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Genome-wide SNP markers provided insights into the reproductive strategy and genetic diversity of the green tide causative species Ulva prolifera in China

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Journal of Oceanology and Limnology 2024年第2期42卷 533-543页

作者： song sun Weiwei MA Nan WANG song FENG Yan sun CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Laoshan LaboratoryQingdao 266237China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Ulva prolifera is the causative species of the annually occurring large-scale green tides in China since *** specific biological features on reproductivity strategies,as well as intra-species genetic diversity,are still largely unknown,especially at the genome level,despite their importance in understanding the formation and outbreak of massive green *** the present study,the restriction site-associated DNA genotyping approach(2b-RAD)was adopted to identify the genome-wide single-nucleotide polymorphisms(SNPs)of 54 individual thalli including samples collected from Subei Shoal in 2019 and Qingdao coast from 2019 to *** genotype results revealed that most of the thalli in 2019 and 2020 were haploid gametophytes,while only half of the thalli were gametophytes in 2021,indicating flexibility in the reproductive strategies for the formation of the green tides among different years and the dominance of asexual and vegetative reproductive mode for the floating ***,population analysis was conducted,and it revealed a very low genetic diversity among samples from Subei Shoal and the Qingdao coast in the same year and a higher divergence among samples in different *** results showed the efficiency of 2b-RAD in the exploration of SNPs in *** and provided the first genome-wide scale evidence for the origin of the large-scale green tides on the Qingdao *** study improved our understanding of the reproductive strategy and genetic diversity of the green tide causative species and will help further reveal the biological causes of the green tide in China.

关键词： green tide Ulva prolifera 2b-RAD single-nucleotide polymorphism(SNP) reproductive strategy genetic diversity

A new candidate as the cathode material for intermediate and low temperature SOFCs

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Rare Metals 2006年第z1期25卷 213-217页

作者： LI song sun Xueli WEN Zhongsheng sun Juncai Institute of Materials and Technology Dalian Maritme University Dalian 11606 China Institute of Materials and Technology Dalian Maritme University Dalian 11606 China Institute of Materials and Technology Dalian Maritme University Dalian 11606 China Institute of Materials and Technology Dalian Maritme University Dalian 11606 China

In order to develop the new cathode materials suitable for intermediate and low temperature solid oxide fuel cells (IT/LTSOFCs), LaNi1-xFexO3 (x=0.4-0.8) (LNF) materials were synthesized using coprecipitation method. Their structures and morphologies were investigated by XRD and SEM, and their electronic conductivities at different temperatures were measured by dc four terminal method. Fuel cells were fabricated to evaluate the electrochemical properties of the LNF materials as cathodes at different temperatures. The performance of 450-497 mW·cm-2 was obtained in the temperature region of 580-650 ℃ for the LaNi0.2Fe0.8O3 cathode, and of 209-227 mW·cm-2 at 400-500 ℃ for the LaNi0.4Fe0.6O3. The excellent fuel cell performances indicate that the LNF materials are good cathodes for IT/LTSOFCs.

关键词： LaNi1-xFexO3 cathode materials coprecipitation method IT/LTSOFC

To be the best in marine sciences

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Journal of Oceanology and Limnology 2020年第4期38卷 897-905页

作者： sun song WANG Fan Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

Every institute in the world has its own history,culture,and legacy that show its unique *** an oldest,largest,and one of the most advanced institute in marine sciences in China,the Institute of Oceanology,Chinese Academy of Sciences(IOCAS)was established by her founders in 1950 and cherished by her successors ever *** has undertaken her own development roadmap over the last seventy *** people know its history,achievements,and contributions in marine sciences,but few would know the stories behind the *** paper intends to reveal the driven factors pushing the institute forward in the past,present,and future.

