16 Result(s)
within
Cynthia B. Silveira
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Article
Open AccessWater mass age structures the auxiliary metabolic gene content of free-living and particle-attached deep ocean viral communities
Viruses play important roles in the ocean’s biogeochemical cycles. Yet, deep ocean viruses are one of the most under-explored fractions of the global biosphere. Little is known about the environmental factors ...
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Article
Open AccessViruses of sulfur oxidizing phototrophs encode genes for pigment, carbon, and sulfur metabolisms
Viral infections modulate bacterial metabolism and ecology. Here, we investigated the hypothesis that viruses influence the ecology of purple and green sulfur bacteria in anoxic and sulfidic lakes, analogs of ...
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Article
Open AccessViral predation pressure on coral reefs
Predation pressure and herbivory exert cascading effects on coral reef health and stability. However, the extent of these cascading effects can vary considerably across space and time. This variability is like...
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Article
Open AccessBenthic assemblages are more predictable than fish assemblages at an island scale
Decades of research have revealed relationships between the abundance of coral reef taxa and local conditions, especially at small scales. However, a rigorous test of covariation requires a robust dataset coll...
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Article
Extending the natural adaptive capacity of coral holobionts
Anthropogenic climate change and environmental degradation destroy coral reefs, the ecosystem services they provide, and the livelihoods of close to a billion people who depend on these services. Restoration a...
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Article
Open AccessGenomic and ecological attributes of marine bacteriophages encoding bacterial virulence genes
Bacteriophages encode genes that modify bacterial functions during infection. The acquisition of phage-encoded virulence genes is a major mechanism for the rise of bacterial pathogens. In coral reefs, high bac...
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Article
Open AccessMarine viruses discovered via metagenomics shed light on viral strategies throughout the oceans
Marine viruses are key drivers of host diversity, population dynamics and biogeochemical cycling and contribute to the daily flux of billions of tons of organic matter. Despite recent advancements in metagenom...
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Article
Open AccessPiggyback-the-Winner in host-associated microbial communities
Phages can exploit their bacterial hosts by lytic infection, when many viral particles are released at cell lysis, or by lysogeny, when phages integrate into the host’s genome. We recently proposed a new dynam...
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Article
Global microbialization of coral reefs
Microbialization refers to the observed shift in ecosystem trophic structure towards higher microbial biomass and energy use. On coral reefs, the proximal causes of microbialization are overfishing and eutroph...
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Article
Antibiotic Resistance is Widespread in Urban Aquatic Environments of Rio de Janeiro, Brazil
Bacterial resistance to antibiotics has become a public health issue. Over the years, pathogenic organisms with resistance traits have been studied due to the threat they pose to human well-being. However, sev...
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Reference Work Entry In depth
The Family Alcanivoraceae
The family Alcanivoracaceae comprises of species capable of degradation of petroleum-derived compounds as their main carbon source. These are Gram-negative, aerobic, rod-shaped bacteria commonly isolated in marin...
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Article
Open AccessBacterial community composition shifts in the gut of Periplaneta americana fed on different lignocellulosic materials
Cockroaches are omnivorous animals that can incorporate in their diets food of different composition, including lignocellulosic materials. Digestion of these compounds is achieved by the insect’s own enzymes a...
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Article
Microbial Community Compositional Shifts in Bleached Colonies of the Brazilian Reef-Building Coral Siderastrea stellata
The association of metazoan, protist, and microbial communities with Scleractinian corals forms the basis of the coral holobiont. Coral bleaching events have been occurring around the world, introducing change...
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Article
Archaea, Bacteria, and Algal Plastids Associated with the Reef-Building Corals Siderastrea stellata and Mussismilia hispida from Búzios, South Atlantic Ocean, Brazil
Reef-building corals may be seen as holobiont organisms, presenting diverse associated microbial communities. Best known is the symbiotic relationship with zooxanthellae, but Archaea, Bacteria, fungi, viruses,...
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Article
Archaeal and bacterial communities of heavy metal contaminated acidic waters from zinc mine residues in Sepetiba Bay
Mining of metallic sulfide ore produces acidic water with high metal concentrations that have harmful consequences for aquatic life. To understand the composition and structure of microbial communities in acid...
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Article
Bacterial communities of the marine sponges Hymeniacidon heliophila and Polymastia janeirensis and their environment in Rio de Janeiro, Brazil
In this study we performed a survey of the bacterial communities associated with the Western Atlantic demosponges Hymeniacidon heliophila and Polymastia janeirensis, based on 16S rRNA sequencing and transmission ...
