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Fobert EK, Miller CR, Swearer SE, Mayer-Pinto M. The impacts of artificial light at night on the ecology of temperate and tropical reefs. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220362. [PMID: 37899007 PMCID: PMC10613546 DOI: 10.1098/rstb.2022.0362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/19/2023] [Indexed: 10/31/2023] Open
Abstract
Despite 22% of the world's coastal regions experiencing some degree of light pollution, and biologically important artificial light at night (ALAN) reaching large portions of the seafloor (greater than 75%) near coastal developments, the impacts of ALAN on temperate and tropical reefs are still relatively unknown. Because many reef species have evolved in response to low-light nocturnal environments, consistent daily, lunar, and seasonal light cycles, and distinct light spectra, these impacts are likely to be profound. Recent studies have found ALAN can decrease reproductive success of fishes, alter predation rates of invertebrates and fishes, and impact the physiology and biochemistry of reef-building corals. In this paper, we integrate knowledge of the role of natural light in temperate and tropical reefs with a synthesis of the current literature on the impacts of ALAN on reef organisms to explore potential changes at the system level in reef communities exposed to ALAN. Specifically, we identify the direct impacts of ALAN on individual organisms and flow on effects for reef communities, and present potential scenarios where ALAN could significantly alter system-level dynamics, possibly even creating novel ecosystems. Lastly, we highlight large knowledge gaps in our understanding of the overall impact of ALAN on reef systems. This article is part of the theme issue 'Light pollution in complex ecological systems'.
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Affiliation(s)
- Emily K. Fobert
- School of BioSciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Colleen R. Miller
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA
| | - Stephen E. Swearer
- National Centre for Coasts and Climate (NCCC), School of BioSciences, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Mariana Mayer-Pinto
- Centre for Marine Science and Innovation, Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, New South Wales 2052, Australia
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2
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Liu T, Zhang L. Multigenerational effects of arsenate on development and reproduction in marine copepod Tigriopus japonicus. CHEMOSPHERE 2023; 342:140158. [PMID: 37709060 DOI: 10.1016/j.chemosphere.2023.140158] [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: 06/09/2023] [Revised: 08/21/2023] [Accepted: 09/11/2023] [Indexed: 09/16/2023]
Abstract
Arsenic (As) is a persistent toxic substance, however, its toxicity to marine zooplankton remains unclear. In this study, copepods were exposed to a series of dissolved arsenate (As(V)) for four generations (F0-F3) and subsequently depurated in clean seawater for two generations (F4-F5) to assess multigenerational toxicity of As(V). As(V) exposure prolonged copepod development. The development time were 1.9, 2.4, and 3.4 days longer than the control in F0 when exposed to 50, 100, and 500 μg/L As(V), respectively, and the toxicity increased with generations. Moreover, As(V) reduced the reproductive capacity of copepods, and this effect become more severe during generation succession. The 10-day fecundities were reduced from 80 to 85 eggs per female in the control to 42 eggs per female, the lowest level, in 500 μg/L As(V) exposure group in F3. Nevertheless, the fecundity was recovered to the control level in the offspring of the 50 and 100 μg/L As(V) exposed groups (F4), suggesting it was an acclimation effect of copepods during As(V) exposure. In addition, the survival rate, development time, and reproductive parameters were significantly correlated with the As accumulation in copepods. Overall, As(V) exposure caused As bioaccumulation which negatively affected copepods' survival, development, and reproductive traits, and this toxic effect was amplified with generations and concentrations. Therefore, the multigenerational toxicity of As should be considered in the environmental risk assessments.
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Affiliation(s)
- Tianrui Liu
- 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
| | - 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; Sanya Institute of Ocean Eco-Environmental Engineering, Sanya, 572025, China.
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Ubrihien RP, Maher WA, Taylor AM, Stevens MM, Ezaz T. Fitness of Isidorella newcombi Following Multi-generational Cu Exposures: Mortality, Cellular Biomarkers and Life History Responses. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 82:520-538. [PMID: 35441861 PMCID: PMC9079030 DOI: 10.1007/s00244-022-00931-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
The effects of multigenerational Cu exposure on the freshwater gastropod Isidorella newcombi were investigated. Snails were exposed to a range of treatment-specific Cu concentrations in the parental to F2 generations, and a common Cu concentration in the F3 generation. In the parental to F2 generations, some general responses to 3 days Cu exposures included reduced survival and feeding in snails exposed to higher Cu concentrations. This suggested that the snails exposed to the high Cu concentration were experiencing Cu-induced stress that may apply selection pressure. In the F3 generation, when all treatments were exposed to a common Cu concentration, increased survival was correlated with the pre-exposure Cu concentration history. Snails that had been pre-exposed to Cu also displayed reduced stress at a sub-lethal level, indicated by lower lysosomal destabilisation (LD). Mortality and LD responses in the F3 generation were not related to Cu tissue concentrations, indicating increased tolerance and reduced stress were not related to changes in Cu bioaccumulation. Total antioxidant capacity increased in the higher Cu concentration pre-exposure treatments which could be associated with lower Cu-induced stress, however, this is not supported by the oxidative damage marker lipid peroxidation, which also increased. While Cu tissue concentrations and oxidative stress markers were assessed to determine underlying reasons for increased tolerance in snails from a population with a multi-generational exposure history to Cu, the results were not conclusive. Despite this, it was demonstrated through increased survival and reduced LD that Cu tolerance can develop over a short evolutionary time scale.
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Affiliation(s)
- R P Ubrihien
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia.
| | - W A Maher
- Research School of Earth Sciences, Australian National University, Canberra, ACT, 2601, Australia
| | - A M Taylor
- Centre for Applied Water Science, Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia
| | - M M Stevens
- NSW Department of Primary Industries, Yanco Agricultural Institute, Private Mail Bag, Yanco, NSW, 2703, Australia
- Graham Centre for Agricultural Innovation NSW Department of Primary Industries, Charles Sturt University, Wagga Wagga, Australia
| | - T Ezaz
- Centre for Conservation Ecology and Genomics, Institute for Applied Ecology, University of Canberra, Canberra, ACT, 2601, Australia
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4
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Liguori A. Multigenerational Life-History Responses to pH in Distinct Populations of the Copepod Tigriopus californicus. THE BIOLOGICAL BULLETIN 2022; 242:97-117. [PMID: 35580028 DOI: 10.1086/719573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Intertidal zones are highly dynamic and harsh habitats: organisms that persist there must face many stressors, including drastic changes in seawater pH, which can be strongly influenced by biological processes. Coastal ecosystems are heterogeneous in space and time, and populations can be exposed to distinct selective pressures and evolve different capacities for acclimation to changes in pH. Tigriopus californicus is a harpacticoid copepod found in high-shore rock pools on the west coast of North America. It is a model system for studying population dynamics in diverse environments, but little is known about its responses to changes in seawater pH. I quantified the effects of pH on the survivorship, fecundity, and development of four T. californicus populations from San Juan Island, Washington, across three generations. For all populations and generations, copepod cultures had lower survivorship and delayed development under extended exposure to higher pH treatments (pH 7.5 and pH 8.0), whereas cultures maintained in lower pH (7.0) displayed stable population growth over time. Reciprocal transplants between treatments demonstrated that these pH effects were reversible. Life histories were distinct between populations, and there were differences in the magnitudes of pH effects on development and culture growth that persisted through multiple generations. These results suggest that T. californicus might not have the generalist physiology that might be expected of an intertidal species, and it could be adapted to lower average pH conditions than those that occur in adjacent open waters.
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Barrick A, Champeau O, Butler J, Wiles T, Boundy M, Tremblay LA. Investigating the Ecotoxicity of Select Emerging Organic Contaminants Toward the Marine Copepod Gladioferens pectinatus. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:792-799. [PMID: 34918376 DOI: 10.1002/etc.5275] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 11/29/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Estuarine ecosystems are recipients of anthropogenic stressors released from land-based activities. The aim of the present study was to investigate the ecotoxicological hazards of organic contaminants toward the estuarine copepod Gladioferens pectinatus using acute and chronic testing. Most chemicals demonstrated acute toxicity and influenced development of the copepods. Further research should be conducted to investigate these chemicals and their mixtures using long-term, multigenerational testing to characterize mechanisms of toxicity. Environ Toxicol Chem 2022;41:792-799. © 2022 SETAC.
