are due to body size per se or changes in physiological traits during the animals' development. We therefore investigated the biokinetics of copper (Cu) and predicted Cu bioaccumulation during the development of a fish model, the marine medaka. The results revealed that the waterborne Cu uptake rate constant decreased and dietary Cu assimilation efficiency increased during development from larvae to adults. Thus, the allometric dependency of the biokinetic parameters in juveniles and adults can not be simply extrapolated to the whole life cycle. The body Cu concentration in the fish was predicted by the biokinetic model, which showed a rapid increase in the larval stage, followed by a slight increase from juveniles to adults, and then a relatively stable plateau in the post-adult stage. Dietary Cu uptake became more important as fish developed from larvae to juveniles, but became less important from juveniles to adults. These findings suggested that the developmental patterns of metal bioaccumulation are driven by an integrated biological/physiological shift through animals' ontogeny rather than a simple allometric dependent change. The developmental changes of metal uptake should be considered in ecological bioassessment and biomonitoring programs.
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Affiliation(s)
- Zhiqiang Guo
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou 510301, China; Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, Dorset, BH12 5BB, UK
| | - Wei Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou 510301, China
| | - Sen Du
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou 510301, China
| | - Iain Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, Dorset, BH12 5BB, UK
| | - Qiaoguo Tan
- Key Laboratory of the Coastal and Wetland Ecosystems, Ministry of Education, College of Environment and Ecology, Xiamen University, Xiamen, Fujian 361102, China
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou 510301, China.
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26
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Guo Z, Zhang W, Du S, Zhou Y, Gao N, Zhang L, Green I. Feeding reduces waterborne Cu bioaccumulation in a marine rabbitfish Siganus oramin. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 208:580-589. [PMID: 26552536 DOI: 10.1016/j.envpol.2015.10.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/20/2015] [Accepted: 10/20/2015] [Indexed: 06/05/2023]
Abstract
Waterborne metal uptake has been extensively studied and dietary metal assimilation is increasingly recognized in fish, whilst the interaction between the two uptake routes is largely overlooked. This study compared the waterborne Cu bioaccumulation ((65)Cu as tracer) in a juvenile rabbitfish at different feeding regimes (starvation (SG), feeding normal diet (NDG) or diet supplemented with extra Cu (DCG)) to test the hypothesis that feeding can influence waterborne metal uptake in marine fish. NDG and DCG diet was fed as a single meal and then all fish were exposed to waterborne (65)Cu for 48 h, during which the time course sampling was conducted to determine (65)Cu bioaccumulation, chyme flow and dietary Cu assimilation. The results revealed that SG fish accumulated the highest (65)Cu, followed by NDG (61% of SG), whilst DCG fish accumulated the lowest (65)Cu (34% of SG). These results suggested a protective effect of feeding against waterborne Cu bioaccumulation. This effect was most notable between 10 min and 16 h when there was chyme in gastrointestinal tract (GT). Dietary Cu assimilation mainly occurred before 16 h after feeding. Waterborne (65)Cu influx rate in the GT was positively correlated with (65)Cu contents of chyme in NDG, whereas it was largely negatively correlated with (65)Cu contents of chyme in DCG. The waterborne Cu uptake in the GT was mainly influenced by the chyme flow and dietary Cu assimilation. Overall, our findings suggested that feeding has an important effect on waterborne metal uptake and that both the feeding status of the fish and the relative metal exposure through water and food should be considered in prediction of the metal bioaccumulation and biomonitoring programs.
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Affiliation(s)
- Zhiqiang Guo
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, Dorset, BH12 5BB, UK
| | - Wei Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China
| | - Sen Du
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Yanyan Zhou
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Na Gao
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China; University of the Chinese Academy of Sciences, Beijing 100049, PR China
| | - Li Zhang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China.
| | - Iain Green
- Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, Dorset, BH12 5BB, UK
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27
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Custer KW, Hammerschmidt CR, Burton GA. Nickel toxicity to benthic organisms: The role of dissolved organic carbon, suspended solids, and route of exposure. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 208:309-17. [PMID: 26552544 DOI: 10.1016/j.envpol.2015.09.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 09/19/2015] [Accepted: 09/21/2015] [Indexed: 05/19/2023]
Abstract
Nickel bioavailability is reduced in the presence of dissolved organic carbon (DOC), suspended solids (TSS), and other complexing ligands; however, no studies have examined the relative importance of Ni exposure through different compartments (water, sediment, food). Hyalella azteca and Lymnaea stagnalis were exposed to Ni-amended water, sediment, and food, either separately or in combination. Both organisms experienced survival and growth effects in several Ni compartment tests. The DOC amendments attenuated L. stagnalis Ni effects (survival, growth, and (62)Ni bioaccumulation), and presence of TSS exposures demonstrated both protective and synergistic effects on H. azteca and L. stagnalis. (62)Ni trophic transfer from food to H. azteca and L. stagnalis was negligible; however, bioaccumulating (62)Ni was attributed to (62)Ni-water ((62)Ni flux from food), (62)Ni-TSS, and (62)Ni-food. Overall, H. azteca and L. stagnalis Ni compartment toxicity increased in the following order: Ni-water >> Ni-sediment >> Ni-all (water, sediment, food) >> Ni-food.
