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| 1 | Evaluation of health benefit using Ben MAP-CE with an integrated scheme of model and monitor data during Guangzhou Asian Games显示文摘Guangzhou is the capital and largest city(land area:7287 km2)of Guangdong province in South China.The air quality in Guangzhou typically worsens in November due to unfavorable meteorological conditions for pollutant dispersion.During the Guangzhou Asian Games in November 2010,the Guangzhou government carried out a number of emission control measures that significantly improved the air quality.In this paper,we estimated the acute health outcome changes related to the air quality improvement during the 2010 Guangzhou Asian Games using a next-generation,fully-integrated assessment system for air quality and health benefits.This advanced system generates air quality data by fusing model and monitoring data instead of using monitoring data alone,which provides more reliable results.The air quality estimates retain the spatial distribution of model results while calibrating the value with observations.The results show that the mean PM_2.5concentration in November 2010 decreased by 3.5μg/m^3 compared to that in 2009 due to the emission control measures.From the analysis,we estimate that the air quality improvement avoided 106 premature deaths,1869 cases of hospital admission,and 20,026 cases of outpatient visits.The overall cost benefit of the improved air quality is estimated to be 165 million CNY,with the avoided premature death contributing 90%of this figure.The research demonstrates that Ben MAP-CE is capable of assessing the health and cost benefits of air pollution control for sound policy making. | Dian Ding Yun Zhu Carey Jang Che-Jen Lin Shuxiao Wang Joshua Fu Jian Gao Shuang Deng Junping Xie Xuezhen Qiu | 2016 | Journal of Environmental Sciences2016，28，4： | 13 |
| 2 | Design and demonstration of a next-generation air quality attainment assessment system for PM_(2.5)and O_3显示文摘Due to the increasingly stringent standards, it is important to assess whether the proposed emission reduction will result in ambient concentrations that meet the standards. The Software for Model Attainment Test—Community Edition(SMAT-CE) is developed for demonstrating attainment of air quality standards of O3 and PM2.5. SMAT-CE improves computational efficiency and provides a number of advanced visualization and analytical functionalities on an integrated GIS platform. SMAT-CE incorporates historical measurements of air quality parameters and simulated air pollutant concentrations under a number of emission inventory scenarios to project the level of compliance to air quality standards in a targeted future year. An application case study of the software based on the U.S. National Ambient Air Quality Standards(NAAQS) shows that SMAT-CE is capable of demonstrating the air quality attainment of annual PM2.5and 8-hour O3 for a proposed emission control policy. | Hua Wang Yun Zhu Carey Jang Che-Jen Lin Shuxiao Wang Joshua S.Fu Jian Gao Shuang Deng Junping Xie Dian Ding Xuezhen Qiu Shicheng Long | 2015 | Journal of Environmental Sciences2015，27，3： | 11 |
| 3 | Development and case study of a science-based software platform to support policy making on air quality显示文摘This article describes the development and implementations of a novel software platform that supports real-time, science-based policy making on air quality through a user-friendly interface. The software, RSM-VAT, uses a response surface modeling(RSM) methodology and serves as a visualization and analysis tool(VAT) for three-dimensional air quality data obtained by atmospheric models. The software features a number of powerful and intuitive data visualization functions for illustrating the complex nonlinear relationship between emission reductions and air quality benefits. The case study of contiguous U.S.demonstrates that the enhanced RSM-VAT is capable of reproducing the air quality model results with Normalized Mean Bias < 2% and assisting in air quality policy making in near real time. | Yun Zhu Yanwen Lao Carey Jang Chen-Jen Lin Jia Xing Shuxiao Wang Joshua S.Fu Shuang Deng Junping Xie Shicheng Long | 2015 | Journal of Environmental Sciences2015，27，1： | 10 |
