English  |  正體中文  |  简体中文  |  Items with full text/Total items : 26987/38787
Visitors : 2288561      Online Users : 50
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41236

Title: Diel patterns of grazing by pigmented nanoflagellateson Synechococcus spp. in the coastal ecosystemof subtropical western Pacific
Authors: Kuo-Ping Chiang
Tsai An-Yi
Wen-Mei Chin
Contributors: 國立臺灣海洋大學:海洋環境化學與生態研究所
Keywords: Mixotrophy
Pigmented nanoflagellates
Synechococcus spp.
Ingestion rates
Date: 2009-12
Issue Date: 2017-02-10T06:56:57Z
Publisher: Hydrobiologia
Abstract: Abstract: Natural populations of planktonic Synechococcus spp. exhibit diel variations in abundance and frequency of dividing cells (FDC) during the warm seasons (>25°C) in coastal water of the western subtropical Pacific ocean. We hypothesized that differences in grazing rates during the day/dark cycle were a major cause of the observed diel variations in Synechococcus spp. abundance. We used fluorescently labeled particles (FLP) as tracers of feeding on Synechococcus spp. in June and August 2007. Our results showed that FDC of Synechococcus spp. were highest at dusk (50%) and lowest (<10%) between midnight and early morning. Synechococcus spp. had three abundance phases, accrual (I), peak (II), and diminished (III). Moreover, FDC values gradually increased in phase I, declined to the lowest values during phase II, and remained at low levels throughout phase III. Our results strongly indicated that pigmented nanoflagellate (PNF) grazing was the underlying biological factor regulating diel variations in Synechococcus spp. abundance. And, the rate of PNF ingestion peaked during the night on smaller non-dividing cells following a peak of Synechococcus spp. abundance in phase II. These findings provide evidence that diel variations in ingestion rates are affected by non-dividing cells of Synechococcus spp. and imply that the impacts of PNF grazing on Synechococcus spp. is based on food selectivity by size.
Relation: 636(1)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41236
Appears in Collections:[海洋環境與生態研究所] 期刊論文

Files in This Item:

File Description SizeFormat
index.html0KbHTML40View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback