ISSN 10630740, Russian Journal of Marine Biology, 2010, Vol. 36, No. 4, pp. 243–251. © Pleiades Publishing, Ltd., 2010.
Original Russian Text © O.G. Shevchenko, T.Yu. Orlova, 2010, published in Biologiya Morya.
Ehrenberg was described by
C. Ehrenberg  in 1844 from plankton samples col
lected in the Antarctic. This is one of the most diverse
and widely distributed genera of marine planktonic
diatoms, containing 175 taxa . In all, 59 species
and intraspecific taxa belonging to the genus
are known for the Sea of Japan ), of which
twenty taxa were reported as dominants of winter,
spring or summer phytoplankton communities .
was described by F. Schütt in 1895 
from the Baltic Sea. Later, in 1914, H. Gran and
K. Yendo  synonymized this species under
, which was described by H.S. Lauder in 1864
 from coastal waters of Hong Kong. The validity of
was restored in 1999 by J.E.B. Rines .
The main differences
between these species were revealed in the details of
the fine structure of the cell using electron microscopy.
The valve shape of
is broadly elliptical to
rounded, flat, while the valve in
strongly compressed and in
it is elliptically shaped, with a central inflation. The
terminal setae of
are proximally bent and
possess a large pore. The intercalary setae of
bear long silica capilli.
Most references of
from the northern
and temperate waters of the world oceans should
mostly likely be assigned to
(see ). In
the Sea of Japan,
is indicated as a bloom
forming species only in a 1934 work of Kiselev .
More recent studies reported that the typical domi
The article was translated by the authors
nant of the autumn phytoplankton “blooms” in Peter
the Great Bay is
The morphology of the
taxa from the
Sea of Japan has been studied relatively well [9–11, 15,
28, 35]. However, special research on the morphology
and ecology of
has not been performed so
far. The study of phytoplankton in Peter the Great Bay
did not reveal the presence of
region. We therefore suppose that literature references
on the distribution of
in the northwest
ern Sea of Japan should be assigned to
In this paper, we present a morphological descrip
using light and electron micros
copy and examine the seasonal and interannual abun
dance patterns of this species in Peter the Great Bay in
the Sea of Japan.
MATERIAL AND METHODS
Material (in all, 418 samples) was collected in
1991–1994, 1996–2000, and 2004–2007 (see table).
Qualitative samples were collected seasonally from 15
stations in Peter the Great Bay, Sea of Japan (Fig. 1),
using a Juday net (mouth diameter 37 cm and capron
net mesh size 20
m). Quantitative phytoplankton
sampling was carried out weekly from January 1996 to
May 1998, and twice a month from October 2004 to
June 2007 at monitoring station 8 in Amursky Bay.
Samples were taken with a 2liter sampling bottle from
depths of 0.5, 2, and 6 m. In 1996–1998, temperature
and salinity were measured at the sampling depths. A
oneliter sample was concentrated by the sedimenta
tion and reverse filtration techniques  and fixed
with an Utermohl solution. The cells were counted in
Morphology and Ecology of the Bloom–Forming Diatom
from Peter the Great Bay, Sea of Japan
O. G. Shevchenko and T. Yu. Orlova
Institute of Marine Biology, Far East Division, Russian Academy of Sciences, Vladivostok, 690041 Russia
Received November 19, 2009
—The morphology of the marine planktonic diatom
Schütt from the Sea of
Japan is described using light and electron microscopy. Because of morphological similarity,
previously synonymized with the close species
Lauder by Gran and Yendo . Abundant
was observed in 1997 in Amursky Bay (Sea of Japan). This species reached a max
imum density of up to 1.3
cells/liter near the water surface in mid May 1997 in the period of watercol
, diatoms, morphology, ecology, Peter the Great Bay, Sea of Japan.