Algicidal bacteria associated with blooms of a toxic dinoflagellate in a temperate Australian estuary

Skerratt, Jennifer; Bowman, John P.; Hallegraeff, Gustaaf M.; James, S. R.; Nichols, Peter D.

doi:10.3354/meps244001

Cited by 146 publications

(115 citation statements)

References 56 publications

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“…Complex relationships between bacteria and algae have been proposed to influence the development and termination of harmful algal blooms (HABs; Doucette 1995, Skerratt et al 2002. These bacterial-algal interactions can be inhibitory or stimulatory as reported by Fukami et al (1991), who observed that the native microbial community associated with Gymnodinium (= Karenia) mikimotoi was able to stimulate the growth of this dinoflagellate while inhibiting the growth of a potentially co-occurring diatom, Skeletonema costatum.…”

Section: Introductionmentioning

confidence: 99%

Influence of microbial interactions on the susceptibility of Karenia spp. to algicidal bacteria

Roth¹,

Mikulski²,

Doucette³

2008

Aquat. Microb. Ecol.

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A bacterial strain (D38BY) belonging to the family Flavobacteriaceae and antagonistic towards an algicidal bacterium (strain S03; Flavobacteriaceae) was isolated from a culture of the red tide dinoflagellate Karenia brevis that had previously been characterized as resistant to attack by strain S03. This antagonistic bacterium increased the survival time of otherwise susceptible, bacteriafree K. brevis cultures in a concentration-dependent manner during exposure to the algicidal bacterium. Experimental evidence indicated that direct contact was required in order for strain D38BY to inhibit the killing activity of algicidal strain S03. While further work is needed to determine its precise mode of action, the antagonistic properties of strain D38BY provide further evidence that the resistance or susceptibility of certain algal taxa to algicidal attack can be more a function of interactions within the ambient microbial community than an intrinsic property of the alga. KEY WORDS: Algicidal bacteria · Antagonism · CFB complex · Karenia brevis · Microbial interactions Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 50: [251][252][253][254][255][256][257][258][259] 2008 Previous studies have shown that bacteria in contact with organic matter have a greater tendency to inhibit the growth of other bacteria (Nair & Simidu 1987, Burgess et al. 1999. Long & Azam (2001) reported that the number of bacterial strains inhibited by attached bacteria was approximately 3 times higher than those adversely affected by free-living bacteria. Grossart et al. (2004) found that over 50% of strains isolated from marine aggregates were capable of inhibiting at least 1 other bacterium. Although these studies highlight the contributions of attached bacteria, free-living microbes also warrant consideration. Mayali & Doucette (2002) showed that resistance and susceptibility to an algicidal bacterium could be transferred among cultures of the red tide dinoflagellate Karenia brevis simply by exchanging the native freeliving microbial communities associated with susceptible and resistant isolates. Their findings implicated interactions among bacteria as a potential mechanism for modulating the killing activity of algicidal strains. The ecological significance of antagonistic or inhibitory interactions between bacteria remains largely speculative. Nonetheless, such interactions could influence competition for nutrients or space (Holmström & Kjelleberg 1999) and lead to changes in microbial species composition that may, in turn, alter the nature and rates of bacterially-mediated carbon cycling (Martinez et al. 1996, Long et al. 2003. A better understanding of these relationships and knowledge of the key species involved are essential for predicting their impacts on marine ecosystems. Our goal was to isolate and characterize the antagonistic microbial component(s) of a Karenia brevis culture responsible for impeding the killing activity of an algicidal bacterium reported as lethal to other ...

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Section: Introductionmentioning

confidence: 99%

Influence of microbial interactions on the susceptibility of Karenia spp. to algicidal bacteria

Roth¹,

Mikulski²,

Doucette³

2008

Aquat. Microb. Ecol.

