101
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Pousse E, Poach ME, Redman DH, Sennefelder G, White LE, Lindsay JM, Munroe D, Hart D, Hennen D, Dixon MS, Li Y, Wikfors GH, Meseck SL. Energetic response of Atlantic surfclam Spisula solidissima to ocean acidification. MARINE POLLUTION BULLETIN 2020; 161:111740. [PMID: 33128982 DOI: 10.1016/j.marpolbul.2020.111740] [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: 07/07/2020] [Revised: 10/02/2020] [Accepted: 10/03/2020] [Indexed: 06/11/2023]
Abstract
In this study, we assessed the Atlantic surfclam (Spisula solidissima) energy budget under different ocean acidification conditions (OA). During 12 weeks, 126 individuals were maintained at three different ρCO2 concentrations. Every two weeks, individuals were sampled for physiological measurements and scope for growth (SFG). In the high ρCO2 treatment, clearance rate decreased and excretion rate increased relative to the low ρCO2 treatment, resulting in reduced SFG. Moreover, oxygen:nitrogen (O:N) excretion ratio dropped, suggesting that a switch in metabolic strategy occurred. The medium ρCO2 treatment had no significant effects upon SFG; however, metabolic loss increased, suggesting a rise in energy expenditure. In addition, a significant increase in food selection efficiency was observed in the medium treatment, which could be a compensatory reaction to the metabolic over-costs. Results showed that surfclams are particularly sensitive to OA; however, the different compensatory mechanisms observed indicate that they are capable of some temporary resilience.
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Affiliation(s)
- Emilien Pousse
- National Research Council Post-Doctoral Associate at NOAA NMFS, 212 Rogers Ave., Milford, CT 06418, USA.
| | - Matthew E Poach
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Dylan H Redman
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - George Sennefelder
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Lauren E White
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Jessica M Lindsay
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Daphne Munroe
- Haskin Shellfish Research Laboratory, Rutgers University, 6959 Miller Ave., Port Norris, NJ 8349, USA
| | - Deborah Hart
- NOAA/NMFS, 166 Water St. Woods Hole, MA 02543, USA
| | | | - Mark S Dixon
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Yaqin Li
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Gary H Wikfors
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
| | - Shannon L Meseck
- NOAA Fisheries Service, Northeast Fisheries Science Center, 212 Rogers Ave, Milford, CT 06460, USA
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102
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de Bruijn DS, Ter Braak PM, Van de Waal DB, Olthuis W, van den Berg A. Coccolithophore calcification studied by single-cell impedance cytometry: Towards single-cell PIC:POC measurements. Biosens Bioelectron 2020; 173:112808. [PMID: 33221507 DOI: 10.1016/j.bios.2020.112808] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 11/06/2020] [Indexed: 12/29/2022]
Abstract
Since the industrial revolution 30% of the anthropogenic CO2 is absorbed by oceans, resulting in ocean acidification, which is a threat to calcifying algae. As a result, there has been profound interest in the study of calcifying algae, because of their important role in the global carbon cycle. The coccolithophore Emiliania huxleyi is considered to be globally the most dominant calcifying algal species, which creates a unique exoskeleton from inorganic calcium carbonate platelets. The PIC (particulate inorganic carbon): POC (particulate organic carbon) ratio describes the relative amount of inorganic carbon in the algae and is a critical parameter in the ocean carbon cycle. In this research we explore the use of microfluidic single-cell impedance spectroscopy in the field of calcifying algae. Microfluidic impedance spectroscopy enables us to characterize single-cell electrical properties in a non-invasive and label-free way. We use the ratio of the impedance at high frequency vs. low frequency, known as opacity, to discriminate between calcified coccolithophores and coccolithophores with a calcite exoskeleton dissolved by acidification (decalcified). We have demonstrated that using opacity we can discriminate between calcified and decalcified coccolithophores with an accuracy of 94.1%. We have observed a correlation between the measured opacity and the cell height in the channel, which is supported by FEM simulations. The difference in cell density between calcified and decalcified cells can explain the difference in cell height and therefore the measured opacity.
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Affiliation(s)
- Douwe S de Bruijn
- BIOS Lab-on-a-Chip Group, MESA+ Institute, Max Planck Center for Complex Fluid Dynamics, University of Twente, P.O. Box 217, AE Enschede, 7500, the Netherlands.
| | - Paul M Ter Braak
- BIOS Lab-on-a-Chip Group, MESA+ Institute, Max Planck Center for Complex Fluid Dynamics, University of Twente, P.O. Box 217, AE Enschede, 7500, the Netherlands
| | - Dedmer B Van de Waal
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, PB Wageningen, 6708, the Netherlands
| | - Wouter Olthuis
- BIOS Lab-on-a-Chip Group, MESA+ Institute, Max Planck Center for Complex Fluid Dynamics, University of Twente, P.O. Box 217, AE Enschede, 7500, the Netherlands
| | - Albert van den Berg
- BIOS Lab-on-a-Chip Group, MESA+ Institute, Max Planck Center for Complex Fluid Dynamics, University of Twente, P.O. Box 217, AE Enschede, 7500, the Netherlands
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103
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Ross T, Du Preez C, Ianson D. Rapid deep ocean deoxygenation and acidification threaten life on Northeast Pacific seamounts. GLOBAL CHANGE BIOLOGY 2020; 26:6424-6444. [PMID: 32777119 PMCID: PMC7693292 DOI: 10.1111/gcb.15307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/24/2020] [Accepted: 07/27/2020] [Indexed: 05/14/2023]
Abstract
Anthropogenic climate change is causing our oceans to lose oxygen and become more acidic at an unprecedented rate, threatening marine ecosystems and their associated animals. In deep-sea environments, where conditions have typically changed over geological timescales, the associated animals, adapted to these stable conditions, are expected to be highly vulnerable to any change or direct human impact. Our study coalesces one of the longest deep-sea observational oceanographic time series, reaching back to the 1960s, with a modern visual survey that characterizes almost two vertical kilometers of benthic seamount ecosystems. Based on our new and rigorous analysis of the Line P oceanographic monitoring data, the upper 3,000 m of the Northeast Pacific (NEP) has lost 15% of its oxygen in the last 60 years. Over that time, the oxygen minimum zone (OMZ), ranging between approximately 480 and 1,700 m, has expanded at a rate of 3.0 ± 0.7 m/year (due to deepening at the bottom). Additionally, carbonate saturation horizons above the OMZ have been shoaling at a rate of 1-2 m/year since the 1980s. Based on our visual surveys of four NEP seamounts, these deep-sea features support ecologically important taxa typified by long life spans, slow growth rates, and limited mobility, including habitat-forming cold water corals and sponges, echinoderms, and fish. By examining the changing conditions within the narrow realized bathymetric niches for a subset of vulnerable populations, we resolve chemical trends that are rapid in comparison to the life span of the taxa and detrimental to their survival. If these trends continue as they have over the last three to six decades, they threaten to diminish regional seamount ecosystem diversity and cause local extinctions. This study highlights the importance of mitigating direct human impacts as species continue to suffer environmental changes beyond our immediate control.
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Affiliation(s)
- Tetjana Ross
- Institute of Ocean Sciences, Fisheries and Oceans Canada (DFO)SidneyBCCanada
| | - Cherisse Du Preez
- Institute of Ocean Sciences, Fisheries and Oceans Canada (DFO)SidneyBCCanada
| | - Debby Ianson
- Institute of Ocean Sciences, Fisheries and Oceans Canada (DFO)SidneyBCCanada
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104
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Wang X, Wang M, Wang W, Liu Z, Xu J, Jia Z, Chen H, Qiu L, Lv Z, Wang L, Song L. Transcriptional changes of Pacific oyster Crassostrea gigas reveal essential role of calcium signal pathway in response to CO 2-driven acidification. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 741:140177. [PMID: 32570066 DOI: 10.1016/j.scitotenv.2020.140177] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/07/2020] [Accepted: 06/10/2020] [Indexed: 06/11/2023]
Abstract
There is increasing evidence that ocean acidification (OA) has a significant impact on marine organisms. However, the ability of most marine organisms to acclimate to OA and the underlying mechanisms are still not well understood. In the present study, whole transcriptome analysis was performed to compare the impacts of short- (7 days, named as short group) and long- (60 days, named as long group) term CO2 exposure (pH 7.50) on Pacific oyster Crassostrea gigas. The responses of C. gigas to short- and long-term CO2 exposure shared common mechanisms in metabolism, membrane-associated transportation and binding processes. Long-term CO2 exposure induced significant expression of genes involved in DNA or RNA binding, indicating the activated transcription after long-term CO2 exposure. Oysters in the short-term group underwent significant intracellular calcium variation and oxidative stress. In contrast, the intracellular calcium, ROS level in hemocytes and H2O2 in serum recovered to normal levels after long-term CO2 exposure, suggesting the compensation of physiological status and mutual interplay between calcium and oxidative level. The compensation was supported by the up-regulation of a series of calcium binding proteins (CBPs) and calmodulins (CaMs) related signal pathway. The results provided valuable information to understand the molecular mechanism underlying the responses of Pacific oyster to the acidified ocean and might have implications for predicting the possible effects of global climate changes on oyster aquaculture.
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Affiliation(s)
- Xiudan Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Mengqiang Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Weilin Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Zhaoqun Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Jiachao Xu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Zhihao Jia
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Hao Chen
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Limei Qiu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Zhao Lv
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China; Dalian Key Laboratory of Aquatic Animal Diseases Prevention and Control, Dalian Ocean University, Dalian 116023, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China; Dalian Key Laboratory of Aquatic Animal Diseases Prevention and Control, Dalian Ocean University, Dalian 116023, China.
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105
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Zhang X, Guo J, Wu S, Chen F, Yang Y. Divalent heavy metals and uranyl cations incorporated in calcite change its dissolution process. Sci Rep 2020; 10:16864. [PMID: 33033272 PMCID: PMC7546630 DOI: 10.1038/s41598-020-73555-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/16/2020] [Indexed: 11/09/2022] Open
Abstract
Due to the high capacity of impurities in its structure, calcite is regarded as one of the most attractive minerals to trap heavy metals (HMs) and radionuclides via substitution during coprecipitation/crystal growth. As a high-reactivity mineral, calcite may release HMs via dissolution. However, the influence of the incorporated HMs and radionuclides in calcite on its dissolution is unclear. Herein, we reported the dissolution behavior of the synthesized calcite incorporated with cadmium (Cd), cobalt (Co), nickel (Ni), zinc (Zn), and uranium (U). Our findings indicated that the HMs and U in calcite could significantly change the dissolution process of calcite. The results demonstrated that the incorporated HMs and U had both inhibiting and enhancing effects on the solubility of calcite, depending on the type of metals and their content. Furthermore, secondary minerals such as smithsonite (ZnCO3), Co-poor aragonite, and U-rich calcite precipitated during dissolution. Thus, the incorporation of metals into calcite can control the behavior of HMs/uranium, calcite, and even carbon dioxide.
