Isolation and characterization of Erythrobacter sp. strains from the upper ocean

Koblížek, Michal; Béjà, Oded; Bidigare, Robert R.; Christensen, Stephanie; Benitez-Nelson, Bryan C.; Vetriani, Costantino; Kolber, M.; Falkowski, Paul G.; Kolber, Zbigniew

doi:10.1007/s00203-003-0596-6

Cited by 155 publications

(173 citation statements)

References 31 publications

Supporting

Mentioning

157

Contrasting

Order By: Relevance

“…Moreover, the BChl-a content per cell was significantly higher in the ultra-oligotrophic eastern basin than in the two other basins. Assuming that BChl-a quotas indicate the extent of phototrophic potential (Cottrell et al, 2006), our data suggest that reliance on phototrophy varied along the oligotrophic gradient and that nutrient and/or carbon limitation favors BChl-a synthesis in natural communities as it has been reported for AAP cultures (Koblížek et al, 2003;Yurkov and Csotonyi, 2009). …”

Section: Bacterial Productionsupporting

confidence: 61%

“…In contrast, various reports showed that these organisms are abundant in eutrophic as well as in oligotrophic environments (Jiao et al, 2007;Koblížek et al, 2006;Yutin et al, 2007). Other authors suggested that nutrient concentrations (Mašín et al, 2008), attachment to particles Waidner and Kirchman, 2007) or light intensity (Koblížek et al, 2003;Shiba, 1991) may influence AAP bacterial abundance.…”

mentioning

confidence: 95%

See 1 more Smart Citation

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

et al. 2011

View full text Add to dashboard Cite

Abstract. Aerobic anoxygenic phototrophic (AAP) bacteria are photoheterotrophic prokaryotes able to use both light and organic substrates for energy production. They are widely distributed in coastal and oceanic environments and may contribute significantly to the carbon cycle in the upper ocean. To better understand questions regarding links between the ecology of these photoheterotrophic bacteria and the trophic status of water masses, we examined their horizontal and vertical distribution and the effects of nutrient additions on their growth along an oligotrophic gradient in the Mediterranean Sea. Concentrations of bacteriochlorophyll-a (BChl-a) and AAP bacterial abundance decreased from the western to the eastern basin of the Mediterranean Sea and were linked with concentrations of chlorophyll-a, nutrient and dissolved organic carbon. Inorganic nutrient and glucose additions to surface seawater samples along the oligotrophic gradient revealed that AAP bacteria were nitrogen-and carbon-limited in the ultraoligotrophic eastern basin. The intensity of the Correspondence to: D. Lamy (lamyd2@univie.ac.at) AAP bacterial growth response generally differed from that of the total bacterial growth response. BChl-a quota of AAP bacterial communities was significantly higher in the eastern basin than in the western basin, suggesting that reliance on phototrophy varied along the oligotrophic gradient and that nutrient and/or carbon limitation favors BChl-a synthesis.

show abstract

Section: Bacterial Productionsupporting

confidence: 61%

mentioning

confidence: 95%

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

et al. 2011

View full text Add to dashboard Cite

show abstract

“…These OTUs belong to a group of widespread oligotrophic budding organisms found in many aquatic environments but with no evidence for pathogenicity (Stahl et al, 1992;Weiner et al, 2000;Badger et al, 2005). Other taxa enriched in the Porites exudate amendments included OTUs closely related to the Alphaproteobacteria Sneathiella and Erythrobacter and to the Gammaproteobacteria Haliea and Thalassobius, all associated with free-living oligotrophic to mesotrophic coastal marine environments and with no known pathogenic lifestyles (Koblížek et al, 2003;Jordan et al, 2007;Urios et al, 2008;Park et al, 2012). Thus, the primary organisms selectively enriched by the coral exudates are widely distributed marine bacterioplankton, with no association with pathogenic or otherwise harmful lifestyles.…”

