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Seasonal dynamics of cyanobacteria and eukaryotic phytoplankton in a multiplereservoir recycling irrigation system

Ecological Processes 2019年第1期8卷 465-475页

作者： Ping Kong patricia richardson Chuanxue Hong Hampton Roads Agricultural Research and Extension Center Virginia Tech1444 Diamond Springs RoadVirginia BeachVA 23455USA

Background:Agricultural runoff recycling systems are manmade aquatic ecosystems of growing significance to global water sustainability,crop health,and *** study investigated the seasonal dynamics of microbial community in a three-reservoir recycling irrigation system with a stepwise water flow and compared with that of an adjacent runoff-free *** water from all production areas was captured in a sedimentation reservoir which overflowed to a transition reservoir then retention reservoir through a *** water was pumped to replenish the reservoirs as needed during growing ***:16S rDNA PCR clone libraries of quarterly water samples from three reservoirs and one stream were sequenced,and 575 operational taxonomic units(OTUs)were identified and assigned to cyanobacteria,eukaryotic phytoplankton,and other *** compared to the stream,three reservoirs consistently had low microbial diversity.A distinct seasonal pattern of microbial community structure was observed for each reservoir and the *** was consistently dominated by other *** reservoir was dominated by cyanobacteria during the summer and fall and eukaryotic phytoplankton during the winter and *** reservoir was dominated by cyanobacteria beginning in the spring but that dominance was altered when water was pumped from the stream from early spring to fall *** reservoir had the greatest shift of microbial community structure,being dominated by other bacteria in the summer,cyanobacteria in the fall,and eukaryotic phytoplankton in the winter and *** temperature and ammonium level were the two most important contributing factors to the seasonality of microbial community in these ***:The three recycling irrigation reservoirs consistently had lower microbial diversity and distinct community structure when compared to the *** reservoirs were typically dominated by cyanobacteria dur

关键词： Bacteria Cyanobacteria Phytoplankton Seasonal dynamics Water recycling Water quality

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英语沙龙（高中） 2005年第11期 17-18页

作者： patricia richardson 明廷雄

敢于尝试是迈向成功的一个关键因素。面对宝贵的机遇,犹豫退缩往往使我们与成功失之交臂。如果能相信自己,勇敢地去试一试,我们也许会迈向更大的成功。本文作者帕特里夏·理查森的第一次打工经历造就了她日后的成功。她后来成为了美国... 详细信息

敢于尝试是迈向成功的一个关键因素。面对宝贵的机遇,犹豫退缩往往使我们与成功失之交臂。如果能相信自己,勇敢地去试一试,我们也许会迈向更大的成功。本文作者帕特里夏·理查森的第一次打工经历造就了她日后的成功。她后来成为了美国广播公司电视节目主持人。

关键词：关键因素尝试欧洲大陆电视节目主持人成功客人早餐面条经历工作

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Perinatal Outcome of Inadvertent Immunization with the Measles-Rubella Vaccine in Pregnant Mexican Women during the Campaign for the Eradication of Congenital Rubella in 2008

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World Journal of Vaccines 2011年第1期1卷 1-4页

作者： Reyna Jesus Herbas Ilse Gómez Misael Vidal patricia richardson Vesta Cruz Edith Cruz Edith National Center for the Health of the Childhood and the Adolescence Ministery of Health Mexico

Objective: To investigate maternal and neonatal complications resulting from inadvertent immunization against rubella-measles during the first trimester of pregnancy. Methods: A prospective and descriptive study was carried out, including a total of 1,924 pregnant women, 175 (9.1%) of which were classified as non responding to infection by the rubella virus. They underwent clinical and ultrasonographic follow-up to dismiss maternal or fetal complications and complications at the time of delivery. The infant was checked to determine demographic, anthropometric, serological and clinical features at the time of birth. Results: No women had complications during the pregnancy, including exanthematic symptoms. 174/175 newborns were studied;one pregnancy was interrupted based on non-medical arguments. The findings in terms of the analyzed patients suggest a benign evolution after inadvertently immunizing the pregnant women, which support studies with similar results. No complications during the course of the pregnancy or phenotypic alterations of the infant at the time of birth are suggested.

关键词： Congenital Rubella Pregnancy Perinatal Repercussion

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