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Affiliation(s)
- Xiaohang Zhang
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
- University of Chinese Academy of Science, 19 Yuquan Road, Beijing, 100049, China
| | - Jianan Guo
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
- University of Chinese Academy of Science, 19 Yuquan Road, Beijing, 100049, China
| | - Shijun Wu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China.
| | - Fanrong Chen
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
| | - Yongqiang Yang
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 511 Kehua Street, Guangzhou, 510640, China
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106
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Evolved differences in energy metabolism and growth dictate the impacts of ocean acidification on abalone aquaculture. Proc Natl Acad Sci U S A 2020; 117:26513-26519. [PMID: 33020305 PMCID: PMC7584875 DOI: 10.1073/pnas.2006910117] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The pH of the global ocean is decreasing due to the absorption of anthropogenically emitted CO2, causing ocean acidification (OA). OA negatively impacts marine shellfish and threatens the continuing economic viability of molluscan shellfish aquaculture, a global industry valued at more than 19 billion USD. We identify traits linked to growth and lipid regulation that contribute tolerance to OA in abalone aquaculture, with broader implications for adaptation efforts in other shellfish species. We also identify evolved heritable variation for physiological resilience to OA that may be exploited in commercial and restoration aquaculture breeding programs to offset the negative consequences of continuing climate change. Ocean acidification (OA) poses a major threat to marine ecosystems and shellfish aquaculture. A promising mitigation strategy is the identification and breeding of shellfish varieties exhibiting resilience to acidification stress. We experimentally compared the effects of OA on two populations of red abalone (Haliotis rufescens), a marine mollusc important to fisheries and global aquaculture. Results from our experiments simulating captive aquaculture conditions demonstrated that abalone sourced from a strong upwelling region were tolerant of ongoing OA, whereas a captive-raised population sourced from a region of weaker upwelling exhibited significant mortality and vulnerability to OA. This difference was linked to population-specific variation in the maternal provisioning of lipids to offspring, with a positive correlation between lipid concentrations and survival under OA. This relationship also persisted in experiments on second-generation animals, and larval lipid consumption rates varied among paternal crosses, which is consistent with the presence of genetic variation for physiological traits relevant for OA survival. Across experimental trials, growth rates differed among family lineages, and the highest mortality under OA occurred in the fastest growing crosses. Identifying traits that convey resilience to OA is critical to the continued success of abalone and other shellfish production, and these mitigation efforts should be incorporated into breeding programs for commercial and restoration aquaculture.
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107
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Khan FU, Hu M, Kong H, Shang Y, Wang T, Wang X, Xu R, Lu W, Wang Y. Ocean acidification, hypoxia and warming impair digestive parameters of marine mussels. CHEMOSPHERE 2020; 256:127096. [PMID: 32447113 DOI: 10.1016/j.chemosphere.2020.127096] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/13/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
Global change and anthropogenic activities have driven marine environment changes dramatically during the past century, and hypoxia, acidification and warming have received much attention recently. Yet, the interactive effects among these stressors on marine organisms are extremely complex and not accurately clarified. Here, we evaluated the combined effects of low dissolved oxygen (DO), low pH and warming on the digestive enzyme activities of the mussel Mytilus coruscus. In this experiment, mussels were exposed to eight treatments, including two degrees of pH (8.1, 7.7), DO (6, 2 mg/l) and temperature (30 °C and 20 °C) for 30 days. Amylase (AMS), lipase (LPS), trypsin (TRY), trehalase (TREH) and lysozyme (LZM) activities were measured in the digestive glands of mussels. All the tested stress conditions showed significant effects on the enzymatic activities. AMS, LPS, TRY, TREH showed throughout decreased trend in their activities due to low pH, low DO, increased temperature and different combinations of these three stressors with time but LZM showed increased and then decreased trend in their activities. Hypoxia and warming showed almost similar effects on the enzymatic activities. PCA showed a positive correlation among all measured biochemical parameters. Therefore, the fitness of mussel is likely impaired by such marine environmental changes and their population may be affected under the global change scenarios.
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Affiliation(s)
- Fahim Ullah Khan
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China; Fisheries and Aquaculture Programme, Department of Zoology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Menghong Hu
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China
| | - Hui Kong
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China
| | - Yueyong Shang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China
| | - Ting Wang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China
| | - Xinghuo Wang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China
| | - Ran Xu
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China
| | - Weiqun Lu
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China.
| | - Youji Wang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai, 201306, China.
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108
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Effects of Temperature and pH on the Egg Production and Hatching Success of a Common Korean Copepod. DIVERSITY 2020. [DOI: 10.3390/d12100372] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The recent accelerated ocean acidification and global warming caused by increased atmospheric carbon dioxide may have an impact on the physiology and ecology of marine animals. This study was conducted to determine the egg production rate (EPR) and hatching success (EHS) of Acartia ohtsukai in response to the combined effects of an increase in temperature and a lower pH. Acartiaohtsukai with fresh surface seawater were collected in the northwestern Yeoja Bay of Korea in September 2017. The temperature and pH conditions applied included two different pH levels (representing the present: 7.9 and the future: 7.6) and three temperature values (26 °C, 28 °C, and 30 °C). In the pH 7.9, EPR significantly increased with increased temperature, but in pH 7.6, it significantly decreased as the temperature increased. EHS was lower in pH 7.6 than in pH 7.9. These results suggest that changes in the marine environment due to global warming and ocean acidification may affect Acartia populations and cause overall fluctuations in copepods of the genus Acartia.
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109
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Middelburg JJ, Soetaert K, Hagens M. Ocean Alkalinity, Buffering and Biogeochemical Processes. REVIEWS OF GEOPHYSICS (WASHINGTON, D.C. : 1985) 2020; 58:e2019RG000681. [PMID: 32879922 PMCID: PMC7391262 DOI: 10.1029/2019rg000681] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 04/23/2020] [Accepted: 04/23/2020] [Indexed: 05/31/2023]
Abstract
Alkalinity, the excess of proton acceptors over donors, plays a major role in ocean chemistry, in buffering and in calcium carbonate precipitation and dissolution. Understanding alkalinity dynamics is pivotal to quantify ocean carbon dioxide uptake during times of global change. Here we review ocean alkalinity and its role in ocean buffering as well as the biogeochemical processes governing alkalinity and pH in the ocean. We show that it is important to distinguish between measurable titration alkalinity and charge balance alkalinity that is used to quantify calcification and carbonate dissolution and needed to understand the impact of biogeochemical processes on components of the carbon dioxide system. A general treatment of ocean buffering and quantification via sensitivity factors is presented and used to link existing buffer and sensitivity factors. The impact of individual biogeochemical processes on ocean alkalinity and pH is discussed and quantified using these sensitivity factors. Processes governing ocean alkalinity on longer time scales such as carbonate compensation, (reversed) silicate weathering, and anaerobic mineralization are discussed and used to derive a close-to-balance ocean alkalinity budget for the modern ocean.
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Affiliation(s)
- Jack J. Middelburg
- Department of Earth Sciences, GeosciencesUtrecht UniversityUtrechtThe Netherlands
| | - Karline Soetaert
- Department of Estuarine and Delta SystemsRoyal Netherlands Institute for Sea Research (NIOZ Yerseke) and Utrecht UniversityYersekeThe Netherlands
| | - Mathilde Hagens
- Soil Chemistry and Chemical Soil QualityWageningen UniversityWageningenThe Netherlands
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110
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Efficacy of Enzymatically Induced Calcium Carbonate Precipitation in the Retention of Heavy Metal Ions. SUSTAINABILITY 2020. [DOI: 10.3390/su12177019] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study evaluated the efficacy of enzyme induced calcite precipitation (EICP) in restricting the mobility of heavy metals in soils. EICP is an environmentally friendly method that has wide ranging applications in the sustainable development of civil infrastructure. The study examined the desorption of three heavy metals from treated and untreated soils using ethylene diamine tetra-acetic acid (EDTA) and citric acid (C6H8O7) extractants under harsh conditions. Two natural soils spiked with cadmium (Cd), nickel (Ni), and lead (Pb) were studied in this research. The soils were treated with three types of enzyme solutions (ESs) to achieve EICP. A combination of urea of one molarity (M), 0.67 M calcium chloride, and urease enzyme (3 g/L) was mixed in deionized (DI) water to prepare enzyme solution 1 (ES1); non-fat milk powder (4 g/L) was added to ES1 to prepare enzyme solution 2 (ES2); and 0.37 M urea, 0.25 M calcium chloride, 0.85 g/L urease enzyme, and 4 g/L non-fat milk powder were mixed in DI water to prepare enzyme solution 3 (ES3). Ni, Cd, and Pb were added with load ratios of 50 and 100 mg/kg to both untreated and treated soils to study the effect of EICP on desorption rates of the heavy metals from soil. Desorption studies were performed after a curing period of 40 days. The curing period started after the soil samples were spiked with heavy metals. Soils treated with ESs were spiked with heavy metals after a curing period of 21 days and then further cured for 40 days. The amount of CaCO3 precipitated in the soil by the ESs was quantified using a gravimetric acid digestion test, which related the desorption of heavy metals to the amount of precipitated CaCO3. The order of desorption was as follows: Cd > Ni > Pb. It was observed that the average maximum removal efficiency of the untreated soil samples (irrespective of the load ratio and contaminants) was approximately 48% when extracted by EDTA and 46% when extracted by citric acid. The soil samples treated with ES2 exhibited average maximum removal efficiencies of 19% and 10% when extracted by EDTA and citric acid, respectively. It was observed that ES2 precipitated a maximum amount of calcium carbonate (CaCO3) when compared to ES1 and ES3 and retained the maximum amount of heavy metals in the soil by forming a CaCO3 shield on the heavy metals, thus decreasing their mobility. An approximate improvement of 30% in the retention of heavy metal ions was observed in soils treated with ESs when compared to untreated soil samples. Therefore, the study suggests that ESs can be an effective alternative in the remediation of soils contaminated with heavy metal ions.
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111
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Limatola N, Chun JT, Santella L. Effects of Salinity and pH of Seawater on the Reproduction of the Sea Urchin Paracentrotus lividus. THE BIOLOGICAL BULLETIN 2020; 239:13-23. [PMID: 32812816 DOI: 10.1086/710126] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
AbstractFertilization and early development are usually the most vulnerable stages in the life of marine animals, and the biological processes during this period are highly sensitive to the environment. In nature, sea urchin gametes are shed in seawater, where they undergo external fertilization and embryonic development. In a laboratory, it is possible to follow the exact morphological and biochemical changes taking place in the fertilized eggs and the developing embryos. Thus, observation of successful fertilization and the subsequent embryonic development of sea urchin eggs can be used as a convenient biosensor to assess the quality of the marine environment. In this paper, we have examined how salinity and pH changes affect the normal fertilization process and the following development of Paracentrotus lividus. The results of our studies using confocal microscopy, scanning and transmission electron microscopy, and time-lapse Ca2+ image recording indicated that both dilution and acidification of seawater have subtle but detrimental effects on many aspects of the fertilization process. They include Ca2+ signaling and coordinated actin cytoskeletal changes, leading to a significantly reduced rate of successful fertilization and, eventually, to abnormal or delayed embryonic development.
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112
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Surface Water CO 2 variability in the Gulf of Mexico (1996-2017). Sci Rep 2020; 10:12279. [PMID: 32704016 PMCID: PMC7378240 DOI: 10.1038/s41598-020-68924-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 06/21/2020] [Indexed: 11/08/2022] Open
Abstract
Approximately 380,000 underway measurements of sea surface salinity, temperature, and carbon dioxide (CO2) in the Gulf of Mexico (GoM) were compiled from the Surface Ocean CO2 Atlas (SOCAT) to provide a comprehensive observational analysis of spatiotemporal CO2 dynamics from 1996 to 2017. An empirical orthogonal function (EOF) was used to derive the main drivers of spatial and temporal variability in the dataset. In open and coastal waters, drivers were identified as a biological component linked to riverine water, and temperature seasonality. Air-sea flux estimates indicate the GoM open (- 0.06 ± 0.45 mol C m-2 year-1) and coastal (- 0.03 ± 1.83 mol C m-2 year-1) ocean are approximately neutral in terms of an annual source or sink for atmospheric CO2. Surface water pCO2 in the northwest and southeast GoM open ocean is increasing (1.63 ± 0.63 µatm year-1 and 1.70 ± 0.14 µatm year-1, respectively) at rates comparable to those measured at long-term ocean time-series stations. The average annual increase in coastal CO2 was 3.20 ± 1.47 µatm year-1 for the northwestern GoM and 2.35 ± 0.82 µatm year-1 for the west Florida Shelf. However, surface CO2 in the central (coastal and open) GoM, which is influenced by Mississippi and Atchafalaya River outflow, remained fairly stable over this time period.
