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Integrated biomarker response to assess toxic impacts of iron and manganese on deep-sea mussel Gigantidas platifrons under a deep-sea mining activity scenario

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Journal of Oceanology and limnology 2024年第2期42卷 522-532页

作者： li ZHOU Mengna li Zhaoshan ZHONG Minxiao WANG Hao CHEN Chao liAN Hao WANG Huan ZHANG Lei CAO chaolun li Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laoshan Laboratory Qingdao 266237China South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Deep-sea mining activities can potentially release metals,which pose a toxicological threat to deep-sea ecosystems.Nevertheless,due to the remoteness and inaccessibility of the deep-sea biosphere,there is insufficient knowledge about the impact of metal exposure on its inhabitants.In this study,deep-sea mussel Gigantidas platifrons,a commonly used deep-sea toxicology model organism,was exposed to manganese(100,1000μg/L)or iron(500,5000μg/L)for 7 d,respectively.Manganese and iron were chosen for their high levels of occurrence within deep-sea deposits.Metal accumulation and a battery of biochemical biomarkers related to antioxidative stress in superoxide dismutase(SOD),catalase(CAT),malondialdehyde(MDA);immune function in alkaline phosphatase(AKP),acid phosphatase(ACP);and energy metabolism in pyruvate kinase(PK)and hexokinase(HK)were assessed in mussel gills.Results showed that deep-sea mussel G.platifrons exhibited a high capacity to accumulate Mn/Fe.In addition,most tested biochemical parameters were altered by metal exposure,demonstrating that metals could induce oxidative stress,suppress the immune system,and affect energy metabolism of deep-sea mussels.The integrated biomarker response(IBR)approach indicated that the exposure to Mn/Fe had a negative impact on deep-sea mussels,and Mn demonstrated a more harmful impact on deep-sea mussels than Fe.Additionally,SOD and CAT biomarkers had the greatest impact on IBR values in Mn treatments,while ACP and HK were most influential for the low-and high-dose Fe groups,respectively.This study represents the first application of the IBR approach to evaluate the toxicity of metals on deep-sea fauna and serves as a crucial framework for risk assessment of deep-sea mining-associated metal exposure.

关键词： mussel metal deep-sea mining biomarker environmental monitoring

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Inductive eff ect of bioactive substances on strobilation of jellyfi sh Aurelia coerulea

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Journal of Oceanology and limnology 2020年第5期38卷 1548-1558页

作者： WANG Nan WANG Minxiao WANG Yantao li chaolun Key Laboratory of Marine Ecology and Environmental Sciences Center of Deep-sea ResearchInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The moon jellyfi sh Aurelia spp.is a worldwide distributed scyphozoan species that seasonally blooms in coastal waters.Although the strobilation is directly responsible for the scale of jellyfi sh bloom,the underlying mechanisms remain largely unknown.We exposed Aurelia coerulea polyps to 18 bioactive substances to test their ability to induce strobilation at the natural typically non-strobilation temperature of 21°C.Results revealed that A.coerulea polyps responded in four types.Type I—no change for estradiol,folic acid,iodine,retinoic acid,serotonin hydrochloride,and vitamin A.We suggested that 5-aza-2-deoxycytidine and N-acetyl-L-glutamic acid could not induce strobilation,since the percent of strobilated polyps in these two substances treatments was 3.3%and 1%,respectively.Type II—polyp body elongation for 3,5-diiodo-Ltyrosine,indole-3-acetic acid,L-dopamine,and noradrenaline treatments.Type III—transverse constrictions for L-thyroxine,progesterone,and melatonin treatments.Finally,Type IV—complete strobilation for 5-methoxy-2-methylindole,acetylcholine chloride,and indomethacin treatments,where the pre-strobilation periods were 2,4,and 2 days,and the mean numbers of ephyrae released per strobila were 4.7,5.7,and 5.7,respectively.The results reveal that indole derivatives,which contained methoxy or methyl pharmacophore,were the common strobilation inducer in the genus Aurelia.Iodinated organic compounds,catecholamine,acetylcholine chloride,and retinoic acid are species-specifi c strobilation inducer.Therefore,A.coerulea strobilation is regulated by neuronal and endocrine processes.Our fi ndings provide clues in understanding the mechanism of strobilation and contribute to developing specifi c strobilation antagonists in controlling moon jellyfi sh blooms.