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Affiliation(s)
- Kevin W Custer
- Department of Earth and Environmental Sciences, Wright State University, Dayton, OH 45435, USA.
| | - Chad R Hammerschmidt
- Department of Earth and Environmental Sciences, Wright State University, Dayton, OH 45435, USA
| | - G Allen Burton
- Department of Earth and Environmental Sciences, Wright State University, Dayton, OH 45435, USA; School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI, 48109, USA
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28
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Stoiber T, Croteau MN, Römer I, Tejamaya M, Lead JR, Luoma SN. Influence of hardness on the bioavailability of silver to a freshwater snail after waterborne exposure to silver nitrate and silver nanoparticles. Nanotoxicology 2015; 9:918-27. [DOI: 10.3109/17435390.2014.991772] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ramskov T, Thit A, Croteau MN, Selck H. Biodynamics of copper oxide nanoparticles and copper ions in an oligochaete - Part I: Relative importance of water and sediment as exposure routes. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 164:81-91. [PMID: 25935103 DOI: 10.1016/j.aquatox.2015.04.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 04/18/2015] [Accepted: 04/21/2015] [Indexed: 06/04/2023]
Abstract
Copper oxide (CuO) nanoparticles (NPs) are widely used, and likely released into the aquatic environment. Both aqueous (i.e., dissolved Cu) and particulate Cu can be taken up by organisms. However, how exposure routes influence the bioavailability and subsequent toxicity of Cu remains largely unknown. Here, we assess the importance of exposure routes (water and sediment) and Cu forms (aqueous and nanoparticulate) on Cu bioavailability and toxicity to the freshwater oligochaete, Lumbriculus variegatus, a head-down deposit-feeder. We characterize the bioaccumulation dynamics of Cu in L. variegatus across a range of exposure concentrations, covering both realistic and worst-case levels of Cu contamination in the environment. Both aqueous Cu (Cu-Aq; administered as Cu(NO3)2) and nanoparticulate Cu (CuO NPs), whether dispersed in artificial moderately hard freshwater or mixed into sediment, were weakly accumulated by L. variegatus. Once incorporated into tissues, Cu elimination was negligible, i.e., elimination rate constants were in general not different from zero for either exposure route or either Cu form. Toxicity was only observed after waterborne exposure to Cu-Aq at very high concentration (305μgL(-1)), where all worms died. There was no relationship between exposure route, Cu form or Cu exposure concentration on either worm survival or growth. Slow feeding rates and low Cu assimilation efficiency (approximately 30%) characterized the uptake of Cu from the sediment for both Cu forms. In nature, L. variegatus is potentially exposed to Cu via both water and sediment. However, sediment progressively becomes the predominant exposure route for Cu in L. variegatus as Cu partitioning to sediment increases.
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Affiliation(s)
- Tina Ramskov
- Department of Environmental, Social and Spatial Change, Roskilde University, PO Box 260, Universitetsvej 1, DK-4000 Roskilde, Denmark; US Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States.
| | - Amalie Thit
- Department of Environmental, Social and Spatial Change, Roskilde University, PO Box 260, Universitetsvej 1, DK-4000 Roskilde, Denmark.
| | - Marie-Noële Croteau
- US Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States.
| | - Henriette Selck
- Department of Environmental, Social and Spatial Change, Roskilde University, PO Box 260, Universitetsvej 1, DK-4000 Roskilde, Denmark; US Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States.
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30
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Ramskov T, Croteau MN, Forbes VE, Selck H. Biokinetics of different-shaped copper oxide nanoparticles in the freshwater gastropod, Potamopyrgus antipodarum. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 163:71-80. [PMID: 25863028 DOI: 10.1016/j.aquatox.2015.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 03/22/2015] [Accepted: 03/24/2015] [Indexed: 06/04/2023]
Abstract
Sediment is recognized as a major environmental sink for contaminants, including engineered nanoparticles (NPs). Consequently, sediment-living organisms are likely to be exposed to NPs. There is evidence that both accumulation and toxicity of metal NPs to sediment-dwellers increase with decreasing particle size, although NP size does not always predict effects. In contrast, not much is known about the influence of particle shape on bioaccumulation and toxicity. Here, we examined the influence of copper oxide (CuO) NP shape (rods, spheres, and platelets) on their bioaccumulation kinetics and toxicity to the sediment-dwelling gastropod, Potamopyrgus antipodarum. The influence of Cu added as CuCl2 (i.e., aqueous Cu treatment) was also examined. Exposure to sediment mixed with aqueous Cu or with different-shaped CuO NPs at an average measured exposure concentration of 207μg Cu per g dry weight sediment for 14 days did not significantly affect snail mortality. However, growth decreased for snails exposed to sediment amended with CuO NP spheres and platelets. P. antipodarum accumulated Cu from all Cu forms/shapes in significant amounts compared to control snails. In addition, once accumulated, Cu was efficiently retained (i.e., elimination rate constants were generally not significantly different from zero). Consequently, snails are likely to concentrate Cu over time, from both aqueous and NP sources, resulting in a high potential for toxicity.
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Affiliation(s)
- Tina Ramskov
- Department of Environmental, Social and Spatial Change, Roskilde University, PO Box 260, Universitetsvej 1, Roskilde DK-4000, Denmark.
| | - Marie-Noële Croteau
- US Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States.
| | - Valery E Forbes
- School of Biological Sciences, University of Nebraska-Lincoln, 348 Manter Hall, Lincoln 68588, United States.
| | - Henriette Selck
- Department of Environmental, Social and Spatial Change, Roskilde University, PO Box 260, Universitetsvej 1, Roskilde DK-4000, Denmark.
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31
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Khan FR, Paul KB, Dybowska AD, Valsami-Jones E, Lead JR, Stone V, Fernandes TF. Accumulation dynamics and acute toxicity of silver nanoparticles to Daphnia magna and Lumbriculus variegatus: implications for metal modeling approaches. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:4389-4397. [PMID: 25756614 DOI: 10.1021/es506124x] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Frameworks commonly used in trace metal ecotoxicology (e.g., biotic ligand model (BLM) and tissue residue approach (TRA)) are based on the established link between uptake, accumulation and toxicity, but similar relationships remain unverified for metal-containing nanoparticles (NPs). The present study aimed to (i) characterize the bioaccumulation dynamics of PVP-, PEG-, and citrate-AgNPs, in comparison to dissolved Ag, in Daphnia magna and Lumbriculus variegatus; and (ii) investigate whether parameters of bioavailability and accumulation predict acute toxicity. In both species, uptake rate constants for AgNPs were ∼ 2-10 times less than for dissolved Ag and showed significant rank order concordance with acute toxicity. Ag elimination by L. variegatus fitted a 1-compartment loss model, whereas elimination in D. magna was biphasic. The latter showed consistency with studies that reported daphnids ingesting NPs, whereas L. variegatus biodynamic parameters indicated that uptake and efflux were primarily determined by the bioavailability of dissolved Ag released by the AgNPs. Thus, principles of BLM and TRA frameworks are confounded by the feeding behavior of D. magna where the ingestion of AgNPs perturbs the relationship between tissue concentrations and acute toxicity, but such approaches are applicable when accumulation and acute toxicity are linked to dissolved concentrations. The uptake rate constant, as a parameter of bioavailability inclusive of all available pathways, could be a successful predictor of acute toxicity.