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Ocean Acidification and Human Health. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17124563. [PMID: 32599924 PMCID: PMC7344635 DOI: 10.3390/ijerph17124563] [Citation(s) in RCA: 169] [Impact Index Per Article: 42.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/19/2020] [Accepted: 06/20/2020] [Indexed: 12/12/2022]
Abstract
The ocean provides resources key to human health and well-being, including food, oxygen, livelihoods, blue spaces, and medicines. The global threat to these resources posed by accelerating ocean acidification is becoming increasingly evident as the world's oceans absorb carbon dioxide emissions. While ocean acidification was initially perceived as a threat only to the marine realm, here we argue that it is also an emerging human health issue. Specifically, we explore how ocean acidification affects the quantity and quality of resources key to human health and well-being in the context of: (1) malnutrition and poisoning, (2) respiratory issues, (3) mental health impacts, and (4) development of medical resources. We explore mitigation and adaptation management strategies that can be implemented to strengthen the capacity of acidifying oceans to continue providing human health benefits. Importantly, we emphasize that the cost of such actions will be dependent upon the socioeconomic context; specifically, costs will likely be greater for socioeconomically disadvantaged populations, exacerbating the current inequitable distribution of environmental and human health challenges. Given the scale of ocean acidification impacts on human health and well-being, recognizing and researching these complexities may allow the adaptation of management such that not only are the harms to human health reduced but the benefits enhanced.
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114
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How Does the Sexual Reproduction of Marine Life Respond to Ocean Acidification? DIVERSITY 2020. [DOI: 10.3390/d12060241] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Recent research indicates that synchronicity of sexual reproduction in coral spawning events is breaking down, leading to aging populations and decreased recruitment success. In this perspective, we develop a hypothesis that this phenomenon could be caused by ongoing ocean acidification (OA). We hypothesize, that the underlying physiological machinery could be the carbon concentrating mechanism (CCM). The endosymbiotic zooxanthellae of corals could use this mechanism to sense calm water motion states in a comparable way to that known from macroalgae. In macroalgae, it is well-established that dissolved inorganic carbon (DIC) acts as the trigger for signaling low water motion. Hence, evolutionarily developed signals of low water motion, suited for gamete-release, may be misleading in the future, potentially favoring opportunistic species in a broad range of marine organisms.
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Nishida K, Chew YC, Miyairi Y, Hirabayashi S, Suzuki A, Hayashi M, Yamamoto Y, Sato M, Nojiri Y, Yokoyama Y. Novel reverse radioisotope labelling experiment reveals carbon assimilation of marine calcifiers under ocean acidification conditions. Methods Ecol Evol 2020. [DOI: 10.1111/2041-210x.13396] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kozue Nishida
- Department of Chemistry and Material Engineering National Institute of TechnologyIbaraki College Hitachinaka Japan
- Japan Society for the Promotion of Science (JSPS) Tokyo Japan
- Faculty of Life and Environmental Sciences University of Tsukuba Tsukuba Japan
| | - Yue Chin Chew
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
- Graduate Program on Environmental Sciences The University of Tokyo Tokyo Japan
| | - Yosuke Miyairi
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
| | - Shoko Hirabayashi
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
- Department of Earth and Planetary Science Graduate School of Science The University of Tokyo Tokyo Japan
| | - Atsushi Suzuki
- Geological Survey of Japan National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Japan
| | - Masahiro Hayashi
- The Demonstration Laboratory Marine Ecology Research Institute Kashiwazaki Japan
| | - Yuzo Yamamoto
- The Demonstration Laboratory Marine Ecology Research Institute Kashiwazaki Japan
| | - Mizuho Sato
- Geological Survey of Japan National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Japan
- Asahi Geo‐Survey Co. Ltd Tokyo Japan
| | - Yukihiro Nojiri
- Department of Earth and Environmental Sciences Hirosaki University Hirosaki Japan
- Center for Global Environmental Research National Institute for Environmental Studies Tsukuba Japan
| | - Yusuke Yokoyama
- Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
- Graduate Program on Environmental Sciences The University of Tokyo Tokyo Japan
- Department of Earth and Planetary Science Graduate School of Science The University of Tokyo Tokyo Japan
- Biogeochemistry Program Japan Agency for Marine‐Earth Science and Technology Yokosuka Japan
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Evaluation of the Environmental Benefits Associated with the Addition of Olive Pomace in the Manufacture of Lightweight Aggregates. MATERIALS 2020; 13:ma13102351. [PMID: 32443754 PMCID: PMC7288042 DOI: 10.3390/ma13102351] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/15/2020] [Accepted: 05/18/2020] [Indexed: 11/16/2022]
Abstract
A Life Cycle Assessment (LCA) using SimaPro software has been carried out concerning the manufacture of artificial lightweight aggregates (LWAs). The study aims to evaluate the changes in the environmental impact when an additive of residual origin, specifically olive pomace (OP), is added following the principles of the Circular Economy. This residue (commonly known as alperujo) was used as a substitute for clay in 1.25, 2.5 and 5 wt%. The environmental impact related to the use of olive pomace in the mixture was estimated using the CML 2000 methodology, yielding improvements of 3.8%, 7.7% and 15.3% for 1.25, 2.5 and 5 wt% OP added, respectively. Optimum addition results are in the range of 1.25 and 2.5 wt% OP. In this way, the reduction of emissions associated with LWA manufacture would be favored without negatively affecting the technological properties of the resulting material.
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117
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Lee YH, Jeong CB, Wang M, Hagiwara A, Lee JS. Transgenerational acclimation to changes in ocean acidification in marine invertebrates. MARINE POLLUTION BULLETIN 2020; 153:111006. [PMID: 32275552 DOI: 10.1016/j.marpolbul.2020.111006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 06/11/2023]
Abstract
The rapid pace of increasing oceanic acidity poses a major threat to the fitness of the marine ecosystem, as well as the buffering capacity of the oceans. Disruption in chemical equilibrium in the ocean leads to decreased carbonate ion precipitation, resulting in calcium carbonate saturation. If these trends continue, calcifying invertebrates will experience difficultly maintaining their calcium carbonate exoskeleton and shells. Because malfunction of exoskeleton formation by calcifiers in response to ocean acidification (OA) will have non-canonical biological cascading results in the marine ecosystem, many studies have investigated the direct and indirect consequences of OA on ecosystem- and physiology-related traits of marine invertebrates. Considering that evolutionary adaptation to OA depends on the duration of OA effects, long-term exposure to OA stress over multi-generations may result in adaptive mechanisms that increase the potential fitness of marine invertebrates in response to OA. Transgenerational studies have the potential to elucidate the roles of acclimation, carryover effects, and evolutionary adaptation within and over generations in response to OA. In particular, understanding mechanisms of transgenerational responses (e.g., antioxidant responses, metabolic changes, epigenetic reprogramming) to changes in OA will enhance our understanding of marine invertebrate in response to rapid climate change.
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Affiliation(s)
- Young Hwan Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Chang-Bum Jeong
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea; Department of Marine Science, College of Nature Science, Incheon National University, Incheon 22012, South Korea
| | - Minghua Wang
- State Key Laboratory of Marine Environmental Science/College of the Environment & Ecology, Xiamen University, Xiamen 36110, China; Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen 361102, China
| | - Atsushi Hagiwara
- Institute of Integrated Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan; Organization for Marine Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan
| | - Jae-Seong Lee
- Department of Biological Science, College of Science, Sungkyunkwan University, Suwon 16419, South Korea.
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Coccolith mass and morphology of different Emiliania huxleyi morphotypes: A critical examination using Canary Islands material. PLoS One 2020; 15:e0230569. [PMID: 32218602 PMCID: PMC7101162 DOI: 10.1371/journal.pone.0230569] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 03/03/2020] [Indexed: 11/19/2022] Open
Abstract
Different morphotypes of the abundant marine calcifying algal species Emiliania huxleyi are commonly linked to various degrees of E. huxleyi calcification, but few studies have been done to validate this assumption. This study investigated therefore whether E. huxleyi morphotypes can be related to coccolithophore calcification and coccolith mass. Samples from January (high productivity) and September (low productivity) 1997 at an open ocean and a coastal site near the Canary Islands were analysed using a combination of thickness measurements (Circular Polarizer Retardation estimates (CPR) method), Scanning Electron Microscope imaging, and Markov Chain Monte Carlo (MCMC) models. Mean E. huxleyi coccolith mass varied from a maximum of 2.9pg at the open ocean station in January to a minimum of 1.7pg in September at both stations. In contrast, overall calcite produced by E. huxleyi (assuming 23 coccoliths/cell) varied from a maximum of 2.6 μgL-1 at the coastal station in January to a minimum of 0.5 μgL-1 in September at the open ocean site. The relative abundance of “Overcalcified” Type A, Type A, Group B and malformed coccoliths was determined from SEM images. The mean coccolith mass of “Overcalcified” Type A was 2.0pg using the CPR-method, while mean mass of Type A and Group B coccoliths was determined using coccolith length measurements from SEM images and MCMC models relating thickness measurements to morphotype relative abundance. Type A cocccolith mass varied from a 1.6pg to 2.6pg and Group B coccolith mass varied from 1.5pg to 2.0pg. These results demonstrate that the coccolith mass of Type A, “Overcalcified” Type A, and Group B do not differ systematically and there is no systematic relationship between relative abundance of a morphotype and the overall calcite production of E. huxleyi. Therefore, morphotype appearance and relative abundance can not be uniformly used as reliable indicators of E. huxleyi calcification or calcite production.
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Ye H, Morozov E, Tang D, Wang S, Liu Y, Li Y, Tang S. Variation of pCO2 concentrations induced by tropical cyclones "Wind-Pump" in the middle-latitude surface oceans: A comparative study. PLoS One 2020; 15:e0226189. [PMID: 32208420 PMCID: PMC7092959 DOI: 10.1371/journal.pone.0226189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Accepted: 11/16/2019] [Indexed: 11/18/2022] Open
Abstract
The Bermuda Testbed Mooring (BTM) and Bay of Bengal Ocean Acidification (BOBOA) mooring measurements were used to identify changes in the partial pressure of CO2 at the sea surface (pCO2sea) and air-sea CO2 fluxes (FCO2) associated with passage of two tropical cyclones (TCs), Florence and Hudhud. TC Florence passed about 165 km off the BTM mooring site with strong wind speeds of 24.8 m s–1 and translation speed of 7.23 m s–1. TC Hudhud passed about 178 km off the BOBOA mooring site with wind speeds of 14.0 m s–1 and translation speed of 2.58 m s–1. The present study examined the effect of temperature, salinity, dissolved inorganic carbon (DIC), total alkalinity (TA), air-sea CO2 flux, and phytoplankton chlorophyll a change on pCO2sea as a response to TCs. Enhanced mixed layer depths were observed due to TCs-induced vertical mixing at both mooring sites. Decreased pCO2sea (–15.16±5.60 μatm) at the BTM mooring site and enhanced pCO2sea (14.81±7.03 μatm) at the BOBOA mooring site were observed after the passage of Florence and Hudhud, respectively. Both DIC and TA are strongly correlated with salinity in the upper layer of the isothermal layer depth (ILD). Strong (weak) vertical gradient in salinity is accompanied by strong (weak) vertical gradients in DIC and TA. Strong vertical salinity gradient in the upper layer of the ILD (0.031 psu m–1), that supply much salinity, dissolved inorganic carbon and total alkalinity from the thermocline was the cause of the increased pCO2sea in the BOBOA mooring water. Weak vertical salinity gradient in the upper layer of the ILD (0.003 psu m–1) was responsible for decreasing pCO2sea in the BTM mooring water. The results of this study showed that the vertical salinity gradient in the upper layer of the ILD is a good indicator of the pCO2sea variation after the passages of TCs.