| 4 | A case study of development and application of a streamlined control and response modeling system for PM_(2.5)attainment assessment in China显示文摘This article describes the development and application of a streamlined air control and response modeling system with a novel response surface modeling-linear coupled fitting method and a new module to provide streamlined model data for PM_(2.5) attainment assessment in China.This method is capable of significantly reducing the dimensions required to establish a response surface model,as well as capturing more realistic response of PM_(2.5) to emission changes with a limited number of model simulations.The newly developed module establishes a data link between the system and the Software for Model Attainment Test—Community Edition(SMAT-CE),and has the ability to rapidly provide model responses to emission control scenarios for SMAT-CE using a simple interface.The performance of this streamlined system is demonstrated through a case study of the Yangtze River Delta(YRD) in China.Our results show that this system is capable of reproducing the Community Multi-Scale Air Quality(CMAQ) model simulation results with maximum mean normalized error < 3.5%.It is also demonstrated that primary emissions make a major contribution to ambient levels of PM_(2.5) in January and August(e.g.,more than50%contributed by primary emissions in Shanghai),and Shanghai needs to have regional emission control both locally and in its neighboring provinces to meet China's annual PM_(2.5)National Ambient Air Quality Standard.The streamlined system provides a real-time control/response assessment to identify the contributions of major emission sources to ambient PM_(2.5)(and potentially O_3 as well) and streamline air quality data for SMAT-CE to perform attainment assessments. | Shicheng Long Yun Zhu Carey Jang Che-Jen Lin Shuxiao Wang Bin Zhao Jian Gao Shuang Deng Junping Xie Xuezhen Qiu | 2016 | Journal of Environmental Sciences2016，28，3： | 9 |
| 5 | Development of an integrated policy making tool for assessing air quality and human health benefits of air pollution control显示文摘有效空气质量管理是批评的保护公共健康免受空气污染的不利影响的伤害。为了评估空气污染的有效性,控制策略, US 环境保护机构(美国 EPA )开发了软件让模型成就测试社区编辑( SMAT-CE )估计排放减小的空气质量成就,并且印射的环境好处和编辑( BenMAP-CE )分别地空气质量改进有益于评估健康和经济的分析节目社区。后来科学的决策要求及时、协调的信息,开发在 SMAT-CE 之间的连接,进一个综合评价平台的 BenMAP-CE 是合乎需要的。探讨这需要,连接 SMAT-CE 到 BenMAP-CE 的一个新模块被开发了并且测试。新模块优化对优秀、人的健康为建议空气污染控制策略有益于的空气的评价。它也实现没有损害精确性,显著地提高计算效率的一个优化数据 gridding 算法。综合软件包裹的性能通过案例研究被表明评估质量和联系经济下午 2.5 的公民级的控制策略有益于的空气。案例研究的结果证明建议排放减小基于 US 国家周围的空气质量标准从 379 ~ 25 减少 nonattainment 地点的数字,从改进公共健康每年多于经济好处的 3340 亿美元导致。在这研究的基于科学的软件工具的集成提高为政策制造者开发有效、优化的排放控制策略的效率。 | Xuezhen QIU Yun ZHU Carey JANG Che-Jen LIN Shuxiao WANG Joshua FU Junping XIE Jiandong WANG Dian DING Shicheng LONG | 2015 | Frontiers of Environmental Science & Engineering2015，9，6： | 6 |
| 6 | Tenofovir disoproxil fumarate therapy in patients with chronic hepatitis B and advanced fibrosis or compensated cirrhosis显示文摘Background and aims:Tenofovir disoproxil fumarate(TDF)is the first-line therapy for chronic hepatitis B.This interim analysis presents the efficacy and safety data for TDF at Week 144 in patients with chronic hepatitis B and advanced fibrosis or compensated cirrhosis from China.Methods:Patients were assessed for incidence of newly diagnosed hepatocellular carcinoma(HCC)and disease progression,liver stiffness measurement(LSM),virological suppression(serum hepatitis B virus DNA<20 IU/mL),alanine aminotransferase normalization,hepatitis B e antigen(HBeAg)loss and seroconversion,histological liver fibrosis score,and safety at Week 144.Results:Overall,197 patients were enrolled.At Week 144,the incidence of newly diagnosed HCC was observed in 2.1%patients,and the incidence of disease progression was observed in 3.6%patients.The mean(standard deviation)change in LSM from baseline was5.1(5.85)kPa.Serum hepatitis B virus DNA<20 IU/mL was observed in 94.1%patients,alanine aminotransferase normalization in 33.5%patients,HBeAg loss in 35.6%patients,and HBeAg seroconversion in 14.4%patients.Among patients with stage F3 or F4 fibrosis at baseline by LSM,38.3%patients regressed to stage F0/1,and 22.0%of patients regressed to stage F2 at Week 