Epibiotic Diatoms Are Universally Present on All Sea Turtle Species

Robinson, Nathan J.; Majewska, Roksana; Lazo-Wasem, Eric A.; Paladino, Frank V.; Rojas, Lourdes; Zardus, John D.; Pinou, Theodora

doi:10.1371/journal.pone.0157011

Cited by 48 publications

(54 citation statements)

References 18 publications

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“…Another method suggestively having great potential for studying turtle behavior is to study the epibiota on shell turtles. Most of these studies have focused on macro-epibiota but, since the 70s (e.g., [ 21 – 25 ]), micro-epibiota has also received attention and is now the subject of growing interest given the diversity of organisms that live on(e.g., [ 26 – 28 ]). Among the micro-epibiotic organisms, diatoms (Bacillariophyta) receive the most attention because of their diversity and density on turtle shells [ 29 – 31 ].…”

Section: Introductionmentioning

confidence: 99%

DNA metabarcoding and microscopic analyses of sea turtles biofilms: Complementary to understand turtle behavior

et al. 2018

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Sea turtles are distributed in tropical and subtropical seas worldwide. They play several ecological roles and are considered important indicators of the health of marine ecosystems. Studying epibiotic diatoms living on turtle shells suggestively has great potential in the study of turtle behavior because diatoms are always there. However, diatom identification at the species level is time consuming, requires well-trained specialists, and there is a high probability of finding new taxa growing on turtle shells, which makes identification tricky. An alternative approach based on DNA barcoding and high throughput sequencing (HTS), metabarcoding, has been developed in recent years to identify species at the community level by using a DNA reference library. The suitabilities of morphological and molecular approaches were compared. Diatom assemblages were sampled from seven juvenile green turtles (Chelonia mydas) from Mayotte Island, France. The structures of the epibiotic diatom assemblages differed between both approaches. This resulted in different clustering of the turtles based on their diatom communities. Metabarcoding allowed better discrimination between turtles based on their epibiotic diatom assemblages and put into evidence the presence of a cryptic diatom diversity. Microscopy, for its part, provided more ecological information of sea turtles based on historical bibliographical data and the abundances of ecological guilds of the diatom species present in the samples. This study shows the complementary nature of these two methods for studying turtle behavior.

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Section: Introductionmentioning

confidence: 99%

DNA metabarcoding and microscopic analyses of sea turtles biofilms: Complementary to understand turtle behavior

et al. 2018

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“…from a leatherback turtle in Robinson et al (2016, fig. 2-D), with an internal narrow transapical structure with lateral triangular wing-shaped expansions, and valvocopulae showing apices with a double row of puncta, may be similar to our new taxon.…”

Section: Taxonomic Notesmentioning

confidence: 99%

“…As reported by Wetzel et al (2012), bRaDy (2010) also found an unidentified Epiphalaina or Tursiocola species on several species of marine turtles from the Gulf of Mexico. Recently, Robinson et al (2016) Scrapings from several juvenile Chelonia mydas linnaeus (green turtle) from the Lesser Antilles (Eastern Caribbean) and adults from French Guiana allowed for the description of two additional species that can be assigned to Tursiocola due to their characteristic internal structure. Differences with the eight previously described Tursiocola species are discussed here.…”

Section: Introductionmentioning

confidence: 99%

Two new Tursiocola species (Bacillariophyta) epizoic on green turtles (Chelonia mydas) in French Guiana and Eastern Caribbean

Riaux-Gobin¹,

Witkowski²,

Chevallier³

et al. 2017

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Abstract:Scrapings from several juvenile Chelonia mydas linnaeus (green turtle) from Eastern Caribbean and adults from French Guiana allowed for the description of two small and relatively rare epizoic Tursiocola species (Bacillariophyta). Differences with the other eight Tursiocola species previously described are discussed here. Particular attention is given to the cingulum of the two new species and a conceptual key is proposed for Tursiocola species, based on the cingulum structure.

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“…minor se ha aislado desde aguas superficiales de la Antártida (Cefarelli et al, 2016). Especies como Achnanthes sp., se aislaron desde biopelículas del caparazón de tortugas marinas (Robinson et al, 2016). Por otro lado, estudios de Suresh et al, (2016) discuten que Achnanthes sp., es una microalga que induce el asentamiento de macroorganismos, al observar que su presencia en sustrato indujo el asentamiento del poliqueto Hydroides elegans.…”

Section: Tetraselmis Marina) (Tabla 1) En Otros Trabajos Bacillariounclassified

Bacillus pumilus Marinos Inhibidores de la Fijación de Microalgas a Sustratos Artificiales

et al. 2017

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* Autor a quien debe ser dirigida la correspondenciaRecibido Sep. 5, 2016; Aceptado Oct. 3, 2016; Versión final Nov. 11, 2016, Publicado Abr. 2017 Resumen Se evalúa la inhibición de la fijación microalgal en sustratos artificiales, previamente colonizado con bacterias marinas. Debido a la escasez de agua, la región de Antofagasta en Chile desarrolla la desalinización del agua de mar para sus procesos mineros. La carga biológica del agua de mar genera bioincrustaciones que obstruyen los sistemas de flujo. Las bioincrustaciones se inician con la fijación inicial de moléculas y microorganismos como bacterias y microalgas, los cuales sirven de sustrato y alimento para otros colonizadores. Dos cepas de Bacillus pumilus inhibieron la adherencia de mezclas microalgales, demostrando que estarían secretando metabolitos inhibidores de la fijación. Por lo tanto se concluye que es viable utilizar bacterias marinas como B. pumilus para inhibir la fijación inicial a sustratos artificiales como PVC, de microalgas nativas de las costas del norte de Chile. Palabras claves: bioincrustación; Bacillus pumilus; inhibición; microalga; desalinización Marine Bacillus pumilus Inhibitors of the Fixation of Microalgae to Artificial Substrates AbstractThe inhibition of microalgal fixation in artificial substrates, previously colonized with marine bacteria is evaluated. Due to the shortage of water, the region of Antofagasta in Chile develops desalination of seawater for its mining processes. The Bioburden of the seawater generates biofouling and obstructing of the flow systems. Biofouling start with the initial attachment of molecules and microorganisms like bacteria and microalgae, which serve as substrate and food for other colonists. Two strains of Bacillus pumilus inhibited adhesion of microalgal mix, showing that they produce metabolites that inhibits fixation. It is therefore concluded that it is feasible to use of the marine bacteria B. pumilus to inhibit the initial fixation to artificial substrates such as PVC, of native microalgae the coasts of northern Chile.

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Epibiotic Diatoms Are Universally Present on All Sea Turtle Species

Cited by 48 publications

References 18 publications

DNA metabarcoding and microscopic analyses of sea turtles biofilms: Complementary to understand turtle behavior

DNA metabarcoding and microscopic analyses of sea turtles biofilms: Complementary to understand turtle behavior

Two new Tursiocola species (Bacillariophyta) epizoic on green turtles (Chelonia mydas) in French Guiana and Eastern Caribbean

Bacillus pumilus Marinos Inhibidores de la Fijación de Microalgas a Sustratos Artificiales

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