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Affiliation(s)
- Haijun Ye
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Evgeny Morozov
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Marine Hydrophysical Institute, Russian Academy of Sciences, Sevastopol, Russia
| | - Danling Tang
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- * E-mail:
| | - Sufeng Wang
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Yupeng Liu
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Ying Li
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Shilin Tang
- State Key Laboratory of Tropical Oceanography, Guangdong Key Laboratory of Ocean Remote Sensing, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
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120
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Sharma D, Biswas H, Silori S, Bandyopadhyay D, Shaik AU, Cardinal D, Mandeng-Yogo M, Ray D. Impacts of Zn and Cu enrichment under ocean acidification scenario on a phytoplankton community from tropical upwelling system. MARINE ENVIRONMENTAL RESEARCH 2020; 155:104880. [PMID: 32072984 DOI: 10.1016/j.marenvres.2020.104880] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 01/13/2020] [Accepted: 01/19/2020] [Indexed: 06/10/2023]
Abstract
Increasing dissolution of CO2 in the surface ocean is rapidly decreasing its pH and changing carbon chemistry which is further affecting marine biota in several ways. Phytoplankton response studies under the combination of elevated CO2 and trace metals are rare. We have conducted two consecutive onboard incubation experiments (R. V. Sindhu Sadhana; August 2017) in the eastern Arabian Sea (SW coast of India) during an upwelling event. A nutrient enriched diatom bloom was initiated onboard and grown under ambient (≈400 μatm, A-CO2) and high CO2 levels (≈1000 μatm; H-CO2) with different zinc (Zn; 1 nM) and copper (Cu) concentrations (1 nM, 2 nM and 8 nM). Phytoplankton community composition and the dominant genera were different during these two experiments. CO2 enrichment alone did not show any significant growth stimulating impact on the experimental community except enhanced cell density in the first experiment. Addition of Zn at A-CO2 level revealed no noticeable responses; whereas, the same treatment under H-CO2 level significantly reduced cell number. Considerably high protein content under H-CO2+Zn treatment was possibly counteracting Zn toxicity which also caused slower growth rate. Cu addition did not show any noticeable impact on growth and biomass production except increased protein content as well as decreased carbohydrate: protein ratio. This can be attributed to relatively higher protein synthesis than carbohydrate to alleviate oxidative stress generated by Cu. The centric diatom Chaetoceros and toxin producing pennate diatom Pseudo-nitzschia showed no significant response to either CO2 or Zn enrichment. Large centric diatom Leptocylindrus and Skeletonema responded positively to Zn addition in both CO2 levels. The former species showed the most sensitive response at the highest Cu and H-CO2 treatment; whereas, the pennate diatoms Nitzschia and Pseudo-nitzschia (toxigenic diatom) showed higher resilience under elevated CO2 and Cu levels. This observation indicated that in future ocean, increasing CO2 concentrations and trace metal pollution may potentially alter phytoplankton community structure and may facilitate toxigenic diatom bloom in the coastal waters.
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Affiliation(s)
- Diksha Sharma
- CSIR National Institute of Oceanography, Biological Oceanography Division, Dona Paula, Goa, 403 004, India
| | - Haimanti Biswas
- CSIR National Institute of Oceanography, Biological Oceanography Division, Dona Paula, Goa, 403 004, India.
| | - Saumya Silori
- CSIR National Institute of Oceanography, Biological Oceanography Division, Dona Paula, Goa, 403 004, India
| | - D Bandyopadhyay
- CSIR National Institute of Oceanography, Biological Oceanography Division, Dona Paula, Goa, 403 004, India
| | - Aziz urRahman Shaik
- CSIR National Institute of Oceanography, Biological Oceanography Division, Dona Paula, Goa, 403 004, India
| | - Damien Cardinal
- Laboratoire d'Océanographieet du Climat:Expérimentations et ApprochesNumériques (LOCEAN UMR7159, SU, IRD, CNRS, MNHN), Sorbonne Université, 4 Place Jussieu, 75005, Paris, France
| | - Magloire Mandeng-Yogo
- LOCEAN (UMR7159, SU, IRD, CNRS, MNHN) -Institut de recherche pour le développement (IRD), 32 Avenue Henri Varagnat, 93140, Bondy, France
| | - Durbar Ray
- CSIR National Institute of Oceanography, Biological Oceanography Division, Dona Paula, Goa, 403 004, India
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121
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Ohta T, Saeki I. Comparisons of calcium sources between arboreal and ground‐dwelling land snails: implication from strontium isotope analyses. J Zool (1987) 2020. [DOI: 10.1111/jzo.12767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Ohta
- The Research Institute for Humanity and Nature Kyoto Japan
- Environmental Biology and Chemistry Graduate School of Science and Engineering University of Toyama Toyama Japan
| | - I. Saeki
- Faculty of Life and Environmental Sciences University of Tsukuba Tsukuba Japan
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122
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Strader ME, Wong JM, Hofmann GE. Ocean acidification promotes broad transcriptomic responses in marine metazoans: a literature survey. Front Zool 2020; 17:7. [PMID: 32095155 PMCID: PMC7027112 DOI: 10.1186/s12983-020-0350-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 01/06/2020] [Indexed: 01/16/2023] Open
Abstract
For nearly a decade, the metazoan-focused research community has explored the impacts of ocean acidification (OA) on marine animals, noting that changes in ocean chemistry can impact calcification, metabolism, acid-base regulation, stress response and behavior in organisms that hold high ecological and economic value. Because OA interacts with several key physiological processes in marine organisms, transcriptomics has become a widely-used method to characterize whole organism responses on a molecular level as well as inform mechanisms that explain changes in phenotypes observed in response to OA. In the past decade, there has been a notable rise in studies that examine transcriptomic responses to OA in marine metazoans, and here we attempt to summarize key findings across these studies. We find that organisms vary dramatically in their transcriptomic responses to pH although common patterns are often observed, including shifts in acid-base ion regulation, metabolic processes, calcification and stress response mechanisms. We also see a rise in transcriptomic studies examining organismal response to OA in a multi-stressor context, often reporting synergistic effects of OA and temperature. In addition, there is an increase in studies that use transcriptomics to examine the evolutionary potential of organisms to adapt to OA conditions in the future through population and transgenerational experiments. Overall, the literature reveals complex organismal responses to OA, in which some organisms will face more dramatic consequences than others. This will have wide-reaching impacts on ocean communities and ecosystems as a whole.
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Affiliation(s)
- Marie E Strader
- 1Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA 93106 USA.,2Department of Biological Sciences, Auburn University, Auburn, AL 36849 USA
| | - Juliet M Wong
- 1Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA 93106 USA.,3Present address: Department of Biological Sciences, Florida International University, North Miami, FL 33181 USA
| | - Gretchen E Hofmann
- 1Department of Ecology, Evolution and Marine Biology, University of California Santa Barbara, Santa Barbara, CA 93106 USA
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123
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Weinnig AM, Gómez CE, Hallaj A, Cordes EE. Cold-water coral (Lophelia pertusa) response to multiple stressors: High temperature affects recovery from short-term pollution exposure. Sci Rep 2020; 10:1768. [PMID: 32019964 PMCID: PMC7000676 DOI: 10.1038/s41598-020-58556-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 01/16/2020] [Indexed: 11/15/2022] Open
Abstract
There are numerous studies highlighting the impacts of direct and indirect stressors on marine organisms, and multi-stressor studies of their combined effects are an increasing focus of experimental work. Lophelia pertusa is a framework-forming cold-water coral that supports numerous ecosystem services in the deep ocean. These corals are threatened by increasing anthropogenic impacts to the deep-sea, such as global ocean change and hydrocarbon extraction. This study implemented two sets of experiments to assess the effects of future conditions (temperature: 8 °C and 12 °C, pH: 7.9 and 7.6) and hydrocarbon exposure (oil, dispersant, oil + dispersant combined) on coral health. Phenotypic response was assessed through three independent observations of diagnostic characteristics that were combined into an average health rating at four points during exposure and recovery. In both experiments, regardless of environmental condition, average health significantly declined during 24-hour exposure to dispersant alone but was not significantly altered in the other treatments. In the early recovery stage (24 hours), polyp health returned to the pre-exposure health state under ambient temperature in all treatments. However, increased temperature resulted in a delay in recovery (72 hours) from dispersant exposure. These experiments provide evidence that global ocean change can affect the resilience of corals to environmental stressors and that exposure to chemical dispersants may pose a greater threat than oil itself.
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Affiliation(s)
- Alexis M Weinnig
- Department of Biology, Temple University, Philadelphia, Pennsylvania, USA.
| | - Carlos E Gómez
- Department of Biology, Temple University, Philadelphia, Pennsylvania, USA
- Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, D.C., Colombia
| | - Adam Hallaj
- Department of Biology, Temple University, Philadelphia, Pennsylvania, USA
| | - Erik E Cordes
- Department of Biology, Temple University, Philadelphia, Pennsylvania, USA
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124
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Di Santo V. Ocean acidification and warming affect skeletal mineralization in a marine fish. Proc Biol Sci 2020; 286:20182187. [PMID: 30963862 DOI: 10.1098/rspb.2018.2187] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Ocean acidification and warming are known to alter, and in many cases decrease, calcification rates of shell and reef building marine invertebrates. However, to date, there are no datasets on the combined effect of ocean pH and temperature on skeletal mineralization of marine vertebrates, such as fishes. Here, the embryos of an oviparous marine fish, the little skate ( Leucoraja erinacea), were developmentally acclimatized to current and increased temperature and CO2 conditions as expected by the year 2100 (15 and 20°C, approx. 400 and 1100 µatm, respectively), in a fully crossed experimental design. Using micro-computed tomography, hydroxyapatite density was estimated in the mineralized portion of the cartilage in jaws, crura, vertebrae, denticles and pectoral fins of juvenile skates. Mineralization increased as a consequence of high CO2 in the cartilage of crura and jaws, while temperature decreased mineralization in the pectoral fins. Mineralization affects stiffness and strength of skeletal elements linearly, with implications for feeding and locomotion performance and efficiency. This study is, to my knowledge, the first to quantify a significant change in mineralization in the skeleton of a fish and shows that changes in temperature and pH of the oceans have complex effects on fish skeletal morphology.
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Affiliation(s)
- Valentina Di Santo
- Museum of Comparative Zoology, Harvard University , 26 Oxford Street, Cambridge, MA , USA
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125
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Wang F, Zhu J, Chen L, Zuo Y, Hu X, Yang Y. Autonomous and In Situ Ocean Environmental Monitoring on Optofluidic Platform. MICROMACHINES 2020; 11:E69. [PMID: 31936398 PMCID: PMC7019421 DOI: 10.3390/mi11010069] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/02/2020] [Accepted: 01/07/2020] [Indexed: 11/17/2022]
Abstract
Determining the distributions and variations of chemical elements in oceans has significant meanings for understanding the biogeochemical cycles, evaluating seawater pollution, and forecasting the occurrence of marine disasters. The primary chemical parameters of ocean monitoring include nutrients, pH, dissolved oxygen (DO), and heavy metals. At present, ocean monitoring mainly relies on laboratory analysis, which is hindered in applications due to its large size, high power consumption, and low representative and time-sensitive detection results. By integrating photonics and microfluidics into one chip, optofluidics brings new opportunities to develop portable microsystems for ocean monitoring. Optofluidic platforms have advantages in respect of size, cost, timeliness, and parallel processing of samples compared with traditional instruments. This review describes the applications of optofluidic platforms on autonomous and in situ ocean environmental monitoring, with an emphasis on their principles, sensing properties, advantages, and disadvantages. Predictably, autonomous and in situ systems based on optofluidic platforms will have important applications in ocean environmental monitoring.