关键词： Aurelia coerulea jellyfi sh strobilation bioactive substances metamorphosis

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Fatty Acid Composition of Euphausia superba,Thysanoessa macrura and Euphausia crystallorophias Collected from Prydz Bay,Antarctica

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Journal of Ocean University of China 2016年第2期15卷 297-302页

作者： YANG Guang li chaolun WANG Yanqing Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of Sciences

The information of trophic relationship is important for studying the Southern Ocean ecosystems.In this study,three dominant krill species,Euphausia superba,Thysanoessa macrura and Euphausia crystallorophias,were collected from Prydz Bay,Antarctica,during austral summer of 2009/2010.The composition of fatty acids in these species was studied.E.superba and T.macrura showed a similar fatty acid composition which was dominated by C14:0,C16:0,EPA(eicosapentenoic acid) and DHA(decosahexenoic acid) while E.crystallorophias showed higher contents of C18:1(n-9),C18:1(n-7),DHA and EPA than the former two.Higher fatty acid ratios of C18:1(n-9)/18:1(n-7),PUFA(polyunsaturated fatty acid)/SFA(saturated fatty acid),and 18PUFA/16 PUFA indicated that E.crystallorophias should be classified as a typical omnivore with a higher trophic position compared with E.superba and T.macrura.

关键词：南极普里兹湾脂肪酸组成南极磷虾收集多不饱和脂肪酸木荷海洋生态系统营养关系

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Gametogenesis and reproductive traits of the cold-seep mussel Gigantidas platifrons in the South China Sea

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Journal of Oceanology and limnology 2020年第4期38卷 1304-1318页

作者： ZHONG Zhaoshan WANG Minxiao CHEN Hao ZHENG Ping li chaolun CODR and KLMEES Institute of OceanologyChinese Academy of Sciences University of Chinese Academy of Sciences Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Center for Ocean Mega-Science Chinese Academy of Sciences Center for Genomics and Biotechnology Fujian Agriculture and Forestry University

Gigantidas platifrons(Bivalvia,Mytilidae),the dominant species at the Formosa cold seep,relies on methanotrophic symbionts dwelling in its gills for nutrition.The reproductive patterns of G.platifrons provide fundamental information for understanding the population recruitment of this species.However,we know very little about important processes in reproduction,such as gametogenesis and symbiotic bacteria transmission.To this end,we described the developmental patterns of the gonads from nine surveys and juvenile length-distribution from one-year larval traps and detected bacteria in gonad from G.platifrons samples.Our results show that G.platifrons is a functionally dioecious species.The reproduction of G.platifrons is discontinuous,with spawning maturity peak around the fourth quarter of the year.The seasonal reproduction of G.platifrons was further supported by the unimodal shell length distribution of the trapped juvenile mussels.Given the small oocyte size(48.99-70.14 μm),which was comparable to that of coastal mussels,we proposed that G.platifrons developed via a free-living,planktotrophic larval stage before settlement.The blooms at the water surface can also supply the development of the planktonic larvae of G.platifrons.Meanwhile,no bacteria were observed in gonads,suggesting a horizontal symbiont transfer mode in this mussel.Collectively,these results provide fundamental biological information for an improved understanding of the early life history of G.platifrons in the Formosa cold seep.

关键词： cold seep gametogenesis Gigantidas platifrons reproductive South China Sea(SCS)

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Effects of nutrient limitations on three species of zooplankton

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Acta Oceanologica Sinica 2018年第4期37卷 58-68页

作者： CHEN Lei li chaolun ZHOU Konglin SHI Yongqiang liU Mengtan Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China Center of Deep Sea Research Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Key Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Key Laboratory of Sustainable Development of Marine Fisheries of Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China Jiaozhou Bay Marine Ecosystem Research Station Chinese Ecosystem Research Network Qingdao 266071 China

Nutrient imbalance—a mismatch in nutrient ratios between the available food supply and the demands of consumers—has the potential to be transported up food chains,exposing zooplankton to nutrient limitations.In this study,the response of Calanus sinicus（copepod）,Moina mongolica（cladocera）,and Brachionus plicatilis（rotifer） to nutrient-limited（no-limited,P-limited,and N-limited） food were evaluated from the perspective of growth,reproduction,and stoichiometric homoeostasis.The results indicated that the growth of three species was suppressed under nutrient-limited（especially P-limited） conditions.However,the effect of nutrient limitations on their reproduction was species-specific.For C.sinicus,the dietary UFA（unsaturated fatty acid） as a major phospholipid component affected their egg production and total FA supporting energy promoted the hatchability of eggs.Furthermore,excess carbon in the diet promoted egg production but reduced hatching success.For M.mongolica,nutritional（P and UFA） and energy（total FA） support affected their fecundity.B.plicatilis fecundity exhibited the same pattern of growth（no-limited〉N-limited〉P-limited）.In terms of stoichiometric homeostasis,B.plicatilis＇ s elemental compositions were less likely to be affected by nutrient limitations than M.mongolica.We suggest that the effects of nutrient imbalances could potentially become an evolutionary force affecting ecosystem structure and stability in eutrophic waters.