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Affiliation(s)
| | | | | | | | | | - Louis A Tremblay
- Cawthron Institute, Nelson, New Zealand
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
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Barrick A, Laroche O, Boundy M, Pearman JK, Wiles T, Butler J, Pochon X, Smith KF, Tremblay LA. First transcriptome of the copepod Gladioferens pectinatus subjected to chronic contaminant exposures. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 243:106069. [PMID: 34968986 DOI: 10.1016/j.aquatox.2021.106069] [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: 08/27/2021] [Revised: 11/19/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Contaminants are often at low concentrations in ecosystems and their effects on exposed organisms can occur over long periods of time and across multiple generations. Alterations to subcellular mechanistic pathways in response to exposure to contaminants can provide insights into mechanisms of toxicity that methods measuring higher levels of biological may miss. Analysis of the whole transcriptome can identify novel mechanisms of action leading to impacts in exposed biota. The aim of this study was to characterise how exposures to copper, benzophenone and diclofenac across multiple generations altered molecular expression pathways in the marine copepod Gladioferens pectinatus. Results of the study demonstrated differential gene expression was observed in cultures exposure to diclofenac (569), copper (449) and benzophenone (59). Pathways linked to stress, growth, cellular and metabolic processes were altered by exposure to all three contaminants with genes associated with oxidative stress and xenobiotic regulation also impacted. Protein kinase functioning, cytochrome P450, transcription, skeletal muscle contraction/relaxation, mitochondrial phosphate translocator, protein synthesis and mitochondrial methylation were all differentially expressed with all three chemicals. The results of the study also suggested that using dimethyl sulfoxide as a dispersant influenced the transcriptome and future research may want to investigate it's use in molecular studies. Data generated in this study provides a first look at transcriptomic response of G. pectinatus exposed to contaminants across multiple generations, future research is needed to validate the identified biomarkers and link these results to apical responses such as population growth to demonstrate the predictive capacity of molecular tools.
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Affiliation(s)
- Andrew Barrick
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand.
| | - Olivier Laroche
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand
| | - Michael Boundy
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand
| | - John K Pearman
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand
| | - Tanja Wiles
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand
| | - Juliette Butler
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand
| | - Xavier Pochon
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand; Institute of Marine Science, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Kirsty F Smith
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Louis A Tremblay
- Cawthron Institute, 98 Halifax Street East, Nelson 7010, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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Kadiene EU, Ouddane B, Gong HY, Hwang JS, Souissi S. Multigenerational study of life history traits, bioaccumulation, and molecular responses of Pseudodiaptomus annandalei to cadmium. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 230:113171. [PMID: 34999339 DOI: 10.1016/j.ecoenv.2022.113171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 12/28/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Metal pollution provide a substantial challenge for environmental health. This study investigated the multigeneration effects of cadmium on populations of the copepod species Pseudodiaptomus annandalei, exposed to a sublethal concentration, 40 µg/L of cadmium (Cd), over 10 generations. At the end of each generation, copepod individuals were collected to estimate fecundity, bioaccumulation, and real time qPCR quantification of selected differentially expressed genes to evaluate Cd effects and sex-specific responses of copepods across multiple generations. Our results revealed a sex-specific accumulation of Cd integrating 10 successive generations. The concentration of Cd was significantly higher (p < 0.05) in males than in females. We also observed a generational increase in Cd accumulation. Fecundity increased, with the exception of the first generation, possibly as a compensation for a decrease of copepod population size under Cd exposure. Protein expression of copepods exposed to Cd occurred in a sex-specific manner. Hemerythrin was mostly up-regulated in both copepod sexes exposed to Cd with males having the highest expression levels, while heat shock protein 70 was mostly up-regulated in males and down-regulated in female copepods, both exposed to Cd. Although copepods are known to develop adaptive mechanisms to tolerate toxic chemicals, continuous exposure to metals could lead to the bioaccumulation of metals in their offspring through maternal transfer and direct uptake from the medium over several generations. As a consequence, increased metal concentrations in copepods could result in physiological damage, reducing their fitness, and possibly compromise copepod population structures. This study showed that mortality, life history traits and molecular responses of a copepod species provided important toxicological endpoints and bio-markers for environmental risk assessments. Environmental pressure resulting from continuous exposure to persistent pollutants like Cd, could have evolutionary significance. The tendency for copepods to selectively adapt to a toxic environment through modifications, could increase their chance of survival over a long term.
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Affiliation(s)
- Esther U Kadiene
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR 8187 - LOG - Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000 Lille, France; Institute of Marine Biology, National Taiwan Ocean University, 20224 Keelung, Taiwan
| | - Baghdad Ouddane
- Université de Lille, Equipe Physico-Chimie de l'Environnement, Laboratoire LASIR UMR CNRS 8516, 59655 Villeneuve d'Ascq Cedex, France
| | - Hong-Yi Gong
- Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan
| | - Jiang-Shiou Hwang
- Institute of Marine Biology, National Taiwan Ocean University, 20224 Keelung, Taiwan; Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung 20224, Taiwan.
| | - Sami Souissi
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR 8187 - LOG - Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, F-59000 Lille, France.
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8
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Siddique A, Shahid N, Liess M. Multiple Stress Reduces the Advantage of Pesticide Adaptation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:15100-15109. [PMID: 34730333 DOI: 10.1021/acs.est.1c02669] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Under global change scenarios, multistress conditions may occur regularly and require adaptation. However, the adaptation to one stressor might be associated with the increased sensitivity to another stressor. Here, we investigated the ecological consequences of such trade-off under multiple stress. We compared the pesticide tolerance of the crustacean Gammarus pulex from agricultural streams with populations from reference streams. Under optimum temperature, G. pulex from agricultural streams were considerably more tolerant to pesticides as compared to the reference populations. Here, we assume that the increased tolerance in agricultural populations is the combination of acclimation, epigenetic effect, and genetic evolution. After experimental pre-exposure to very low concentration (LC50/1000), reference populations showed increased pesticide tolerance. In contrast, pre-exposure did not further increase the tolerance of agricultural populations. Moreover, these populations were more sensitive to elevated temperature alone due to the hypothesized fitness cost of genetic adaptation to pesticides. However, both reference and agricultural populations showed a similar tolerance to the combined stress of pesticides and warming due to stronger synergistic effects in adapted populations. As a result, pesticide adaptation loses its advantage. The combined effect was predicted well using the stress addition model, developed for predicting the synergistic interaction of independent stressors. We conclude that under multistress conditions, adaptation to pesticides reduces the general stress capacity of individuals and trade-off processes increase the sensitivity to additional stressors. This causes strong synergistic effects of additional stressors on pesticide-adapted individuals.
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Affiliation(s)
- Ayesha Siddique
- Department of System-Ecotoxicology, Helmholtz Centre for Environmental Research─UFZ, Permoserstraße 15, Leipzig 04318, Germany
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - Naeem Shahid
- Department of System-Ecotoxicology, Helmholtz Centre for Environmental Research─UFZ, Permoserstraße 15, Leipzig 04318, Germany
- Department of Evolutionary Ecology and Environmental Toxicology, Goethe University Frankfurt, Max-von-Laue-Street 13, Frankfurt am Main 60438, Germany
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus, Vehari 61100, Pakistan
| | - Matthias Liess
- Department of System-Ecotoxicology, Helmholtz Centre for Environmental Research─UFZ, Permoserstraße 15, Leipzig 04318, Germany
- Institute for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
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Intergenerational Patterns of DNA Methylation in Procambarus clarkii Following Exposure to Genotoxicants: A Conjugation in Past Simple or Past Continuous? TOXICS 2021; 9:toxics9110271. [PMID: 34822662 PMCID: PMC8618669 DOI: 10.3390/toxics9110271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/15/2021] [Accepted: 10/18/2021] [Indexed: 12/31/2022]
Abstract
Epigenome is susceptible to modulation by environmental pressures—namely, through alterations in global DNA methylation, impacting the organism condition and, ultimately, reverberating on the phenotype of the subsequent generations. Hence, an intergenerational study was conducted, aiming to clarify the influence of genotoxicants on global DNA methylation of the crayfish Procambarus clarkii. Two subsequent generations were exposed to the herbicide penoxsulam (Px; 23 µg·L−1) and to the genotoxicant model ethyl methanesulfonate (EMS; 5 mg·L−1). Px did not induce changes in DNA methylation of adult crayfish (F0). However, the hypomethylation occurring in unexposed F1 juveniles demonstrated that the history of exposure per se can modulate epigenome. In F1 descendants of the Px-exposed group, methylome (hypermethylated) was more affected in males than in females. EMS-induced hypomethylation in adult females (F0), also showed gender specificity. In addition, hypomethylation was also observed in the unexposed F1 crayfish, indicating an intergenerational epigenetic effect. The modulatory role of past exposure to penoxsulam or to EMS also showed a dependency on the crayfish developmental stage. Overall, this research revealed that indirect experiences (events occurring in a predecessor generation) can have an impact even greater than direct experiences (present events) on the epigenetic dynamics.