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Affiliation(s)
- Fang Wang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (F.W.); (J.Z.); (L.C.); (Y.Z.); (X.H.)
- Shenzhen Research Institute, Wuhan University, Shenzhen 518000, China
| | - Jiaomeng Zhu
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (F.W.); (J.Z.); (L.C.); (Y.Z.); (X.H.)
- Shenzhen Research Institute, Wuhan University, Shenzhen 518000, China
| | - Longfei Chen
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (F.W.); (J.Z.); (L.C.); (Y.Z.); (X.H.)
- Shenzhen Research Institute, Wuhan University, Shenzhen 518000, China
| | - Yunfeng Zuo
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (F.W.); (J.Z.); (L.C.); (Y.Z.); (X.H.)
- Shenzhen Research Institute, Wuhan University, Shenzhen 518000, China
| | - Xuejia Hu
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (F.W.); (J.Z.); (L.C.); (Y.Z.); (X.H.)
- Shenzhen Research Institute, Wuhan University, Shenzhen 518000, China
| | - Yi Yang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China; (F.W.); (J.Z.); (L.C.); (Y.Z.); (X.H.)
- Shenzhen Research Institute, Wuhan University, Shenzhen 518000, China
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126
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Soon TK, Zheng H. Climate Change and Bivalve Mass Mortality in Temperate Regions. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 251:109-129. [PMID: 31289937 DOI: 10.1007/398_2019_31] [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] [Indexed: 06/09/2023]
Abstract
One of the fastest-growing global food sectors is the bivalve aquaculture industry. Bivalves particularly oysters, mussels and clams are important sources of animal protein (Tan and Ransangan 2016a, b). Bivalve aquaculture represents 14-16% of the average per capita animal protein for 1.5 billion people and supports over 200,000 livelihoods, mostly in developing countries (FAO 2018). Most of the bivalves produced around the world (89%) are from aquaculture (FAO 2016). To date, mollusc aquaculture have accounted for 21.42% (17.14 million tonnes) of the total aquaculture production, with Asia being the largest contributor (92.27%) (FAO 2018).
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Affiliation(s)
- Tan Kar Soon
- Key Laboratory of Marine Biotechnology of Guangdong Province, Shantou University, Shantou, China
| | - Huaiping Zheng
- Key Laboratory of Marine Biotechnology of Guangdong Province, Shantou University, Shantou, China.
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127
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Baag S, Mahapatra S, Mandal S. Unravelling the effects of elevated temperature on the physiological energetics of Bellamya bengalensis. J Therm Biol 2019; 88:102494. [PMID: 32125982 DOI: 10.1016/j.jtherbio.2019.102494] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 12/02/2019] [Accepted: 12/23/2019] [Indexed: 01/12/2023]
Abstract
Temperature is one of the key environmental factors affecting the eco-physiological responses of living organisms and is considered one of the utmost crucial factors in shaping the fundamental niche of a species. The purpose of the present study is to delineate the physiological response and changes in energy allocation strategy of Bellamya bengalensis, a freshwater gastropod in the anticipated summer elevated temperature in the future by measuring the growth, body conditions (change in total weight, change in organ to flesh weight ratio), physiological energetics (ingestion rate, absorption rate, respiration rate, excretion rate and Scope for Growth) and thermal performance, Arrhenius breakpoint temperature (ABT), thermal critical maxima (CTmax), warming tolerance (WT) as well as thermal safety margin (TSM) through a mesocosm experiment. We exposed the animals to three different temperatures, 25 °C (average habitat temperature for this animal) and elevated temperatures 30 °C, 35 °C for 30 days and changes in energy budget were measured twice (on 15th and 30th day). Significant changes were observed in body conditions as well as physiological energetics. The total body weight as well as the organ/flesh weight ratio, ingestion followed by absorption rate decreased whereas, respiration and excretion rate increased with elevated temperature treatments resulting in a negative Scope for Growth in adverse conditions. Though no profound impact was found on ABT/CTmax, the peak of thermal curve was considerably declined for animals that were reared in higher temperature treatments. Our data reflects that thermal stress greatly impact the physiological functioning and growth patterns of B. bengalensis which might jeopardize the freshwater ecosystem functioning in future climate change scenario.
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Affiliation(s)
- Sritama Baag
- Marine Ecology Laboratory, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata, 700 073, India
| | - Sayantan Mahapatra
- Marine Ecology Laboratory, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata, 700 073, India
| | - Sumit Mandal
- Marine Ecology Laboratory, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata, 700 073, India.
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128
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Surface ocean pH and buffer capacity: past, present and future. Sci Rep 2019; 9:18624. [PMID: 31819102 PMCID: PMC6901524 DOI: 10.1038/s41598-019-55039-4] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 11/20/2019] [Indexed: 12/05/2022] Open
Abstract
The ocean’s chemistry is changing due to the uptake of anthropogenic carbon dioxide (CO2). This phenomenon, commonly referred to as “Ocean Acidification”, is endangering coral reefs and the broader marine ecosystems. In this study, we combine a recent observational seawater CO2 data product, i.e., the 6th version of the Surface Ocean CO2 Atlas (1991–2018, ~23 million observations), with temporal trends at individual locations of the global ocean from a robust Earth System Model to provide a high-resolution regionally varying view of global surface ocean pH and the Revelle Factor. The climatology extends from the pre-Industrial era (1750 C.E.) to the end of this century under historical atmospheric CO2 concentrations (pre-2005) and the Representative Concentrations Pathways (post-2005) of the Intergovernmental Panel on Climate Change (IPCC)’s 5th Assessment Report. By linking the modeled pH trends to the observed modern pH distribution, the climatology benefits from recent improvements in both model design and observational data coverage, and is likely to provide improved regional OA trajectories than the model output could alone, therefore, will help guide the regional OA adaptation strategies. We show that air-sea CO2 disequilibrium is the dominant mode of spatial variability for surface pH, and discuss why pH and calcium carbonate mineral saturation states, two important metrics for OA, show contrasting spatial variability.
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129
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Simulated CO 2-induced ocean acidification for ocean in the East China: historical conditions since preindustrial time and future scenarios. Sci Rep 2019; 9:18559. [PMID: 31811165 PMCID: PMC6897940 DOI: 10.1038/s41598-019-54861-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/20/2019] [Indexed: 11/17/2022] Open
Abstract
Since preindustrial times, as atmospheric CO2 concentration increases, the ocean continuously absorbs anthropogenic CO2, reducing seawater pH and \documentclass[12pt]{minimal}
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\begin{document}$$[{{\rm{C}}{\rm{O}}}_{3}^{2-}]$$\end{document}[CO32−], which is termed ocean acidification. We perform Earth system model simulations to assess CO2-induced acidification for ocean in the East China, one of the most vulnerable areas to ocean acidification. By year 2017, ocean surface pH in the East China drops from the preindustrial level of 8.20 to 8.06, corresponding to a 35% rise in [H+], and reduction rate of pH becomes faster in the last two decades. Changes in surface seawater acidity largely result from CO2-induced changes in surface dissolved inorganic carbon (DIC), alkalinity (ALK), salinity and temperature, among which DIC plays the most important role. By year 2300, simulated reduction in sea surface \documentclass[12pt]{minimal}
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\begin{document}$$[{{\rm{C}}{\rm{O}}}_{3}^{2-}]$$\end{document}[CO32−] is 13% under RCP2.6, contrasted to 72% under RCP8.5. Furthermore, simulated results show that CO2-induced warming acts to mitigate reductions in \documentclass[12pt]{minimal}
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\begin{document}$$[{{\rm{C}}{\rm{O}}}_{3}^{2-}]$$\end{document}[CO32−], but the individual effect of oceanic CO2 uptake is much greater than the effect of CO2-induced warming on ocean acidification. Our study quantifies ocean acidification induced by anthropogenic CO2, and indicates the potentially important role of accelerated CO2 emissions in projections of future changes in biogeochemistry and ecosystem of ocean in the East China.
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130
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Kong H, Wu F, Jiang X, Wang T, Hu M, Chen J, Huang W, Bao Y, Wang Y. Nano-TiO 2 impairs digestive enzyme activities of marine mussels under ocean acidification. CHEMOSPHERE 2019; 237:124561. [PMID: 31549663 DOI: 10.1016/j.chemosphere.2019.124561] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/20/2019] [Accepted: 08/09/2019] [Indexed: 06/10/2023]
Abstract
With the development of nanotechnology and increased nanomaterial application, TiO2 nanoparticles have been released into the aquatic environment, causing potential ecotoxicological effects on aquatic organisms. Ocean acidification caused by anthropogenic CO2 is one of the most common environmental stressors, occurring simultaneously with marine contaminants, e.g., nanoparticles. Marine bivalves can accumulate nanoparticles and their digestive functions may be affected. In this study, we investigated the potential influences of TiO2 nanoparticles on the digestive enzyme activities of marine mussels Mytilus coruscus under ocean acidification. Mussels were exposed to combined treatments with three concentrations of nano-TiO2 (0, 2.5, 10 mg/L) and two pH values (8.1, 7.3) for 14 days, and then recovered under ambient condition (pH 8.1 and no nanoparticle) for 7 days. Samples were taken on the 1st, 3rd, 7th, 14th, and 21st day, the digestive enzymes, including amylase, pepsin, trypsin, lipase, and lysozyme, were investigated. Our results showed that nano-TiO2 and low pH had negative effects on amylase, pepsin, trypsin, and lipase, while both of them led an increase in lysozyme activity. Nano-TiO2 showed greater effects on the digestive capacity of M. coruscus rather than low pH. Moreover, a recovery period of 7 days was not sufficient for these enzymes to fully recover.
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Affiliation(s)
- Hui Kong
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Fangli Wu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Xiaoyu Jiang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Ting Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Menghong Hu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Jianfang Chen
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
| | - Wei Huang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
| | - Yongbo Bao
- Zhejiang Key Laboratory of Aquatic Germplasm Resources, College of Biological & Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China
| | - Youji Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, China; Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China.
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131
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Ma J, Shu H, Yang B, Byrne RH, Yuan D. Spectrophotometric determination of pH and carbonate ion concentrations in seawater: Choices, constraints and consequences. Anal Chim Acta 2019; 1081:18-31. [PMID: 31446956 DOI: 10.1016/j.aca.2019.06.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 06/10/2019] [Accepted: 06/10/2019] [Indexed: 01/27/2023]
Abstract
Accurate and precise marine CO2 system measurements are important for marine carbon cycle research and investigations of ocean acidification. Seawater pH is important because it can be used to characterize a wide range of chemical and biogeochemical processes. Saturation states of calcium carbonate minerals, which are directly proportional to carbonate ion concentration ([CO32-]), influence biogenic calcification and rates of carbonate dissolution. Spectrophotometric pH and carbonate ion measurements can both benefit greatly from the high sensitivity, stability, consistency and processing speed made possible through automation. Spectrophotometric methods are well-suited for shipboard, underway and in situ deployments under harsh conditions. Spectrophotometric pH measurements typically have a reproducibility of 0.0004-0.001 for shipboard and laboratory measurements and 0.0014-0.004 for in situ measurements. Shipboard spectrophotometric measurements of [CO32-] are becoming common on research expeditions. This review highlights the development of methods and instrumentation for spectrophotometric pH and [CO32-] measurements, and discusses the pros and cons of current technology. A comprehensive summary of the analytical merits of different flow analysis instruments is given. Aspects of measurement protocols that bear on the quality of pH and [CO32-] measurements, such as indicator purification, sample pretreatment, etc., are also described. Based on three decades of experience with seawater analysis, this review includes method recommendations and perspectives directly applicable or potentially applicable to pH and [CO32-] analysis of seawater.