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Affiliation(s)
- Farhan R Khan
- †School of Life Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, United Kingdom
| | - Kai B Paul
- †School of Life Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, United Kingdom
| | | | - Eugenia Valsami-Jones
- §School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, England
| | - Jamie R Lead
- ∥SmartState Center for Environmental Nanoscience and Risk (CENR), Arnold School of Public Health, University of South Carolina, Columbia, South Carolina 29088, United States
| | - Vicki Stone
- †School of Life Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, United Kingdom
| | - Teresa F Fernandes
- †School of Life Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, United Kingdom
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32
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Bourgeault A, Cousin C, Geertsen V, Cassier-Chauvat C, Chauvat F, Durupthy O, Chanéac C, Spalla O. The challenge of studying TiO2 nanoparticle bioaccumulation at environmental concentrations: crucial use of a stable isotope tracer. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:2451-2459. [PMID: 25587677 DOI: 10.1021/es504638f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The ecotoxicity of nanoparticles (NPs) is a growing area of research with many challenges ahead. To be relevant, laboratory experiments must be performed with well-controlled and environmentally realistic (i.e., low) exposure doses. Moreover, when focusing on the intensively manufactured titanium dioxide (TiO2) NPs, sample preparations and chemical analysis are critical steps to meaningfully assay NP's bioaccumulation. To deal with these imperatives, we synthesized for the first time TiO2 NPs labeled with the stable isotope (47)Ti. Thanks to the (47)Ti labeling, we could detect the bioaccumulation of NPs in zebra mussels (Dreissena polymorpha) exposed for 1 h at environmental concentrations via water (7-120 μg/L of (47)TiO2 NPs) and via their food (4-830 μg/L of (47)TiO2 NPs mixed with 1 × 10(6) cells/mL of cyanobacteria) despite the high natural Ti background, which varied in individual mussels. The assimilation efficiency (AE) of TiO2 NPs by mussels from their diet was very low (AE = 3.0 ± 2.7%) suggesting that NPs are mainly captured in mussel gut, with little penetration in their internal organs. Thus, our methodology is particularly relevant in predicting NP's bioaccumulation and investigating the factors influencing their toxicokinetics in conditions mimicking real environments.
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Affiliation(s)
- Adeline Bourgeault
- CEA Saclay, DSM/IRAMIS/NIMBE/LIONS, UMR CEA-CNRS 3299, 91191 Gif-sur-Yvette, France
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Shoults-Wilson WA, Elsayed N, Leckrone K, Unrine J. Zebra mussels (Dreissena polymorpha) as a biomonitor of trace elements along the southern shoreline of Lake Michigan. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:412-419. [PMID: 25477315 DOI: 10.1002/etc.2825] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/08/2014] [Accepted: 11/22/2014] [Indexed: 06/04/2023]
Abstract
The invasive zebra mussel (Dreissena polymorpha) has become an accepted biomonitor organism for trace elements, but it has yet to be studied along the Lake Michigan shoreline. Likewise, the relationships between tissue concentrations of elements, organism size, and sediment concentrations of elements have not been fully explained. The present study found that a variety of allometric variables such as length, dry tissue mass, shell mass, organism condition indices, and shell thickness index were useful in explaining intrasite variability in elemental concentrations. The flesh condition index (grams of tissue dry mass per gram of shell mass) explained variability at the most sites for most elements. Once allometric intrasite variability was taken into account, additional significant differences were found between sites, although the net effect was small. Significant positive relationships between sediment and tissue concentrations were found for Pb and Zn, with a significant negative relationship for Cd. It was also found that Cu and Zn concentrations in tissues increased significantly along the shoreline in the southeasterly direction, whereas Hg increased in a northwesterly direction. Opportunistic sampling found that zebra mussels accumulate significantly higher concentrations of nearly all elements analyzed compared to Asian clams (Corbicula fluminea) at the same site. The present study demonstrates the need to fully explain natural sources of variability before using biomonitors to explain spatial distributions of trace elements.
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Affiliation(s)
- W Aaron Shoults-Wilson
- Department of Biological Chemical and Physical Sciences, Roosevelt University, Chicago, Illinois, USA
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Arsenic efflux from Microcystis aeruginosa under different phosphate regimes. PLoS One 2014; 9:e116099. [PMID: 25549253 PMCID: PMC4280192 DOI: 10.1371/journal.pone.0116099] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 11/17/2014] [Indexed: 11/23/2022] Open
Abstract
Phytoplankton plays an important role in arsenic speciation, distribution, and cycling in freshwater environments. Little information, however, is available on arsenic efflux from the cyanobacteria Microcystis aeruginosa under different phosphate regimes. This study investigated M. aeruginosa arsenic efflux and speciation by pre-exposing it to 10 µM arsenate or arsenite for 24 h during limited (12 h) and extended (13 d) depuration periods under phosphate enriched (+P) and phosphate depleted (−P) treatments. Arsenate was the predominant species detected in algal cells throughout the depuration period while arsenite only accounted for no greater than 45% of intracellular arsenic. During the limited depuration period, arsenic efflux occurred rapidly and only arsenate was detected in solutions. During the extended depuration period, however, arsenate and dimethylarsinic acid (DMA) were found to be the two predominant arsenic species detected in solutions under −P treatments, but arsenate was the only species detected under +P treatments. Experimental results also suggest that phosphorus has a significant effect in accelerating arsenic efflux and promoting arsenite bio-oxidation in M. aeruginosa. Furthermore, phosphorus depletion can reduce arsenic efflux from algal cells as well as accelerate arsenic reduction and methylation. These findings can contribute to our understanding of arsenic biogeochemistry in aquatic environments and its potential environmental risks under different phosphorus levels.
