Coral larvae: From gametes to recruits

Gleason, Daniel F.; Hofmann, D. K.

doi:10.1016/j.jembe.2011.07.025

Cited by 112 publications

(101 citation statements)

References 161 publications

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“…Both of the CCA species that have been shown to be avoided by coral larvae, P. solubile and P. pachydermum, have high abundances of bacteria that are closely related to known coral pathogens (Vibrios and Rhodobacteraceae) or cyanobacteria that are known to produce allelopathic compounds (Oscillatoriales). Coral larvae respond to a variety of physical and chemical cues (Gleason and Hofmann, 2011) during the settlement process including the presence of bacterial biofilms and specific bacterial strains within biofilms (Negri et al, 2001;Tran and Hadfield, 2011;Sneed et al, 2014). Gleason and Hofmann (2011) proposed a 'hierarchy of action' in which coral larvae hone in on a settlement location through a series of cues that function at increasingly smaller spatial scales.…”

Section: Discussionmentioning

confidence: 99%

“…Coral larvae respond to a variety of physical and chemical cues (Gleason and Hofmann, 2011) during the settlement process including the presence of bacterial biofilms and specific bacterial strains within biofilms (Negri et al, 2001;Tran and Hadfield, 2011;Sneed et al, 2014). Gleason and Hofmann (2011) proposed a 'hierarchy of action' in which coral larvae hone in on a settlement location through a series of cues that function at increasingly smaller spatial scales. It is possible that coral larvae may be able to assess the suitability of substrata for settlement at a fine scale (within a reef) based on the bacterial communities on the surface of the preferred CCA.…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Crustose coralline algal species host distinct bacterial assemblages on their surfaces

2015

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“…Similar to other invertebrates, coral larvae are able to discriminate among settlement locations by responding to a variety of physical and chemical factors (see reviews [7][8][9]). The exact nature of the cues that induce coral larval settlement is still not completely understood.…”

Section: Introductionmentioning

confidence: 99%

The chemical cue tetrabromopyrrole from a biofilm bacterium induces settlement of multiple Caribbean corals

et al. 2014

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Microbial biofilms induce larval settlement for some invertebrates, including corals; however, the chemical cues involved have rarely been identified. Here, we demonstrate the role of microbial biofilms in inducing larval settlement with the Caribbean coral Porites astreoides and report the first instance of a chemical cue isolated from a marine biofilm bacterium that induces complete settlement (attachment and metamorphosis) of Caribbean coral larvae. Larvae settled in response to natural biofilms, and the response was eliminated when biofilms were treated with antibiotics. A similar settlement response was elicited by monospecific biofilms of a single bacterial strain, Pseudoalteromonas sp. PS5, isolated from the surface biofilm of a crustose coralline alga. The activity of Pseudoalteromonas sp. PS5 was attributed to the production of a single compound, tetrabromopyrrole (TBP), which has been shown previously to induce metamorphosis without attachment in Pacific acroporid corals. In addition to inducing settlement of brooded larvae (P. astreoides), TBP also induced larval settlement for two broadcastspawning species, Orbicella (formerly Montastraea) franksi and Acropora palmata, indicating that this compound may have widespread importance among Caribbean coral species.

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“…All reefs with increased International Journal of Ecology 7 nutrient levels in the present study showed low coral recruit densities, possibly indicating the negative impact of nutrient on coral reproductive capacity and recruitment. Furthermore, the interference of sediments with coral spawning, sperm entry into eggs, embryogenesis, and larval development [53,62] has also been implicated in controlling coral recruitment success. Moreover, elevated sediment levels also increase settlement on exposed surfaces or in cryptic habitats where survival and growth are highly compromised [53].…”

Section: Discussionmentioning

confidence: 99%

Coral Recruit-Algae Interactions in Coral Reef Lagoons Are Mediated by Riverine Influences

Mwachireya

Nzioka

Mutiso

2017

International Journal of Ecology

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Coral recruit and algae abundance and diversity were studied in Kenyan reefs to determine the influence of terrestrial discharge (nutrients and sediments) and the recovery potential of coral reefs after disturbances. Reefs affected by sediments and nutrients were found to have high total, turf, and macroalgae but reduced coralline algae abundance and coral recruit density. Interestingly, this response was found to be the greatest in reefs close to nutrient sources relative to "pristine" reefs and those affected simultaneously by sediments and nutrients. Further, enhanced levels of brown algae and pocilloporid recruits were observed in reefs affected by terrestrial run-off whereas acroporid recruit, coralline, and calcareous algae abundance was high in reefs under low terrestrial input. Our results show that whereas increased sediment levels negatively affect coral recruit density individually, their interaction with nutrients improves recruit density in reefs simultaneously affected by sediment and nutrients. These findings suggest that the assessment of local factors that enhance inhibitory and those that suppress promotional processes involved in coral settlement and recruitment is an important aspect to consider in the conservation and management of coral reefs in the face of local anthropogenic stress as well as future climate disturbance dynamics and their interaction.

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Coral larvae: From gametes to recruits

Cited by 112 publications

References 161 publications

Crustose coralline algal species host distinct bacterial assemblages on their surfaces

Crustose coralline algal species host distinct bacterial assemblages on their surfaces

The chemical cue tetrabromopyrrole from a biofilm bacterium induces settlement of multiple Caribbean corals

Coral Recruit-Algae Interactions in Coral Reef Lagoons Are Mediated by Riverine Influences

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