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“…and Thalassobius aestuarii were key factors that caused the lysis (Wang et al, 2010c). Many bacterial isolates have been proved to have the capability to kill microalgae (algicidal activity) by different ways (Amaro et al, 2005;Lovejoy et al, 1998;Simon et al, 2002;Skerratt et al, 2002). Certain algicidal bacterial strains (e.g.…”

Section: Lysis/killing Of Microalgae By Algicidal Bacteriamentioning

confidence: 99%

Effects of bacterial communities on biofuel-producing microalgae: stimulation, inhibition and harvesting

Wang

Hill

Zheng

et al. 2014

Critical Reviews in Biotechnology

104

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Despite the great interest in microalgae as a potential source of biofuel to substitute for fossil fuels, little information is available on the effects of bacterial symbionts in mass algal cultivation systems. The bacterial communities associated with microalgae are a crucial factor in the process of microalgal biomass and lipid production and may stimulate or inhibit growth of biofuel-producing microalgae. In addition, we discuss here the potential use of bacteria to harvest biofuel-producing microalgae. We propose that aggregation of microalgae by bacteria to achieve 490% reductions in volume followed by centrifugation could be an economic approach for harvesting of biofuel-producing microalgae. Our aims in this review are to promote understanding of the effects of bacterial communities on microalgae and draw attention to the importance of this topic in the microalgal biofuel field.

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“…Planomicrobium spp. have been isolated from diverse marine environments and exhibit algicidal and antimicrobial activity (Skerratt et al, 2002). Members of this genus isolated from coral mucus reduced growth and biofilm formation of coral pathogens (Skerratt et al, 2002;Shnit-Orland and Kushmaro, 2009;Alagely et al, 2011).…”

Section: Interspecies Variability: Compositionmentioning

confidence: 99%

“…have been isolated from diverse marine environments and exhibit algicidal and antimicrobial activity (Skerratt et al, 2002). Members of this genus isolated from coral mucus reduced growth and biofilm formation of coral pathogens (Skerratt et al, 2002;Shnit-Orland and Kushmaro, 2009;Alagely et al, 2011). T. prototypum also had higher abundances than other CCA of an OTU (6908) in the order Rhodobacterales (2.26 ± 3.67%) that aligned weakly (88.6%) to species of Rhodobacteraceae and an OTU (8276) in the order Planctomycetales (1.93 ± 1.47%) that aligned weakly (87.7%) to Blastopirellula spp.…”

Section: Interspecies Variability: Compositionmentioning

confidence: 99%

Crustose coralline algal species host distinct bacterial assemblages on their surfaces

2015

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Crustose coralline algae (CCA) are important components of many marine ecosystems. They aid in reef accretion and stabilization, create habitat for other organisms, contribute to carbon sequestration and are important settlement substrata for a number of marine invertebrates. Despite their ecological importance, little is known about the bacterial communities associated with CCA or whether differences in bacterial assemblages may have ecological implications. This study examined the bacterial communities on four different species of CCA collected in Belize using bacterial tagencoded FLX amplicon pyrosequencing of the V1-V3 region of the 16S rDNA. CCA were dominated by Alphaproteobacteria, Gammaproteobacteria and Actinomycetes. At the operational taxonomic unit (OTU) level, each CCA species had a unique bacterial community that was significantly different from all other CCA species. Hydrolithon boergesenii and Titanoderma prototypum, CCA species that facilitate larval settlement in multiple corals, had higher abundances of OTUs related to bacteria that inhibit the growth and/or biofilm formation of coral pathogens. Fewer coral larvae settle on the surfaces of Paragoniolithon solubile and Porolithon pachydermum. These CCA species had higher abundances of OTUs related to known coral pathogens and cyanobacteria. Coral larvae may be able to use the observed differences in bacterial community composition on CCA species to assess the suitability of these substrata for settlement and selectively settle on CCA species that contain beneficial bacteria.

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Algicidal bacteria associated with blooms of a toxic dinoflagellate in a temperate Australian estuary

Cited by 146 publications

References 56 publications

Influence of microbial interactions on the susceptibility of Karenia spp. to algicidal bacteria

Influence of microbial interactions on the susceptibility of Karenia spp. to algicidal bacteria

Effects of bacterial communities on biofuel-producing microalgae: stimulation, inhibition and harvesting

Crustose coralline algal species host distinct bacterial assemblages on their surfaces

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