Virioplankton
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Virioplâncton na Amazônia: estudo da diversidade dos vírus das famílias Phycodnaviridae e Myoviridae nos rios Negro, Solimões e Cuieiras. / Virioplankton in the Amazon: diversity study of viruses from Phycodnaviridae and Myoviridae families in the Negro, Solimões and Cuieiras rivers.
O virioplâncton é o mais diverso e o mais abundante componente do plâncton, o qual exerce grande importância ecológica, estando envolvido em processos de ciclagem de nutrientes, diversificação e distribuição de algas e bactérias, controle de florações fitoplanctônicas, formação de nuvens e transferência gênica horizontal. Os objetivos deste
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2010
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2. Virioplankton Abundance in Trophic Gradients of an Upwelling Field
This work correlates time series of biological and physical variables to the marine viruses across trophic gradients within Arraial do Cabo upwelling system, Southeast of Brazil. The objective is to investigate the major controlling factors of virioplankton dynamics among different water masses. It was used an in situ and ex situ flow cytometry for accessing
Brazilian Journal of Microbiology. Publicado em: 2009-12
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3. Hybridization Analysis of Chesapeake Bay Virioplankton†
It has been hypothesized that, by specifically lysing numerically dominant host strains, the virioplankton may play a role in maintaining clonal diversity of heterotrophic bacteria and phytoplankton populations. If viruses selectively lyse only those host species that are numerically dominant, then the number of a specific virus within the virioplankton woul
American Society for Microbiology.
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4. Population Dynamics of Chesapeake Bay Virioplankton: Total-Community Analysis by Pulsed-Field Gel Electrophoresis†
Recognition of viruses as the most abundant component of aquatic microbial communities has stimulated investigations of the impact of viruses on bacterio- and phytoplankton host communities. From results of field studies to date, it is concluded that in most aquatic environments, a reduction in the number of bacteria on a daily basis is caused by viral infec
American Society for Microbiology.
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5. Large-Scale Spatial Distribution of Virioplankton in the Adriatic Sea: Testing the Trophic State Control Hypothesis
Little is known concerning environmental factors that may control the distribution of virioplankton on large spatial scales. In previous studies workers reported high viral levels in eutrophic systems and suggested that the trophic state is a possible driving force controlling the spatial distribution of viruses. In order to test this hypothesis, we determin
American Society for Microbiology.
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6. Virioplankton: Viruses in Aquatic Ecosystems†
The discovery that viruses may be the most abundant organisms in natural waters, surpassing the number of bacteria by an order of magnitude, has inspired a resurgence of interest in viruses in the aquatic environment. Surprisingly little was known of the interaction of viruses and their hosts in nature. In the decade since the reports of extraordinarily larg
American Society for Microbiology.
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7. Impact of Virioplankton on Archaeal and Bacterial Community Richness as Assessed in Seawater Batch Cultures
During cruises in the tropical Atlantic Ocean (January to February 2000) and the southern North Sea (December 2000), experiments were conducted to monitor the impact of virioplankton on archaeal and bacterial community richness. Prokaryotic cells equivalent to 10 to 100% of the in situ abundance were inoculated into virus-free seawater, and viruses equivalen
American Society for Microbiology.