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Spatiotemporal Distributions of Bacterioplankton Communities in the Qiantang River(Hangzhou Section),China

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Journal of Ocean University of China 2024年第4期23卷 1102-1114页

作者： XU Jiaojiao ZHAO Li LUKWAMBE betina NICHOLAUS Regan ZHU Jinyong YANG Wen ZHENG Zhongming School of Marine Sciences Ningbo UniversityNingbo 315211China School of Aquatic Sciences and Fisheries Technology University of Dar es SalaamDar es SalaamTanzania Department of Natural Sciences Mbeya University of Science and TechnologyMbeyaTanzania

The spatial and temporal distribution of bacterioplankton communities plays a vital role in understanding the ecological dynamics and health of aquatic *** this study,we conducted a comprehensive investigation of the bacterioplankton communities in the Qiantang River(Hangzhou section).Water samples were collected quarterly from seven sites over a one-year *** and chemical parameters,including dissolved oxygen(DO),water temperature(WT),chemical oxygen demand(COD),nitrite(NO_(2)^(-)),active phosphate(PO_(4)^(3-))and other indices were *** this study,theαdiversity,βdiversity and abundance differences of bacterial communities were investigated using 16S rRNA high-throughput sequencing *** spatial and temporal distribution characteristics and main driving factors of the bacterioplankton community structure and diversity were *** results showed that a total of 57 phyla were detected in the bacterioplankton community,among which Proteobacteria and Actinomycetes were the two dominant groups with the highest relative *** results of PCoA based on Bray-Curtis distance showed that the sampling season had a slightly greater effect on the changes in bacterioplankton community structure in the Qiantang *** and partial Mantel test showed that environmental variables(Mantel r=0.6739,P<0.0001;partial Mantel r=0.507,P=0.0001)were more important than geographical distance(Mantel r=0.5322,P<0.001;partial Mantel r=0.1563,P=0.001).The distance attenuation model showed that there was significant distance attenuation in all four seasons,and the maximum limit of bacterial community diffusion was found in *** analysis showed that nine environmental factors,including COD,WT and DO,significantly affected community distribution(P<0.05).This study provides valuable insights into the spatial and temporal distribution characteristics of bacterioplankton communities,shedding light on their ecological roles in the Qiantang R

关键词： Qiantang River bacterioplankton community spatial and temporal distribution 16S rRNA range attenuation

Spatial-temporal dynamics of bacterioplankton communities in the breeding area of large yellow croaker Larimichthys crocea in Sansha Bay,China

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Journal of Oceanology and Limnology 2023年第4期41卷 1481-1492页

作者： Shizhan ZHENG Shouheng ZHOU Wen YANG betina LUKWAMBE Regan NICHOLAUS Jinyong ZHU Zhongming ZHENG School of Marine Sciences Ningbo UniversityNingbo 315211China Key Laboratory of Marine Bioengineering of Zhejiang Province Ningbo UniversityNingbo 315211China School of Aquatic Sciences and Fisheries Technology University of Dares SalaamDares Salaam 999132Tanzania Department of Natural Sciences Mbeya University of Science and TechnologyMbeya 53119Tanzania

As an important spawning ground for large yellow croaker Larimichthys crocea,Sansha Bay,South China Sea has been a research ***,studies on the influence of the bacterioplankton community and assessments of its seasonal succession of bacterioplankton in different sea areas in Sansha Bay are still *** address the issue,we use 16S rRNA gene amplicon sequencing and functional prediction to investigate the spatial-temporal dynamics of the bacterioplankton community in three distinct areas,i.e.,Breeding Area(BA),Yantian Harbor(YH),and Bay Margin(BM)of Sansha *** show that the structure of the bacterioplankton community in Sansha Bay had a significant seasonal ***,the representative zero-radius Operation Taxon Units in different seasons were significantly different among the three selected sea ***,during the breeding season,bacterioplankton communities in BA were characterized by compound-degrading bacteria,such as Rhodococcus and Owenweeksia,while in YH and BM,animal parasites or symbionts such as Vibrio and Arcobacter were ***,the redundancy analysis and Spearman correlation analysis further explained that water temperature,dissolved oxygen,and ammonia nitrogen were the main environmental factors responsible for the *** addition,the bioindicator functions screened by Functional Annotation of Prokaryotic Taxa and random forest machine learning mainly relied on compound degradation,nitrite oxidation,and *** compound-degradationcorresponded bacterioplankton genera such as Rhodococcus had relatively higher abundance in BM,while Nitrospina corresponding to nitrite oxidation tended to be abundant in YH and *** on the spatial and temporal variation in the composition and function of bacterioplankton,our findings provide a basis for understanding the theory of bacterioplankton community structure in the inner-bay habitat of the large yellow croaker in Sansha Bay.

