Ostreopsis cf. ovata and Ostreopsis lenticularis (DinophyceaeGonyaulacales) in the Galapagos Marine Reserve

  1. Carnicer, Olga 1
  2. Okolodkov, Yuri B. 2
  3. Garcia-Altares, María 3
  4. Keith, Inti 4
  5. Andree, Karl B. 5
  6. Diogène, Jorge 5
  7. Fernández-Tejedor, Margarita 5
  1. 1 Escuela de Gestión Ambiental, Pontificia Universidad Católica del Ecuador, Sede Esmeraldas (PUCESE)
  2. 2 Laboratorio de Botánica Marina y Planctología, Instituto de Ciencias Marinas y Pesquerías, Universidad Veracruzana (ICIMAP-UV)
  3. 3 Leibniz Institute for Natural Product Research and Infection Biology
  4. 4 Charles Darwin Research Station, Charles Darwin Foundation
  5. 5 Institut de Recerca i Tecnologia Agroalimentària (IRTA)
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Revista:
Scientia Marina

ISSN: 0214-8358

Año de publicación: 2020

Volumen: 84

Número: 3

Páginas: 1-15

Tipo: Artículo

DOI: 10.3989/SCIMAR.05035.08A DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Scientia Marina

Resumen

El género de los dinoflagelados bentónicos Ostreopsis es de particular interés, porque algunas especies afectan negativamente a la salud humana y a los ecosistemas marinos costeros. Las poblaciones de Ostreopsis en áreas remotas, como la Reserva Marina de Galápagos con su biodiversidad única, pueden proporcionar datos significativos a su estudio. Se recolectaron muestras de dinoflagelados epibentónicos de dos islas (Santa Cruz y Santa Fé) en 2017. Se encontraron espe­cies de los géneros Gambierdiscus, Amphidinium, Coolia y Ostreopsis. Las cepas de Ostreopsis se aislaron para caracterizar su morfología, biología molecular y toxicidad. Se distinguieron tres morfotipos diferentes de Ostreopsis basados en tamaño (n=369). El morfotipo de células pequeñas fue dominante en diez muestras, con abundancias de hasta 33405 células g–1 de peso fresco de macroalgas. Se aisló un total de 16 cepas y se secuenciaron las regiones de rDNA, 5.8S y ITS para el estudio filogenético. Trece cepas pertenecieron al morfotipo de células pequeñas agrupadas en el clado O. cf. ovata Atlántico/Índio/Pacífico y tres cepas al morfotipo de células grandes agrupadas en el clado Ostreopsis lenticularis. Ninguna de las cepas aisladas resultó ser tóxica. La presencia de estos géneros/especies representa una amenaza potencial para los ecosistemas marinos, por lo que es importante tener en cuenta las especies bentónicas en la vigilancia de la proliferación de algas nocivas en la reserva.

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The authors would like to thank Josselyn B. Yépez Rendón (Esmeraldas, Ecuador) for her help in field work, Àngels Tudó (Institut de Recerca i Tecnologia Agroalimentària, IRTA, Sant Carles de la Ràpita, Spain) for her assistance in data analysis, and Marcia M. Gowing (University of California at Santa Cruz, California, USA) for improving the English style. The two anonymous reviewers are thanked for their valuable comments. This work was funded by the Pontifical Catholic University of Ecuador - Sede Esmeraldas through the internal project “Characterization of the epibenthic and phytoplanktonic microalgae community in the Galapagos Islands”. IK thanks Danny Rueda and the Galapagos National Park for granting us authorization to carry out this investigation (research permit number: PC-15–19). Additionally, IK would like to thank Galapagos Conservancy, Lindblad Expedition/ National Geographic Fund, Galapagos Conservation Trust, Paul M. Angell Foundation and Ecoventura for research funding provided for the CDF marine invasive species program. This publication is contribution number 2332 of the Charles Darwin Foundation for the Galapagos Islands.

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