English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Structural and functional patterns of bacterial communities in response to protist predation along an experimental productivity gradient

Corno, G., & Jürgens, K. (2008). Structural and functional patterns of bacterial communities in response to protist predation along an experimental productivity gradient. Environmental Microbiology, 10(10), 2857-2871. doi:10.1111/j.1462-2920.2008.01713.x.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D661-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D662-3
Genre: Journal Article

Files

show Files
hide Files
:
corno_2008.htm (Publisher version), 2KB
 
File Permalink:
-
Name:
corno_2008.htm
Description:
-
Visibility:
Restricted (Max Planck Institute for Evolutionary Biology, Plön; )
MIME-Type / Checksum:
text/html
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Corno, Gianluca1, Author              
Jürgens, Klaus1, 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: -
 Abstract: Substrate supply and protist grazing are two of the most important forces that determine the composition and properties of bacterial assemblages. General ecological theory predicts that the relative importance of these factors is changing with the environmental productivity. In the present study, the interplay between bottom-up and top-down control was studied in a productivity gradient simulated in one-stage chemostats containing natural assemblages of freshwater bacteria and heterotrophic nanoflagellates. Bacterial assemblages in the chemostats differed strongly with respect to their morphological, physiological and compositional properties in the presence versus the absence of predators. However, theses differences were modified by the productivity gradient. Whereas in predator-free chemostats the mean abundance and biomass of bacteria increased proportionally with increasing substrate supply, in treatments that included flagellates bacterial production was largely channelled into predator biomass. The bacterial morphological diversity increased along the productivity gradient with increasing substrate input but even more so with predators. Proportional to the increasing substrate supply, predation shifted the remaining bacteria towards morphologically inedible forms. Predation also caused shifts in bacterial substrate-utilization profiles, and in bacterial community composition, as analysed by terminal restriction fragment length polymorphism of PCR-amplified 16S-rRNA genes. Without predators, bacterial richness increased along the productivity gradient whereas with predators bacterial richness was higher at intermediate substrate levels. In accordance with ecological theory, these results demonstrated that predators influence all of the major characteristics of bacterial assemblages but the magnitude of this effect is modulated by the productivity of the system.

Details

show
hide
Language(s): eng - English
 Dates: 2008-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 380074
DOI: 10.1111/j.1462-2920.2008.01713.x
Other: 2640/S 38911
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Environmental Microbiology
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 10 (10) Sequence Number: - Start / End Page: 2857 - 2871 Identifier: ISSN: 1462-2912