关键词： zooplankton nutrient growth reproduction stoichiometric homoeostasis

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Effects of liaoning Hongyanhe Nuclear Power Plant on the Zooplankton Community in Summer of 2017

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Journal of Ocean University of China 2020年第5期19卷 1140-1152页

作者： WANG Junjian TAO Zhencheng WANG Yantao WEI Hao liU Xin li chaolun CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China School of Marine Science and Technology Tianjin UniversityTianjin 300072China State Key Laboratory of Marine Environmental Science Xiamen UniversityXiamen 361005China

To evaluate the effects of the Hongyanhe Nuclear Power Plant on the zooplankton community in the surrounding seawater during summer, multiple environmental factors and zooplankton distribution along the east coast of liaodong Bay were investigated in the summer of 2017. In particular, the influences of seawater temperature, salinity, and chlorophyll a(Chl a) on the zooplankton community were analyzed. Zooplankton abundances and Chl a concentrations along the east coast of liaodong Bay showed an initial increase followed by a decrease from July to September. During the three months, the zooplankton abundance was the highest(8116.70 ind m^(-3)) in August. The Shannon-Wiener index showed a downtrend from July to September, with the average value falling from 1.65 in July to 1.50 in September. Calanus sinicus, Paracalanus parvus, copepodid, and bivalve larvae were the dominant species/groups in the three months. The effects of the nuclear power plant's outlet on the environment factors were mainly reflected in the increased seawater temperature. Redundancy analysis showed that the zooplankton community was jointly affected by seawater temperature, salinity and Chl a concentration, and the degree of this impact varied monthly. The impact of seawater temperature on the zooplankton community was stronger than that of salinity. The primary impact of the Hongyanhe Nuclear Power Plant on the structure and distribution of the zooplankton community in the surrounding seawater during the summer was increased seawater temperature, which caused a reduction in the abundance of dominant species/groups.

关键词： zooplankton abundance community structure diversity environmental factor Hongyanhe Nuclear Power Plant

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Experimental clearance rates of Aurelia coerulea ephyrae and medusae,and the predation impact on zooplankton in Jiaozhou Bay

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Journal of Oceanology and limnology 2020年第4期38卷 1256-1269页

作者： WANG Pengpeng ZHANG Fang SUN Song WANG Weicheng WAN Aiyong li chaolun CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Sciences Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The population explosion of jellyfish Aurelia coerulea occurred in Jiaozhou Bay,China in 2009.The potential predation impact of A.coerulea on zooplankton was investigated.Population clearance potential and residence time(t 1/2)for copepods were calculated from laboratory clearance rates and measurements of jellyfish size and abundance from May to August 2009 in Jiaozhou Bay.Clearance rates varied widely with prey organisms,but they were not significantly different among various prey concentrations.Medusae captured rotifers,fish larvae and hydromedusae more efficiently than fish eggs,copepods and chaetognaths.Ephyrae captured rotifers and hydromedusae more efficiently than fish larvae and copepods.Clearance rate linearly increased with the cross sectional area of A.coerulea(size from 0.3 to 7.1 cm).Water temperature also had a marked effect on clearance rate and this was related to the increased beat frequency as water temperature increased.In early May 2009,A.coerulea potentially cleared the volume of water in the Bay less than 0.001 times a day,but this value was estimated to be more than 0.3 times a day in July.The t 1/2 for copepods was less than 6 d in June and July.Abundances of copepods,hydromedusae and chaetognaths were extremely low in 2009 compared to 2008 and 2010(jellyfish non-bloom years).Large predation pressure by the A.coerulea population occurred to control zooplankton communities in Jiaozhou Bay.A.coerulea,when present at a high population level,can be a keystone species in Jiaozhou Bay and control the trophic structure here.

关键词： scyphomedusae predation pressure prey selection zooplankton control jellyfish bloom

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Bacterial and archaeal community structures in the Arctic deepsea sediment

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Acta Oceanologica Sinica 2015年第2期34卷 93-113页

作者： li Yan liU Qun li chaolun DONG Yi ZHANG Wenyan ZHANG Wuchang XIAO Tian Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Center for Transport Phenomena Energy Research Institute Shandong Academy of Sciences State Field Research Station of Jiaozhou Bay Marine Ecology Institute of Oceanology Chinese Academy of Sciences

Microbial community structures in the Arctic deep-sea sedimentary ecosystem are determined by organic matter input, energy availability, and other environmental factors. However, global warming and earlier ice-cover melting are affecting the microbial diversity. To characterize the Arctic deep-sea sediment microbial diversity and its relationship with environmental factors, we applied Roche 454 sequencing of 16 S r DNA amplicons from Arctic deep-sea sediment sample. Both bacterial and archaeal communities＇ richness, compositions and structures as well as taxonomic and phylogenetic affiliations of identified clades were characterized. Phylotypes relating to sulfur reduction and chemoorganotrophic lifestyle are major groups in the bacterial groups; while the archaeal community is dominated by phylotypes most closely related to the ammonia-oxidizing Thaumarchaeota（96.66%） and methanogenic Euryarchaeota（3.21%）. This study describes the microbial diversity in the Arctic deep marine sediment（〉3 500 m） near the North Pole and would lay foundation for future functional analysis on microbial metabolic processes and pathways predictions in similar environments.