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Affiliation(s)
- Jian Ma
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361102, China.
| | - Huilin Shu
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361102, China
| | - Bo Yang
- Department of Environmental Sciences, University of Virginia, VA 22904, United States
| | - Robert H Byrne
- College of Marine Science, University of South Florida, 140 7th Avenue South, St. Petersburg, FL 33701, United States
| | - Dongxing Yuan
- State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361102, China
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132
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A combination process of mineral carbonation with SO2 disposal for simulated flue gas by magnesia-added seawater. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1871-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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133
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Zhao L, Liu B, An W, Deng Y, Lu Y, Liu B, Wang L, Cong Y, Sun X. Assessing the impact of elevated pCO 2 within and across generations in a highly invasive fouling mussel (Musculista senhousia). THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 689:322-331. [PMID: 31277000 DOI: 10.1016/j.scitotenv.2019.06.466] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/26/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
Marine biofouling by the swiftly spreading invasive mussel (Musculista senhousia) has caused serious ecological and economic consequences in the global coastal waters. However, the fate of this highly invasive fouling species in a rapidly acidifying ocean remains unknown. Here, we demonstrated the impacts of ocean acidification within and across generations, to understand whether M. senhousia has the capacity to acclimate to changing ocean conditions. During the gonadal development, exposure of mussels to elevated pCO2 caused significant decreases of survival, growth performance and condition index, and shifted the whole-organism energy budget by inflating energy expenses to fuel compensatory processes, eventually impairing the success of spawning. Yet, rapid transgenerational acclimation occurred during the early life history stage and persisted into adulthood. Eggs spawned from CO2-exposed mussels were significantly bigger compared with those from non-CO2-exposed mussels, indicating increased maternal provisioning into eggs and hence conferring larvae resilience under harsh conditions. Larvae with a prior history of transgenerational exposure to elevated pCO2 developed faster and had a higher survival than those with no prior history of CO2 exposure. Transgenerational exposure significantly increased the number of larvae completing metamorphosis. While significant differences in shell growth were no longer observed during juvenile nursery and adult grow-out, transgenerationally exposed mussels displayed improved survival in comparison to non-transgenerationally exposed mussels. Metabolic plasticity arose following transgenerational acclimation, generating more energy available for fitness-related functions. Overall, the present study demonstrates the remarkable ability of M. senhousia to respond plastically and acclimate rapidly to changing ocean conditions.
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Affiliation(s)
- Liqiang Zhao
- Atmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan; Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Baozhan Liu
- CNOOC EnerTech-Safety & Environmental Protection Co., Tianjin 300457, China
| | - Wei An
- CNOOC EnerTech-Safety & Environmental Protection Co., Tianjin 300457, China
| | - Yuewen Deng
- Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Yanan Lu
- College of Life Science and Fisheries, Dalian Ocean University, Dalian 116023, China
| | - Bingxin Liu
- Navigation College, Dalian Maritime University, Dalian 116026, China
| | - Li Wang
- College of Life Science and Fisheries, Dalian Ocean University, Dalian 116023, China
| | - Yuting Cong
- College of Life Science and Fisheries, Dalian Ocean University, Dalian 116023, China
| | - Xin Sun
- Dalian Zhangzidao Fishery Group Co. Ltd., Dalian 116002, China
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134
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Ramajo L, Lagos NA, Duarte CM. Seagrass Posidonia oceanica diel pH fluctuations reduce the mortality of epiphytic forams under experimental ocean acidification. MARINE POLLUTION BULLETIN 2019; 146:247-254. [PMID: 31426153 DOI: 10.1016/j.marpolbul.2019.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 05/29/2019] [Accepted: 06/05/2019] [Indexed: 06/10/2023]
Abstract
It is hypothesized that pH fluctuations produced by seagrasses metabolism may confer marine calcifiers resistance to ocean acidification. Here, we tested this thesis by comparing the net population growth rate (NPGR) of a foraminifer species (Rosalina sp.) epiphytic of Mediterranean seagrass (Posidonia oceanica) to average current and projected pH scenarios under either stable conditions or diel fluctuations in pH of 0.3 units; variations similar to that experienced in their habitat. No significant differences were found in NPGRs between the fluctuating and stable pH treatments at current pH levels. NPGRs in treatments where pH fluctuated did not present significant differences to the treatment with high and stable pH conditions. In contrast, foraminifers exposed to stable low pH regimes experienced a steep decline in NPGR. These results suggest that diel pH fluctuations generated by P. oceanica photosynthetic activity could confer resistance to ocean acidification to Rosalina sp.
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Affiliation(s)
- Laura Ramajo
- Centro de Estudios Avazados en Zonas Áridas (CEAZA), Coquimbo, Chile; Centro de Investigación e Innovación para el Cambio Climático (CiiCC), Universidad Santo Tomás, Santiago, Chile.
| | - Nelson A Lagos
- Centro de Investigación e Innovación para el Cambio Climático (CiiCC), Universidad Santo Tomás, Santiago, Chile
| | - Carlos M Duarte
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center (RSRC), Thuwal, 23955-6900, Saudi Arabia
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135
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Hua E, Sun Y, Zhang Z, He L, Cui C, Mu F. Effects of reduced seawater pH on nematode community composition and diversity in sandy sediments. MARINE ENVIRONMENTAL RESEARCH 2019; 150:104773. [PMID: 31450037 DOI: 10.1016/j.marenvres.2019.104773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 08/01/2019] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
The present study investigated the potential effects of seawater acidification on the taxonomic structure and diversity of nematode communities using a microcosm experiment. Nematode samples for the microcosm experiment were collected from the low tidal zone of two sandy beaches with different sediment compositions (medium sand vs. very fine sand) in Qingdao (China). In the microcosm, nematode communities were exposed to nine experimental treatments comprising two pH levels for 56 days: 8.0 (ambient control) and 7.3. Communities were exposed for 0, 7, 14, 28, or 56 days. Results showed that the most distinguishable differences in nematode community structure and diversity indices were caused by sediment type. Reduced pH changed the taxonomic structure of nematode communities in medium sand sediments. An increase in species with higher tolerance to lowered pH occurred as a response and resulted in increased diversity in medium sand sediments. Nematode communities in finer sediments appeared less sensitive to reduced pH.
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Affiliation(s)
- Er Hua
- College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, PR China
| | - Yantao Sun
- College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, PR China
| | - Zhinan Zhang
- College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, PR China
| | - Lei He
- College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, PR China
| | - Chunyan Cui
- College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, PR China
| | - Fanghong Mu
- College of Marine Life Science, Ocean University of China, 5 Yushan Road, Qingdao, 266003, PR China.
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136
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Guamán-Guevara F, Austin H, Hicks N, Streeter R, Austin WEN. Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification. PLoS One 2019; 14:e0220046. [PMID: 31433797 PMCID: PMC6703850 DOI: 10.1371/journal.pone.0220046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 07/08/2019] [Indexed: 11/21/2022] Open
Abstract
Foraminifera are expected to be particularly susceptible to future changes in ocean carbonate chemistry as a function of increased atmospheric CO2. Studies in an experimental recirculating seawater system were performed with a dominant benthic foraminiferal species collected from intertidal mudflats. We investigated the experimental impacts of ocean acidification on survival, growth/calcification, morphology and the biometric features of a calcareous species Elphidium williamsoni. Foraminifera were exposed for 6 weeks to four different pH treatments that replicated future scenarios of a high CO2 atmosphere resulting in lower seawater pH. Results revealed that declining seawater pH caused a decline in foraminiferal survival rate and growth/calcification (mainly through test weight reduction). Scanning electron microscopy image analysis of live specimens at the end of the experimental period show changes in foraminiferal morphology with clear signs of corrosion and cracking on the test surface, septal bridges, sutures and feeding structures of specimens exposed to the lowest pH conditions. These findings suggest that the morphological changes observed in shell feeding structures may serve to alter: (1) foraminiferal feeding efficiency and their long-term ecological competitiveness, (2) the energy transferred within the benthic food web with a subsequent shift in benthic community structures and (3) carbon cycling and total CaCO3 production, both highly significant processes in coastal waters. These experimental results open-up the possibility of modelling future impacts of ocean acidification on both calcification and dissolution in benthic foraminifera within mid-latitude intertidal environments, with potential implications for understanding the changing marine carbon cycle.
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Affiliation(s)
- Fabricio Guamán-Guevara
- School of Geography and Sustainable Development, University of St. Andrews, St Andrews, Scotland
| | - Heather Austin
- School of Geography and Sustainable Development, University of St. Andrews, St Andrews, Scotland
| | - Natalie Hicks
- School of Biological Sciences, University of Essex, Colchester, United Kingdom
| | - Richard Streeter
- School of Geography and Sustainable Development, University of St. Andrews, St Andrews, Scotland
| | - William E. N. Austin
- School of Geography and Sustainable Development, University of St. Andrews, St Andrews, Scotland
- The Scottish Association for Marine Science (SAMS), Oban, Scotland
- * E-mail:
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137
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Uncovering mechanisms of global ocean change effects on the Dungeness crab (Cancer magister) through metabolomics analysis. Sci Rep 2019; 9:10717. [PMID: 31341175 PMCID: PMC6656712 DOI: 10.1038/s41598-019-46947-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 07/04/2019] [Indexed: 01/22/2023] Open
Abstract
The Dungeness crab is an economically and ecologically important species distributed along the North American Pacific coast. To predict how Dungeness crab may physiologically respond to future global ocean change on a molecular level, we performed untargeted metabolomic approaches on individual Dungeness crab juveniles reared in treatments that mimicked current and projected future pH and dissolved oxygen conditions. We found 94 metabolites and 127 lipids responded in a condition-specific manner, with a greater number of known compounds more strongly responding to low oxygen than low pH exposure. Pathway analysis of these compounds revealed that juveniles may respond to low oxygen through evolutionarily conserved processes including downregulating glutathione biosynthesis and upregulating glycogen storage, and may respond to low pH by increasing ATP production. Most interestingly, we found that the response of juveniles to combined low pH and low oxygen exposure was most similar to the low oxygen exposure response, indicating low oxygen may drive the physiology of juvenile crabs more than pH. Our study elucidates metabolic dynamics that expand our overall understanding of how the species might respond to future ocean conditions and provides a comprehensive dataset that could be used in future ocean acidification response studies.
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138
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Wang H, Niu X, Feng X, Gonçalves RJ, Guan W. Effects of ocean acidification and phosphate limitation on physiology and toxicity of the dinoflagellate Karenia mikimotoi. HARMFUL ALGAE 2019; 87:101621. [PMID: 31349890 DOI: 10.1016/j.hal.2019.101621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/17/2019] [Accepted: 05/29/2019] [Indexed: 06/10/2023]
Abstract
This work demonstrated a 10-day batch culture experiment to test the physiology and toxicity of harmful dinoflagellate Karenia mikimotoi in response to ocean acidification (OA) under two different phosphate concentrations. Cells were previously acclimated in OA (pH = 7.8 and CO2 = 1100 μatm) condition for about three months before testing the responses of K. mikimotoi cells to a two-factorial combinations experimentation. This work measured the variation in physiological parameters (growth, rETR) and toxicity (hemolytic activity and its toxicity to zebrafish embryos) in four treatments, representing two factorial combinations of CO2 (450 and 1100 μatm) and phosphate concentration (37.75 and 4.67 umol l-1). Results: OA stimulated the faster growth, and the highest rETRmax in high phosphate (HP) treatment, low phosphate (LP) and a combination of high CO2 and low phosphate (HC*LP) inhibited the growth and Ek in comparison to low CO2*high phosphate (LCHP) treatment. The embryotoxicity of K. mikimotoi cells enhanced in all high CO2 (HC) conditions irrespective of phosphate concentration, but the EC50 of hemolytic activity increased in all high CO2 (HC) and low phosphate (LP) treatments in comparison of LCHP. Ocean acidification (high CO2 and lower pH) was probably the main factor that affected the rETRmax, hemolytic activity and embryotoxicity, but low phosphate was the main factor that affected the growth, α, and Ek. There were significant interactive effects of OA and low phosphate (LP) on growth, rETRmax, and hemolytic activity, but there were no significant effects on α, Ek, and embryotoxicity. If these results are extrapolated to the aquatic environment, it can be hypothesized that the K. mikimotoi cells were impacted significantly by future changing ocean (e.g., ocean acidification and nutrient stoichiometry).
