An autumn bloom of diatoms of the genus Pseudo-nitzschia H. Peragallo, 1900 in Amursky Bay, the Sea of Japan

Abstract

A bloom of potentially toxic diatoms of the genus Pseudo nitzschia was observed in OctoberNovember 2005 in the northeastern part of Amursky Bay in the vicinity of Vladivostok (northeastern Sea of Japan) at a salinity of 31-33.5‰ and a water temperature of 6-12°C. The most intense peak of Pseudo nitzs chia spp. cell density (with a mean value of 1428.9 thousand cells/liter), which was recorded in the second half of October after heavy rains, was mainly caused by the massive development of P. multistriata (67% of the total density) and P. calliantha (9%). A negative correlation was found between Pseudo nitzschia spp. cell density and water salinity and NH 4 concentration; a positive correlation was observed between diatom pop ulation density and water temperature.

First Report of Domoic Acid Production from Pseudo-nitzschia multistriata in Paracas Bay (Peru)

“…Morphological characteristics have been included by Lim, et al [61] as representative of some species of the Pseudo-nitzschia clade. Thus, morphological characters, 2-4 rows of poroids, the absence of a central nodule and the lower number of fibulae versus striae in 10 µm, were observed in P. multistriata from Japan [62], matching the description of the strain of P. multistriata (IMP-BG 440) from Peru.…”

Relationships between diatoms and tidal environments in Oregon and Washington, USA

“…Sampling season and methodology of sample collection may significantly affect assemblage composition, especially during local or seasonal blooms (e.g., Roe et al 2009). Our samples were collected in spring or autumn (Table A1), periods when diatoms bloom (e.g., Graf et al 1983, Muylaert et al 2000, Villac & Kaczmarska 2011, Stonik et al 2012, probably because temperatures are most favourable for cell division (McIntire 1978, Admiraal & Peletier 1980, Fogg & Bajpai 1988.…”