关键词： Arctic,deep-sea sediment,microbial community structure,pyrosequencing

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Ontogenetic diet shift in Antarctic krill(Euphausia superba)in the Prydz Bay:a stable isotope analysis

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Acta Oceanologica Sinica 2017年第12期36卷 67-78页

作者： ZHANG Ye li chaolun YANG Guang WANG Yanqing TAO Zhencheng ZHANG Yongshan WANG Aijun Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Third Institute of Oceanography State Oceanic AdministrationXiamen 361005China

As one of the most common and dominant species in the Southern Ocean, Antarctic krill（Euphausia superba）play a significant role in food web structure and the process of energy flow. The diet of Antarctic krill in the Prydz Bay during austral summer of 2012/2013 was investigated and the ontogenetic shift in krill diet was evaluated using the stable isotope method. The nitrogen stable isotope values（δ^（15） N） of adults（（2.78±0.58）‰） were much higher than those of juveniles（（1.69±0.70）‰）, whereas the carbon stable isotope values（δ^（13） C） of adults（–（28.26±1.08）‰） were slightly lower than those of juveniles（–（27.48±1.35）‰）. Particulate organic matter（POM）from 0, 25, and 50 m depth combined（0/25/50 m） represented phytoplankton food items. The results showed that phytoplankton food items in surface water and mesozooplankton were two essential food items for Antarctic krill in the Prydz Bay during summer. POM（0/25/50 m） contributes 56%–69% and 26%–34% to the diet of juvenile and adult krill, respectively, whereas mesozooplankton composes 13%–34% and 58%–71% of the diet of juvenile and adult krill, respectively. Thus, an ontogenetic diet shift from POM（0/25/50 m）, which consists mainly of phytoplankton, to a higher trophic level diet containing mesozooplankton, was detected. The capacity for adults to consume more zooplankton food items may minimize their food competition with juveniles, which rely mostly on phytoplankton food items. This suggests ＂diet shift with ontogeny＂ which may somehow help krill keep their dietary energy budget balanced and well adapted to the Antarctic marine ecosystem as a dominant species.

关键词： Antarctic krill Prydz Bay diet shift stable isotope Iso Source

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Identification and characterization of endosymbiosis-related immune genes in deep-sea mussels Gigantidas platifrons

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Journal of Oceanology and limnology 2020年第4期38卷 1292-1303页

作者： li Mengna CHEN Hao WANG Minxiao ZHONG Zhaoshan ZHOU li li chaolun Center of Deep Sea Research and Key Laboratory of Marine Ecology&Environmental Sciences(CODR and KLMEES) Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Deep-sea mussels of the subfamily Bathymodiolinae are common and numerically dominant species widely distributed in cold seeps and hydrothermal vents.During long-time evolution,deep-sea mussels have evolved to be well adapted to the local environment of cold seeps and hydrothermal vents by various ways,especially by establishing endosymbiosis with chemotrophic bacteria.However,biological processes underlying the establishment and maintenance of symbiosis between host mussels and symbionts are largely unclear.In the present study,Gigantidas platifrons genes possibly involved in the symbiosis with methane oxidation symbionts were identified and characterized by lipopolysaccharide(LPS)pull-down and in situ hybridization.Five immune related proteins including Toll-like receptor 2(TLR2),integrin,vacuolar sorting protein(VSP),matrix metalloproteinase 1(MMP1),and leucine-rich repeat(LRR-1)were identified by LPS pull-down assay.These five proteins were all conserved in either molecular sequences or functional domains and known to be key molecules in host immune recognition,phagocytosis,and lysosome-mediated digestion.Furthermore,in situ hybridization of LRR-1,TLR2 and VSP genes was conducted to investigate their expression patterns in gill tissues of G.platifrons.Consequently,LRR-1,TLR2,and VSP genes were found expressed exclusively in the bacteriocytes of G.platifrons.Therefore,it was suggested that TLR2,integrin,VSP,MMP1,and LRR-1 might be crucial molecules in the symbiosis between G.platifrons and methane oxidation bacteria by participating in symbiosis-related immune processes.

关键词： Gigantidas platifrons endosymbiosis innate immunity pull-down assay immune recognition methane oxidation bacteria

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