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Affiliation(s)
- Hong Wang
- Department of Marine Biotechnology, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China; Department of Medical Laboratory Technology, Xinyang Vocational and Technical College, Xinyang, Henan, 464000, China
| | - Xiaoqin Niu
- Department of Marine Biotechnology, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China
| | - Xinqian Feng
- Department of Marine Biotechnology, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China
| | - Rodrigo J Gonçalves
- Laboratorio de Oceanografía Biológica (LOBio), Centro para el Estudio de Sistemas Marinos (CESIMAR), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). U9120ACD Puerto Madryn, Argentina
| | - Wanchun Guan
- Department of Marine Biotechnology, School of Laboratory Medicine and Life Science, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China.
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139
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Su X, McCardle KM, Chen L, Panetier JA, Jurss JW. Robust and Selective Cobalt Catalysts Bearing Redox-Active Bipyridyl-N-heterocyclic Carbene Frameworks for Electrochemical CO2 Reduction in Aqueous Solutions. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00708] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Xiaojun Su
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Kaitlin M. McCardle
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Lizhu Chen
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Julien A. Panetier
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Jonah W. Jurss
- Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
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140
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Yan H, Shi Q, Yu K, Tao S, Yang H, Liu Y, Zhang H, Zhao M. Regional coral growth responses to seawater warming in the South China Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:595-605. [PMID: 30909037 DOI: 10.1016/j.scitotenv.2019.03.135] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/01/2019] [Accepted: 03/09/2019] [Indexed: 06/09/2023]
Abstract
Seawater temperature is one of the main environmental factors controlling coral skeleton growth. Sustained seawater warming is regarded as a major threat to coral growth and reef development. Coral reefs are widespread in the South China Sea (SCS), where the history and future of coral growth are of great concern. We integrated 99 linear extension rate series of the coral Porites from 12 locations at three regions in SCS, which include the Hainan Island (HN), the Xisha Islands (XS), and the Huangyan Island-Nansha Islands (HY-NS), and explored the regional responses of coral growth to sustained seawater warming. The sea surface temperature (SST) rose linearly by 0.47 °C, 0.71 °C, and 0.76 °C at HN, XS, and HY-HN, respectively, between 1900 and 2014. During this period, coral growth increased linearly by ~21.0% and ~0.7% at HN and XS, while HY-NS saw a decline of ~2.8% in coral growth. Moreover, interdecadal variations were found for both SST and coral growth. A nonlinear response relationship was revealed between coral growth and SST, with a thermal optimum of ~27.5 °C for Porites, which is responsible for the regional difference in the long-term trend in coral growth in SCS. In recent decades, reductions in coral growth have occurred in SCS, especially at HN, with the largest fall of ~15.1% over the past century, which is attributed mainly to intensifying human impacts instead of seawater warming. A preliminary estimate presents regional-different coral growths in SCS by the end of 21st century, with declines of ~8.9-16.3% under the atmospheric CO2 emission scenario (RCP 8.5), implying that the overall downturn of coral growth will be inevitable under the future sustained seawater warming in SCS. The mitigation of global warming is essential to maintain coral growth and coral reef ecosystems in SCS.
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Affiliation(s)
- Hongqiang Yan
- Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Qi Shi
- Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| | - Kefu Yu
- Coral Reef Research Center of China, Guangxi University, Nanning 530004, China
| | - Shichen Tao
- Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Hongqiang Yang
- Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Yi Liu
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300350, China
| | - Huiling Zhang
- Department of Ocean Engineering, Guangdong Ocean University, Zhanjiang 524088, China
| | - Meixia Zhao
- Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
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141
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Tang H, Xian H, He H, Wei J, Liu H, Zhu J, Zhu R. Kinetics and mechanisms of the interaction between the calcite (10.4) surface and Cu 2+-bearing solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 668:602-616. [PMID: 30856570 DOI: 10.1016/j.scitotenv.2019.02.232] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/26/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
Calcite dissolution, occurring in rocks, soils and sediments, is essential to indicate element cycles and local environments in the lithosphere, biosphere, hydrosphere and atmosphere. Calcite dissolution strongly depends on metal ions in aqueous solutions. Previous studies showed that aquatic Cu2+, a typical bio-toxic metal ion, can alter the calcite dissolution behavior. However, wide concentration ranges of Cu2+ coexisting with ubiquitous anions in local environments, such as waterways in the oxidation zones of copper deposits and soils near metal processing industry, was overlooked. When a considerable amount of aquatic Cu2+ ions are released into the environment, they migrate, diffuse, and hence become an environmental pollutant. Therefore, we focused on the interaction between calcite dissolution and wide concentration ranges of Cu2+-bearing solutions with different types of anions (SO42-, Cl- and NO3-). Comprehensive approaches including in situ atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), transmission electron microscope (TEM), and density functional theory (DFT) calculations were employed to investigate kinetics and mechanisms of the interaction between the calcite (10.4) surface and Cu2+-bearing solutions. Results demonstrated that both anion types and Cu2+ concentrations dramatically affect calcite dissolution. The morphology of etch pits generated in CuSO4 solutions can be fan-shaped but changed to tear-shaped in Cu(NO3)2 or CuCl2 solutions. Calcite dissolution kinetics is inhibited at cCu2+ ≤ 0.1 mM, caused by the coverage of active sites on calcite surfaces. As the Cu2+ concentration increases (1 mM ≤ cCu2+ ≤ 10 mM), calcite dissolution kinetics is enhanced due to the coupling effect of Cu2+-incorporated surface structure and solution chemistry. These results revealed the interactive mechanism between calcite dissolution and the migration of toxic Cu2+ in waterways, provided a practical consideration in dealing with the local environment.
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Affiliation(s)
- Hongmei Tang
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
| | - Haiyang Xian
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
| | - Hongping He
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
| | - Jingming Wei
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
| | - Hongmei Liu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
| | - Jianxi Zhu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
| | - Runliang Zhu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institutions of Earth Science, Chinese Academy of Sciences, Beijing 100029, China.
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142
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Asadollahfardi G, Katebi A, Taherian P, Panahandeh A. Environmental life cycle assessment of concrete with different mixed designs. INTERNATIONAL JOURNAL OF CONSTRUCTION MANAGEMENT 2019. [DOI: 10.1080/15623599.2019.1579015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- G. Asadollahfardi
- Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran
| | - A. Katebi
- Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran
| | - P. Taherian
- Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran
| | - A. Panahandeh
- Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran
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143
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De Marchi L, Pretti C, Chiellini F, Morelli A, Neto V, Soares AMVM, Figueira E, Freitas R. The influence of simulated global ocean acidification on the toxic effects of carbon nanoparticles on polychaetes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 666:1178-1187. [PMID: 30970483 DOI: 10.1016/j.scitotenv.2019.02.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/07/2019] [Accepted: 02/07/2019] [Indexed: 06/09/2023]
Abstract
Ocean acidification events are recognized as important drivers of change in biological systems. Particularly, the impacts of acidification are more severe in estuarine systems than in surface ocean due to their shallowness, low buffering capacity, low salinity and high organic matter from land drainage. Moreover, because they are transitional areas, estuaries can be seriously impacted by a vast number of anthropogenic activities and in the last decades, carbon nanomaterials (CNMs) are considered as emerging contaminants in these ecosystems. Considering all these evidences, chronic experiment was carried out, trying to understand the possible alteration on the chemical behaviour of two different CNMs (functionalized and pristine) in predicted climate change scenarios and consequently, how these alterations could modify the sensitivity of one the most common marine and estuarine organisms (the polychaeta Hediste diversicolor) assessing a set of biomarkers related to polychaetes oxidative status as well as the metabolic performance and neurotoxicity. Our results demonstrated that all enzymes worked together to counteract seawater acidification and CNMs, however oxidative stress in the exposed polychaetes to both CNMs, especially under ocean acidification conditions, was enhanced. In fact, although the antioxidant enzymes tried to cope as compensatory response of cellular defense systems against oxidative stress, the synergistic interactive effects of pH and functionalized CNMs indicated that acidified pH significantly increased the oxidative damage (in terms of lipid peroxidation) in the cotaminated organisms. Different responses were observed in organisms submitted to pristine CNMs under pH control, where the lipid peroxidation did not increase along with the increasing exposure concentrations. The present results further demonstrated neurotoxicity caused by both CNMs, especially noticeable at acidified conditions. The mechanism of enhanced toxicity could be attributed to slighter aggregation and more suspended NMs in acidified seawater (as demonstrated by the DLS analysis). Therefore, ocean acidification may cause a higher risk of CNMs to marine ecosystems.
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Affiliation(s)
- Lucia De Marchi
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro 3810-193, Aveiro, Portugal; Department of Mechanical Engineering & Center for Mechanical Technology and Automation (TEMA), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carlo Pretti
- Department of Veterinary Sciences, University of Pisa, San Piero a Grado, Pisa 56122, Italy
| | - Federica Chiellini
- Department of Chemistry and Industrial Chemistry, University of Pisa, Udr INSTM Pisa, Pisa 56126, Italy
| | - Andrea Morelli
- Department of Chemistry and Industrial Chemistry, University of Pisa, Udr INSTM Pisa, Pisa 56126, Italy
| | - Victor Neto
- Department of Mechanical Engineering & Center for Mechanical Technology and Automation (TEMA), University of Aveiro, 3810-193 Aveiro, Portugal
| | - Amadeu M V M Soares
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro 3810-193, Aveiro, Portugal
| | - Etelvina Figueira
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro 3810-193, Aveiro, Portugal
| | - Rosa Freitas
- Department of Biology & Center for Environmental and Marine Studies (CESAM), University of Aveiro 3810-193, Aveiro, Portugal.
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144
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Bushinsky SM, Takeshita Y, Williams NL. Observing Changes in Ocean Carbonate Chemistry: Our Autonomous Future. CURRENT CLIMATE CHANGE REPORTS 2019; 5:207-220. [PMID: 31404217 PMCID: PMC6659613 DOI: 10.1007/s40641-019-00129-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
PURPOSE OF REVIEW We summarize recent progress on autonomous observations of ocean carbonate chemistry and the development of a network of sensors capable of observing carbonate processes at multiple temporal and spatial scales. RECENT FINDINGS The development of versatile pH sensors suitable for both deployment on autonomous vehicles and in compact, fixed ecosystem observatories has been a major development in the field. The initial large-scale deployment of profiling floats equipped with these new pH sensors in the Southern Ocean has demonstrated the feasibility of a global autonomous open-ocean carbonate observing system. SUMMARY Our developing network of autonomous carbonate observations is currently targeted at surface ocean CO2 fluxes and compact ecosystem observatories. New integration of developed sensors on gliders and surface vehicles will increase our coastal and regional observational capability. Most autonomous platforms observe a single carbonate parameter, which leaves us reliant on the use of empirical relationships to constrain the rest of the carbonate system. Sensors now in development promise the ability to observe multiple carbonate system parameters from a range of vehicles in the near future.
