Marine chemical ecology in benthic environments

Puglisi, Melany P.; Sneed, Jennifer M.; Ritson‐Williams, Raphael; Young, Ryan M.

doi:10.1039/c8np00061a

Cited by 76 publications

(59 citation statements)

References 80 publications

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“…Entotheonella serta” is a source of natural products in chemically distinct sponges T. swinhoei WA and WB (white interior) –. It is likely that many natural products of “Entotheonella” are involved in host defense, which is a role often suspected or shown for toxic compounds of sessile invertebrates …”

Section: Introductionmentioning

confidence: 99%

Characterization of an Orphan Type III Polyketide Synthase Conserved in Uncultivated “Entotheonella” Sponge Symbionts

Reiter

Cahn²,

Wiebach³

et al. 2019

ChemBioChem

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Uncultivated bacterial symbionts from the candidate genus “Entotheonella” have been shown to produce diverse natural products previously attributed to their sponge hosts. In addition to these known compounds, “Entotheonella” genomes contain rich sets of biosynthetic gene clusters that lack identified natural products. Among these is a small type III polyketide synthase (PKS) cluster, one of only three clusters present in all known “Entotheonella” genomes. This conserved “Entotheonella” PKS (cep) cluster encodes the type III PKS CepA and the putative methyltransferase CepB. Herein, the characterization of CepA as an enzyme involved in phenolic lipid biosynthesis is reported. In vitro analysis showed a specificity for alkyl starter substrates and the production of tri‐ and tetraketide pyrones and tetraketide resorcinols. The conserved distribution of the cep cluster suggests an important role for the phenolic lipid polyketides produced in “Entotheonella” variants.

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Section: Introductionmentioning

confidence: 99%

Characterization of an Orphan Type III Polyketide Synthase Conserved in Uncultivated “Entotheonella” Sponge Symbionts

Reiter

Cahn²,

Wiebach³

et al. 2019

ChemBioChem

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“…Benthic species, particularly corals, are highly competitive [60] and have been classified based on their aggressiveness [61][62][63][64]. Corals compete either by direct physical contact or via the production and secretion of secondary metabolites that can weaken or kill neighboring organisms [65][66][67][68][69][70]. These metabolites are produced by the coral host itself or by their associated microorganisms, some of which are known to synthetize toxic compounds [67,71].…”

Section: The Composition Of Benthic Species Assemblages Influences Thmentioning

confidence: 99%

Metabarcoding reveals distinct microbiotypes in the giant clam Tridacna maxima

et al. 2020

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Background: Giant clams and scleractinian (reef-building) corals are keystone species of coral reef ecosystems. The basis of their ecological success is a complex and fine-tuned symbiotic relationship with microbes. While the effect of environmental change on the composition of the coral microbiome has been heavily studied, we know very little about the composition and sensitivity of the microbiome associated with clams. Here, we explore the influence of increasing temperature on the microbial community (bacteria and dinoflagellates from the family Symbiodiniaceae) harbored by giant clams, maintained either in isolation or exposed to other reef species. We created artificial benthic assemblages using two coral species (Pocillopora damicornis and Acropora cytherea) and one giant clam species (Tridacna maxima) and studied the microbial community in the latter using metagenomics. Results: Our results led to three major conclusions. First, the health status of giant clams depended on the composition of the benthic species assemblages. Second, we discovered distinct microbiotypes in the studied T. maxima population, one of which was disproportionately dominated by Vibrionaceae and directly linked to clam mortality. Third, neither the increase in water temperature nor the composition of the benthic assemblage had a significant effect on the composition of the Symbiodiniaceae and bacterial communities of T. maxima. Conclusions: Altogether, our results suggest that at least three microbiotypes naturally exist in the studied clam populations, regardless of water temperature. These microbiotypes plausibly provide similar functions to the clam host via alternate molecular pathways as well as microbiotype-specific functions. This redundancy in functions among microbiotypes together with their specificities provides hope that giant clam populations can tolerate some levels of environmental variation such as increased temperature. Importantly, the composition of the benthic assemblage could make clams susceptible to infections by Vibrionaceae, especially when water temperature increases.

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“…The most recent research has shown the inhibition of marine biofouling by different types of bacteria, cyanobacteria, and marine fungi. Recent experiments have shown the antifouling properties of some organic compounds [72,73], marine larvae of epibiotic bacteria [74][75][76], and various natural chemical compounds [77]. Dobretsov et al [78] studied the microbial interference as a mechanism to control marine biofilms, focusing on the mechanisms of altering the biofilm by bacteria, algae, and various larvae.…”

Section: Biological Treatments Antifoulingmentioning

confidence: 99%

Fouling in Heat Exchangers

García¹,

Trueba²

2020

Inverse Heat Conduction and Heat Exchangers

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A major problem in industries that use heat exchanger equipment cooled with water in their industrial processes is biofouling. In the design and operation of heat exchangers cooled with water, a coefficient of biological must be considered, which affects the efficiency of the equipment. For this reason, it is necessary to apply appropriate antifouling treatments to the design of each heat exchanger. In order to minimize the undesirable phenomenon of biofouling, various mitigation methods have been developed over the last 30 years, both online and offline, of a physical, chemical, or biological nature. Most of these methods are well contrasted and are applied in the regular operation of the facilities, although some methodology approaches are in the research and development phase. However, the application of most of these methods requires interrupting the production, periodically, in order to clean the biofouling, seriously damaging the performance and operation of the installation. The "online" methods to biofouling control are chemical (oxidizing, and non-oxidants), biological and physical treatments. Nowadays, other methodologies of biofouling mitigation that do not affect the environment are being investigated, although, until now, none have been found that are substitutes for chemical agents and that have the same or with higher efficiency.

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Marine chemical ecology in benthic environments

Abstract: This review highlights the 2013–2015 marine chemical ecology literature for benthic bacteria and cyanobacteria, macroalgae, sponges, cnidarians, molluscs, other benthic invertebrates, and fish.

Cited by 76 publications

References 80 publications

Characterization of an Orphan Type III Polyketide Synthase Conserved in Uncultivated “Entotheonella” Sponge Symbionts

Characterization of an Orphan Type III Polyketide Synthase Conserved in Uncultivated “Entotheonella” Sponge Symbionts

Metabarcoding reveals distinct microbiotypes in the giant clam Tridacna maxima

Fouling in Heat Exchangers

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