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Wang M, Chen J, Lee YH, Lee JS, Wang D. Projected near-future ocean acidification decreases mercury toxicity in marine copepods. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 284:117140. [PMID: 33930777 DOI: 10.1016/j.envpol.2021.117140] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 03/05/2021] [Accepted: 04/10/2021] [Indexed: 06/12/2023]
Abstract
Here, we examined the combinational effect of ocean acidification (OA) and mercury (Hg) in the planktonic copepod Pseudodiaptomus annandalei in cross-factored response to different pCO2 (400, 800 μatm) and Hg (control, 1.0 and 2.5 μg/L) exposures for three generations (F0-F2), followed by single-generation recovery (F3) under clean condition. Several phenotypic traits and Hg accumulation were analyzed for F0-F3. Furthermore, shotgun-based quantitative proteomics was performed for F0 and F2. Our results showed that OA insignificantly influenced the traits. During F0-F2, combined exposure reduced Hg accumulation as compared with the counterpart Hg treatment, supporting the mitigating effect of OA on Hg toxicity in copepods. Proteomics analysis indicated that the copepods probably increased energy production/storage and stress response to ensure physiological resilience against OA. However, Hg induced many toxic events (e.g., energy depletion and degenerated organomorphogenesis/embryogenesis for F0; cell cycle arrest and detrimental stress-defense for F2), which were translated to the population-level adverse outcome, i.e., compromised growth/reproduction. Particularly, compensatory proteome response was identified (e.g., increased immune defense for F0; energetic compensation and enhanced embryogenesis for F2), accounting for a negative interaction between OA and Hg. Together, this study provides the molecular mechanisms behind the effects of OA and Hg pollution in marine copepods.
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Affiliation(s)
- Minghua Wang
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China.
| | - Jingyan Chen
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
| | - Young Hwan Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Dazhi Wang
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
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11
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Castaño-Sánchez A, Pereira JL, Gonçalves FJM, Reboleira ASPS. Sensitivity of a widespread groundwater copepod to different contaminants. CHEMOSPHERE 2021; 274:129911. [PMID: 33979935 DOI: 10.1016/j.chemosphere.2021.129911] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/11/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Groundwater is an indispensable resource for humankind and sustainable biomes functioning. Anthropogenic disturbance threatens groundwater ecosystems globally, but to which extent groundwater organisms respond to stressors remains poorly understood. Groundwater animals are rare, with small populations, difficult to find and to breed in the lab, which poses a main challenge to the assessment of their responses to pollutants. Despite the difficulties, assessing the toxicity of a large spectrum of stressors to groundwater organisms is a priority to inform towards appropriate environmental protection of these ecosystems. We tested the sensitivity to CuSO4, diclofenac, and NaCl of a groundwater population of the copepod Diacyclops crassicaudis crassicaudis and compared its sensitivity with the model organism Daphnia magna. We ranked its sensitivity using a species sensitivity distribution (SSD) approach using the feasible data available for groundwater and surface crustaceans. Our results show that the most toxic compound was CuSO4 for which higher amount of data was recorded and wider variability in response was observed. It was followed by diclofenac, largely lacking data for groundwater-adapted organisms, and the least toxic compound was NaCl. The differential sensitivity between D. crassicaudis and D. magna was contaminant-dependent. As a general trend D. crassicaudis was always distributed in the upper part of the SSD curves together with other groundwater-adapted organisms. Our results highlight that the widespread groundwater populations of the D. crassicaudis species complex, which can be successfully breed in the lab, may provide a reasonable approach to assess the ecological effects of anthropogenic stressors in groundwater ecosystems.
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Affiliation(s)
| | | | | | - Ana Sofia P S Reboleira
- Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark; Centre for Ecology, Evolution and Environmental Changes (cE3c), and Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal.
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12
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Rodríguez-Romero A, Viguri JR, Calosi P. Acquiring an evolutionary perspective in marine ecotoxicology to tackle emerging concerns in a rapidly changing ocean. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 764:142816. [PMID: 33092841 DOI: 10.1016/j.scitotenv.2020.142816] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Tens of thousands of anthropogenic chemicals and wastes enter the marine environment each year as a consequence of the ever-increasing anthropogenic activities and demographic growth of the human population, which is majorly concentrated along coastal areas. Marine ecotoxicology has had a crucial role in helping shed light on the fate of chemicals in the environment, and improving our understanding of how they can affect natural ecosystems. However, chemical contamination is not occurring in isolation, but rather against a rapidly changing environmental horizon. Most environmental studies have been focusing on short-term within-generation responses of single life stages of single species to single stressors. As a consequence, one-dimensional ecotoxicology cannot enable us to appreciate the degree and magnitude of future impacts of chemicals on marine ecosystems. Current approaches that lack an evolutionary perspective within the context of ongoing and future local and global stressors will likely lead us to under or over estimations of the impacts that chemicals will exert on marine organisms. It is therefore urgent to define whether marine organisms can acclimate, i.e. adjust their phenotypes through transgenerational plasticity, or rapidly adapt, i.e. realign the population phenotypic performances to maximize fitness, to the new chemical environment within a selective horizon defined by global changes. To foster a significant advancement in this research area, we review briefly the history of ecotoxicology, synthesis our current understanding of the fate and impact of contaminants under global changes, and critically discuss the benefits and challenges of integrative approaches toward developing an evolutionary perspective in marine ecotoxicology: particularly through a multigenerational approach. The inclusion of multigenerational studies in Ecological Risk Assessment framework (ERA) would provide significant and more accurately information to help predict the risks of pollution in a rapidly changing ocean.
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Affiliation(s)
- Araceli Rodríguez-Romero
- Departamento de Química Analítica, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Río San Pedro, Puerto Real, 11510 Cádiz, Spain; Departamento de Ecología y Gestión Costera, Instituto de Ciencias Marinas de Andalucía (CSIC), Campus Universitario Río San Pedro, 11519 Puerto Real, Spain.
| | - Javier R Viguri
- Green Engineering & Resources Research Group (GER), Departamento de Química e Ingeniería de Procesos y Recursos, ETSIIT, Universidad de Cantabria, Avda. de los Castros s/n, 39005 Santander, Cantabria, Spain
| | - Piero Calosi
- Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada
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13
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Hong H, Wang J, Shi D. Effects of salinity on the chronic toxicity of 4-methylbenzylidene camphor (4-MBC) in the marine copepod Tigriopus japonicus. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 232:105742. [PMID: 33460951 DOI: 10.1016/j.aquatox.2021.105742] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 12/09/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
Organic ultraviolet filters are widely used in personal care products. 4-methylbenzylidene camphor (4-MBC) is one of the most frequently used UV filters. Due to its widespread usage 4-MBC has been detected at high concentrations in offshore waters. Previous toxicological studies have suggested that 4-MBC might induce much higher toxicity in marine organisms than freshwater species. To explore the effects of salinity on 4-MBC toxicity, the marine copepod Tigriopus japonicus was used as the model species, as it plays an important role in marine ecosystems and can be adapted to a wide range of salinity conditions. T. japonicus were adapted to three different salinity conditions (i.e., 20, 30 and 40 ppt) prior to exposure to 0, 1, and 5 μg L-1 4-MBC for multiple generations (F0-F3). Results showed that environmentally relevant concentrations of 4-MBC had toxic effects on T. japonicus and therefore, can pose a significant risk to marine copepods in the natural environment. In addition, increasing salinity levels increased the lethal, developmental and reproductive toxicities of 4-MBC in T. japonicus. This was because that higher salinity levels increased the uptake rate constant and bioconcentration factor of 4-MBC and also further exacerbated the oxidative stress induced by exposure to 4-MBC in T. japonicus. Our study demonstrated that understanding how salinity affects the toxicity of 4-MBC is important for accurate assessment of the risk of 4-MBC in the aquatic environments.
