2011
DOI: 10.1371/journal.pone.0016553
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Abstract: BackgroundUpwelling systems are characterised by an intense primary biomass production in the surface (warmest) water after the outcrop of the bottom (coldest) water, which is rich in nutrients. Although it is known that the microbial assemblage plays an important role in the food chain of marine systems and that the upwelling systems that occur in southwest Brazil drive the complex dynamics of the food chain, little is known about the microbial composition present in this region.Methodology/Principal Findings… Show more

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Cited by 51 publications
(49 citation statements)
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“…A comparison of all Polaribacter OTUs in the plume to environmental variables showed correlation with temperature, DO, bacterial production rate, DOC, and upwelling (r ¼ 0.576, Table 2). Additionally, the relative abundance of the top indicator, Polaribacter OTU 9443, was positively correlated with bacterial production (r ¼ 0.557, Figure 6e) and this OTU closely matched sequences of clones from coastal upwelling systems, including the Brazilian (Cury et al, 2011) and Chilean coasts (Pommier et al, 2007), as well as along the Oregon coast during a diatom bloom (Morris et al, 2006), further demonstrating the prevalence of this taxon in highly productive coastal environments like the Columbia River plume.…”
Section: Discussionmentioning
confidence: 70%
“…A comparison of all Polaribacter OTUs in the plume to environmental variables showed correlation with temperature, DO, bacterial production rate, DOC, and upwelling (r ¼ 0.576, Table 2). Additionally, the relative abundance of the top indicator, Polaribacter OTU 9443, was positively correlated with bacterial production (r ¼ 0.557, Figure 6e) and this OTU closely matched sequences of clones from coastal upwelling systems, including the Brazilian (Cury et al, 2011) and Chilean coasts (Pommier et al, 2007), as well as along the Oregon coast during a diatom bloom (Morris et al, 2006), further demonstrating the prevalence of this taxon in highly productive coastal environments like the Columbia River plume.…”
Section: Discussionmentioning
confidence: 70%
“…Meanwhile, bacterial growth could be suppressed during the presence of SACW possibly due to its low temperature (GUENTHER et al, 2008). Besides Bacteria, Archaea are also important to carbon and nitrogen cycles in both the superficial and deep waters of the region (CURY et al, 2011). Meanwhile, the role of individual bacterial subgroups in oceanic food webs and biogeochemical cycles requires more research (YOKOKAWA; NAGATA, 2010).…”
Section: Physical-biological Interactions: Ecological Consequences Ofmentioning
confidence: 99%
“…The contribution of these different water types induces spatial and temporal variation in composition and abundance of bacterioplankton, phytoplankton and zooplankton, and community changes correlate with upwelling events (VALENTIN et al, 1987b;CURY et al, 2011). Valentin (2001) suggested that drift currents carry larvae out to the open sea which later return as adults to coastal surface waters when the duration of the upwelling events corresponds to the duration of the zooplankton life cycle.…”
Section: Physical-biological Interactions: Ecological Consequences Ofmentioning
confidence: 99%
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“…A wide spatial variability in the composition of bacterial assemblages is observed in upwelling and frontal systems, indicating that oceanographic regimes (Alonso-Saez et al 2007) and anthropogenic pressures (Cury et al 2011) are important to shape bacterial community structure. Upwelling regions are known as important places of nitrogen loss in the marine systems as a consequence of microbial activities.…”
Section: Introductionmentioning
confidence: 99%