检索结果-南通市图书馆

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

引用

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 research.However,information on the distribution patterns of eukaryotic microbial community structures(EMCSs)within oceans remains unclear.In 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 season.The 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 Sea.In addition,there were notable potential effects of EMCSs on fishery activities.The 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 P.crocea.In addition,all the environmental factors were the main factors driving the distribution of eukaryotic microbes except for total phosphorus.Furthermore,it was noted some phytoplankton such as Poterioochromonas and Rhizophydium of fungi in Sansha Bay can effectively prevent Cyanobacteria blooms.Chrysophyceae are natural high-quality baits for juvenile fish distributed in Sansha Bay,Mindong and Wentai reserves.This 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 systems.In 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 system.The 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 samples.The 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 rRNA.The 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 nutrients.Similarly,significantly increased oxygen consumption rates were evident in the clam area signifying improved oxygen distribution within the sediment.The organic effluent contents associated with total-organic matter,carbon,nitrogen,and,phosphate were lower among the clam treatments relative to the control.Our results describe the potential roles and mechanisms contributed by marine bivalve S.subcrenata 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 hotspot.However,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 limited.To 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 Bay.Results show that the structure of the bacterioplankton community in Sansha Bay had a significant seasonal succession.Moreover,the representative zero-radius Operation Taxon Units in different seasons were significantly different among the three selected sea areas.Specifically,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 dominant.Furthermore,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 difference.In addition,the bioindicator functions screened by Functional Annotation of Prokaryotic Taxa and random forest machine learning mainly relied on compound degradation,nitrite oxidation,and photoheterotrophy.The 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 BA.Based 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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(1.Jiande;2.Tonglu and Fuyang;3.Jiubao;4.Yanguan)of the microbial community and their potential effects on fishery activities were observed.Results show lower abundances of Dinophyta and Fungi and higher abundances of Cryptophyta and Chlorophyta in Tonglu and Fuyang than those in the other three sections.In addition,the reserves(Tonglu and Fuyang)destabilized the original eukaryotic microbial co-occurrence network.Among 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 distribution.Furthermore,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 attention.This 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

象山港大黄鱼Pseudosciaena crocea网箱养殖区沉积物-水界面营养盐通量研究

引用

海洋学研究 2016年第1期34卷 84-92页

作者：廖红芳郑忠明 regan nicholaus 朱津永宁波大学海洋学院浙江宁波315211 临武一中湖南郴州424300 浙江海洋高效健康养殖协同创新中心浙江宁波315211

2013年5月、8月和11月调查了象山港大黄鱼网箱养殖区及附近沉积物中总有机氮(TON)、总有机碳(TOC)和总磷(TP)含量,并采用实验室模拟法研究了底泥耗氧率(SOCs)和沉积物-水界面营养盐(NH+4、NO-2+NO-3和PO3-4)通量。结果表明:养殖区(YZ)... 详细信息

2013年5月、8月和11月调查了象山港大黄鱼网箱养殖区及附近沉积物中总有机氮(TON)、总有机碳(TOC)和总磷(TP)含量,并采用实验室模拟法研究了底泥耗氧率(SOCs)和沉积物-水界面营养盐(NH+4、NO-2+NO-3和PO3-4)通量。结果表明:养殖区(YZ)沉积物中的TON和TP含量显著高于距离养殖区50m(F1)和100m(F2)的区域(P<0.05)。底泥释放NH+4到上覆水中,但是从上覆水中吸收NO-2+NO-3和PO3-4。沉积物-水界面营养盐通量表现出明显的季节性变化,在8月,NH+4及PO3-4的释放量达到最大值。上覆水中NH+4、NO-2+NO-3和PO3-4的质量浓度随着沉积物-水界面营养盐通量的变化而变化。研究表明,象山港大黄鱼养殖活动对养殖区底泥造成了一定污染,且通过影响沉积物-水界面营养盐通量影响上覆水中营养盐分布,最终给整个养殖系统造成生态负担。

关键词：养殖大黄鱼底泥营养盐通量象山港

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Prevalence and Clinical Manifestations of Co-Infection in Pediatric Infectious Mononucleosis: A Single-Centered, Retrospective Study

引用

Open Journal of Pediatrics 2024年第3期14卷 459-475页

作者： Abdishakur Abdukadir Muse Zakaria Ahmed Mohamed Pu Yang Lihong Liao Bibek Dhar Shrestha Agness nicholaus Kanusya Paul Mwale Youping Deng Dongchi Zhao Department of Pediatrics Zhongnan Hospital of Wuhan University Wuhan China Department of Ophthalmology Zhongnan Hospital of Wuhan University Wuhan China