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Affiliation(s)
- Haizheng Hong
- State Key Laboratory of Marine Environmental Science and College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China; Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen, 361102, China.
| | - Jiaxin Wang
- State Key Laboratory of Marine Environmental Science and College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Dalin Shi
- State Key Laboratory of Marine Environmental Science and College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
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14
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Elizabeth Alter S, Tariq L, Creed JK, Megafu E. Evolutionary responses of marine organisms to urbanized seascapes. Evol Appl 2021; 14:210-232. [PMID: 33519966 PMCID: PMC7819572 DOI: 10.1111/eva.13048] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 12/19/2022] Open
Abstract
Many of the world's major cities are located in coastal zones, resulting in urban and industrial impacts on adjacent marine ecosystems. These pressures, which include pollutants, sewage, runoff and debris, temperature increases, hardened shorelines/structures, and light and acoustic pollution, have resulted in new evolutionary landscapes for coastal marine organisms. Marine environmental changes influenced by urbanization may create new selective regimes or may influence neutral evolution via impacts on gene flow or partitioning of genetic diversity across seascapes. While some urban selective pressures, such as hardened surfaces, are similar to those experienced by terrestrial species, others, such as oxidative stress, are specific to aquatic environments. Moreover, spatial and temporal scales of evolutionary responses may differ in the ocean due to the spatial extent of selective pressures and greater capacity for dispersal/gene flow. Here, we present a conceptual framework and synthesis of current research on evolutionary responses of marine organisms to urban pressures. We review urban impacts on genetic diversity and gene flow and examine evidence that marine species are adapting, or are predicted to adapt, to urbanization over rapid evolutionary time frames. Our findings indicate that in the majority of studies, urban stressors are correlated with reduced genetic diversity. Genetic structure is often increased in urbanized settings, but artificial structures can also act as stepping stones for some hard-surface specialists, promoting range expansion. Most evidence for rapid adaptation to urban stressors comes from studies of heritable tolerance to pollutants in a relatively small number of species; however, the majority of marine ecotoxicology studies do not test directly for heritability. Finally, we highlight current gaps in our understanding of evolutionary processes in marine urban environments and present a framework for future research to address these gaps.
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Affiliation(s)
- S. Elizabeth Alter
- Department of Biology & ChemistryCalifornia State University, Monterey BayChapman Academic Science CenterSeasideCAUSA
- Department of BiologyYork CollegeCity University of New YorkJamaicaNYUSA
- Department of IchthyologyAmerican Museum of Natural HistoryNew YorkNYUSA
| | - Laraib Tariq
- Department of BiologyYork CollegeCity University of New YorkJamaicaNYUSA
| | - James Keanu Creed
- Department of BiologyYork CollegeCity University of New YorkJamaicaNYUSA
- Department of IchthyologyAmerican Museum of Natural HistoryNew YorkNYUSA
| | - Emmanuel Megafu
- Department of BiologyYork CollegeCity University of New YorkJamaicaNYUSA
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15
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Dong DT, Miranda AF, Carve M, Shen H, Trestrail C, Dinh KV, Nugegoda D. Population- and sex-specific sensitivity of the marine amphipod Allorchestes compressa to metal exposure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111130. [PMID: 32866889 DOI: 10.1016/j.ecoenv.2020.111130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/31/2020] [Accepted: 08/01/2020] [Indexed: 06/11/2023]
Abstract
The sensitivity to contaminants of natural populations varies greatly depending on their historical exposure and on the sex of the individual. These factors result in great uncertainty in ecotoxicological risk assessments and challenge the protection of marine biodiversity. This study investigated the role of background pollution in the environment in shaping the sensitivity of males and females of the common marine amphipod Allorchestes compressa to the common trace marine pollutant, copper (Cu). Female and male amphipods were collected from two sites: Geelong (the polluted site) and Clifton Springs (the clean site). Amphipods were exposed to Cu treatments of 0, 50, 100, and 250 μg/L for 10 days, followed by a 10-day recovery period. Cu-exposed males from Geelong showed a reduction in feeding rate at a higher Cu concentration than males from Clifton Springs, suggesting that they have a higher tolerance to Cu than males from Clifton Springs. This can be explained by their higher base level of metallothioneins (MTs) and glutathione-S-transferase (GST), the key physiological responses for detoxification and defence against damages from Cu toxicity. Males showed a higher tolerance to Cu than females. This pattern was similar in both populations, which may be associated with a higher level of GST. During the recovery period, only males from Geelong fully recovered to the control level. Our results emphasize the importance of considering population- and sex-specific sensitivity of invertebrates to contaminants in ecotoxicological risk assessments.
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Affiliation(s)
- Dung Thi Dong
- Ecotoxicology Research Group, School of Applied Science, RMIT University, Melbourne, Australia; Department of Marine Conservation, Research Institute for Marine Fisheries, Hai Phong, Viet Nam.
| | - Ana F Miranda
- Ecotoxicology Research Group, School of Applied Science, RMIT University, Melbourne, Australia
| | - Megan Carve
- Ecotoxicology Research Group, School of Applied Science, RMIT University, Melbourne, Australia
| | - Hao Shen
- Ecotoxicology Research Group, School of Applied Science, RMIT University, Melbourne, Australia
| | - Charlene Trestrail
- Ecotoxicology Research Group, School of Applied Science, RMIT University, Melbourne, Australia
| | - Khuong V Dinh
- School of Biological Science, Washington State University, USA; Department of Fisheries Biology, Nha Trang University, Viet Nam
| | - Dayanthi Nugegoda
- Ecotoxicology Research Group, School of Applied Science, RMIT University, Melbourne, Australia
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16
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Das S, Ouddane B, Hwang JS, Souissi S. Intergenerational effects of resuspended sediment and trace metal mixtures on life cycle traits of a pelagic copepod. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115460. [PMID: 32892010 DOI: 10.1016/j.envpol.2020.115460] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/15/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
Multiple stressors like metal toxicity, organic compounds and sediment pollution from the Seine estuary are raising concern and novel toxicological approaches are needed to better assess and monitor the risk. In the present study, the copepod Eurytemora affinis from the Seine, was exposed to two different sources of contaminants, which were resuspended polluted sediments and a mixture of trace metals (dissolved phase). The exposure continued for four generations (F0, F1, F2, F3) where F0 is a generation for acclimation to the exposure condition and F3 is a generation for decontamination followed without any exposure, to detect possible maternal carryover effects of pollutants (F0 - F2) and the role of recovery (in F3). Higher accumulation of metals resulted in higher mortalities at both exposure conditions, with particularly F1 being the most sensitive generation showing highest bioaccumulation of metals, highest mortality, and smallest population size. Copper accumulation was highest of all metals in mixture from both the resuspended sediment and the combined trace metal treatment. A significantly lower naupliar production was seen in copepods exposed to resuspended sediment compared to trace metal exposed copepods. However, the decontamination phase (F3) indicated that E. affinis pre-exposed to resuspended sediment had a higher ability to recover the total population size, increase naupliar production, and depurate accumulated Cu. The population exposed to a trace metal mixture showed lower recovery and lower ability to discharge accumulated toxic metals indicating its greater effect on our experimental model when compared to resuspended sediment.
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Affiliation(s)
- Shagnika Das
- Univ. Lille, CNRS, Univ, Littoral Côte D'Opale, UMR 8187, LOG - Laboratoire D'Océanologie et de Géosciences, F- 59000, Lille, France; Université de Lille, LASIRE (UMR CNRS 8516), Equipe Physico-chimie de L'Environnement, Bâtiment C8, 59655, Villeneuve D'Ascq Cedex, France
| | - Baghdad Ouddane
- Université de Lille, LASIRE (UMR CNRS 8516), Equipe Physico-chimie de L'Environnement, Bâtiment C8, 59655, Villeneuve D'Ascq Cedex, France
| | - Jiang-Shiou Hwang
- Institute of Marine Biology, National Taiwan Ocean University, Keelung, 20224, Taiwan; Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung, 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Sami Souissi
- Univ. Lille, CNRS, Univ, Littoral Côte D'Opale, UMR 8187, LOG - Laboratoire D'Océanologie et de Géosciences, F- 59000, Lille, France.
