New Zealand Journal of Marine and Freshwater Research abstracts
Three recently recorded Ostreopsis spp. (Dinophyceae) in New
Zealand: temporal and regional distribution in the upper North Island from
1995 to 1997
F. H. CHANG
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 14 901, Kilbirnie
Wellington, New Zealand
email: h.chang@niwa.cri.nz
Y. SHIMIZU
Department of Pharmacognosy
and Environmental Health Sciences
The University of Rhode Island
Kingston, RI 02881
United States
B. HAY
AquaBio Consultants Ltd
P. O. Box 560
Auckland 1, New Zealand
R. STEWART
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 14 901, Kilbirnie
Wellington, New Zealand
G. MACKAY
R. TASKER
National Institute of Water & Atmospheric
Research Ltd
P. O. Box 1043
Whangarei, New Zealand
Abstract Three species of epiphytic
dinoflagellates--
Ostreopsis siamensis,
O. lenticularis, and
O.
ovata have recently been found on both the east and west coasts of the
upper North Island, New Zealand. The morphological differences of all three
Ostreopsis spp. have been studied with both light and scanning electron
microscopes. Detailed studies of the inner face of the thecal wall of
Ostreopsis siamensis revealed two types of trichocyst pores: small,
simple pores and large multipore structures. The multipore structures
apparently have not been previously reported. Surveys conducted during the
period from November 1995 to April 1997 showed that all three
Ostreopsis
spp. were fairly widespread in northern New Zealand, and all three species were
found to occur south of 35deg.S latitude. Cell concentrations of
Ostreopsis spp. in summer were substantially higher than in early
spring. There was also a clear regional difference in distribution; cell
concentrations of the dominant species,
O. siamensis, were greatest in
Rarawa and Tokerau on the north-east coast. Other less abundant epiphytic
species recorded during the same period included
Prorocentrum lima,
P. compressum, and
Coolia monotis. These species were generally
more sporadic in distribution than
Ostreopsis spp.
Keywords epiphytic dinoflagellates; Ostreopsis
siamensis; O. lenticularis; O. ovata; Coolia
monotis; Prorocentrum lima; cell abundance; temporal and regional
distribution
M98061
Received 29 August 1998; accepted 27 September 1999
PDF file of entire paper: medium quality (1983K); (scanned from paper original: notes about this process)
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