1
|
Zhao F, Huang Y, Wei H, Wang M. Ocean acidification alleviated nickel toxicity to a marine copepod under multigenerational scenarios but at a cost with a loss of transcriptome plasticity during recovery. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 942:173585. [PMID: 38810735 DOI: 10.1016/j.scitotenv.2024.173585] [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: 03/31/2024] [Revised: 05/24/2024] [Accepted: 05/26/2024] [Indexed: 05/31/2024]
Abstract
Marine ecosystem has been experiencing multiple stressors caused by anthropogenic activities, including ocean acidification (OA) and nickel (Ni) pollution. Here, we examined the individual/combined effects of OA (pCO2 1000 μatm) and Ni (6 μg/L) exposure on a marine copepod Tigriopus japonicus for six generations (F1-F6), followed by one-generation recovery (F7) in clean seawater. Ni accumulation and several important phenotypic traits were measured in each generation. To explore within-generation response and transgenerational plasticity, we analyzed the transcriptome profile for the copepods of F6 and F7. The results showed that Ni exposure compromised the development, reproduction and survival of copepods during F1-F6, but its toxicity effects were alleviated by OA. Thus, under OA and Ni combined exposure, due to their antagonistic interaction, the disruption of Ca2+ homeostasis, and the inhibition of calcium signaling pathway and oxytocin signaling pathway were not found. However, as a cost of acclimatization/adaption potential to long-term OA and Ni combined exposure, there was a loss of transcriptome plasticity during recovery, which limited the resilience of copepods to previously begin environments. Overall, our work fosters a comprehensive understanding of within- and transgenerational effects of climatic stressor and metal pollution on marine biota.
Collapse
Affiliation(s)
- Fankang Zhao
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Yuehan Huang
- School of International Education, Beijing University of Chemical Technology, Beijing 102200, China
| | - Hui Wei
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China
| | - Minghua Wang
- Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment & Ecology, Xiamen University, Xiamen 361102, China.
| |
Collapse
|
2
|
Gostyukhina OL, Gavruseva TV, Tkachuk AA, Chelebieva ES, Podolskaya MS, Borovkov AB, Bogacheva EA, Lavrichenko DS, Kladchenko ES, Yu AA. How water acidification influences the organism antioxidant capacity and gill structure of Mediterranean mussel (Mytilus galloprovincialis, Lamarck, 1819) at normoxia and hypoxia. Comp Biochem Physiol A Mol Integr Physiol 2024; 296:111682. [PMID: 38908680 DOI: 10.1016/j.cbpa.2024.111682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/11/2024] [Accepted: 06/19/2024] [Indexed: 06/24/2024]
Abstract
The effect of water acidification in combination with normoxia or hypoxia on the antioxidant capacity and oxidative stress markers in gills and hemolymph of the Mediterranean mussel (Mytilus galloprovincialis), as well as on gill microstructure, has been evaluated through an in vivo experiment. Mussels were exposed to a low pH (7.3) under normal dissolved oxygen (DO) conditions (8 mg/L), and hypoxia (2 mg/L) for 8 days, and samples were collected on days 1, 3, 6, and 8 to evaluate dynamic changes of physiological responses. Cytoplasmic concentrations of reactive oxygen species (ROS) and levels of DNA damage were measured in hemocytes, while the activity of catalase (CAT) and superoxide dismutase (SOD) and histopathological changes were assessed in gills. The results revealed that while water acidification did not significantly affect the activity of SOD and CAT in gills under normoxic and hypoxic conditions, there was a trend towards suppression of CAT activity at the end of the experimental period (day 8). Similarly, we did not observe increased formation of ROS in hemocytes or changes in the levels of DNA damage during the experimental period. These results strongly suggest that the oxidative stress response system in mussels is relatively stable to experimental conditions of acidification and hypoxia. Experimental acidification under normoxia and hypoxia caused changes to the structure of the gills, leading to various histopathological alterations, including dilation, hemocyte infiltration into the hemal sinuses, intercellular edema, vacuolization of epithelial cells in gill filaments, lipofuscin accumulation, changes in the shape and adjacent gill filaments, hyperplasia, exfoliation of the epithelial layer, necrosis, swelling, and destruction of chitinous layers (chitinous rods). Most of these alterations were reversible, non-specific changes that represent a general inflammatory response and changes in the morphology of the gill filaments. The dynamics of histopathological alterations suggests an active adaptive response of gills to environmental stresses. Taken together, our data indicate that Mediterranean mussels have a relative tolerance to water acidification and hypoxia at tissue and cellular levels.