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Wang W, Evans RD, Hickie BE, Rouvinen-Watt K, Evans HE. Methylmercury accumulation and elimination in mink (Neovison vison) hair and blood: results of a controlled feeding experiment using stable isotope tracers. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2014; 33:2873-2880. [PMID: 25258205 DOI: 10.1002/etc.2762] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 07/25/2014] [Accepted: 09/21/2014] [Indexed: 06/03/2023]
Abstract
Concentrations of metals in hair are used often to develop pharmacokinetic models for both animals and humans. Although data on uptake are available, elimination kinetics are less well understood; stable isotope tracers provide an excellent tool for measuring uptake and elimination kinetics. In the present study, methylmercury concentrations through time were measured in the hair and blood of mink (Neovison vison) during a controlled 60-d feeding experiment. Thirty-four mink were fed a standard fish-based diet for 14 d, at the end of which (day 0), 4 mink were sacrificed to determine baseline methylmercury (MeHg) concentrations. From day 0 to day 10, the remaining mink were fed a diet consisting of the base diet supplemented with 0.513 ± 0.013 µg Me(199) Hg/g and 0.163 ± 0.003 µg Me(201) Hg/g. From day 10 to day 60, mink were fed the base diet supplemented with 0.175 ± 0.024 µg Me(201) Hg/g. Animals were sacrificed periodically to determine accumulation of Me(201) Hg in blood and hair over the entire 60-d period and the elimination of Me(199) Hg over the last 50 d. Hair samples, collected from each mink and cut into 2.0-mm lengths, indicate that both isotopes of MeHg appeared in the hair closest to the skin at approximately day 10, with concentrations in the hair reaching steady state from day 39 onward. The elimination rate of Me(199) Hg from the blood was 0.05/d, and the ratio of MeHg in the hair to blood was 119. A large fraction of MeHg (22% to >100%) was stored in the hair, suggesting that in fur-bearing mammals the hair is a major route of elimination of MeHg from the body.
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Affiliation(s)
- Wei Wang
- Environmental & Life Sciences Graduate Programme, Trent University, Peterborough, Ontario, Canada
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Fan W, Ren J, Wu C, Tan C, Wang X, Cui M, Wu K, Li X. Using enriched stable isotope technique to study Cu bioaccumulation and bioavailability in Corbicula fluminea from Taihu Lake, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:14069-14077. [PMID: 25047015 DOI: 10.1007/s11356-014-3325-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 07/11/2014] [Indexed: 06/03/2023]
Abstract
In this study, we measured trace metals (Cd, Cr, Cu, Ni, Pb, and Zn) in water and sediment from representative sites of Taihu Lake, with focus on the analysis of trace metal accumulation in Corbicula fluminea (bivalve). The results showed that the quality of water in Taihu Lake was generally good and the correlation was not found between Cu bioaccumulation in C. fluminea and the concentration in water and sediment. Thus, using the stable isotope tracer method, we studied Cu uptake from the water phase, the assimilation of Cu from the food phase, and the efflux of Cu in vivo by C. fluminea. The result revealed that this species exhibited a relatively lower efflux rate constant of Cu compared with other zoobenthos species. Using a simple bioenergetics-based kinetic model, Cu concentrations in the C. fluminea were calculated with the measured efflux rate. We put forward a novel method, which was taking the influence of biological kinetic on metal bioaccumulation into account to explain the field survey data.
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Affiliation(s)
- Wenhong Fan
- School of Chemistry and Environment, Beihang University, Beijing, 100191, People's Republic of China,
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Pellet B, Ayrault S, Tusseau-Vuillemin MH, Gourlay-Francé C. Quantifying diet-borne metal uptake in Gammarus pulex using stable isotope tracers. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 110:182-189. [PMID: 25244686 DOI: 10.1016/j.ecoenv.2014.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 08/30/2014] [Accepted: 09/02/2014] [Indexed: 06/03/2023]
Abstract
Gammarids are aquatic amphipods widely used for water quality monitoring. To investigate the copper and cadmium diet-borne metal uptake in Gammarus pulex, we adapted the pulse-chase stable isotopes-based approach to determine the food ingestion rate (IR), the gut retention time (GRT) and the metal assimilation efficiencies (AE). G. pulex were fed with (65)Cu-, (106)Cd-, and (53)Cr-labeled alder leaves for 7.5h and then with unlabeled leaves for 5d. The metal stable isotope contents in the gammarids, leaves, filtered water and periodically collected feces were determined. Chromium was poorly assimilated by the gammarids; thus, Cr was used as an unassimilated tracer. The first tracer defecation occurred before the first feces harvest, indicating a gut passage time of less than 9h. A 24-h GRT and a 0.69gg(-1)d(-1) IR were estimated. The Cd AE value was estimated as 5-47%, depending on the assimilation determination method applied. The Cu AE value could not be evaluated regardless of the determination method used, most likely because of the rapid Cu regulation in gammarids in addition to analytical uncertainties when determining the Cu content in leaves. Application of the Cd AE value in the framework of the biodynamic bioaccumulation model shows that the diet-borne uptake of Cd significantly contributes (66-95%) to the metal bioaccumulation in G. pulex fed with alder leaves.