关键词： microbial ecology bacterioplankton large yellow croaker breeding area functional prediction

Dynamics of the Eukaryotic Microbial Community at the Breeding Sites of the Large Yellow Croaker Pseudosciaena crocea in the Southern East China Sea

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Journal of Ocean University of China 2022年第3期21卷 789-800页

作者： ZHOU Shouheng ZHENG Shizhan LV Tianying YANG Wen LUKWAMBE betina NICHOLAUS Regan LI Chenghua ZHENG Zhongming School of Marine Sciences Ningbo UniversityNingbo315211China Department of Aquculture Technology School of Aquatic Sciences and Fisheries TechnologyUniversity of Dar es SalaamDar es Salaam999132Tanzania Department of Natural Sciences Mbeya University of Science and TechnologyMbeya999068Tanzania

Clarifying eukaryotic microbial spatial distribution patterns and their determinants is an important idea in ecological ***,information on the distribution patterns of eukaryotic microbial community structures(EMCSs)within oceans remains *** this study,surface water samples from the southern East China Sea(SECS)were collected to investigate the spatiotemporal variation in EMCSs by using 18S rRNA high-throughput sequencing technology and the impact of this variation on Pseudosciaena crocea during the breeding *** results indicated that the distribution patterns of the eukaryotic microbial community structure were different among the Sansha Bay,Mindong and Wentai reserves and the offshore East China *** addition,there were notable potential effects of EMCSs on fishery *** variation partitioning analysis showed the environmental and spatial factors caused 53.4%of the variation in the EMCSs,indicating that spatially structured environmental factors were the key determinants of the EMCSs spatial heterogeneity in the SECS and may have contributed to the general distribution of *** addition,all the environmental factors were the main factors driving the distribution of eukaryotic microbes except for total ***,it was noted some phytoplankton such as Poterioochromonas and Rhizophydium of fungi in Sansha Bay can effectively prevent Cyanobacteria *** are natural high-quality baits for juvenile fish distributed in Sansha Bay,Mindong and Wentai *** study provides a part of the insight into potential eukaryotic community distributions in large water bodies and how they are affected by environmental factors.

关键词： southern East China Sea 18S rRNA gene sequencing variation partitioning analysis eukaryotic microbes

Arrested development? Investigating the role of bamboo in Araucaria Forest succession in Southern Brazil

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Journal of Plant Ecology 2019年第6期12卷 1034-1046页

作者： betina Kellermann AndréEduardo Biscaia Lacerda EMBRAPA Forestry Brazilian Agriculture Research CorporationEstrada da Ribeirakm 111Caixa Postal 319Colombo 83411-000PRBrazil

Aims Assessing the role of a dominant native bamboo species on tree species diversity and structure in the medium *** Over a 7-year period,we studied the natural regeneration of two dominant forest types in Southern Brazil(Araucaria Forest or AF;Bamboo Forest or BF)after a bamboo(Merostachys skvortzovii Send.)die-off between 2004 and *** study was carried out in the Embrapa Research Station in Cacador,Santa Catarina State,*** Findings The die-off provided ideal conditions for the establishment of several species and it kickstarted forest succession dynamics,which in turn affected regeneration *** species richness was relatively stable with a transitory increase between 2007 and 2014 in both AF and ***,species richness rose in BF because of a relative increase in abundance of some species(especially late and secondary species)while a plunge in some pioneer species drove an increase in ***,we found that BF has a lower diversity of recruits and that density declined over time,while AF is more diverse,with a more stable *** BF,the bamboo die-off created optimal conditions for initial regeneration development(mainly fast-growing pioneer trees),which quickly transited to higher size ***,after this initial stage of pioneer recruitment,the number of recruits dropped followed by a virtual absence of growth regardless of the species group as a result of a quick bamboo *** bamboo recreated a dense understory it reduced species diversity to original levels,suggesting a self-maintaining cycle that halts forest *** the other hand,the bamboo die-off had little impact on AF where a slow recruitment process typical of old-growth forests was *** results indicate that the die-off event had a temporary effect on species diversity *** to forests where bamboos are dominant in a similar process described in other southern South American *** the first study to obser

关键词： dominant species Merostachys skvortzovii Send. forest succession biodiversity forest regeneration

In situ Assemblies of Bacteria and Nutrient Dynamics in Response to an Ecosystem Engineer,Marine Clam Scapharca subcrenata,in the Sediment of an Aquaculture Bioremediation System

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Journal of Ocean University of China 2020年第6期19卷 1447-1460页

作者： NICHOLAUS Regan LUKWAMBE betina YANG Wen ZHU Jinyong ZHENG Zhongming School of Marine Sciences Ningbo UniversityNingbo 315832China Department of Natural Sciences Mbeya University of Science and TechnologyMbeya 53000Tanzania Department of Food Science and Technology University of Dar es SalaamDar es Salaam 35091Tanzania

The relationships between nutrient dynamics,microbial community,and macrofauna are important in bioremediation *** this study,we examined the effects of marine clam Scapharca subcrenata sedimentary activities on the microbial assemblages,benthic nutrient chemistry,and its subsequent remediation impacts on organic effluent in the sediment of an aquaculture wastewater bioremediation *** results showed that microbial community composition differed significantly in the clam area(ANOSIM,R=0.707,P=0.037).Pyrosequencing of bacterial 16S rRNA gene revealed a total of 48 unique phyla,79 classes,107 orders,197 families,and 321 genera amongst all *** most dominant bacterial assemblages were Proteobacteria,Bacteroidetes,Acidobacteria,Firmicutes,Verrucomicrobia,and Actinobacteria,with Bacteroidetes and Firmicutes significantly higher in all treatment samples than control(P<0.001).All dominant phyla in the list were shared across all samples and accounted for 89%(control)and 97%(treatment)of the total 16S *** nutrient flux rates from the sediments into the water(treatment group)were 51%(ammonium),88%(nitrate),77%(nitrite)and 45%(phosphate)higher,relative to the control implying increased mineralization,degradability,and mobility of the benthic ***,significantly increased oxygen consumption rates were evident in the clam area signifying improved oxygen distribution within the *** organic effluent contents associated with total-organic matter,carbon,nitrogen,and,phosphate were lower among the clam treatments relative to the *** results describe the potential roles and mechanisms contributed by marine bivalve *** on benthic-bacterial-community assembly,nutrient balance,and effluent reduction in the sediments of aquaculture wastewaters bioremediation system.

关键词： Scapharca subcrenata effluents bioturbation:sediment chemistry bioremediation nutrient dynamics

Is there a role for liver transplantation in the treatment of hepatocellular carcinoma in non-cirrhotic liver?

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World Journal of Meta-Analysis 2022年第2期10卷 46-51页

作者： Luis Cesar Bredt Ingryd betina Garcia Felisberto Doroty Eva Garcia Felisberto Surgical Oncology and Hepatobiliary Surgery Unioeste UniversityCascavel 85819-110ParanáBrazil Internal Medicine Univates UniversityLajeado 95914-014Rio Grande do SulBrazil Department of Surgery Nossa Senhora das Graças HospitalCuritiba 80810-040ParanáBrazil

Whether liver transplantation(LT)plays a role in the treatment of patients with hepatocellular carcinoma(HCC)in non-cirrhotic liver(NCL)is a matter of *** recommendations for LT in this setting are extremely fragile and less welldefined than for cirrhosis-associated *** reports of LT for NCL-HCC revealed that long-term outcomes of these patients are poor,and these dismal figures are justified by the advanced tumor stage at the time of LT,suggesting the presence of systemic micrometastatic *** decision-making regarding LT for NCL-HCC is difficult,since specific selection criteria are scarce,and basically the potential candidates are those with unresectable only-liver tumor at admission,or unresectable intrahepatic recurrence *** the surgical aspects regarding the tumor resectability,other phenotypic and genetic characteristics of the tumor should be considered for the indication of LT in this *** present minireview aims to discuss and analyze the last series of LT for NCL-HCC,in order to help clinicians in the decision-making process regarding the role of LT in NCL-HCC treatment.