144.Overall,67.7%patients experienced≥1 adverse events,13.8%patients experienced TDF-related adverse events,and 16.4%patients experienced serious(none were TDF-related).Conclusions:At Week 144 of TDF treatment,low incidence of HCC and disease progression were reported.Virological suppression was observed in 94.1%patients,which was associated with fibrosis regression.No new safety events were identified. | Huiying Rao Jia Shang Qing Xie Jianqi Lian Pujun Gao Junping Shi Xinyue Chen Jiefei Wang Min Xu Liaoyun Zhang Yingren Zhao QingMao Maorong Wang Wei Zhao Zong Zhang Jidong Jia Hong Tang Jiming Zhang Xin Zheng Chang Liu Lai Wei | 2022 | iLIVER2022，1，3： | 1 |
| 7 | Phylogenetic, evolutionary, and biogeographic origin of the genus Sheathia (Batrachospermales, Rhodophyta)显示文摘The genus Sheathia consists of over 20 species primarily distributed in Asia,Europe,Oceania,North America,and Africa.However,the origin and evolution of this genus remain unclear.Two gametophyte stage specimens(SAS18052 and SAS18523)and two“Chantransia”stage specimens(YTS19161 and YTS19017)were collected from Shanxi and Henan Provinces in China,respectively.Based on morphological data,isolates YTS19161 and YTS19017 were similar to Audouinella pygmaea,whereas the morphological characteristics of SAS18052 and SAS18523 were in good agreement with the circumscription description of S.longipedicellata.Molecular sequences of rbc L,COI-5P,and psb A were used to investigate the phylogenetic,evolutionary,and biogeographic origin of the genus Sheathia.The three molecular markers supported that the two gametophyte stage specimens belong to S.longipedicellata,while the isolates YTS19161 and YTS19017 were the“Chantransia”of S.longipedicellata.Ancestral area reconstruction and divergence time estimation speculated that Sheathia originated in North America,a portion of the Pangaea at approximately 328.07-184.73 million years ago(Ma).Our relaxed molecular clock analysis suggests that the Florideophyceae diverged approximately 741.04(894.36-631.70)Ma.The major divergences in this class involved the emergence of Nemaliophycidae[ca.662.01(779.83-580.51)Ma],and the split of orders Batrachospermales and Thoreales[ca.456.10(552.80-367.88)Ma]. | Jinfen HAN Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2022 | Journal of Oceanology and Limnology2022，40，2： | 1 |
| 8 | Transcriptome profile of Dunaliella salina in Yuncheng Salt Lake reveals salt-stress-related genes under diff erent salinity stresses显示文摘Salt stress is an abiotic stress to plants in especially saline lakes.Dunaliella,a halophilic microalga distributed throughout salt lakes and seas,can respond to different salinity stresses by regulating the expression of some genes.However,these genes and their function and biological processes involved remain unclear.Profi ling these salt-stress-related genes in a high-salt-tolerant Dunaliella species will help clarify the salt tolerance machinery of Dunaliella.Three D.salina_YC salt-stress groups were tested under low(0.51 mol/L),moderate(1.03 mol/L),and high(3.42 mol/L)NaCl concentrations and one control group under very low(0.05 mol/L)NaCl concentration and 3 transcriptome results that were deep sequenced and de novo assembled were obtained per group.Twelve high-quality RNA-seq libraries with 46585 upregulated and 47805 downregulated unigenes were found.Relative to the control,188 common differentially expressed genes(DEGs)were screened and divided into four clusters in expression pattern.Fifteen of them annotated in the significant enriched Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)were validated via qPCR.Their qPCR-based relative expression patterns were similar to their RNA-seq-based patterns.Two significant DEGs,the geranylgeranyl diphosphate synthase coding gene(1876-bp cDNA)and diacylglycerol O-acyltransferase coding gene(2968-bp cDNA),were cloned and analyzed in silico.The total lipid content,superoxide dismutase specific activity,and betacarotene content of D.salina_YC increased gradually with increasing salinity.In addition,the expression of 11 validated genes involved in fatty acid biosynthesis/degradation,active oxygen or carotenoid metabolisms showed significant changes.In addition,algal photochemical efficiency was diminished with increasing salinity,as well as the expression of 4 photosynthesis-related genes.These results could help clarify the molecular mechanisms underlying D.salina responses to the Yuncheng Salt Lake environment and lay a foundation for further utilization of this algal resource. | Fan GAO Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2021 | Journal of Oceanology and Limnology2021，39，6： | 1 |
