Epibiotic microorganisms on copepods and other marine crustaceans

Carman, Kevin R.; Dobbs, Fred C.

doi:10.1002/(sici)1097-0029(19970415)37:2<116::aid-jemt2>3.0.co;2-m

Cited by 156 publications

(116 citation statements)

References 104 publications

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“…Copepods are colonised by bacteria, especially around the oral region and the anus as well as the body appendages (Huq et al 1983a), the intersegmental parts (Carman and Dobbs 1997) and the intestine. The nature of this association and also the origin of these bacteria are not well understood until now.…”

Section: Introductionmentioning

confidence: 99%

The microbiome of North Sea copepods

et al. 2013

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Copepods can be associated with different kinds and different numbers of bacteria. This was already shown in the past with culture-dependent microbial methods or microscopy and more recently by using molecular tools. In our present study, we investigated the bacterial community of four frequently occurring copepod species, Acartia sp., Temora longicornis, Centropages sp. and Calanus helgolandicus from Helgoland Roads (North Sea) over a period of 2 years using DGGE (denaturing gradient gel electrophoresis) and subsequent sequencing of 16S-rDNA fragments. To complement the PCR-DGGE analyses, clone libraries of copepod samples from June 2007 to 208 were generated. Based on the DGGE banding patterns of the two years survey, we found no significant differences between the communities of distinct copepod species, nor did we find any seasonality. Overall, we identified 67 phylotypes ([97 % similarity) falling into the bacterial phyla of Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria. The most abundant phylotypes were affiliated to the Alphaproteobacteria. In comparison with PCR-DGGE and clone libraries, phylotypes of the Gammaproteobacteria dominated the clone libraries, whereas Alphaproteobacteria were most abundant in the PCR-DGGE analyses.

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Section: Introductionmentioning

confidence: 99%

The microbiome of North Sea copepods

et al. 2013

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“…The exoskeleton of crustacean copepods constitutes a convenient habitat for a variety of epibiont microorganisms such as bacteria, microalgae and protozoans (Carman & Dobbs 1997;Walkusz & Rolbiecki 2007). Among these organisms, pennate diatoms have been commonly reported growing on different parts of the body of copepods (Carman & Dobbs 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Among these organisms, pennate diatoms have been commonly reported growing on different parts of the body of copepods (Carman & Dobbs 1997). Originally revealed by Giesbrecht (1892) in the Adriatic Sea, epizoic diatoms have since then been recorded in different regions around the world.…”

Section: Introductionmentioning

confidence: 99%

Morphology and distribution of two epizoic diatoms (Bacillariophyta) in Brazil

Fernandes

Calixto-Feres

2012

Acta Bot. Bras.

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Recebido em 20/12/2011. Aceito em 4/07/2012 RESUMO(Morfologia e distribuição de duas diatomáceas (Bacillariophyta) epizóicas no Brasil). As diatomáceas epizóicas em copépodos Pseudohimantidium pacificum e Falcula hyalina foram investigadas em microscopias óptica e eletrônica de varredura, com base em amostras coletadas em diferentes ambientes marinhos da costa brasileira. Pseudohimantidium pacificum é reportada pela primeira vez no Oceano Atlântico Sul Ocidental, ampliando significativamente sua faixa de distribuição geográfica. A espécie ocorreu sobre os copépodos Corycaeus amazonicus e Euterpina acutifrons, e em larvas cypris de Cirripedia. Falcula hyalina utilizou um número maior de hospedeiros, particularmente os copépodos Oithona oswaldocruzii, Pseudodiaptomus richardii e Acartia spp. A morfologia e dados biométricos das valvas de ambas as diatomáceas estiveram dentro dos limites registrados na literatura, incluindo as publicações originais. As duas espécies ocorreram em todas as estações de coleta ao longo da região costeira entre as latitudes 12°S e 28°S. F. hyalina havia sido registrada anteriormente no Oceano Atlântico Sul Ocidental na latitude 31°S.Palavras-chave: epibionte, Pseudohimantidium, Falcula, copépoda, biogeografia ABSTRACT (Morphology and distribution of two epizoic diatoms (Bacillariophyta) in Brazil). The epizoic diatoms Pseudohimantidium pacificum and Falcula hyalina, which live on copepods, were investigated using light and electron microscopes, based on material gathered from different marine environments along the Brazilian coast. Pseudohimantidium pacificum is reported for the first time for the Southwestern Atlantic Ocean, significantly enlarging its range of geographic distribution. This species usually covers the entire body surface of the copepods Corycaeus amazonicus and Euterpina acutifrons, and of cypris larvae of Cirripedia. Falcula hyalina uses a higher number of copepod hosts, particularly Oithona oswaldocruzii, Pseudodiaptomus richardii and Acartia spp. The valve morphology and biometrical data of both diatoms were within the range limits recorded in the literature, including the original publications. Both species occurred in all the sampling stations along the Brazilian coastline stretching from 12°S down to 28°S. Falcula hyalina had already been found as far as latitude 31°S in the Southwestern Atlantic Ocean.

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“…In order to efficiently mitigate the harmful effects of HABs, it is imperative to develop new prevention methods and various control strategies, such as administration of chemical algicides (Churro et al 2010), flocculants (Li and Pan 2013) and biological agents, ultrasonication, as well as other types of physical and chemical manipulation, have been tested in Chinese lakes and coastal areas, and billions of dollars have been invested in the lake rehabilitation programs. Biological agents including bacteria (Bai et al 2011), viruses (Cheng et al 2013), protozoans (Carman and Dobbs 1997), and fungi (Kong et al 2013) may serve as potential algal bloom suppressors. However, these methods either have some potential risks to environmental safety or are not efficient enough to eliminate harmful algae.…”

Section: Introductionmentioning

confidence: 99%

Effects of intermediate metabolite carboxylic acids of TCA cycle on Microcystis with overproduction of phycocyanin

Bai

Dai

Xia

et al. 2014

Environ Sci Pollut Res

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Toxic Microcystis species are the main bloomforming cyanobacteria in freshwaters. It is imperative to develop efficient techniques to control these notorious harmful algal blooms (HABs). Here, we present a simple, efficient, and environmentally safe algicidal way to control Microcystis blooms, by using intermediate carboxylic acids from the tricarboxylic acid (TCA) cycle. The citric acid, alphaketoglutaric acid, succinic acid, fumaric acid, and malic acid all exhibited strong algicidal effects, and particularly succinic acid could cause the rapid lysis of Microcystis in a few hours. It is revealed that the Microcystis-lysing activity of succinic acid and other carboxylic acids was due to their strong acidic activity. Interestingly, the acid-lysed Microcystis cells released large amounts of phycocyanin, about 27-fold higher than those of the control. On the other hand, the transcription of mcyA and mcyD of the microcystin biosynthesis operon was not upregulated by addition of alpha-ketoglutaric acid and other carboxylic acids. Consider the environmental safety of intermediate carboxylic acids. We propose that administration of TCA cycle organic acids may not only provide an algicidal method with high efficiency and environmental safety but also serve as an applicable way to produce and extract phycocyanin from cyanobacterial biomass.

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Epibiotic microorganisms on copepods and other marine crustaceans

Cited by 156 publications

References 104 publications

The microbiome of North Sea copepods

The microbiome of North Sea copepods

Morphology and distribution of two epizoic diatoms (Bacillariophyta) in Brazil

Effects of intermediate metabolite carboxylic acids of TCA cycle on Microcystis with overproduction of phycocyanin

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