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17
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Heery EC, Oh RKE, Taira D, Ng D, Chim CK, Hartanto RS, Hsiung AR, Chai TMF, Loke LHL, Yeo HHJ, Todd PA. Human-engineered hydrodynamic regimes as a driver of cryptic microinvertebrate assemblages on urban artificial shorelines. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 725:138348. [PMID: 32302835 DOI: 10.1016/j.scitotenv.2020.138348] [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: 10/01/2019] [Revised: 02/02/2020] [Accepted: 03/29/2020] [Indexed: 06/11/2023]
Abstract
Urban shorelines undergo substantial hydrodynamic changes as a result of coastal engineering and shoreline armouring that can alter sedimentation, turbidity, and other factors. These changes often coincide with major shifts in the composition and distribution of marine biota, however, rarely are hydrodynamic-mediated factors confirmed experimentally as the mechanism underpinning these shifts. This study first characterized hydrodynamic-related distribution patterns among epilithic and epiphytic microinvertebrates on urban seawalls in Singapore. We found reduced microinvertebrate abundances and distinct microinvertebrate community structure within benthic turf algae in areas where coastal defences had reduced wave energy and increased sediment deposition, among other hydrodynamic-related abiotic changes. Low-exposure areas also had reduced densities of macroinvertebrate grazers and less dense turf algae (lower mass per cm2) than adjacent high-exposure areas. Using harpacticoid copepods as a model taxon, we performed a reciprocal transplant experiment to discern between the effects of exposure-related conditions and grazing. Results from the experiment indicate that conditions associated with restricted wave energy from shoreline engineering limit harpacticoid population densities, as transplantation to low-exposure areas led to rapid reductions in abundance. At the same time, we found no effect from grazer exclusion cages, suggesting harpacticoids are minimally impacted by exposure-related gradients in gastropod macrograzer densities over short time scales. Given the key role of intertidal microinvertebrates, particularly harpacticoids, in nearshore food webs, we postulate that human-engineered hydrodynamic regimes are an important factor shaping marine ecosystem functioning in urban areas.
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Affiliation(s)
- Eliza C Heery
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore.
| | - Rachel K E Oh
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - Daisuke Taira
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - Dillen Ng
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - C K Chim
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore; Keppel-NUS Corporate Laboratory, Faculty of Engineering, National University of Singapore, Block E1A, #03-03, 1 Engineering Drive 2, Singapore 117576, Singapore; St. John's Island National Marine Laboratory, Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, Singapore 119227, Singapore
| | - Rania S Hartanto
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - Amanda R Hsiung
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - Tiffany M F Chai
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore; School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth PL4 8AA, United Kingdom
| | - Lynette H L Loke
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - Hannah H J Yeo
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
| | - Peter A Todd
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Block S3, Singapore 117558, Singapore
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18
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Dayras P, Bialais C, Ouddane B, Lee JS, Souissi S. Effects of different routes of exposure to metals on bioaccumulation and population growth of the cyclopoid copepod Paracyclopina nana. CHEMOSPHERE 2020; 248:125926. [PMID: 32006827 DOI: 10.1016/j.chemosphere.2020.125926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
We examined effects of the three metals cadmium (Cd), copper (Cu), and nickel (Ni) on two subpopulations of the cyclopoid copepod Paracyclopina nana. We sought to investigate the effects of metal exposure on population growth and structure of P. nana and to understand the parameters affecting the metal bioaccumulation in copepods. A first experiment tested the hypothesis of competition between these metals in a mixture using a P. nana mass culture in 10 L beakers with the sublethal concentrations (1/3 of LC50) as determined for E. affinis. A second experiment pursued the same with a P. nana population which was adapted to a higher Cu concentration for several generations (226.9 ± 15.9 μg g-1 dw Cu in copepods) and using the proper sublethal concentrations for P. nana. After 96 h of exposure, results from the first experiment showed a decreasing population growth and instead of an increasing metal accumulation in copepods. Cd also appeared to be more accumulated when it was alone, confirming the hypothesis of metal competition in mixture. Results from the second experiment revealed less marked effects. When metal concentrations increased in the treatment it decreased in copepods, indicating depuration activity in the population already adapted to metal exposure. This paper is the first one investigating the parameters affecting the bioaccumulation capacity of P. nana in response to metals. It offers a better understanding of copepod responses to metal contamination in a complex aquatic environment.
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Affiliation(s)
- Paul Dayras
- Université de Lille, CNRS, Université du Littoral Côte d'Opale, UMR 8187 LOG, Laboratoire d'Océanologie et de Géosciences, F-62930, Wimereux, France.
| | - Capucine Bialais
- Université de Lille, CNRS, Université du Littoral Côte d'Opale, UMR 8187 LOG, Laboratoire d'Océanologie et de Géosciences, F-62930, Wimereux, France.
| | - Baghdad Ouddane
- Université de Lille, UMR CNRS 8516, Laboratoire LASIR, Equipe Physico-Chimie de l'Environnement, F-59655, Villeneuve d'Ascq Cedex, France.
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea.
| | - Sami Souissi
- Université de Lille, CNRS, Université du Littoral Côte d'Opale, UMR 8187 LOG, Laboratoire d'Océanologie et de Géosciences, F-62930, Wimereux, France.
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19
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Zhang C, Jeong CB, Lee JS, Wang D, Wang M. Transgenerational Proteome Plasticity in Resilience of a Marine Copepod in Response to Environmentally Relevant Concentrations of Microplastics. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:8426-8436. [PMID: 31246436 DOI: 10.1021/acs.est.9b02525] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Here, we examined the multigenerational effect of microplastics (6-μm polystyrene beads; with different environmentally relevant concentrations of 0.023 and 0.23 mg/L in seawater) on the marine copepod Tigriopus japonicus under two-generation exposure (F0-F1) followed by one-generation recovery (F2) in clean seawater. Also, the seven life-history traits (survival, sex ratio, developmental time of nauplius phase, developmental time to maturation, number of clutches, number of nauplii/clutch, and fecundity) were measured for each generation. Furthermore, to investigate within-generation proteomic response and transgenerational proteome plasticity, proteome profiling was conducted for the F1 and F2 copepods under the control and 0.23 mg/L microplastics treatment. The results showed successful ingestion of microplastics in F0-F1 under both exposure concentrations, while higher concentration (0.23 mg/L) of microplastics resulted in the significant reduction in survival rate, number of nauplii/clutch, and fecundity. However, the affected traits were totally restored in the recovery generation (F2). Proteomic analysis demonstrated that microplastics exposure increased several cellular biosynthesis processes and, in turn, reduced energy storage due to the trade-off, hence compromising survival and reproduction of the treated copepods in F1. Interestingly, the two-generational effect of microplastics in copepods had significant transgenerational proteome plasticity as demonstrated by increased energy metabolism and stress-related defense pathway, which accounts for regaining of the compromised phenotypic traits during recovery (i.e., F2). Overall, this study provides a molecular understanding on the effect of microplastics at a translational level under long-term multigenerational exposure in marine copepods, and also the transgenerational proteome plasticity is likely rendering the robustness of copepods in response to microplastics pollution.
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Affiliation(s)
- Chen Zhang
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology , Xiamen University , Xiamen 361102 , China
| | - Chang-Bum Jeong
- Department of Biological Science, College of Science , Sungkyunkwan University , Suwon 16419 , South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science , Sungkyunkwan University , Suwon 16419 , South Korea
| | - Dazhi Wang
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology , Xiamen University , Xiamen 361102 , China
| | - Minghua Wang
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology , Xiamen University , Xiamen 361102 , China
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies , Xiamen University , Xiamen 361102 , China
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20
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Todd PA, Heery EC, Loke LHL, Thurstan RH, Kotze DJ, Swan C. Towards an urban marine ecology: characterizing the drivers, patterns and processes of marine ecosystems in coastal cities. OIKOS 2019. [DOI: 10.1111/oik.05946] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Peter A. Todd
- Experimental Marine Ecology Laboratory, Dept of Biological Sciences, National Univ. of Singapore 16 Science Drive 4 Singapore 117558
| | - Eliza C. Heery
- Experimental Marine Ecology Laboratory, Dept of Biological Sciences, National Univ. of Singapore 16 Science Drive 4 Singapore 117558
| | - Lynette H. L. Loke
- Experimental Marine Ecology Laboratory, Dept of Biological Sciences, National Univ. of Singapore 16 Science Drive 4 Singapore 117558
| | - Ruth H. Thurstan
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, Univ. of Exeter Penryn UK
| | - D. Johan Kotze
- Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research Programme, Univ. of Helsinki Lahti Finland
| | - Christopher Swan
- Dept of Geography & Environmental Systems, Univ. of Maryland Baltimore County Baltimore MD USA
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21
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Foley HB, Sun PY, Ramirez R, So BK, Venkataraman YR, Nixon EN, Davies KJA, Edmands S. Sex-specific stress tolerance, proteolysis, and lifespan in the invertebrate Tigriopus californicus. Exp Gerontol 2019; 119:146-156. [PMID: 30738921 DOI: 10.1016/j.exger.2019.02.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 01/04/2019] [Accepted: 02/06/2019] [Indexed: 11/30/2022]
Abstract
Because stress tolerance and longevity are mechanistically and phenotypically linked, the sex with higher acute stress tolerance might be expected to also live longer. On the other hand, the association between stress tolerance and lifespan may be complicated by tradeoffs between acute tolerance and long-term survival. Here we use the copepod Tigriopus californicus to test for sex differences in stress resistance, proteolytic activity and longevity. Unlike many model organisms, this species does not have sex chromosomes. However, substantial sex differences were still observed. Females were found to have superior tolerance to a range of acute stressors (high temperature, high salinity, low salinity, copper and bisphenol A (BPA)) across a variety of treatments including different populations, pure vs. hybrid crosses, and different shading environments. Upregulation of proteolytic capacity - one molecular mechanism for responding to acute stress - was also found to be sexually dimorphic. In the combined stress treatment of chronic copper exposure followed by acute heat exposure, proteolytic capacity was suppressed for males. Females, however, maintained a robust proteolytic stress response. While females consistently showed greater tolerance to short-term stress, lifespan was largely equivalent between the two sexes under both benign conditions and mild thermal stress. Our findings indicate that short-term stress tolerance does not predict long-term survival under relatively mild conditions.
