A5005165604- Microbial Community Ecology and Physiology
- Protist diversity and phylogeny
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Marine Toxins and Detection Methods
- Marine Bivalve and Aquaculture Studies
- Environmental DNA in Biodiversity Studies
- Photosynthetic Processes and Mechanisms
- Ocean Acidification Effects and Responses
- Coral and Marine Ecosystems Studies
- Salmonella and Campylobacter epidemiology
- Escherichia coli research studies
- Bacteriophages and microbial interactions
- Freshwater macroinvertebrate diversity and ecology
European Molecular Biology Laboratory
2019-2023
Instituto de Fomento Pesquero
2023
University of Concepción
2014-2021
Millennium Institute of Oceanography
2014-2021
Pontificia Universidad Católica de Chile
2004-2010
Cyanobacterial morphology is diverse, ranging from unicellular spheres or rods to multicellular structures such as colonies and filaments. Multicellular species represent an evolutionary strategy differentiate compartmentalize certain metabolic functions for reproduction nitrogen (N2) fixation into specialized cell types (e.g. akinetes, heterocysts diazocytes). Only a few filamentous, differentiated cyanobacterial species, with genome sizes over 5 Mb, have been sequenced. We sequenced the...
Significance The marine unicellular cyanobacterium Prochlorococcus is the most abundant photosynthetic organism on Earth. Members of this genus are classically thought to be adapted high-oxygen and nutrient-poor ocean conditions, with a principle divergence between high-light low-light ecotypes. We show that basal lineages low-oxygen, low-light, high-nutrient conditions found in dimly illuminated waters anoxic zones. have retained phycobilisomes as light-harvesting antennae—a characteristic...
Sulfur-oxidizing Gamma-proteobacteria are abundant in marine oxygen-deficient waters, and appear to play a key role previously unrecognized cryptic sulfur cycle. Metagenomic analyses of members the uncultured SUP05 lineage Canadian seasonally anoxic fjord Saanich Inlet (SI), hydrothermal plumes Guaymas Basin (GB) single cell genomics analysis two ARCTIC96BD-19 representatives from South Atlantic Sub-Tropical Gyre (SASG) have shown them be metabolically versatile. However, SI GB bacteria seem...
ABSTRACT The large pathogenicity island (SPI7) of Salmonella enterica serovar Typhi is a 133,477-bp segment DNA flanked by two 52-bp direct repeats overlapping the pheU (phenylalanyl-tRNA) gene, contains 151 potential open reading frames, and includes viaB operon involved in synthesis Vi antigen. Some clinical isolates S. are missing entire SPI7, due to its precise excision; these strains have lost ability produce antigen, resistant phage Vi-II, invade human epithelial cell line more...
For decades, marine plankton have been investigated for their capacity to modulate biogeochemical cycles and provide fishery resources. Between the sunlit (epipelagic) layer deep dark waters, lies a vast heterogeneous part of ocean: mesopelagic zone. How composition is shaped by environment has well-explored in epipelagic but much less ocean. Here, we conducted comparative analyses trans-kingdom community assemblages thriving oxygen minimum zone (OMZ), oxic, counterparts. We identified nine...
Seasonal wind-driven upwelling, high primary production in surface waters, and oxygen deficiency subsurface waters characterize the coastal ecosystem of subtropical eastern South Pacific (ESP), shape nature dynamics microbial community structure function. We investigated diversity, abundance, transcriptional levels gene encoding large subunit form II RuBisCO enzyme (cbbM) pelagic at a continental-shelf site off central Chile over two years. focused on cbbM genes affiliated with...
Abstract For decades, marine plankton have been investigated for their capacity to modulate biogeochemical cycles and provide fishery resources. Between the sunlit (epipelagic) layer deep dark waters, lies a vast heterogeneous part of ocean: mesopelagic zone. How composition is shaped by environment has well-explored in epipelagic but much less ocean. Here, we conducted comparative analyses trans-kingdom community assemblages thriving oxygen minimum zone (OMZ), oxic, counterparts. We...
ABSTRACT Euphausiids (or krill) are important contributors to marine biomass and key players in pelagic trophic webs. stomachs represent a specific niche for microbes that participate the digestion of host dietary components. To date, methods study diversity function these microorganisms remain complex. Often, bacterial ribosomal sequences obtained from lysates overrepresented by organisms surrounding environment. Flow cytometry with cell sorting (FC-CS) have become powerful technique...
Abstract Euphausiids (krill) are important contributors to marine biomass and key players in pelagic trophic webs. Euphausiid stomachs represent a specific niche for microbes that participate the digestion of host’s dietary components. Methods study diversity function these microorganisms remain complex. Bacterial ribosomal sequences obtained from lysates often overrepresented by organisms surrounding environment. Flow cytometry with cell sorting (FC-CS) have become powerful technique...