关键词： mariculture ocean health deep sea Institute of Oceanology,Chinese Academy of Sciences(IOCAS)

Natural predators of polyps of three scyphozoans:Nemopilema nomurai,Aurelia coerulea,and Rhopilema esculentum

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Journal of Oceanology and Limnology 2021年第2期39卷 598-608页

作者： Changsheng TANG song sun Fang ZHANG Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Sciences Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China

Jellyfish blooms have become a hot research topic in recent decades because they pose a serious threat to fisheries,coastal industries,tourism,and the marine *** life cycle of scyphozoan jellyfish consists of a pelagic medusa stage and a benthic polyp stage,where asexual reproduction and strobilation of the polyps directly affect the abundance of ephyra and subsequently medusa *** dynamics of polyps are affected by both environmental and biological factors,and predation by natural predators is one of the most important biological *** nomurai,Aurelia coerulea,and Rhopilema esculentum are three scyphozoan species that are commonly found in Chinese coastal waters,and previous studies reported that the survivorship of polyps differs among the three species when they are exposed to the same benthic *** identify potential natural predators of polyps of these three species in Chinese coastal waters and to determine whether the predation rates on polyps of the three species differ,we collected 39 species of macrozoobenthos from the Bohai Sea,Yellow Sea,and East China Sea from May 2014 to June 2016 and conducted predation tests and predation rate *** found that the nudibranchs Pleurobranchaea novaezealandiae,Okenia plana,and Chromodoris tinctoria and the sea anemones Paracalliactis sinica,Calliactis japonica,Anthopleura incerta,and Anthopleura midori could prey on the polyps of all three scyphozoan *** predation rates increased with the body length of the *** predations rates were also related to the polyp species,although the different predators showed no consistent preference for a particular species of *** results indicate that introducing predators to locations inhabited by polyps might be a way to control the benthic polyp populations and prevent subsequent jellyfish blooms.

关键词： jellyfish bloom polyps predation rate predators

Intraguild predation by polyps of three scyphozoan jellyfish:Nemopilema nomurai,Aurelia coerulea,and Rhopilema esculentum

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Journal of Oceanology and Limnology 2020年第6期38卷 1755-1761页

作者： TANG Changsheng sun song ZHANG Fang Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Sciences Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China

Jellyfish blooms occur worldwide and have resulted in serious problems in tourism,fisheries,coastal industries,and the marine *** life cycle of scyphozoan jellyfish consists of a pelagic medusa stage and a benthic polyp *** of asexual reproduction of the polyps determines directly the number of medusae;thus,the polyp stage is the key to understanding the population dynamics of *** nomurai,Aurelia coerulea,and Rhopilema esculentum are three scyphozoan jellyfish commonly inhabit in Chinese coastal *** of *** are easily visible,while those of *** and *** remain yet to be found in the ***,distribution of the medusa indicates that the polyps of all three species may occur *** evaluate the distribution pattern of polyps of the three species and explore intraguild predation by the polyps,we conducted a laboratory experiment that considered the attachment sequence and size relationship of calyx diameter of the *** found that the polyps of *** preyed on polyps of the other two species in all treatments,except when polyps of *** were bigger than those of *** polyps of *** preyed on the polyps of *** only when polyps of *** attached first and were bigger than those of *** of *** polyps were rarely found in the places inhabited by *** *** addition,*** polyps are known to inhabit at depths of less than 20 m in coastal sea,thus,we speculate that *** polyp colonies might occur at depths of more than 20 ***,our finding that polyps of *** aggressively preyed on polyps of other species may help understand other such systems of jellyfish bloom in the world.

关键词： jellyfish bloom polyps intraguild predation nature habitats

Complete mitochondrial genomes of two deep-sea pandalid shrimps,Heterocarpus ensifer and Bitias brevis:insights into the phylogenetic position of Pandalidae(Decapoda:Caridea)

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Journal of Oceanology and Limnology 2020年第3期38卷 816-825页

作者： sun Shao’e CHENG Jiao sun song SHA Zhongli Department of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China Deep Sea Research Center Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

The mitochondrial genome(mitogenome)analysis is a significant tool for investigating the evolutionary history of metazoan *** family Pandalidae is a diverse caridean group containing mainly deep-sea *** May 302019,only two complete mitogenomes are available in *** we present the complete mitogenome sequences of two deep-sea pandalid shrimps,Heterocarpus ensifer and Bitias brevis through Illumina *** mitochondrial genomes were determined to be 15939 bp and 15891 bp long,and both consist of 13 protein-coding genes(PCGs),23 transfer-RNA genes(tRNAs),two ribosomal-RNA genes(rRNAs),and one control *** nucleotide composition is biased toward adenine and ***,the gene contents and arrangements are consistent with the pancrustacean ground *** alignment of the control regions of four pandalids reveals a conserved sequence block(CSB)(104 bp in length,average GC%=29.47%and 69.23%similarity).A phylogenetic analysis based on 51 Caridea complete mitogenomes revealed that the deep-sea pandalid shrimps are situated an intermediate lineage,with a tendency to originated from those living in shallow sea area.

