The distribution of the role of protozoa (flagellates) in lakes.

湖泊中原生动物（鞭毛虫）的分布作用。

基本信息

批准号：
06640828
负责人：
TAKAMURA Noriko
金额：
$ 1.02万
依托单位：
NATIONAL INSTITTE FOR ENVIRONMENTAL STUDIES (NIES)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06640828/
关键词：
LAKES MICROBIRK FOOD CHAIN PIOOPLANKTON FLAGELLATES CILIATES TOP-DOWN DISTRIBUTION BOTTOM-UP Microbial food web nanoflagellates picoplankton lake 鞭毛藻栄養レベル

项目摘要

Relationships of bacterial, picocyanobacterial, eucaryotic picoplankton, nanoflagellate and ciliate abundances to each other and to chlorophyll a (Chl. a), total phosphorus (TP), total nitrogen (TN) and TN : TP ratio in 31 epilimnetic waters during the warm season were investigated. The abundances of bacteria and ciliates were postitively correlated with TP,TN and Chl. a, and negatively with TN : TP ratio. Linear regressions on TP and Chl. a accounted for 51% and 34% of the variability in bacterial and ciliate abundances, respectively. The abundance of heterotrophic nanoflagellates was not correlated with that of bacteria.Polyurethane foam units (PFU) were set in the epilimnion of 15 Japanese waters and protozoan species (phytomastigophora, zoomastigophora, sarcodina and ciliata) in the squeezed water from the PFU were recorded through a high-definition (HD) TV monitor (Chu-ou mushen THMC-21BH/CH), which was connected with a HD video camera system (Nikon HQ-130C and PA-160) and the microscope (Olympus BH2) . The fauna of the protozoa in Japanese lakes was reported for first time by the present study.The effects of silver carp on plankton communities were investigated with 6 enclosres set in Lake Kasumigaura. The 9% of the variability in heterotrophic nannofiagellate (HNF) abundance was accounted by both cladoceran (top-down effect) and bacteria (bottom-up effect) abundanes. Picocyanobacteria abundanec did not account for the variability in HNF abundance, although it is well known that HNF feeds on picocyanobacteria as well asbacteria. The variability in autotrophic flagellate abundance was closedly related with both the fish density and the dissolved inorgenic nitrogen amount.

细菌，果科细菌，念珠菌上皮兰克顿，纳米氟酸酯和纤毛丰度彼此之间的关系，叶绿素A（Chl。A），总磷（TP），总氮（TN）和TN：TP在31次热季节期间经过31个情感水平的季节。细菌和纤毛的丰度与TP，TN和CHL相关。 a，并带有TN：TP比率。 TP和CHL上的线性回归。一个分别占细菌和纤毛丰度变化的51％和34％。在15种日本水域和原生动物物种（phytomastigophora，Zoomastigophora，yoomastigophora，sarcodina and ciliatina watriention prodientia from pcieliatina watriention frows presie of sogeeeee s presieemnimnion中），将非营养性纳米鞭毛的丰度与细菌无关。（HD）电视显示器（Chu-Ou Mushen THMC-21BH/CH），它与HD摄像机系统（Nikon HQ-130C和PA-160）和显微镜（Olympus BH2）连接。本研究首次据报道，日本湖泊原生动物的动物动物动物动物动物群是对浮游生物社区的影响，研究了卡苏米古拉湖的6个席位。 Cladoceran（自上而下的效应）和细菌（自下而上效应）的杂型纳诺省（HNF）丰度的变异性的9％。阿布达尼克（Abundanec）上皮基氨基菌都没有说明HNF丰度的可变性，尽管众所周知，HNF也以皮基氨基杆菌为食，也以asbacteria为食。自养鞭毛丰度的变异性与鱼的密度和溶解的非基因氮量封闭。