关键词： Liver transplantation Non-cirrhotic liver Liver Cancer Hepatocellular carcinoma Treatment

Eukaryotic microbial distribution pattern and its potential effects on fisheries in the fish reserves of Qiantang River in breeding season

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Journal of Oceanology and Limnology 2021年第2期39卷 566-581页

作者： Hang LAI Li ZHAO Wen YANG Regan NICHOLAUS betina LUKWAMBE Jinyong ZHU Zhongming ZHENG School of Marine Sciences Ningbo UniversityNingbo 315211China Department of Natural Sciences Mbeya University of Science and TechnologyMbeya 53000Tanzania Department of Food Science and Technology University of Dar es SalaamDar es Salaam 11000Tanzania

To examine the eukaryotic biodiversity of aquatic ecosystems in the Qiantang River,China,eukaryotic microbes in the river were investigated using 18S rRNA gene sequencing during the breeding season(July to August 2018).Four distinct distribution patterns(***;*** and Fuyang;***;***)of the microbial community and their potential effects on fishery activities were *** show lower abundances of Dinophyta and Fungi and higher abundances of Cryptophyta and Chlorophyta in Tonglu and Fuyang than those in the other three *** addition,the reserves(Tonglu and Fuyang)destabilized the original eukaryotic microbial co-occurrence *** all the environmental factors measured,nitrogen(nitrite,nitrate,ammonium),water temperature and total chlorophyll a acted as major driving factors that controlled the eukaryotic microbial ***,the existence of some algae(e.g.,Chrysophyceae,Cryptophytes,and Chlorophyceae)and fungi(e.g.,Rhizophydium)in Tonglu and Fuyang was beneficial to juvenile fish growth and water quality,although some detrimental species(e.g.,Aphanomyces)needed *** study provides further insights into the sustainable protection and utilization of rivers.

关键词： Qiantang River fish reserves 18S rRNA asymmetric eigenvector maps molecular ecological network analyses biological indicators

Protein supplementation intake for bodybuilding and resista nee training may impact sperm quality of subfertile men undergoing fertility treatment:a pilot study

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Asian Journal of Andrology 2019年第2期21卷 208-211页

作者： Shathmigha Ketheeswaran Thor Haahr betina Povlsen Rita Laursen Birgit Alsbjerg Helle Elbaek Sandro C Esteves Peter Humaidan The Fertility Clinic Skive Regional Hospital Resenvej 25Skive 7800Denmark Faculty of Health Aarhus UniversityAarhus C 8000Denmark ANDROFERT Center for Male ReproductionCampinas 13075-460Brazil Department of Surgery Division of UrologyUniversity of Campinas(UNICAMP)Campinas 13083-887Brazil

Dear Editor,During the last decade,there has been an increase in the usage of dietary protein supplements for bodybuilding,especially among young men who work out in commercial gyms.1 Recently,it was shown that 23 of 24 dietary supplements available in fitness equipment and online shops contained anabolic steroids.2 However,these supposedly pro-androgenic supplements presumably differ from the more commonly used whey and soy protein supplements.3,4 Notwithstanding,both products are listed as dietary supplements rather than medical drugs;thus,they are not rigorously tested,5 do not necessarily list all contents,2 and consequently might contain known and unknown active components3,6.

关键词： bodybuilding Protein supplementation fertility treatment

补充肌酸和抗阻训练促进人体股外侧肌废用性萎缩恢复的组织化学研究

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补充肌酸和抗阻训练促进人体股外侧肌废用性萎缩恢复的组织化学研...