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Affiliation(s)
- Helen B Foley
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA
| | - Patrick Y Sun
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA; Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center, University of Southern California, Los Angeles, CA 90089, USA
| | - Rocio Ramirez
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA
| | - Brandon K So
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA
| | - Yaamini R Venkataraman
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA
| | - Emily N Nixon
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA
| | - Kelvin J A Davies
- Leonard Davis School of Gerontology of the Ethel Percy Andrus Gerontology Center, University of Southern California, Los Angeles, CA 90089, USA; Molecular & Computational Biology Division, Department of Biological Sciences, College of Letters, Arts, and Sciences, University of Southern California, Los Angeles, CA 90089, USA; Department of Biochemistry and Molecular Medicine, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA 90089, USA
| | - Suzanne Edmands
- Department of Biological Sciences, Wrigley Institute for Environmental Studies, University of Southern California, Los Angeles, CA 90089, USA.
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22
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Ribeiro MJ, Scott-Fordsmand JJ, Amorim MJB. Multigenerational exposure to cobalt (CoCl2) and WCCo nanoparticles in Enchytraeus crypticus. Nanotoxicology 2019; 13:751-760. [DOI: 10.1080/17435390.2019.1570374] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Maria J. Ribeiro
- Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal
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23
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Fuller N, Ford AT, Nagorskaya LL, Gudkov DI, Smith JT. Reproduction in the freshwater crustacean Asellus aquaticus along a gradient of radionuclide contamination at Chernobyl. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 628-629:11-17. [PMID: 29427871 DOI: 10.1016/j.scitotenv.2018.01.309] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/29/2018] [Accepted: 01/29/2018] [Indexed: 05/14/2023]
Abstract
Nuclear accidents such as Chernobyl and Fukushima have led to contamination of the environment that will persist for many years. The consequences of chronic low-dose radiation exposure for non-human organisms inhabiting contaminated environments remain unclear. In radioecology, crustaceans are important model organisms for the development of environmental radioprotection. Previous laboratory studies have demonstrated deleterious effects of radiation exposure on crustacean reproduction. However, no studies have documented the effects of chronic radiation exposure on the reproduction of natural crustacean populations. Based on data from laboratory exposures, we hypothesised that populations of the freshwater isopod Asellus aquaticus exposed to radiation for thirty years at Chernobyl would display reduced reproductive output and altered timing of reproduction. To test this hypothesis, A. aquaticus was collected from six lakes at Chernobyl over two years with total dose rates ranging from 0.06-27.1μGy/h. No significant differences in the fecundity, mass of broods or proportion of reproducing female A. aquaticus were recorded. Significant differences in the body mass of gravid females were recorded suggesting different timings of reproduction, however this was not related to radiation contamination. No significant effect of a range of environmental parameters on A. aquaticus reproduction was recorded. Our data suggests current dose rates at Chernobyl are not causing discernible effects on the reproductive output of A. aquaticus. This study is the first to assess the effects of chronic low-dose radiation exposure on the reproductive output of an aquatic invertebrate at Chernobyl. These findings are consistent with proposed radiological protection benchmarks for the maintenance of wildlife populations and will assist in management of environments impacted by radiation.
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Affiliation(s)
- Neil Fuller
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire PO4 9LY, UK
| | - Alex T Ford
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire PO4 9LY, UK
| | - Liubov L Nagorskaya
- Applied Science Center for Bioresources of the National Academy of Sciences of Belarus, 27 Academicheskaya Str., 220072 Minsk, Belarus
| | - Dmitri I Gudkov
- Department of Freshwater Radioecology, Institute of Hydrobiology, Geroyev Stalingrada Ave. 12, UA-04210 Kiev, Ukraine
| | - Jim T Smith
- School of Earth & Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, Hampshire PO1 3QL, UK.
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Wang M, Jeong CB, Lee YH, Lee JS. Effects of ocean acidification on copepods. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 196:17-24. [PMID: 29324394 DOI: 10.1016/j.aquatox.2018.01.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 12/22/2017] [Accepted: 01/04/2018] [Indexed: 06/07/2023]
Abstract
Ocean acidification (OA) leads to significant changes in seawater carbon chemistry, broadly affects marine organisms, and considered as a global threat to the fitness of marine ecosystems. Due to the crucial role of copepods in marine food webs of transferring energy from primary producers to higher trophic levels, numerous studies have been conducted to examine the impacts of OA on biological traits of copepods such as growth and reproduction. Under OA stress, the copepods demonstrated species-specific and stage-dependent responses. Notably, different populations of the same copepod species demonstrated different sensitivities to the increased pCO2. In copepods, the deleterious effects of OA are also reinforced by other naturally occurring co-stressors (e.g., thermal stress, food deprivation, and metal pollution). Given that most OA stress studies have focused on the effects of short-term exposure (shorter than a single generation), experiments using adults might have underestimated the damaging effects of OA and the long-term multigenerational exposure to multiple stressors (e.g., increased pCO2 and food shortage) will be required. Particularly, omics-based technologies (e.g., genomics, proteomics, and metabolomics) will be helpful to better understand the underlying processes behind biological responses (e.g., survival, development, and offspring production) at the mechanistic level which will improve our predictions of the responses of copepods to climate change stressors including OA.
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Affiliation(s)
- Minghua Wang
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, Xiamen, 361102, China.
| | - Chang-Bum Jeong
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Young Hwan Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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25
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Vogt ÉL, Model JFA, Vinagre AS. Effects of Organotins on Crustaceans: Update and Perspectives. Front Endocrinol (Lausanne) 2018; 9:65. [PMID: 29535684 PMCID: PMC5835110 DOI: 10.3389/fendo.2018.00065] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 02/13/2018] [Indexed: 12/17/2022] Open
Abstract
Organotins (OTs) are considered some of the most toxic chemicals introduced into aquatic environments by anthropogenic activities. They are widely used for agricultural and industrial purposes and as antifouling additives on boat hull's paints. Even though the use of OTs was banned in 2008, elevated levels of OTs can still be detected in aquatic environments. OTs' deleterious effects upon wildlife and experimental animals are well documented and include endocrine disruption, immunotoxicity, neurotoxicity, genotoxicity, and metabolic dysfunction. Crustaceans are key members of zooplankton and benthic communities and have vital roles in food chains, so the endocrine-disrupting effects of tributyltin (TBT) on crustaceans can affect other organisms. TBT can disrupt carbohydrate and lipid homeostasis of crustaceans by interacting with retinoid X receptor (RXR) and crustacean hyperglycemic hormone (CHH) signaling. Moreover, it can also interact with other nuclear receptors, disrupting methyl farnesoate and ecdysteroid signaling, thereby altering growth and sexual maturity, respectively. This compound also interferes in cytochrome P450 system disrupting steroid synthesis and reproduction. Crustaceans are also important fisheries worldwide, and its consumption can pose risks to human health. However, some questions remain unanswered. This mini review aims to update information about the effects of OTs on the metabolism, growth, and reproduction of crustaceans; to compare with known effects in mammals; and to point aspects that still needs to be addressed in future studies. Since both macrocrustaceans and microcrustaceans are good models to study the effects of sublethal TBT contamination, novel studies should be developed using multibiomarkers and omics technology.
