Dynamics of<i>Vibrio</i>Populations and Their Role in Environmental Nutrient Cycling

Thompson, Janelle R.; Polz, Martin F.

doi:10.1128/9781555815714.ch13

Cited by 63 publications

(42 citation statements)

References 128 publications

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“…Vibrio spp. can use a large variety of different carbon sources [65,66], and a significant positive relationship between TOC and the abundance of V. alginolyticus and V. parahaemolyticus in sediments observed in this study suggests that these species could potentially gain energy from benthic organic carbon mineralization.…”

Section: Discussionmentioning

confidence: 77%

Temporal and Spatial Distribution Patterns of Potentially Pathogenic Vibrio spp. at Recreational Beaches of the German North Sea

Böer

Heinemeyer²,

Luden³

et al. 2013

Microb Ecol

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The number of reported Vibrio-related wound infections associated with recreational bathing in Northern Europe has increased within the last decades. In order to study the health risk from potentially pathogenic Vibrio spp. in the central Wadden Sea, the seasonal and spatial distribution of Vibrio vulnificus, Vibrio parahaemolyticus, Vibrio alginolyticus and Vibrio cholerae were investigated at ten recreational beaches in this area over a 2-year period. V. alginolyticus and V. parahaemolyticus were found to be omnipresent all year round in the study area, while V. vulnificus occurrence was restricted to summer months in the estuaries of the rivers Ems and Weser. Multiple linear regression models revealed that water temperature is the most important determinant of Vibrio spp. occurrence in the area. Differentiated regression models showed a species-specific response to water temperature and revealed a particularly strong effect of even minor temperature increases on the probability of detecting V. vulnificus in summer. In sediments, Vibrio spp. concentrations were up to three orders of magnitude higher than in water. Also, V. alginolyticus and V. parahaemolyticus were found to be less susceptible towards winter temperatures in the benthic environment than in the water, indicating an important role of sediments for Vibrio ecology. While only a very small percentage of tested V. parahaemolyticus proved to be potentially pathogenic, the presence of V. vulnificus during the summer months should be regarded with care.

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Section: Discussionmentioning

confidence: 77%

Temporal and Spatial Distribution Patterns of Potentially Pathogenic Vibrio spp. at Recreational Beaches of the German North Sea

Böer

Heinemeyer²,

Luden³

et al. 2013

Microb Ecol

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“…Vibrio have evolved adaptations to starvation pressures and have been shown to persist for long periods under conditions of nutrient limitation (Eilers et al, 2000). Vibrio have been shown to reduce cell volume in response to starvation (Denner et al, 2002;Thompson and Polz, 2006), yet maintain a high number of rRNA copies to rapidly ramp up protein synthesis when conditions become more favorable (Eilers et al, 2000;Polz et al, 2006). This metabolic flexibility could be ecologically advantageous in the open ocean environment with varying nutrient regimes.…”

Section: Discussionmentioning

confidence: 99%

“…Vibrio have a broad metabolic and genomic potential, are able to take advantage of ephemeral pulses of nutrients through chemotaxis and motility, and show rapid growth in response to nutrient addition (Worden et al, 2006;Takemura et al, 2014;Westrich et al, 2016). Vibrio are often found in close association with plankton and marine particulates where they degrade a broad range of substrates with extracellular enzymatic proteins such as chitinases, proteases, and lipases (Thompson and Polz, 2006), but can also survive in a free-living state (Worden et al, 2006;Hunt et al, 2008). Vibrio tend to be biogeographically associated with nutrient-rich, copiotrophic environments of near-shore systems (Takemura et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Vibrio Population Dynamics in Mid-Atlantic Surface Waters during Saharan Dust Events

Westrich

Griffin

Westphal³

et al. 2018

Front. Mar. Sci.