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Affiliation(s)
- Seth M. Bushinsky
- Program in Atmospheric and Oceanic Sciences, Princeton University, 300 Forrestal Road, Sayre Hall, Princeton, NJ 08544 USA
| | - Yuichiro Takeshita
- Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing, CA USA
| | - Nancy L. Williams
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, 7600 Sand Point Way, NE, Seattle, WA USA
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145
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Gruber N, Clement D, Carter BR, Feely RA, van Heuven S, Hoppema M, Ishii M, Key RM, Kozyr A, Lauvset SK, Lo Monaco C, Mathis JT, Murata A, Olsen A, Perez FF, Sabine CL, Tanhua T, Wanninkhof R. The oceanic sink for anthropogenic CO 2 from 1994 to 2007. Science 2019; 363:1193-1199. [PMID: 30872519 DOI: 10.1126/science.aau5153] [Citation(s) in RCA: 116] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 02/19/2019] [Indexed: 01/23/2023]
Abstract
We quantify the oceanic sink for anthropogenic carbon dioxide (CO2) over the period 1994 to 2007 by using observations from the global repeat hydrography program and contrasting them to observations from the 1990s. Using a linear regression-based method, we find a global increase in the anthropogenic CO2 inventory of 34 ± 4 petagrams of carbon (Pg C) between 1994 and 2007. This is equivalent to an average uptake rate of 2.6 ± 0.3 Pg C year-1 and represents 31 ± 4% of the global anthropogenic CO2 emissions over this period. Although this global ocean sink estimate is consistent with the expectation of the ocean uptake having increased in proportion to the rise in atmospheric CO2, substantial regional differences in storage rate are found, likely owing to climate variability-driven changes in ocean circulation.
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Affiliation(s)
- Nicolas Gruber
- Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland.
| | - Dominic Clement
- Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland
| | - Brendan R Carter
- National Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Seattle, WA, USA.,Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, USA
| | - Richard A Feely
- National Oceanic and Atmospheric Administration, Pacific Marine Environmental Laboratory, Seattle, WA, USA
| | - Steven van Heuven
- Centre for Isotope Research, Faculty of Science and Engineering, University of Groningen, Groningen, Netherlands
| | - Mario Hoppema
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
| | - Masao Ishii
- Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan
| | - Robert M Key
- Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA
| | - Alex Kozyr
- NOAA National Centers for Environmental Information, Silver Spring, MD, USA
| | - Siv K Lauvset
- NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway.,Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
| | | | - Jeremy T Mathis
- National Oceanic and Atmospheric Administration, Arctic Research Program, Silver Spring, MD, USA
| | - Akihiko Murata
- Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
| | - Are Olsen
- Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
| | - Fiz F Perez
- Instituto de Investigaciones Marinas, CSIC (IIM-CSIC), Vigo, Spain
| | | | - Toste Tanhua
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Rik Wanninkhof
- National Oceanic and Atmospheric Administration, Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, USA
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146
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O'Mara NA, Dunne JP. Hot Spots of Carbon and Alkalinity Cycling in the Coastal Oceans. Sci Rep 2019; 9:4434. [PMID: 30872724 PMCID: PMC6418168 DOI: 10.1038/s41598-019-41064-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 02/22/2019] [Indexed: 11/21/2022] Open
Abstract
Ocean calcium carbonate (CaCO3) production and preservation play a key role in the global carbon cycle. Coastal and continental shelf (neritic) environments account for more than half of global CaCO3 accumulation. Previous neritic CaCO3 budgets have been limited in both spatial resolution and ability to project responses to environmental change. Here, a 1° spatially explicit budget for neritic CaCO3 accumulation is developed. Globally gridded satellite and benthic community area data are used to estimate community CaCO3 production. Accumulation rates (PgC yr−1) of four neritic environments are calculated: coral reefs/banks (0.084), seagrass-dominated embayments (0.043), and carbonate rich (0.037) and poor (0.0002) shelves. This analysis refines previous neritic CaCO3 accumulation estimates (~0.16) and shows almost all coastal carbonate accumulation occurs in the tropics, >50% of coral reef accumulation occurs in the Western Pacific Ocean, and 80% of coral reef, 63% of carbonate shelf, and 58% of bay accumulation occur within three global carbonate hot spots: the Western Pacific Ocean, Eastern Indian Ocean, and Caribbean Sea. These algorithms are amenable for incorporation into Earth System Models that represent open ocean pelagic CaCO3 production and deep-sea preservation and assess impacts and feedbacks of environmental change.
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Affiliation(s)
- Nicholas A O'Mara
- Department of Earth and Environmental Sciences, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA. .,Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, USA.
| | - John P Dunne
- NOAA Geophysical Fluid Dynamics Laboratory, 201 Forrestal Rd, Princeton, NJ, USA
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147
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Doubleday ZA, Nagelkerken I, Coutts MD, Goldenberg SU, Connell SD. A triple trophic boost: How carbon emissions indirectly change a marine food chain. GLOBAL CHANGE BIOLOGY 2019; 25:978-984. [PMID: 30500999 DOI: 10.1111/gcb.14536] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
The pervasive enrichment of CO2 in our oceans is a well-documented stressor to marine life. Yet, there is little understanding about how CO2 affects species indirectly in naturally complex communities. Using natural CO2 vents, we investigated the indirect effects of CO2 enrichment through a marine food chain. We show how CO2 boosted the biomass of three trophic levels: from the primary producers (algae), through to their grazers (gastropods), and finally through to their predators (fish). We also found that consumption by both grazers and predators intensified under CO2 enrichment, but, ultimately, this top-down control failed to compensate for the boosted biomass of both primary producers and herbivores (bottom-up control). Our study suggests that indirect effects can buffer the ubiquitous and direct, negative effects of CO2 enrichment by allowing the upward propagation of resources through the food chain. Maintaining the natural complexity of food webs in our ocean communities could, therefore, help minimize the future impacts of CO2 enrichment.
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Affiliation(s)
- Zoë A Doubleday
- School of Biological Sciences and The Environment Institute, The University of Adelaide, Adelaide, South Australia
| | - Ivan Nagelkerken
- School of Biological Sciences and The Environment Institute, The University of Adelaide, Adelaide, South Australia
| | - Madeleine D Coutts
- School of Biological Sciences and The Environment Institute, The University of Adelaide, Adelaide, South Australia
| | - Silvan U Goldenberg
- School of Biological Sciences and The Environment Institute, The University of Adelaide, Adelaide, South Australia
| | - Sean D Connell
- School of Biological Sciences and The Environment Institute, The University of Adelaide, Adelaide, South Australia
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148
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Kong H, Jiang X, Clements JC, Wang T, Huang X, Shang Y, Chen J, Hu M, Wang Y. Transgenerational effects of short-term exposure to acidification and hypoxia on early developmental traits of the mussel Mytilus edulis. MARINE ENVIRONMENTAL RESEARCH 2019; 145:73-80. [PMID: 30833041 DOI: 10.1016/j.marenvres.2019.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 02/17/2019] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Transgenerational effects of multiple stressors on marine organisms are emerging environmental themes. We thus experimentally tested for transgenerational effects of seawater acidification and hypoxia on the early development traits of the mussel Mytilus edulis. Fertilization rate, embryo deformity rate, and larval shell length were negatively impacted by acidification, while hypoxia had little effect except for increasing deformity rates under control pH conditions. Offspring from low pH/O2 parents were less negatively affected by low pH/O2 conditions than offspring from control parents; however, low pH/O2 conditions still negatively affected developmental traits in offspring from acclimated parents compared to control seawater conditions. Our results demonstrate that experimental seawater acidification and hypoxia can adversely affect early developmental traits of M. edulis and that parental exposure can only partially alleviate these impacts. If experimental observations hold true in nature, it is unlikely that parental exposure will confer larval tolerance to ocean acidification for M. edulis.
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Affiliation(s)
- Hui Kong
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Xiaoyu Jiang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Jeff C Clements
- Department of Biology, Norwegian University of Science and Technology, Realfagbygget, Høgskoleringen 5, NO-7491, Trondheim, Norway
| | - Ting Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Xizhi Huang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Yueyong Shang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Jianfang Chen
- Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China
| | - Menghong Hu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China
| | - Youji Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, 999 Huchenghuan Road, Shanghai, 201306, China; International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, China.
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149
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Mellado C, Chaparro OR, Duarte C, Villanueva PA, Ortiz A, Valdivia N, Torres R, Navarro JM. Ocean acidification exacerbates the effects of paralytic shellfish toxins on the fitness of the edible mussel Mytilus chilensis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:455-464. [PMID: 30412890 DOI: 10.1016/j.scitotenv.2018.10.399] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 10/26/2018] [Accepted: 10/28/2018] [Indexed: 06/08/2023]
Abstract
High latitudes are considered particularly vulnerable to ocean acidification, since they are naturally low in carbonate ions. The edible mussel Mytilus chilensis is a common calcifier inhabiting marine ecosystems of the southern Chile, where culturing of this species is concentrated and where algal blooms produced by the toxic dinoflagellate A. catenella are becoming more frequent. Juvenile Mytilus chilensis were exposed to experimental conditions simulating two environmental phenomena: pCO2 increase and the presence of paralytic shellfish toxins (PST) produced by the dinoflagellate Alexandrium catenella. Individuals were exposed to two levels of pCO2: 380 μatm (control condition) and 1000 μatm (future conditions) over a period of 39 days (acclimation), followed by another period of 40 days exposure to a combination of pCO2 and PST. Both factors significantly affected most of the physiological variables measured (feeding, metabolism and scope for growth). However, these effects greatly varied over time, which can be explained by the high individual variability described for mussels exposed to different environmental conditions. Absorption efficiency was not affected by the independent effect of the toxic diet; however, the diet and pCO2 interaction affected it significantly. The inhibition of the physiological processes related with energy acquisition by diets containing PST, may negatively impact mussel fitness, which could have important consequences for both wild and cultured mussel populations, and thus, for socioeconomic development in southern Chile.
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Affiliation(s)
- Carla Mellado
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Calfuco, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Oscar R Chaparro
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Calfuco, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Cristian Duarte
- Departamento de Ecología y Biodiversidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Paola A Villanueva
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Calfuco, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Alejandro Ortiz
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Calfuco, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - Nelson Valdivia
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Calfuco, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile
| | - Rodrigo Torres
- Centro de Investigación en Ecosistemas de la Patagonia (CIEP), Coyhaique, Chile
| | - Jorge M Navarro
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Calfuco, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile.
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150
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Analysis of Physical and Biogeochemical Control Mechanisms on Summertime Surface Carbonate System Variability in the Western Ross Sea (Antarctica) Using In Situ and Satellite Data. REMOTE SENSING 2019. [DOI: 10.3390/rs11030238] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this study, carbonate system properties were measured in the western Ross Sea (Antarctica) over the 2005–2006 and 2011–2012 austral summers with the aim of analysing their sensitivity to physical and biogeochemical drivers. Daily Advanced Microwave Scanning Radiometer 2 (AMSR2) sea ice concentration maps, obtained prior to and during the samplings, were used to analyse the sea ice evolution throughout the experiment periods. Monthly means and 8-day composite chlorophyll concentration maps from the Moderate-resolution Imaging Spectroradiometer (MODIS) Aqua satellite at 4-km resolution were used to investigate inter-annual and basin scale biological variability. Chlorophyll-a concentrations in surface waters estimated by MODIS satellite data contribute to descriptions of the variability of carbonate system properties in surface waters. Mean values of carbonate system properties were comparable across both investigated years; however, the 2012 data displayed larger variability. Sea ice melting also had a pivotal role in controlling the carbonate system chemistry of the mixed layer both directly through dilution processes and indirectly by favouring the development of phytoplankton blooms. This resulted in high pH and ΩAr, and in low CT, particularly in those areas where high chlorophyll concentration was shown by satellite maps.
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