Collapse
Affiliation(s)
- O L Gostyukhina
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - T V Gavruseva
- Laboratory of Aquatic Ecotoxicology, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - A A Tkachuk
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - E S Chelebieva
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - M S Podolskaya
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - A B Borovkov
- Department of Biotechnology and Phytoresources, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - E A Bogacheva
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - D S Lavrichenko
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| | - E S Kladchenko
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia.
| | - Andreyeva A Yu
- Laboratory of Ecological Immunology of Aquatic Organisms, A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS, Nakhimov Ave, 2, Sevastopol 299000, Russia
| |
Collapse
|
3
|
Ni Z, Liu J, Cui W, Cao L, Dou S. Interactive impacts of CO 2-induced seawater acidification and cadmium exposure on antioxidant defenses of juvenile tongue sole Cynoglossus semilaevis. MARINE POLLUTION BULLETIN 2024; 201:116284. [PMID: 38522335 DOI: 10.1016/j.marpolbul.2024.116284] [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: 12/21/2023] [Revised: 03/19/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
Antioxidant responses of juvenile sole exposed to seawater acidification (SA) and Cd were investigated. SA increased lipid peroxidation (LPO) in the fish, independent of Cd concentrations. Cd at medium and high levels inflated LPO under no or moderate SA conditions. This effect was absent under high SA levels, due to SA effect exceeding and obscuring Cd effect. SA and Cd collaborated to provoke LPO, with SOD and CAT being stimulated to defend against oxidative stress, while those related to GSH redox cycle were inhibited under SA exposure. Responses of GSH-related antioxidants to Cd impact varied contingent on their interactions with SA. This defensive strategy was insufficient to protect fish from increased LPO. Antioxidants responded more sensitively to SA than Cd exposure. GSH, GR, SOD and CAT are sensitive biomarkers for SA conditions. The findings offer insights into assessing fish's antioxidant defense strategy under Cd and SA circumstances in natural habitats.
Collapse
Affiliation(s)
- Zhilin Ni
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Jinhu Liu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Wenting Cui
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100039, China; Fisheries College, Tianjin Agricultural University, Tianjin 300380, China
| | - Liang Cao
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Shuozeng Dou
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100039, China.
| |
Collapse
|
4
|
Xu J, Zhao R, Liu A, Li L, Li S, Li Y, Qu M, Di Y. To live or die: "Fine-tuning" adaptation revealed by systemic analyses in symbiotic bathymodiolin mussels from diverse deep-sea extreme ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170434. [PMID: 38278266 DOI: 10.1016/j.scitotenv.2024.170434] [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: 10/16/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 01/28/2024]
Abstract
Hydrothermal vents (HVs) and cold seeps (CSs) are typical deep-sea extreme ecosystems with their own geochemical characteristics to supply the unique living conditions for local communities. Once HVs or CSs stop emission, the dramatic environmental change would pose survival risks to deep-sea organisms. Up to now, limited knowledge has been available to understand the biological responses and adaptive strategy to the extreme environments and their transition from active to extinct stage, mainly due to the technical difficulties and lack of representative organisms. In this study, bathymodiolin mussels, the dominant and successful species surviving in diverse deep-sea extreme ecosystems, were collected from active and extinct HVs (Southwest Indian Ocean) or CSs (South China Sea) via two individual cruises. The transcriptomic analysis and determination of multiple biological indexes in stress defense and metabolic systems were conducted in both gills and digestive glands of mussels, together with the metagenomic analysis of symbionts in mussels. The results revealed the ecosystem- and tissue-specific transcriptional regulation in mussels, addressing the autologous adaptations in antioxidant defense, energy utilization and key compounds (i.e. sulfur) metabolism. In detail, the successful antioxidant defense contributed to conquering the oxidative stress induced during the unavoidable metabolism of xenobiotics commonly existing in the extreme ecosystems; changes in metabolic rate functioned to handle toxic matters in different surroundings; upregulated gene expression of sulfide:quinone oxidoreductase indicated an active sulfide detoxification in mussels from HVs and active stage of HVs & CSs. Coordinately, a heterologous adaptation, characterized by the functional compensation between symbionts and mussels in energy utilization, sulfur and carbon metabolism, was also evidenced by the bacterial metagenomic analysis. Taken together, a new insight was proposed that symbiotic bathymodiolin mussels would develop a "finetuning" strategy combining the autologous and heterologous regulations to fulfill the efficient and effective adaptations for successful survival.
Collapse
Affiliation(s)
- Jianzhou Xu
- Ocean College, Zhejiang University, Zhoushan 316000, China; Hainan Institute of Zhejiang University, Sanya 572024, China
| | - Ruoxuan Zhao
- Ocean College, Zhejiang University, Zhoushan 316000, China
| | - Ao Liu
- Ocean College, Zhejiang University, Zhoushan 316000, China
| | - Liya Li
- Ocean College, Zhejiang University, Zhoushan 316000, China; Hainan Institute of Zhejiang University, Sanya 572024, China
| | - Shuimei Li
- Ocean College, Zhejiang University, Zhoushan 316000, China
| | - Yichen Li
- Ocean College, Zhejiang University, Zhoushan 316000, China
| | - Mengjie Qu
- Ocean College, Zhejiang University, Zhoushan 316000, China; Hainan Institute of Zhejiang University, Sanya 572024, China
| | - Yanan Di
- Ocean College, Zhejiang University, Zhoushan 316000, China; Hainan Institute of Zhejiang University, Sanya 572024, China.
| |
Collapse
|