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Affiliation(s)
- Bastien Pellet
- IRSTEA, Unité de Recherche Hydrosystèmes et Bioprocédés, 1 rue P.-G. de Gennes, 92731 Antony, France
| | - Sophie Ayrault
- Laboratoire des Sciences du Climat et de l׳Environnement LSCE (CEA-CNRS-UVSQ), UMR 8212, Bât. 12 Av. de la Terrasse, 911198 Gif-sur-Yvette cedex, France.
| | | | - Catherine Gourlay-Francé
- IRSTEA, Unité de Recherche Hydrosystèmes et Bioprocédés, 1 rue P.-G. de Gennes, 92731 Antony, France
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Komjarova I, Bury NR. Evidence of common cadmium and copper uptake routes in zebrafish Danio rerio. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:12946-12951. [PMID: 25289693 DOI: 10.1021/es5032272] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cadmium and copper accumulations in gills of zebrafish were measured during a 48 h exposure to 0.025 μM 106Cd and 0.05 or 0.5 μM 65Cu as a single metal or their mixtures. The gill transcript levels of genes involved in the transport of Cu (CTR1 and ATP7A), Na (NHE-2), Ca (ECaC), divalent metals (DMT1), and Zn (ZIP8) were also compared between treatments at 24 and 48 h. Cd uptake was significantly suppressed in the presence of Cu, indicating interaction between Cu and Cd at uptake sites, but Cu uptake was unaffected by Cd. The decrease in Cd accumulation rates in the presence of Cu was associated with an increase in transcript abundance of ECaC at 24 h and DMT1 at 48 h and a decrease in Zip8 transcript levels, all known as routes for Cd uptake. Fish exposed to 0.5 μM 65Cu show an increase in gill ATP7a transcript abundance, suggesting that Cu is removed from the gill and is transferred to other organs for detoxification. A reduction in gill CTR1 transcript abundance was observed during the Cu-Cd exposure; this may be a regulatory mechanism to reduce Cu loading if Cu is entering the gills by other uptake routes, such as ECaC and DMT1.
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Affiliation(s)
- I Komjarova
- King's College London , Division of Diabetes and Nutritional Science, Franklin Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom
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39
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Croteau MN, Misra SK, Luoma SN, Valsami-Jones E. Bioaccumulation and toxicity of CuO nanoparticles by a freshwater invertebrate after waterborne and dietborne exposures. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:10929-10937. [PMID: 25110983 DOI: 10.1021/es5018703] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The incidental ingestion of engineered nanoparticles (NPs) can be an important route of uptake for aquatic organisms. Yet, knowledge of dietary bioavailability and toxicity of NPs is scarce. Here we used isotopically modified copper oxide ((65)CuO) NPs to characterize the processes governing their bioaccumulation in a freshwater snail after waterborne and dietborne exposures. Lymnaea stagnalis efficiently accumulated (65)Cu after aqueous and dietary exposures to (65)CuO NPs. Cu assimilation efficiency and feeding rates averaged 83% and 0.61 g g(-1) d(-1) at low exposure concentrations (<100 nmol g(-1)), and declined by nearly 50% above this concentration. We estimated that 80-90% of the bioaccumulated (65)Cu concentration in L. stagnalis originated from the (65)CuO NPs, suggesting that dissolution had a negligible influence on Cu uptake from the NPs under our experimental conditions. The physiological loss of (65)Cu incorporated into tissues after exposures to (65)CuO NPs was rapid over the first days of depuration and not detectable thereafter. As a result, large Cu body concentrations are expected in L. stagnalis after exposure to CuO NPs. To the degree that there is a link between bioaccumulation and toxicity, dietborne exposures to CuO NPs are likely to elicit adverse effects more readily than waterborne exposures.
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40
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Khan FR, Kennaway GM, Croteau MN, Dybowska A, Smith BD, Nogueira AJA, Rainbow PS, Luoma SN, Valsami-Jones E. In vivo retention of ingested Au NPs by Daphnia magna: no evidence for trans-epithelial alimentary uptake. CHEMOSPHERE 2014; 100:97-104. [PMID: 24411838 DOI: 10.1016/j.chemosphere.2013.12.051] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 12/13/2013] [Accepted: 12/16/2013] [Indexed: 06/03/2023]
Abstract
In vivo studies with Daphnia magna remain inconclusive as to whether engineered nanoparticles (NPs) are internalized into tissues after ingestion. Here we used a three-pronged approach to study the in vivo retention and efflux kinetics of 20 nm citrate stabilized Au NPs ingested by this key aquatic species. Daphnids were exposed to suspended particles (600 μg L(-1)) for 5 h after which they were depurated for 24 h in clean water containing algae. Light microscopy was used to follow the passage of Au NPs through the gastrointestinal tract, Au body burdens were determined by ICP-MS (inductively coupled plasma mass spectrometry), and transmission electron microscopy (TEM) was used to examine the presence and distribution of Au NPs in tissues. Results revealed that the elimination of Au NPs was bi-phasic. The fast elimination phase lasted<1h and the rate constant at which Au (of Au NPs) was eliminated was 1.12 ± 0.34 h(-1) (±SE) which accounted for ∼75% of the ingested Au. The remaining ∼25% of the ingested Au NPs was eliminated at a 100-fold slower rate. TEM analysis revealed that Au NPs in the midgut were in close proximity to the peritrophic membrane after 1 and 24h of depuration. There were no observations of Au NP uptake at the microvilli. Thus, although Au NPs were retained in the gut lumen, there was no observable internalization into the gut epithelial cells. Similar to carbon nanotubes and CuO NPs, our findings indicate that in daphnids the in vivo retention of Au NPs does not necessarily result in their internalization.
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Affiliation(s)
- Farhan R Khan
- Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, England, United Kingdom.
