Accessible Requires Authentication Published by De Gruyter July 5, 2013

The genus Pseudo-nitzschia (Bacillariophyceae) in Manzanillo and Santiago Bays, Colima, Mexico

María Rivera-Vilarelle, Sonia Quijano-Scheggia, Aramis Olivos-Ortiz, Juan Heberto Gaviño-Rodríguez, Fátima Castro-Ochoa and Alejandro Reyes-Herrera
From the journal Botanica Marina


In this study, morphological characters were used to describe the diversity and seasonal variability of the genus Pseudo-nitzschia in a coastal region of the Mexican tropical Pacific Ocean. Eleven species were characterized from cultures and field material: Pseudo-nitzschia americana, Pseudo-nitzschia australis, Pseudo-nitzschia brasiliana, Pseudo-nitzschia delicatissima, Pseudo-nitzschia cf. delicatissima, Pseudo-nitzschia dolorosa, Pseudo-nitzschia cf. fryxelliana, Pseudo-nitzschia micropora, Pseudo-nitzschia multistriata, Pseudo-nitzschia pungens var. aveirensis, and Pseudo-nitzschia subfraudulenta. The maximum diversity and abundance occurred in spring, in parallel with a local upwelling, whereas fewer species were detected in autumn. Among those analyzed, the only species to be detected throughout the year at several stations was P. cf. fryxelliana, whereas the rarest species in the study area was P. americana, which was detected only in the spring.

Corresponding author: María Rivera-Vilarelle, Facultad de Ciencias Marinas, Colima University, Carretera Manzanillo-Barra de Navidad km 20, Col. El Naranjo, C.P. 28860, Manzanillo, Colima, Mexico

We thank J. Reyes Gomez and D. Pozas Zepeda for the microphotography and assistance with the SEM. We also thank the University of Colima for the use of its equipment and facilities and an anonymous reviewer for comments to improve the manuscript. This study was supported by PROMEP/103.5/10/7144 and the project FOMIX COLIMA-2009-C04-122077.


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Received: 2012-7-6
Accepted: 2013-6-4
Published Online: 2013-07-05
Published in Print: 2013-08-01

©2013 by Walter de Gruyter Berlin Boston