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Vibrio is a cosmopolitan genus of marine bacteria, highly investigated in coastal and estuarine environments. Vibrio have also been isolated from pelagic waters, yet very little is known about the ecology of these oligotrophic species. In this study we examined the relative change in bacterial abundance and more specifically the dynamics of Vibrio in the tropical North Atlantic in response to the arrival of pulses of Saharan dust aerosols, a major source of biologically important nutrients for downwind marine surface waters. Aerosol and surface water samples were collected over 1 month coinciding with at least two distinct dust events. Total bacterial counts increased by 1.6-fold correlating with the arrival of Saharan dust (r = 0.76; p = 0.001). Virus-like particles (VLP) also followed this trend and were correlated with bacterial counts (r = 0.67; p = 0.01). Vibrio specific qPCR targeting the 16S rRNA gene ranged from below detection limits to a high of 9,145 gene copies ml −1 with the arrival of dust. This increase equated to 6.5 × 10 2 −1.5 × 10 3 individual genome equivalents ml −1 based on the known range of 16S rRNA copies among this genus. Vibrio exhibited bloom-bust cycles potentially attributed to selective viral lysis or bloom depletion of organic carbon. This work is one of the few studies to examine the open ocean ecology of Vibrio, a conditionally rare taxon, whose bloom-bust lifestyle likely is a contributing factor in the flow of nutrients and energy in pelagic ecosystems.

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“…Like other opportunistic heterotrophic bacteria, Vibrio can have disproportionately large impacts on carbon and nutrient processing because of their ability to reproduce rapidly and respond to pulses of newly available resources (2,(5)(6)(7). Characterized as "opportunitrophs," Vibrio have a broad genomic and metabolic repertoire (8), allowing them to compete in highly variable nutrient environments ranging from the open ocean to pathogenic associations with animal hosts (3,9).…”

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confidence: 99%

Saharan dust nutrients promote Vibrio bloom formation in marine surface waters

Westrich

Ebling

Landing

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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Vibrio is a ubiquitous genus of marine bacteria, typically comprising a small fraction of the total microbial community in surface waters, but capable of becoming a dominant taxon in response to poorly characterized factors. Iron (Fe), often restricted by limited bioavailability and low external supply, is an essential micronutrient that can limit Vibrio growth. Vibrio species have robust metabolic capabilities and an array of Fe-acquisition mechanisms, and are able to respond rapidly to nutrient influx, yet Vibrio response to environmental pulses of Fe remains uncharacterized. Here we examined the population growth of Vibrio after natural and simulated pulses of atmospherically transported Saharan dust, an important and episodic source of Fe to tropical marine waters. As a model for opportunistic bacterial heterotrophs, we demonstrated that Vibrio proliferate in response to a broad range of dust-Fe additions at rapid timescales. Within 24 h of exposure, strains of Vibrio cholerae and Vibrio alginolyticus were able to directly use Saharan dust–Fe to support rapid growth. These findings were also confirmed with in situ field studies; arrival of Saharan dust in the Caribbean and subtropical Atlantic coincided with high levels of dissolved Fe, followed by up to a 30-fold increase of culturable Vibrio over background levels within 24 h. The relative abundance of Vibrio increased from ∼1 to ∼20% of the total microbial community. This study, to our knowledge, is the first to describe Vibrio response to Saharan dust nutrients, having implications at the intersection of marine ecology, Fe biogeochemistry, and both human and environmental health.

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Dynamics ofVibrioPopulations and Their Role in Environmental Nutrient Cycling

Cited by 63 publications

References 128 publications

Temporal and Spatial Distribution Patterns of Potentially Pathogenic Vibrio spp. at Recreational Beaches of the German North Sea

Temporal and Spatial Distribution Patterns of Potentially Pathogenic Vibrio spp. at Recreational Beaches of the German North Sea

Vibrio Population Dynamics in Mid-Atlantic Surface Waters during Saharan Dust Events

Saharan dust nutrients promote Vibrio bloom formation in marine surface waters

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