Section: Differential Growth Of Bacterioplankton Taxa On Dom Exudatesmentioning

confidence: 99%

Coral and macroalgal exudates vary in neutral sugar composition and differentially enrich reef bacterioplankton lineages

et al. 2013

View full text Add to dashboard Cite

Increasing algal cover on tropical reefs worldwide may be maintained through feedbacks whereby algae outcompete coral by altering microbial activity. We hypothesized that algae and coral release compositionally distinct exudates that differentially alter bacterioplankton growth and community structure. We collected exudates from the dominant hermatypic coral holobiont Porites spp. and three dominant macroalgae (one each Ochrophyta, Rhodophyta and Chlorophyta) from reefs of Mo'orea, French Polynesia. We characterized exudates by measuring dissolved organic carbon (DOC) and fractional dissolved combined neutral sugars (DCNSs) and subsequently tracked bacterioplankton responses to each exudate over 48 h, assessing cellular growth, DOC/DCNS utilization and changes in taxonomic composition (via 16S rRNA amplicon pyrosequencing). Fleshy macroalgal exudates were enriched in the DCNS components fucose (Ochrophyta) and galactose (Rhodophyta); coral and calcareous algal exudates were enriched in total DCNS but in the same component proportions as ambient seawater. Rates of bacterioplankton growth and DOC utilization were significantly higher in algal exudate treatments than in coral exudate and control incubations with each community selectively removing different DCNS components. Coral exudates engendered the smallest shift in overall bacterioplankton community structure, maintained high diversity and enriched taxa from Alphaproteobacteria lineages containing cultured representatives with relatively few virulence factors (VFs) (Hyphomonadaceae and Erythrobacteraceae). In contrast, macroalgal exudates selected for less diverse communities heavily enriched in copiotrophic Gammaproteobacteria lineages containing cultured pathogens with increased VFs (Vibrionaceae and Pseudoalteromonadaceae). Our results demonstrate that algal exudates are enriched in DCNS components, foster rapid growth of bacterioplankton and select for bacterial populations with more potential VFs than coral exudates.

show abstract

“…In fully photosynthetic (autotrophic) organisms, this energy is used for inorganic carbon assimilation. However, carbon fixation activity in AAPs is negligible (Koblížek et al 2003). AAPs seem to possess a photoheterotrophic metabolism, as they require the supply of an organic carbon substrate and light serves only as an additional source of energy.…”

Section: Role Of Aerobic Anoxygenic Phototrophs In the Marine Carbon mentioning

confidence: 99%

Towards a better understanding of microbial carbon flux in the sea*

Gasol¹,

Pinhassi²,

Alonso‐Sáez³

et al. 2008

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

We now have a relatively good idea of how bulk microbial processes shape the cycling of organic matter and nutrients in the sea. The advent of the molecular biology era in microbial ecology has resulted in advanced knowledge about the diversity of marine microorganisms, suggesting that we might have reached a high level of understanding of carbon fluxes in the oceans. However, it is becoming increasingly clear that there are large gaps in the understanding of the role of bacteria in regulating carbon fluxes. These gaps may result from methodological as well as conceptual limitations. For example, should bacterial production be measured in the light? Can bacterial production conversion factors be predicted, and how are they affected by loss of tracers through respiration? Is it true that respiration is relatively constant compared to production? How can accurate measures of bacterial growth efficiency be obtained? In this paper, we discuss whether such questions could (or should) be addressed. Ongoing genome analyses are rapidly widening our understanding of possible metabolic pathways and cellular adaptations used by marine bacteria in their quest for resources and struggle for survival (e.g. utilization of light, acquisition of nutrients, predator avoidance, etc.). Further, analyses of the identity of bacteria using molecular markers (e.g. subgroups of Bacteria and Archaea) combined with activity tracers might bring knowledge to a higher level. Since bacterial growth (and thereby consumption of DOC and inorganic nutrients) is likely regulated differently in different bacteria, it will be critical to learn about the life strategies of the key bacterial species to achieve a comprehensive understanding of bacterial regulation of C fluxes. Finally, some processes known to occur in the microbial food web are hardly ever characterized and are not represented in current food web models. We discuss these issues and offer specific comments and advice for future research agendas.

show abstract

Isolation and characterization of Erythrobacter sp. strains from the upper ocean

Cited by 155 publications

References 31 publications

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea

Coral and macroalgal exudates vary in neutral sugar composition and differentially enrich reef bacterioplankton lineages

Towards a better understanding of microbial carbon flux in the sea*

Contact Info

Product

Resources

About