| 9 | Randomized, three‐arm study to optimize lamivudine efficacy in hepatitis B e antigen‐positive chronic hepatitis B patients显示文摘 | Xieer Liang Jun Cheng Yongtao Sun Xinyue Chen Tong Li Hao Wang Jianning Jiang Xiaoping Chen Hui Long Hong Tang Yanyan Yu Jifang Sheng Shijun Chen Junqi Niu Hong Ren Junping Shi Xiaoguang Dou Mobin Wan Jiaji Jiang Qing Xie Guangfeng Shi Qin Ning Chengwei C | 2015 | J Gastroenterol Hepatol2015，，4： | 1 |
| 10 | Affinities offreshwater“Chantransia”stage algae(Rhodophyta)from China based on molecular and morphological analyses显示文摘Twelve putative'Chantransia'isolates were collected from six locations across Hubei,Shanxi,Guizhou,and Henan Provinces in China.Their morphological characters were evaluated via the Ward’s method of hierarchical cluster analysis in SPSS software to classify phylogenetic relationships among the isolates.The morphological data revealed that isolate HN31(called group'MALL')was distinct from the other specimens being macroscopic with large vegetative cells and monosporangia(>20μm in diameter).The 11 other isolates were grouped into three clusters,corresponding to the species Audouinella tenella,A.hermannii,and A.pygmaea.The morphological'Chantransia'stage of the species,reportedly belonging to the orders Batrachospermales,Thoreales,and the phylogenetically distant genus Audouinella,are very similar,resulting in the di fficulty to distinguish them based just on morphology.Therefore,molecular analysis of rbc L,UPA,and COI-5 P was conducted to infer the phylogenetic position of all isolates in this study.All'A.tenella'and'A.hermannii'sequences belong to order Batrachospermales,while the isolate HN31 was the'Chantransia'of Thorea hispida.The six other specimens varied morphologically,but they were within the circumscription of'A.pygmaea'.All three molecular markers show that all'pygmaea'isolates also represent the'Chantransia'of T.hispida.Furthermore,results from this investigation proposed a new species—Sheathia qinyuanensis,corresponding to the isolates QY1 and QY2. | Jinfen HAN Fangru NAN Jia FENG Junping LV Qi LIU Xudong LIU Shulian XIE | 2021 | Journal of Oceanology and Limnology2021，39，3： | 1 |
| 11 | Identification of novel salt stress-responsive microRNAs through sequencing and bioinformatic analysis in a unique halophilic Dunaliella salina strain显示文摘Dunaliella salina is a classic halophilic alga.However,its molecular mechanisms in response to high salinity at the post transcriptional level remain unknown.A unique halophilic alga strain,DS-CN1,was screened from four D.salina strains via cell biological,physiological,and biochemical methods.High-throughput sequencing of small RNAs(sRNAs)of DS-CN1 in culture medium containing 3.42-mol/L NaCl(SS group)or 0.05-mol/L NaCl(CO group)was performed on the BGISEQ-500 platform.The annotation and sequences of D.salina sRNAs were profiled.Altogether,44 novel salt stress-responsive microRNAs(miRNAs)with a relatively high C content,with the majority of them being 24 nt in length,were identified and characterized in DS-CN1.Twenty-one differentially expressed miRNAs(DEMs)in SS and CO were screened via bioinformatic analysis.A total of 319 putative salt stress-related genes targeted(104 overlapping genes)by novel miRNAs in this alga were screened based on our previous transcriptome sequencing research.Furthermore,these target genes were classified and enriched by GO and KEGG pathway analysis.Moreover,5 novel DEMs(dsa-mir3,dsa-mir16,dsa-mir17,and dsa-mir26 were significantly upregulated,and dsa-mir40 was significantly downregulated)and their corresponding 10 target genes involved in the 6 significantly enriched metabolic pathways were verified by quantitative real-time PCR.Next,their regulatory relationships were comprehensively analyzed.Lastly,a unique salt stress response metabolic network was constructed based on the novel DEM-target gene pairs.Taken together,our results suggest that 44 novel salt stress-responsive microRNAs were identified,and 4 of them might play important roles in D.salina upon salinity stress and contribute to clarify its distinctive halophilic feature.Our study will shed light on the regulatory mechanisms of salt stress responses. | Fan GAO Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2023 | Journal of Oceanology and Limnology2023，41，4： | 0 |
| 12 | Phylogeny and Geographical Derivation of Genus Hildenbrandia Based on Morphological and Molecular Evidence显示文摘The marine and freshwater Hildenbrandia samples were collected from diverse locations of China and Japan,and mor-phological characterization and molecular phylogenetic analysis were conducted on these samples.Morphological measurements of freshwater specimens were consistent with the results of H.jigongshanensis,whereas cell dimensions of marine specimens were slightly larger than those of widely distributed H.rubra and H.crouanii.Phylogenetic trees based on rbcL,psbA and UPA sequences were consistent.Freshwater specimens collected in this study formed an independent clade with H.jigongshanensis supported by high values.Species attribution was confirmed further by the similar ITS2 secondary structures among the samples of H.jigongshan-ensis.It was found that the intraspecific divergence of rbcL gene in H.jigongshanensis was smaller than other two freshwater species H.rivularis and H.angolensis.Phylogenetic trees showed that marine specimens in this study grouped together with H.rubra samples of North America,and were different with the H.rubra samples of Europe.Combining the comparison results of CBC numbers in ITS2 secondary structure,we propose the marine samples collected in this study to be a new species Hildenbrandia qingdaoensis sp.nov.The separation of the marine and freshwater specimens was supported by the rbcL,UPA and psbA phylogeny as well as ITS2 se-condary structure inference.Biogeographical reconstruction showed the ancestor of freshwater Hildenbrandia might derive from South America and dispersed from North America to Europe and then to Asian countries,which needs to be verified further with more sam-ples and molecular evidences from South America. | NAN Fangru ZHAO Huiying LI Juan LIU Xudong LIU Qi LV Junping FENG Jia XIE Shulian | 2023 | Journal of Ocean University of China2023，22，6： | 0 |
| 13 | Virescentia guangxiensis(Batrachospermales,Rhodophyta):a new freshwater red algal species from South China显示文摘Virescentia guangxiensis,a new species of Virescentia from Guangxi,South China,is described and illustrated based on morphological observations and phylogenetic analysis.This species was distinguished morphologically from other species by the presence of special expansion cells with a variable shape,obovoid,spherical,pear-shaped,located in the penultimate cells of primary or secondary fascicles,rarely terminal on primary fascicles,as well as by small whorls(250-350-μm wide)and short primary fascicles(5-7 cell stories).Phylogenetic analysis of molecular data from the rbc L and COI-5P loci supported the separation of the proposed new species from other species in the genus Virescentia.This is the first species of the order Batrachospermales reported in Guangxi and the second species of the genus Virescentia reported in China.This study expands the known species diversity and geographical distribution of freshwater Rhodophyta in China. | Kunpeng FANG Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2021 | Journal of Oceanology and Limnology2021，39，4： | 0 |
| 14 | Seasonal co-occurrence patterns of bacteria and eukaryotic phytoplankton and the ecological response in urban aquatic ecosystem显示文摘Microorganisms play a key role in aquatic ecosystems.Recent studies show that keystone taxa in microbial community could change the community structure and function.However,most previous studies focus on abundant taxa but neglected low abundant ones.To clarify the seasonal variation of bacterial and microalgal communities and understand their synergistic adaptation to diff erent environmental factors,we studied the bacterial and eukaryotic phytoplankton communities in Fenhe River that runs through Taiyuan City,central China,and their seasonal co-occurrence patterns using 16S and 18S rDNA sequencing.Results indicate that positive interaction of eukaryotic phytoplankton network was more active than negative one except winter,indicating that the cooperation(symbiotic phenomenon in which phytoplankton are interdependent and mutually benefi cial)among them could improve the adaption of microbial community to the local environmental changes and maintain the stability of microbial network.The main genera that identifi ed as keystone taxa in bacterial network were Salinivibrio and Sphingopyxis of Proteobacteria and they could respond to the variation of nitrite and make use of it,while those that identifi ed as keystone taxa in eukaryotic phytoplankton network were Pseudoschroederia and Nannochloris,and they were more susceptible to nitrate and phosphate.Mychonastes and Cryptomonas were closely related to water temperature.However,the loss of the co-occurrence by environmental factor changes aff ected the stability of network structure.This study provided a reference for analyzing relationship between bacteria and eukaryotic phytoplankton and revealing potential importance of keystone taxa in similar ecological domains in carbon,nitrogen,and phosphorus dynamics. | Jing YANG Xiongjie ZHANG Junping LÜ Qi LIU Fangru NAN Xudong LIU Shulian XIE Jia FENG | 2022 | Journal of Oceanology and Limnology2022，40，4： | 0 |
| 15 | Transcriptome analysis of Porphyridium purpureum under salinities of 0 and 68显示文摘The most prominent biological characteristic of Porphyridium purpureum is their unique extracellular sulfated polysaccharides that plays an important protective role against salt stress.Adaptation to stress is associated with metabolic adjustments.However,the molecular mechanisms underlying such metabolic changes remain elusive.This study presents the fi rst transcriptome profi ling of P.purpureum.A total of 8019 assembled transcripts were identifi ed,annotated,and classifi ed into diff erent biological categories and pathways based on a BLAST analysis against various databases.The in-depth analysis revealed that many of the diff erentially expressed genes in P.purpureum under salinities of 68 and 0 involved polysaccharide metabolism.A comparison of the gene expression levels under diff erent salinities revealed that the polysaccharide synthetic pathway was signifi cantly upregulated under the 68 salinity condition.The increased expression of the FBP,pfkA,CS,pgm,USP,UGP2,galE,and MPI transcripts in the polysaccharide synthetic pathway and the increase in ATP2 and ATP6 transcripts in the energy metabolic pathway revealed the molecular mechanism of high-salt adaptation.This sequencing dataset and analysis could serve as a valuable resource to study the mechanisms involved in abiotic stress tolerance in Rhodophyta. | Xudan LU Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2022 | Journal of Oceanology and Limnology2022，40，4： | 0 |
| 16 | Effects of phytoplankton community and interaction between environmental variables on nitrogen uptake and transformations in an urban river显示文摘Phytoplankton are not only the main bearer of the nitrogen cycle,but also a key link driving nitrogen cycle.However,most phytoplankton cannot directly use N_(2),and they must uptake nitrogenous nutrients(ammonium,nitrate,and urea)to meet their photosynthesis needs.We examined the uptake characteristics of several nitrogenous substrates using stable isotope technique and identifi ed the potential nitrogen transformations in the Fenhe River.Results revealed that spring phytoplankton community composed of mainly Fragilaria,Ulothrix,Microcystis,and Synedra.Urea can meet the spring partial nitrogen requirement of phytoplankton.The large uptake rate of urea depended on urease,chlorophyll a,and nitrate concentrations as shown in random forest models.Cyanobacteria explained more than 42.8%of the total abundance at all sites in summer.Upstream was dominated by Actinastrum,and Chlorella was relevant in the downstream section.The uptake rates of ammonium were higher than those of nitrate and urea.In addition,the random forest model demonstrated that ammonium,urease,and dissolved oxygen(DO)were the major contributors to the ammonium uptake rates.Ammonium was taken up preferentially in autumn and phytoplankton(Cyclotella,Chlorella,and Pseudanabaena)appeared to be able to respond to changes in nitrogen forms by adjusting their community composition.Structural equation models demonstrated that temperature-induced changes in DO directly affected the transformations of different forms of nitrogen.At the same time,dissolved organic carbon can directly act on nutrients and then indirectly affect enzyme activity.There were great diff erences in the positive and negative effects of different paths in the process of nitrate reduction to nitrite and then reduction to ammonium in time and space.These findings provide a better understanding of the underlying mechanism of nitrogen uptake and the influences of interaction between environmental variables on nitrogen transformations in urban river ecosystems. | Jing YANG Haiguang PEI Junping LÜ Qi LIU Fangru NAN Xudong LIU Shulian XIE Jia FENG | 2022 | Journal of Oceanology and Limnology2022，40，3： | 0 |
| 17 | Pauciramus yunnanensis,gen.et sp.nov.,a novel freshwater red alga from China with proposal of the Ottiales ord.nov.(Nemaliophycidae,Rhodophyta)显示文摘Species of the red algal order Acrochaetiales mostly inhabit marine environments,with only two freshwater taxa Audouinella and Ottia.A new genus and species are described for freshwater red alga Pauciramus yunnanensis from Ailao Mountain,Yunnan,China.It is closely related to Ottia and a new order Ottiales was proposed for these genera.Pauciramus has unique combination of morphological characteristics including the following:plants caespitose and densely pulvinate,slender uniseriate filaments with well-developed rhizoids,rarely branched,cylindrical vegetative cell with a single,ribbon-shaped and parietal chloroplast,reproduction by tetrasporangia,and dense sporangial branchlet only at the upper portion of filaments.Phylogenetic analysis of sequence data from the plastid ribulose-1,5-bisphosphate carboxylase-oxygenase large-subunit(rbc L),small subunit gene of the ribosomal cistron(SSU)and barcode region near the 5′end of the mitochondrial cytochrome oxidase subunit I(COI-5P)indicated that:the new taxon,P.yunnanensis,was in a well-supported clade with Ottia meiospora,and this clade was sister to order Palmariales and Acrochaetiales.To adhere to the principle of monophyly,a new freshwater order Ottiales including Ottia and Pauciramus is proposed.Despite the high sequence interspecific divergences and obvious morphological differences between genera Ottia and Pauciramus,seems impractical to establish a new family for a monospecific genus.Therefore,we temporarily classified Pauciramus into the family Ottiaceae,and made necessary revisions to the description to accommodate this genus. | Kunpeng FANG Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2022 | Journal of Oceanology and Limnology2022，40，3： | 0 |
| 18 | Gomphonema Ehrenberg species from the Yuntai Mountains,Henan Province,China显示文摘We report on eight species of the freshwater diatom genus Gomphonema from aquatic habitats from the Yuntai Mountains of Henan Province,China.This work represents the first detailed descriptions of the freshwater diatoms from this centrally-located province in China.Of the eight taxa considered,five are new to science and another is given a'cf.'designation.Four of the eight species are similar in morphological features to other,'classical'species,with external areolar occlusions forming C-shaped openings.Another species is astigmate,and has distinct siliceous papillae located marginally on the exterior of the valves;this morphology has not been recognized previously for the genus.Two of the species have internal areolar and stigma occlusions.The diversity of morphological types of species in Gomphonema may relate to the ecosystems,with more diverse ecosystems harboring greater diversity of these morphological groups of Gomphonema. | Qi LIU Nini CUI Jia FENG Junping LÜ Fangru NAN Xudong LIU Shulian XIE John Patrick KOCIOLEK | 2021 | Journal of Oceanology and Limnology2021，39，3： | 0 |