关键词： Pandalidae deep sea mitochondrial genome gene order phylogenetic relationships

Bacterial and cyanobacterial diversities determined by T-RFLP analyses in the Jiaozhou Bay

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Acta Oceanologica Sinica 2006年第4期25卷 113-123页

作者： REN Jing DANG Hongyue song Linsheng sun song AN Liguo College of Life Science Shandong Normal University Jinan 250014 China Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

The methods of DAPI staining epifluorescence microscopy and T-RFLP analysis were used to analyze the microbial abundance and diversity in surface seawater sampled from 12 stations inside and outside of the Jiaozhou Bay during a survey on 12 and 13 September 2004. The abundance of total microbes is in the range of 10^6～ 10^7 cells/cm^3, similar to those of most semi-enclosed bays in the temperate areas in the world. The highest microbial densities occur in the northeastern part of the Jiaozhou Bay, around the mouths of Loushan and Licun Rivers and the Hongdao aquacultural farming areas, suggesting that the degree and characteristics of pollutions, along with geographical and hydrological effects, may be important determinants affecting the abundance and distribution of bacteria in the Jiaozhou Bay. Bacterial communities inside and outside of the Jiaozhou Bay can be grouped into three classes based on T-RFLP patterns and cluster analyses. Stations at the water channel of the bay mouth and outside, such as D1, D3, D5, D6 and D7, are grouped together to stand for the outside bacterial community interacting with the environment outside of the Jiaozhou Bay. Stations of the innermost side of the Jiaozhou Bay, such as A3, A5, B2 and Y1, are grouped together to stand for the residential bacteria community. Stations C1, C3 and CA are grouped together and may stand for the transitional bacterial assemblage between the residential community and the outside community. However, there is no such a defined relationship for the case of cyanobacterial diversity, indicating the fact that cyanobacteria are more flexible and adaptable to all kinds of conditions.

关键词： bacterial diversity cyanobacteria 16S rDNA T-RFLP Jiaozhou Bay

Accelerated recruitment of copepod Calanus hyperboreus in pelagic slope waters of the western Arctic Ocean

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Acta Oceanologica Sinica 2018年第5期37卷 87-95页

作者： XU Zhiqiang ZHANG Guangtao sun song Jiaozhou Bay Marine Ecosystem Research Station Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

Shelf-basin advection is essential to subsistence of the Arctic copepod Calanus hyperboreus population in high basin area. Its abundance, population structure and body size in pelagic layer were investigated with samples collected over a large range in the western Arctic Ocean during summer 2003, to evaluate the geographical variation in recruitment pattern. Calanus hyperboreus was absent from the shallow areas of the Chukchi Sea and most abundant in the slope area between the Chukchi Sea and Chukchi Abyssal Plain（CS-slope）. Total abundance varied between 1 110.0 and 5 815.0 ind./m^2 in the CS-slope area and ranged from 40.0 to 950.0 ind./m^2 in the other areas. Early stages（CI–IV） dominated in the CS-slope area, whereas CV and adult females were frequently recorded only in deep basin areas. Geographical difference of prosome length was most evident in CIII,with average ranging from 2.48 to 2.61 mm at the CS-slope stations and 2.16–2.37 mm at the others. Abundance of early developmental stages（CI–CIV） correlated positively with Chl a concentration, but negative correlation was observed in late stages（CV–adult）. Our results indicated that C. hyperboreus can benefit from primary production increase through accelerated development in the first growth season and the productive CS-slope area is a potential source for slope-basin replenishment.

关键词： continental slope prosome length population structure food availability life cycle

A note on the collapsing geometry of hyperkahler four manifolds

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Science China Mathematics 2019年第11期62卷 2195-2210页

作者： Shouhei Honda song sun Ruobing Zhang Mathematical Institute Tohoku UniversitySendai 980-8578Japan Department of Mathematics University of California at BerkeleyBerkeleyCA 94720USA Department of Mathematics Stony Brook UniversityStony BrookNY 11790USA

We make some observations concerning the one-dimensional collapsing geometry of four-dimensional hyperk?hler metrics.

关键词： hyperkahler metrics collapsing K3 manifold