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ID 28904
file
title alternative
Numerical Fluctuation of Bacteria and Heterotrophic Microflagellates in Hiroshima Bay of the Inland Sea of Japan in Summer 1990
creator
Iwamoto, Noriko
Imai, Ichiro
subject
bacteria
細菌
heterotrophic microflagellates
従属栄養性微小鞭毛虫類
autotrophic nanoplankton
独立栄養性ナノプランクトン
Hiroshima Bay
広島湾
NDC
Zoology
abstract
Numerical fluctuations of bacteria, heterotrophic microflagellates (HMF) and autotrophic nanoplankton (ANP) were investigated at a station in Hiroshima Bay at two days intervals during the period from 18 July to 17 August, 1990. The average density of bacteria and HMF within the water column was highest at the beginning of the investigation, decreased to the end of July, and then was relatively constant. The cyclic oscillation pattern of the population abundance of bacteria and HMF was not found in the present study. The ranges of density observed were 1.16-4.30 x 10^6 cells•ml^<-1> for bacteria (mean: 2.40 x 10^6 cells • ml^<-1>), and 3.27-9.09 x 10^3 cells • ml^<-1> for HMF (mean: 5.07 x 10^3 cells • ml^<-1>). The average numerical and biomass ratios of bacteria to HMF were 481 and 1.08, respectively, which were smaller than the ratios previously reported. This means that HMF occurred more abundantly relative to bacteria in the present study area comparing to other areas. The density of ANP was more fluctuated than that of HMF, ranging from 2.41 x 10^3 to 59.00 x 10^3 cells • ml^<-1> (mean: 12.9 x 103 cells • ml^<-1>).
journal title
日本プランクトン学会報
volume
Volume 40
issue
Issue 1
start page
55
end page
66
date of issued
1993-07
publisher
日本プランクトン学会
issn
0387-8961
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1993 The Plankton Society of Japan
department
Graduate School of Biosphere Science



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