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Affiliation(s)
- Éverton L. Vogt
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Jorge F. A. Model
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Anapaula S. Vinagre
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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26
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Wang M, Zhang C, Lee JS. Quantitative Shotgun Proteomics Associates Molecular-Level Cadmium Toxicity Responses with Compromised Growth and Reproduction in a Marine Copepod under Multigenerational Exposure. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:1612-1623. [PMID: 29323882 DOI: 10.1021/acs.est.8b00149] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this study, the copepod Tigriopus japonicus was exposed to different cadmium (Cd) treatments (0, 2.5, 5, 10, and 50 μg/L in seawater) for five generations (F0-F4), followed by a two-generation (F5-F6) recovery period in clean seawater. Six life-history traits (survival, developmental time of nauplius phase, developmental time to maturation, number of clutches, number of nauplii/clutch, and fecundity) were examined for each generation. Metal accumulation was also analyzed for generations F0-F6. Additionally, proteome profiling was performed for the control and 50 μg/L Cd-treated F4 copepods. In F0-F4 copepods, Cd accumulated in a concentration-dependent manner, prolonging the development of the nauplius phase and maturation and reducing the number of nauplii/clutch and fecundity. However, during F5-F6, Cd accumulation decreased rapidly, and significant but subtle effects on growth and reproduction were observed only for the highest metal treatment at F5. Proteomic analysis revealed that Cd treatment had several toxic effects including depressed nutrient absorption, dysfunction in cellular redox homeostasis and metabolism, and oxidative stress, resulting in growth retardation and reproduction limitation in this copepod species. Taken together, our results demonstrate the relationship between molecular toxicity responses and population-level adverse outcomes in T. japonicus under multigenerational Cd exposure.
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Affiliation(s)
- Minghua Wang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems/College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Chen Zhang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems/College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
| | - Jae-Seong Lee
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems/College of the Environment & Ecology, Xiamen University , Xiamen 361102, China
- Department of Biological Science, College of Science, Sungkyunkwan University , Suwon 16419, South Korea
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Sun PY, Foley HB, Wu L, Nguyen C, Chaudhry S, Bao VWW, Leung KMY, Edmands S. Long-term laboratory culture causes contrasting shifts in tolerance to two marine pollutants in copepods of the genus Tigriopus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:3183-3192. [PMID: 29019110 DOI: 10.1007/s11356-017-0398-z] [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: 05/16/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Organismal chemical tolerance is often used to assess ecological risk and monitor water quality, yet tolerance can differ between field- and lab-raised organisms. In this study, we examined how tolerance to copper (Cu) and tributyltin oxide (TBTO) in two species of marine copepods, Tigriopus japonicus and T. californicus, changed across generations under benign laboratory culture (in the absence of pre-exposure to chemicals). Both copepod species exhibited similar chemical-specific changes in tolerance, with laboratory maintenance resulting in increased Cu tolerance and decreased TBTO tolerance. To assess potential factors underlying these patterns, chemical tolerance was measured in conjunction with candidate environmental variables (temperature, UV radiation, diet type, and starvation). The largest chemical-specific effect was found for starvation, which decreased TBTO tolerance but had no effect on Cu tolerance. Understanding how chemical-specific tolerance can change in the laboratory will be critical in strengthening bioassays and their applications for environmental protection and chemical management.
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Affiliation(s)
- Patrick Y Sun
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA.
| | - Helen B Foley
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
| | - Leslie Wu
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
| | - Charlene Nguyen
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
| | - Shiven Chaudhry
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
| | - Vivien W W Bao
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kenneth M Y Leung
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
- State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Suzanne Edmands
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
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28
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Chen L, Li X, Hong H, Shi D. Multigenerational effects of 4-methylbenzylidene camphor (4-MBC) on the survival, development and reproduction of the marine copepod Tigriopus japonicus. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 194:94-102. [PMID: 29172130 DOI: 10.1016/j.aquatox.2017.11.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 11/13/2017] [Accepted: 11/15/2017] [Indexed: 06/07/2023]
Abstract
One of the most widely used organic UV filters, 4-methylbenzylidene camphor (4-MBC), is present at high concentrations in offshore waters. The marine copepod Tigriopus japonicus was exposed to different concentrations of 4-MBC (i.e., 0, 0.5, 1, 5 and 10μgL-1) for 4 consecutive generations (F0-F3) to evaluate the impact of 4-MBC on marine ecosystems. The results showed that in the F0 generation, 4-MBC caused significant lethal toxicity in T. japonicas at concentrations of 5 and 10μgL-1 and the nauplii were more sensitive to 4-MBC toxicity than the adults. However in the F1-F3 generations, 4-MBC exposure did not affect the survival rate. The hatching rate and the developmental duration from the nauplii to the copepodite (N-C) and from the nauplii to adult (N-A) decreased significantly in the F1-F2 generations and in the F2-F3 generations, respectively, even at the lowest exposure concentration (0.5μgL-1). In the subsequent two generations (i.e., the F4-F5 generations) of recovery exposure in clean seawater, the growth rates of the original 4-MBC exposure groups were still faster than the control in both the N-C and N-A stages, suggesting possible transgenerational genetic and/or epigenetic changes upon chronic 4-MBC exposure. The expression of the ecdysone receptor gene was up-regulated by 4-MBC, which was consistent with the decrease of the N-C/N-A duration. In addition, 4-MBC may induce oxidative stress and trigger apoptosis in T. japonicas, resulting in developmental, reproductive and even lethal toxicity. A preliminary risk assessment suggested that under environmentally realistic concentrations, 4-MBC had significant potential to pose a threat to marine crustaceans and marine ecosystems.
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Affiliation(s)
- Leyun Chen
- State Key Laboratory of Marine Environmental Science and College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Xiaolin Li
- State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Haizheng Hong
- State Key Laboratory of Marine Environmental Science and College of the Environment and Ecology, Xiamen University, Xiamen 361102, China; Center for Marine Environmental Chemistry and Toxicology, Xiamen University, Xiamen 361102, China.
| | - Dalin Shi
- State Key Laboratory of Marine Environmental Science and College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
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29
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Leong W, Sun PY, Edmands S. Latitudinal Clines in Temperature and Salinity Tolerance in Tidepool Copepods. J Hered 2017; 109:71-77. [DOI: 10.1093/jhered/esx061] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 07/13/2017] [Indexed: 12/21/2022] Open
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30
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Fuller N, Smith JT, Nagorskaya LL, Gudkov DI, Ford AT. Does Chernobyl-derived radiation impact the developmental stability of Asellus aquaticus 30years on? THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 576:242-250. [PMID: 27788439 DOI: 10.1016/j.scitotenv.2016.10.097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 10/11/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
Effects of long-term, environmentally relevant doses of radiation on biota remain unclear due to a lack of studies following chronic exposure in contaminated environments. The 1986 Chernobyl accident dispersed vast amounts of radioactivity into the environment which persists to date. Despite three decades of research, impacts of the incident on non-human organisms continues to be contested within the scientific literature. The present study assessed the impact of chronic radiation exposure from Chernobyl on the developmental stability of the model aquatic isopod, Asellus aquaticus using fluctuating asymmetry (FA) as an indicator. Fluctuating asymmetry, defined as random deviations from the expected perfect bilateral symmetry of an organism, has gained prominence as an indicator of developmental stability in ecotoxicology. Organisms were collected from six lakes along a gradient of radionuclide contamination in Belarus and the Ukraine. Calculated total dose rates ranged from 0.06-27.1μGy/h. Fluctuating asymmetry was assessed in four meristic and one metrical trait. Significant differences in levels of pooled asymmetry were recorded between sample sites independent of sex and specific trait measured. However, there was no correlation of asymmetry with radiation doses, suggesting that differences in asymmetry were not attributed to radionuclide contamination and were driven by elevated asymmetry at a single site. No correlation between FA and measured environmental parameters suggested a biotic factor driving observed FA differences. This study appears to be the first to record no evident increase in developmental stability of biota from the Chernobyl region. These findings will aid in understanding the response of organisms to chronic pollutant exposure and the long term effects of large scale nuclear incidents such as Chernobyl and Fukushima.
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Affiliation(s)
- Neil Fuller
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire PO4 9LY, UK
| | - Jim T Smith
- School of Earth & Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth, Hampshire PO1 3QL, UK
| | - Liubov L Nagorskaya
- Applied Science Center for Bioresources of the National Academy of Sciences of Belarus, 27 Academicheskaya Str., 220072 Minsk, Belarus
| | - Dmitri I Gudkov
- Department of Freshwater Radioecology, Institute of Hydrobiology, Geroyev Stalingrada Ave. 12, UA-04210 Kiev, Ukraine
| | - Alex T Ford
- Institute of Marine Sciences, School of Biological Sciences, University of Portsmouth, Ferry Road, Portsmouth, Hampshire PO4 9LY, UK.
