English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Dynamics of bacteria and mixotrophic flagellates in an Alpine lake in relation to Daphnia population development

Callieri, C., Bertoni, R., & Corno, G. (2002). Dynamics of bacteria and mixotrophic flagellates in an Alpine lake in relation to Daphnia population development. Journal of Limnology, 61(2), 177-182.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-DDB3-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-DDB4-F
Genre: Journal Article

Files

show Files
hide Files
:
Callieri_2002.pdf (Publisher version), 211KB
 
File Permalink:
-
Name:
Callieri_2002.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Evolutionary Biology, MPLM; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Callieri, Cristiana, Author
Bertoni, Roberto, Author
Corno, Gianluca1, Author              
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

Content

show
hide
Free keywords: Alpine lakes; microbial food web; mixotrophic flagellate grazing; Daphnia longispina
 Abstract: In a fishless oligotrophic Alpine lake (Lago Paione Superiore: LPS), with a simple trophic food web, the relationships between microorganisms and zooplankton have been studied. During the ice-free period 1999, bacterial grazing by mixotrophic flagellates (MxFl), autotrophic carbon fixation and excretion (EOC), bacterial production, and zooplankton abundance and biomass were measured weekly. After ice-melt, MxFl, which constituted 94% of total phytoplankton, increased in number until the appearance of Daphnia longispina, the dominant crustacean zooplankton species in LPS. Gross primary production and EOC ranged from 0.2 to 2.5 and from 0.1 to 1.8 µg C l-1 h-1, respectively. EOC accounted for 45 to 90% of total autotrophic production. Community grazing rate of MxFl was higher at 9 m in comparison with 1 m and ranged from 3 to 62 ´ 103 bact ml-1 h-1. MxFl ingested 0.2 to 8% of the natural bacterioplankton per hour, in summer. The community grazing rate of mixotrophic flagellates was significantly correlated with the phytoplanktonic photosynthetic activity (P = 0.006) and with the bacterial production (P = 0.037). In August, Daphnia grazing caused a rapid decrease of both bacteria and MxFl and of their activities. Phytoplankton photosynthetic efficiency increased in late summer after a phosphorus pulse. Although P excretion by zooplankton was not measured, it is speculated that Daphnia play an important role in the availability of this element firstly by grazing bacteria and MxFl in the water column and, after the exhaus­tion of such food, by browsing algae at the water-sediment interface

Details

show
hide
Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 8013
Other: 2075/S 37 804
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of Limnology
  Alternative Title : J. Limnol.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 61 (2) Sequence Number: - Start / End Page: 177 - 182 Identifier: ISSN: 1129-5767