| | - Gabrielle M Kennaway
- Imaging and Analysis Centre, Natural History Museum, Cromwell Road, London SW7 5BD, England, United Kingdom
| | - Marie-Noële Croteau
- U.S. Geological Survey, 345 Middlefield Road, MS 465, Menlo Park, CA 94025, United States
| | - Agnieszka Dybowska
- Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, England, United Kingdom
| | - Brian D Smith
- Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, England, United Kingdom
| | - António J A Nogueira
- Department of Biology & CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Philip S Rainbow
- Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, England, United Kingdom
| | - Samuel N Luoma
- U.S. Geological Survey, 345 Middlefield Road, MS 465, Menlo Park, CA 94025, United States; John Muir Institute of the Environment, University of California at Davis, Davis, CA, United States
| | - Eugenia Valsami-Jones
- Earth Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, England, United Kingdom; School of Geography Earth & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, England, United Kingdom
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41
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Luoma SN, Khan FR, Croteau MN. Bioavailability and Bioaccumulation of Metal-Based Engineered Nanomaterials in Aquatic Environments. NANOSCIENCE AND THE ENVIRONMENT 2014. [DOI: 10.1016/b978-0-08-099408-6.00005-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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42
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Zhong H, Kraemer L, Evans D. Influence of body size on Cu bioaccumulation in zebra mussels Dreissena polymorpha exposed to different sources of particle-associated Cu. JOURNAL OF HAZARDOUS MATERIALS 2013; 261:746-752. [PMID: 23643199 DOI: 10.1016/j.jhazmat.2013.03.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 03/29/2013] [Accepted: 03/31/2013] [Indexed: 06/02/2023]
Abstract
Size of organisms is critical in controlling metal bioavailability and bioaccumulation, while mechanisms of size-related metal bioaccumulation are not fully understood. To investigate the influences of different sources of particle-associated Cu on body size-related Cu bioavailability and bioaccumulation, zebra mussels (Dreissena polymorpha) of different sizes were exposed to stable Cu isotope ((65)Cu) spiked algae (Chlorella vulgaris) or sediments in the laboratory and the Cu tissue concentration-size relationships were compared with that in unexposed mussels. Copper tissue concentrations decreased with mussel size (tissue or shell dry weight) in both unexposed and algal-exposed mussels with similar decreasing patterns, but were independent of size in sediment-exposed mussels. Furthermore, the relative contribution of Cu uptake from algae (65-91%) to Cu bioaccumulation is always higher than that from sediments (9-35%), possibly due to the higher bioavailability of algal-Cu. Therefore, the size-related ingestion of algae could be more important in influencing the size-related variations in Cu bioaccumulation. However, the relative contribution of sediment-Cu to Cu bioaccumulation increased with body size and thus sediment ingestion may also affect the size-related Cu variations in larger mussels (tissue weight >7.5mg). This study highlights the importance of considering exposure pathways in normalization of metal concentration variation when using bivalves as biomonitors.
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Affiliation(s)
- Huan Zhong
- Environmental and Resource Studies Program, Trent University, Peterborough, Ontario, Canada; Nanjing University, School of Environment, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing, Jiangsu Province, People's Republic of China.
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Croteau MN, Cain DJ, Fuller CC. Novel and nontraditional use of stable isotope tracers to study metal bioavailability from natural particles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:3424-3431. [PMID: 23458345 DOI: 10.1021/es400162f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We devised a novel tracing approach that involves enriching test organisms with a stable metal isotope of low natural abundance prior to characterizing metal bioavailability from natural inorganic particles. In addition to circumventing uncertainties associated with labeling natural particles and distinguishing background metals, the proposed "reverse labeling" technique overcomes many drawbacks inherent to using radioisotope tracers. Specifically, we chronically exposed freshwater snails ( Lymnaea stagnalis ) to synthetic water spiked with Cu that was 99.4% (65)Cu to increase the relative abundance of (65)Cu in the snail's tissues from ~32% to >80%. The isotopically enriched snails were then exposed to benthic algae mixed with Cu-bearing Fe-Al particles collected from the Animas River (Colorado), an acid mine drainage impacted river. We used (63)Cu to trace Cu uptake from the natural particles and inferred their bioavailability from calculation of Cu assimilation into tissues. Cu assimilation from these particles was 44%, indicating that 44% of the particulate Cu was absorbed by the invertebrate. This demonstrates that inorganic particulate Cu can be bioavailable. The reverse labeling approach shows great potential in various scientific areas such as environmental contamination and nutrition for addressing questions involving uptake of an element that naturally has multiple isotopes.
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Affiliation(s)
- Marie-Noële Croteau
- US Geological Survey, MS 496, 345 Middlefield Road, Menlo Park, California 94025, United States.
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44
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Buffet PE, Amiard-Triquet C, Dybowska A, Risso-de Faverney C, Guibbolini M, Valsami-Jones E, Mouneyrac C. Fate of isotopically labeled zinc oxide nanoparticles in sediment and effects on two endobenthic species, the clam Scrobicularia plana and the ragworm Hediste diversicolor. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 84:191-198. [PMID: 22858103 DOI: 10.1016/j.ecoenv.2012.07.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 06/29/2012] [Accepted: 07/09/2012] [Indexed: 06/01/2023]
Abstract
Although it is reported that metal and metal oxide nanoparticles, which are among the most rapidly commercialized materials, can cause toxicity to organisms, their fate in the environment and toxicity to marine organisms are not well understood. In this study, we used a stable isotope labelling approach to trace the fate of nanoparticles (NPs) in sediments and also investigated bio-uptake in two estuarine intra-sedimentary invertebrates Scrobicularia plana and Nereis diversicolor. We selected exposure to 3 mg kg(-1) sediment ZnO NPs since this level is a realistic prediction of the environmental concentration in sediments. 67ZnO NPs (DLS: 21-34 nm, positively charged: 31.3 mV) suspensions were synthesised in diethylene glycol (DEG). We explored the fate of 67ZnO NPs in sediment, 67Zn bioaccumulation and the biochemical (biomarkers of defence and damage) and behavioural (burrowing kinetics and feeding rates) biomarkers in both species to 67ZnO NPs and DEG on its own during a 16 d laboratory exposure. After exposure, 67Zn concentrations in sediment showed higher levels in the upper section (1cm: 2.59 mg kg(-1)) decreasing progressively (2 cm: 1.63 mg kg(-1), 3 cm: 0.90 mg kg(-1), 4 cm: 0.67 mg kg(-1)) to a minimum value at the bottom (5 cm: 0.31 mg kg(-1)). 67Zn bioaccumulation was observed in both organisms exposed to 67ZnO NPs in DEG but no major inter-species differences were found. At the biochemical level, 67ZnO NPs exposure significantly induced increased glutathione-S-transferase activity in worms and catalase activity in clams whereas superoxide dismutase activity and thiobarbituric acid reactive substance levels were not affected in any species. Exposure to DEG on its own leads to a significant increase of metallothionein-like protein levels in clams compared with those exposed to 67ZnO NPs or controls. Burrowing behaviour as well as feeding rate were significantly impaired in both species exposed to 67ZnO NPs. Concerning exposure to DEG on its own, burrowing behaviour impairments were also shown in both species and feeding rate was impaired in bivalves. At environmentally realistic concentration of 67ZnO NPs in sediment, there is no strong evidence for a severe nanoparticle effect since most effects were also observed in the presence of DEG alone.
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Affiliation(s)
- Pierre-Emmanuel Buffet
- LUNAM Université, MMS, EA2160, Faculté de pharmacie, 9, rue Bias BP53508, 44035 Nantes Cedex 1, France
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Johns C. Trends of total cadmium, copper, and zinc in the zebra mussel (Dreissena polymorpha) along the upper reach of the St. Lawrence River: 1994-2005. ENVIRONMENTAL MONITORING AND ASSESSMENT 2012; 184:5371-5385. [PMID: 21922178 DOI: 10.1007/s10661-011-2346-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Accepted: 08/30/2011] [Indexed: 05/31/2023]
Abstract
This study examines spatial and temporal variability of bioaccumulation of cadmium, copper, and zinc in tissues of zebra mussels in the upper reach of the St. Lawrence River which originates at the outflow of Lake Ontario. It was hypothesized that concentrations of these metals in mussel tissues would decline over time and decrease with increasing distance from the outlet of Lake Ontario as a result of on-going efforts to reduce contaminant discharges into the lake. Size of mussels was also evaluated as a factor influencing bioaccumulation. Mussels were collected annually in October from six sites from 1994 to 2005, including one site near a local industry. Individuals were grouped into five or more size classes per site in each year. Soft tissues were analyzed for total cadmium, copper and zinc. Concentrations of cadmium and copper in tissues varied significantly both spatially and temporally. Cadmium concentrations were elevated at most sites; copper concentrations were moderately elevated compared with other studies in the Lake Ontario basin and St. Lawrence River. Zinc showed the most uniformity in mussels possibly due to internal regulation and to low levels of environmental exposure. Animal size correlated with copper concentrations of tissues in approximately 30% of samples but infrequently for cadmium and zinc. Cadmium and copper levels were found to decline downstream over time. Inter-annual variability of metal concentrations in mussel tissues suggests utilization in long-term monitoring programs to discern significant trends.
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Affiliation(s)
- Carolyn Johns
- Environmental Studies Department, St. Lawrence University, Canton, NY 13617, USA.
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46
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Khan FR, Misra SK, García-Alonso J, Smith BD, Strekopytov S, Rainbow PS, Luoma SN, Valsami-Jones E. Bioaccumulation dynamics and modeling in an estuarine invertebrate following aqueous exposure to nanosized and dissolved silver. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:7621-8. [PMID: 22697255 DOI: 10.1021/es301253s] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Predicting the environmental impact of engineered nanomaterials (ENMs) is increasingly important owing to the prevalence of emerging nanotechnologies. We derived waterborne uptake and efflux rate constants for the estuarine snail, Peringia ulvae, exposed to dissolved Ag (AgNO(3)) and silver nanoparticles (Ag NPs), using biodynamic modeling. Uptake rates demonstrated that dissolved Ag is twice as bioavailable as Ag in nanoparticle form. Biphasic loss dynamics revealed the faster elimination of Ag from Ag NPs at the start of depuration, but similar slow efflux rate constants. The integration of biodynamic parameters into our model accurately predicted Ag tissue burdens during chronic exposure with 85% of predicted values within a factor of 2 of observed values. Zeta potentials for the Ag NPs were lower in estuarine waters than in waters of less salinity; and uptake rates in P. ulvae were slower than reported for the freshwater snail Lymnaea stagnalis in similar experiments. This suggests aggregation of Ag NPs occurs in estuarine waters and reduces, but does not eliminate, bioavailability of Ag from the Ag NPs. Biodynamic modeling provides an effective methodology to determine bioavailable metal concentrations (originating from metal and metal-oxide nanoparticles) in the environment and may aid future ENM risk assessment.
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Affiliation(s)
- Farhan R Khan
- Department of Zoology, Natural History Museum, Cromwell Road, London SW7 5BD, England.
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Zhong H, Kraemer L, Evans D. Effects of aging on the digestive solubilization of Cu from sediments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2012; 164:195-203. [PMID: 22366348 DOI: 10.1016/j.envpol.2012.01.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2011] [Revised: 01/26/2012] [Accepted: 01/27/2012] [Indexed: 05/31/2023]
Abstract
Solubilization of particulate Cu by different solutions, mimicking digestive fluids of deposit-feeders, was quantified in stable isotope (65)Cu-spiked sediments (with 3 days-2 months Cu-sediment contact time or aging). Copper solubilization generally decreased with prolonged aging. However, such decrease became less evident after 1 month and equilibrium of Cu in sediments could be reached after 2 months. Aging effects on Cu solubilization can be explained by the changes in Cu geochemical fractionation with aging: Cu generally transferred from more mobile phases (carbonate and Fe-Mn associated) to more refractory phases (organic associated and residual phase). Besides Cu geochemical fractionation, digestive fluid composition and different Cu solubilization pathways involved, as well as sedimentary organic content, could all affect the digestive solubilization of Cu and its change with aging. Our results emphasize the necessity of considering Cu aging in laboratory sediment toxicity experiments, and in risk assessment of Cu contaminated sediments.
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Affiliation(s)
- Huan Zhong
- Environmental and Resource Studies Program, Trent University, Peterborough, Ontario, Canada.
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48
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Bourgeault A, Gourlay-Francé C, Ayrault S, Tusseau-Vuillemin MH. Bioaccumulation of waterborne Ni in Dreissena polymorpha: a stable isotope experiment to assess the effect of zinc, calcium, and dissolved organic matter. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2012; 31:819-827. [PMID: 22278957 DOI: 10.1002/etc.1755] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/22/2011] [Accepted: 11/21/2011] [Indexed: 05/31/2023]
Abstract
The effect of Ca, Zn, and dissolved natural organic matter (NOM) on waterborne Ni accumulation was investigated in a freshwater mussel. An enriched stable metal isotope tracer was required to measure the Ni uptake rate accurately. Zebra mussels were exposed to environmentally relevant concentrations of (62) Ni (from 0.5 to 8 µg/L) for 48 h in media spiked with Ca, Zn, or dissolved NOM. The (62)Ni uptake was inhibited by Ca (from 0.138 ± 0.021 to 0.061 ± 0.010 L/g/d for Ca concentrations ranging from 43 to 133 mg/L) and enhanced by Zn (from 0.051 ± 0.006 to 0.109 ± 0.007 L/g/d for Zn concentrations ranging from 6.6 to 38.3 µg/L). The mechanisms behind the synergistic effect of Zn remain unclear, yet it can be hypothesized that Ni uptake is facilitated by Zn-dependent transport sites. To formalize the effects of Ca and Zn, a model was proposed to express the Ni uptake rate as a function of the mussels' filtration rate and of Ca and Zn concentrations. The (62)Ni uptake increased at low NOM concentrations and decreased at higher concentrations. This could be explained by the influence of NOM on both the speciation of Ni and the filtration activity of mussels. At high NOM concentrations, a modification of the membrane's permeability might also have favored Ni uptake, although this was not clearly established in this study. Therefore, the effect of water composition on Ni bioavailability to zebra mussels cannot be predicted by competition and complexation models alone, because it also influences the animal's physiology.
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Affiliation(s)
- A Bourgeault
- Irstea, Unité de Recherche Hydro-systèmes et Bioprocédés, Antony, France
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49
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Pokrovsky OS, Pokrovski GS, Shirokova LS, Gonzalez AG, Emnova EE, Feurtet-Mazel A. Chemical and structural status of copper associated with oxygenic and anoxygenic phototrophs and heterotrophs: possible evolutionary consequences. GEOBIOLOGY 2012; 10:130-149. [PMID: 22039921 DOI: 10.1111/j.1472-4669.2011.00303.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Copper adsorption on the surface and intracellular uptake inside the cells of four representative taxons of soil and aquatic micro-organisms: aerobic rhizospheric heterotrophs (Pseudomonas aureofaciens), anoxygenic (Rhodovulum steppense) and oxygenic (cyanobacteria Gloeocapsa sp. and freshwater diatoms Navicula minima) phototrophs were studied in a wide range of pH, copper concentration, and time of exposure. Chemical status of adsorbed and assimilated Cu was investigated using in situ X-ray absorption spectroscopy. In case of adsorbed copper, XANES spectra demonstrated significant fractions of Cu(I) likely in the form of tri-coordinate complexes with O/N and/or S ligands. Upon short-term reversible adsorption at all four studied micro-organisms' cell surface, Cu(II) is coordinated by 4.0 ± 0.5 planar oxygens at an average distance of 1.97 ± 0.02 Å, which is tentatively assigned to the carboxylate groups. The atomic environment of copper incorporated into diatoms and cyanobacteria during long-term growth is similar to that of the adsorbed metal with slightly shorter distances to the first O/N neighbor (1.95 Å). In contrast to the common view of Cu status in phototrophic micro-organisms, XAFS failed to detect sulfur in the nearest atomic environment of Cu assimilated by freshwater plankton (cyanobacteria) and periphyton (diatoms). The appearance of S in Cu 1st coordination shell at 2.27-2.32 Å was revealed only after long-term interaction of Cu with anoxygenic phototrophs (and Cu uptake by soil heterotrophs), suggesting Cu scavenging in the form of sulfhydryl, histidine/carboxyl or a mixture of carboxylate and sulfhydryl complexes. These new structural constraints suggest that adsorbed Cu(II) is partially reduced to Cu(I) already at the cell surface, where as intracellular Cu uptake and storage occur in the form of both Cu(I)-S linked proteins and Cu(II) carboxylates. Obtained results allow to better understand how, in the course of biological evolution, micro-organisms elaborated various mechanisms of Cu uptake and storage, from passive adsorption and uptake to active, protein-controlled surface reduction, and intracellular storage.
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Affiliation(s)
- O S Pokrovsky
- Géosciences Environnement Toulouse (GET), Université de Toulouse, Toulouse, France.
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Zhong H, Evans D, Wang WX. Uptake of dissolved organic carbon-complexed ⁶⁵Cu by the green mussel Perna viridis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:2383-2390. [PMID: 22242907 DOI: 10.1021/es203175q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Stable Cu isotope ((65)Cu) was complexed with various representative dissolved organic carbon (DOC) types, including coastal seawater DOC, fulvic acid (FA), cyanobacteria spirulina (SP) DOC, histidine (His), cysteine (Cys), and lipophilic diethyl dithiocarbamate (DDC) at different concentrations. The uptake of these dissolved Cu species by the coastal green mussel Perna viridis was quantified for the first time. Copper complexed with different DOC types were taken up in some measure by mussels, depending on the DOC types. However, complexation generally reduced Cu uptake as compared to that of inorganic Cu species, and DOC type-specific negative relationships were found between DOC levels and Cu uptake. Strong Cu binding sites (including His and organic sulfur functional groups) within DOC appeared to control the inhibitory effects of DOC on Cu uptake, possibly due to the competitive binding of Cu between the dissolved phase and biological membranes. Therefore, differences in strong Cu binding site levels may explain the differences in bioavailability of Cu complexed with different types of DOC. At the same time, the variations in Cu-DOC uptake may also be partly attributed to the absorption of Cu-DOC complexes, especially for the small Cu-DOC complexes (e.g., Cu-Cys, Cu-His, or Cu-DDC). Our study highlights the importance of considering the specificity of Cu-DOC complexes when assessing biological exposure to dissolved Cu in natural waters, especially during events, such as phytoplankton bloom periods, that could modify DOC composition and concentrations.
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Affiliation(s)
- Huan Zhong
- Environmental and Resource Studies Program (ERS), Trent University, Peterborough, Ontario, Canada
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