Background: Recent studies indicate that the incidence of infectious mononucleosis (IM) has increased in China. Furthermore, it has been shown that children diagnosed with IM are prone to acquiring other pathogens. However, there is limited research on the prevalence of these co-infections in children with IM. Thus, we conducted this study to determine the prevalence of coinfections and common pathogens, as well as to compare clinical manifestations in children with and without coinfections. Methods: This retrospective observational study was conducted at the Department of Pediatrics Zhongnan Hospital of Wuhan University, Wuhan, China, with data from January 2018 to January 2023. Data, including demographics, symptoms, lab results, and complications, were collected from the hospital’s electronic database and analyzed. The statistical analysis included descriptive statistics, independent samples t-tests and Mann-Whitney tests to compare the means of continuous variables. Statistical significance was determined by p-values less than 0.05. Results: The study involved 216 participants diagnosed with IM, predominantly males (61.6%) aged 0 - 4 years (50.9%). Coinfection was detected in 39.8% of children, with multiple pathogens present in 33.72% of these cases. Among coinfection cases, 40% occurred in children under 5 years old, and females made up 54.2% of these cases. Mycoplasma pneumoniae (MP) was the most prevalent pathogen, accounting for 18.1% of cases. Influenza B (IFB) and Influenza A (IFA) viruses were found in 16.7% and 13.9% of participants, respectively, indicating a notable occurrence of respiratory pathogen coinfections. Male gender, fever, tonsillopharyngitis, lower HGB levels, higher ESR, CRP, and AST levels were correlated with coinfections. Conclusion: In summary, the study revealed a high prevalence of coinfections among children diagnosed with IM, particularly involving Mycoplasma pneumoniae and influenza viruses. These coinfections were notably common in children under 5 years old and were mo

关键词： Prevalence Mononucleosis Coinfection Children Epstein-Barr Virus Features

来源：

维普期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Development of a Remotely Controlled Testing Platform with Low-drag Air-ventilated Hull

引用

Journal of Marine Science and Application 2015年第1期14卷 25-29页

作者： Konstantin I. Matveev nicholaus I. Perry Alexander W. Mattson Christopher S. Chaney School of Mechanical and Materials Engineering Washington State University Pullman WA 99164-2920 USA

这份报纸探讨发展并且有创新的通气空气的壳的一个遥远地控制的船平台严峻。轮船壳的下侧上的空气洞的申请是一答应为减少水动力学的工具拖和污染物质排出物和增加的海洋的交通效率。尽管有这个概念潜力，设计优化和新奇空气洞轮船的高... 详细信息

这份报纸探讨发展并且有创新的通气空气的壳的一个遥远地控制的船平台严峻。轮船壳的下侧上的空气洞的申请是一答应为减少水动力学的工具拖和污染物质排出物和增加的海洋的交通效率。尽管有这个概念潜力，设计优化和新奇空气洞轮船的高效的操作仍然是一个挑战性的问题。赫尔建设和模型规模空气洞船的传感器乐器学在纸被描述。壳的模块化的结构允许容易的修正，和一个电的推进单位启用自己推动的操作。船经由一个收音机传播系统遥远地被控制。起始的测试的结果被报导，包括在几的戳，速度，和气流率装载条件。构造平台能被用于优化空气洞系统并且测试另外的创新的壳图案。这个系统能也被开发进一只高效的无人的船。

关键词：测试平台远程控制低阻力通风空气开发船体结构传输系统

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tobacco Production Baseline Survey in Serengeti, Tarime and Rorya Districts, Mara Region

引用

Journal of Agricultural Science and Technology(B) 2012年第4期2卷 471-481页

作者： nicholaus Musimu Kuboja Asheri Mwamba Kalala Jacob Bulenga Lisuma Mariam Mrutu Tumbi-Agricultural Research and Development Institute P.O. Box 306 Tabora Tanzania Tobacco Research Institute of Tanzania （TORITA） P.O. Box 431 Tabora Tanzania Tabora Regional Cathment Forest Office P.O. Box 1285 Tabora Tanzania

Using 2009/2010 cropping season survey data from 181 randomly selected smallholder tobacco farmers, this study provides baseline information on tobacco farming in Mara region. Both descriptive and inferential statistics were employed in data analysis. Result indicates that farmers adopted tobacco farming from tobacco farmers in Kenya. Drought and inadequate supply of inputs were identified as the major production constraints. Others were incidence of pests and diseases, shortage of fire woods, poor extension services and hailstones. Low selling price and contradicting grading systems were the major tobacco marketing constraints. The study also revealed that access to extension services was similar across study districts with over 65.7% of the respondents accessing technical expertise mainly from Alliance One Tanzania employees. Given the positive and negative impacts of tobacco farming, majority of the respondents (95.6%) still were willing to proceed with tobacco farming as their main source of income. However, watermelon, maize and sunflower were ranked as first priority alternative cash crops to tobacco in Serengeti, Tarime and Rorya districts, respectively. This study concludes that tobacco farming still is the main household income source; hence, more investment is required to ensure sustainable economic development of rural communities in Mara region.

关键词：烟草生产基线调查种植季节延伸服务烟草种植经济作物家庭收入随机选择

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

工程师开发高质量PCB设计指南

引用

今日电子 2013年第10期 29-31页

作者： nicholaus W Smith DT公司

现代电子系统最关键的部分是电路。销售的每一部件构成了电路以及电路与用户接口的互联，这一般通过印刷电路板（PCB）来实现。便携式电子设备、计算机和娱乐设备中有大量的PCB。

关键词： PCB 设计指南工程师印刷电路板便携式电子设备质量开发现代电子系统

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：