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31
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Xu X, Shi L, Wang M. Comparative quantitative proteomics unveils putative mechanisms involved into mercury toxicity and tolerance in Tigriopus japonicus under multigenerational exposure scenario. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 218:1287-1297. [PMID: 27593353 DOI: 10.1016/j.envpol.2016.08.087] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/24/2016] [Accepted: 08/31/2016] [Indexed: 06/06/2023]
Abstract
In our earlier work, Tigriopus japonicus were subjected to different mercuric chloride treatments (0-50 μg/L in the seawater) for five generations (F0-F4), and they were subsequently resumed under clean environments for one generation, i.e., F5. Accumulative effects were hypothesized to participate in mercury (Hg) multigenerational toxicity, however phenotypic plasticity could be responsible for metal resistance in this copepod against the long term exposure. Here, we specifically investigated the proteome profiles in the F0, F2, and F5 copepods of the control and 50 μg/L metal treatment, respectively, so as to elucidate the action mechanisms for Hg toxicity/tolerance in T. japonicus under the long term exposure. Functional enrichment analysis showed that a quite different proteomic response was observed in F5 compared with F0 and F2. Namely, the vast majority of enrichments were correlated with the down-regulated proteins in F0 and F2, whereas the enrichments for F5 were mostly attributable to the up-regulated proteins, suggesting that different mechanisms are responsible for Hg toxicity and tolerance (i.e., phenotypic plasticity). Hg toxicity prohibited many proteins in F0 and F2 which are related to several critical processes/pathways, e.g., protein translation, macromolecule metabolic process, DNA replication, cell cycle, cuticle organization, vitellogenesis, etc. In F5, many up-regulated proteins were enriched into compensatory systems, such as carbohydrate metabolism, myosin reorganizations, and stress-related defense pathway. Notably, glycolysis (an oxygen-independent pathway) was enhanced for energy allocation into metal detoxification and tolerance. Taken together, proteomics provides novel mechanistic insights into phenotypic plasticity used by T. japonicus when challenged with cumulative effects due to Hg multigenerational toxicity.
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Affiliation(s)
- Xiaoqun Xu
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, China; Second Institute of Oceanography, State Oceanic Administration People's Republic of China, Hangzhou, 310012, China
| | - Lin Shi
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, China
| | - Minghua Wang
- Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, China; Center for Marine Environmental Chemistry and Toxicology, College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China.
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32
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Falfushynska H, Gnatyshyna L, Yurchak I, Stoliar O, Sokolova IM. Interpopulational variability of molecular responses to ionizing radiation in freshwater bivalves Anodonta anatina (Unionidae). THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 568:444-456. [PMID: 27310535 DOI: 10.1016/j.scitotenv.2016.05.175] [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: 04/02/2016] [Revised: 05/23/2016] [Accepted: 05/24/2016] [Indexed: 06/06/2023]
Abstract
Freshwater ecosystems are exposed to multiple anthropogenic stressors including chemical pollution and warming that can affect health of the resident organisms and their responses to novel challenges. We investigated the of in situ exposure history on molecular responses to a novel stressor, ionizing radiation, in unionid mollusks Anodonta anatina. Males from pristine (F-), agricultural (A-) sites and a cooling reservoir of a nuclear power plant (N-site) were exposed to acute low dose (2mGy) X-ray radiation followed by 14days of recovery (R-groups) or to control conditions (C-groups). Biomarkers of oxidative stress, geno-, cyto- and neurotoxicity were used to assess cellular injury and stress. Control group from the cooling reservoir (CN) had higher background levels of caspase-3 activity, metallothionein concentrations and nuclear lesions and lower levels of superoxide dismutase (SOD) and glutathione in the gills compared to other control groups (CF and CA). Irradiation induced cellular damage in mussels from all three sites including increased levels of nuclear lesions in hemocytes, depletion of caspase-3, suppression of superoxide dismutase and catalase activities, an increase of the lipid peroxidation and oxidized glutathione levels, as well as down-regulation of cholinesterase indicating neurotoxicity. The up-regulation of ethoxyresorufin-O-deethylase activity in the digestive gland and vitellogenin-like protein level in gonads were also found in radiation-exposed groups indicating feminization of males and disturbances of xenobiotic metabolism. The RA-group showed the greatest magnitude of radiation-induced stress responses compared to the other two groups. Overall, unionid mollusks, particularly those from a chronically polluted agricultural site, were highly sensitive to low-dose radiation (2mGy) indicating limitations of stress protection mechanisms to deal with multiple stressors.
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Affiliation(s)
- H Falfushynska
- Research Laboratory of Comparative Biochemistry and Molecular Biology, Ternopil National Pedagogical University, 2, Kryvonosa Str, Ternopil 46027, Ukraine; Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223, USA; Department of General Chemistry, I.Ya. Horbachevsky Ternopil State Medical University, 1, Maidan Voli, Ternopil 46001, Ukraine
| | - L Gnatyshyna
- Research Laboratory of Comparative Biochemistry and Molecular Biology, Ternopil National Pedagogical University, 2, Kryvonosa Str, Ternopil 46027, Ukraine; Department of General Chemistry, I.Ya. Horbachevsky Ternopil State Medical University, 1, Maidan Voli, Ternopil 46001, Ukraine
| | - I Yurchak
- Research Laboratory of Comparative Biochemistry and Molecular Biology, Ternopil National Pedagogical University, 2, Kryvonosa Str, Ternopil 46027, Ukraine
| | - O Stoliar
- Research Laboratory of Comparative Biochemistry and Molecular Biology, Ternopil National Pedagogical University, 2, Kryvonosa Str, Ternopil 46027, Ukraine
| | - I M Sokolova
- Department of Biological Sciences, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, NC 28223, USA.
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Sun PY, Foley HB, Bao VWW, Leung KMY, Edmands S. Variation in tolerance to common marine pollutants among different populations in two species of the marine copepod Tigriopus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:16143-16152. [PMID: 26070741 DOI: 10.1007/s11356-015-4846-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 06/04/2015] [Indexed: 06/04/2023]
Abstract
Geographical variation in chemical tolerance within a species can significantly influence results of whole animal bioassays, yet a literature survey showed that the majority of articles using bioassays did not provide detail on the original field collection site of their test specimens confounding the ability for accurate replication and comparison of results. Biological variation as a result of population-specific tolerance, if not addressed, can be misinterpreted as experimental error. Our studies of two marine copepod species, Tigriopus japonicus and Tigriopus californicus, found significant intra- and inter-specific variation in tolerance to copper and tributyltin. Because both species tolerate copper concentrations orders of magnitude higher than those found in coastal waters, difference in copper tolerance may be a by-product of adaptation to other stressors such as high temperature. Controlling for inter-population tolerance variation will greatly strengthen the application of bioassays in chemical toxicity tests.
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Affiliation(s)
- Patrick Y Sun
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA.
| | - Helen B Foley
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
| | - Vivien W W Bao
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kenneth M Y Leung
- The Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong, China
- State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Suzanne Edmands
- Department of Biological Science and Wrigley Institute for Environmental Studies, University of Southern California, 3616 Trousdale PKWY STE 107, Los Angeles, CA, 90089, USA
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Bini G, Santini G, Chelazzi G. Pre-exposure to Cadmium or Zinc Alters the Heart Rate Response of the Crayfish Procambarus clarkii Towards Copper. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 95:12-17. [PMID: 25859835 DOI: 10.1007/s00128-015-1535-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 03/30/2015] [Indexed: 06/04/2023]
Abstract
Exposure to sub-lethal concentrations of a pollutant induces, in some organisms, an acclimation process which increases their resistance to other substances (cross-acclimation). Understanding this phenomenon is important as a basis for a better comprehension of the effects of pollutants in ecosystems. In this paper we investigated whether the exposure to Cd or Zn is able to modify the heart rate response of the crayfish Procambarus clarkii to acute Cu stress. A first set of experiments provided the basis to understand heart rate changes induced by varying Cd or Zn concentrations. In a second set of experiments crayfish were acclimated for 96 h to control water, Cd or Zn enriched water, and then exposed to a 10 mg L(-1) Cu solution, known to induce bradycardia in this species. Bradycardia was suppressed in specimens previously exposed to Cd or Zn but not in those exposed to clean water, providing a clear evidence of a cross-acclimation in the heart rate response of P. clarkii.
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Affiliation(s)
- Giada Bini
- Department of Biology, University of Florence, Via Madonna del Piano 6, 50019, Sesto Fiorentino, Italy
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