| 19 | Geographical distribution of Batrachospermaceae genera in Asia and its environmental factors显示文摘Batrachospermaceae is an important group of freshwater red algae.Available data of the latitude,longitude,and environmental factors on Batrachospermaceae distribution in Asia were analyzed to understand the geographical distribution of Batrachospermaceae genera in Asia.Statistical analyses,including one-way ANOVA,correlation analysis,stepwise regression analysis,principal component analysis,and linear discriminant analysis were conducted to characterize variation in geographical distribution and growth environment.Results reveal high variation in geographical distribution and growth environment among different Batrachospermaceae genera in Asia.Specifically,correlations between latitude and all environmental factors exclusive of altitude are significant,and longitude is significantly correlated with all environmental factors except for average relative humidity.The geographical distribution and growth environment of different Batrachospermaceae genera significantly differed.Altitude,maximum temperature,average temperature,minimum temperature,average relative humidity,average wind speed,maximum wind speed,and atmospheric pressure all contributed to explaining differences in the geographical distribution of Batrachospermaceae genera.Combining the results of correlation analysis,stepwise regression analysis,and principal component analysis,all environmental factors contributed to the different geographical distribution of Batrachospermum,Paludicola,Sheathia,Sirodotia,and Remainder(the rest),all environmental factors but atmospheric pressure contributed to the different geographical distribution of Kumanoa,and all environmental factors but average wind speed and maximum wind speed contributed to the different geographical distribution of Virescentia.However,the correlation between these significantly related environmental factors and taxa is not necessarily causative,and many other environmental factors,such as temperature,pH,conductivity,shading,current velocity,dissolved oxygen,hardness,substrata types,and nutrients etc.,are likely to have an important impact on the geographical distribution of taxa,which is an important topic for future research. | Mingyu QIU Fei WANG Fangru NAN Jia FENG Junping LÜ Qi LIU Xudong LIU Shulian XIE | 2023 | Journal of Oceanology and Limnology2023，41，3： | 0 |
| 20 | Comparison and phylogeny on mitochondrial genome of marine and freshwater taxa of genus Hildenbrandia(Florideophyceae,Rhodophyta)显示文摘Hildenbrandia is an early diverged lineage in Florideophyceae,Rhodophyta.The species diversity of this genus is still unresolved due to the simple morphology and limited molecular information.The mitochondrial genome of freshwater H.jigongshanensis was determined in this study.The freshwater H.jigongshanensis had a larger mitochondrial genome than the marine H.rubra and GC content was higher.Collinear alignment structure was observed between the mitochondrial genomes of H.jigongshanensis and H.rubra,except for one block that was encoded on the complement strand.More introns were found in mitochondrial genome of H.jigongshanensis than in H.rubra,and H.jigongshanensis shares the common feature with Bangiophyceae that two introns were distributed in cox1.Comparison of mitochondrial genome organization suggests that H.jigongshanensis preserves characters that could be hypothetically more similar to the ancestor of Bangiophyceae and Florideophyceae,which differ with previous studies based on chloroplast,and nuclear markers.More mitochondrial genomes and phylogenetic analyses combing nuclear,chloroplast and mitochondrial genomes are needed to clarify this discrepancy.Mitochondrion-based phylogeny in this study resulted in better solution at both the deep and recent derived nodes than single-gene phylogenies.Most protein-coding genes between H.jigongshanensis and H.rubra were identical except atp8,which was present in H.jigongshanensis while absent from H.rubra.This finding follows the trend that high Ka/Ks ratio genes are more frequently lost than low Ka/Ks ratio ones in red algae. | Fangru NAN Juan LI Jia FENG Junping Lü Qi LIU Xudong LIU Shulian XIE | 2023 | Journal of Oceanology and Limnology2023，41，6： | 0 |
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