English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Daphnia versus copepod impact on summer phytoplankton: functional compensation at both trophic levels

Sommer, U., Sommer, F., Santer, B., Zöllner, E., Jürgens, K., Jamieson, C., et al. (2003). Daphnia versus copepod impact on summer phytoplankton: functional compensation at both trophic levels. Oecologia, 135(4), 639-647. doi:10.1007/s00442-003-1214-7.

Item is

Files

show Files
hide Files
:
sommer_2003.pdf (Publisher version), 304KB
 
File Permalink:
-
Name:
sommer_2003.pdf
Description:
-
OA-Status:
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:
Sommer, Ulrich1, Author           
Sommer, Frank, Author
Santer, Barbara1, Author           
Zöllner, Eckart1, Author           
Jürgens, Klaus1, Author           
Jamieson, Colleen1, Author           
Boersma, Maarten1, Author           
Gocke, Klaus, 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: phytoplankton; zooplankton; copepoda; cladocera; top-down- control
 Abstract: Here we report on a mesocom study performed to compare the top- down impact of microphagous and macrophagous zooplankton on phytoplankton. We exposed a species-rich, summer phytoplankton assemblage from the mesotrophic Lake Schohsee (Germany) to logarithmically scaled abundance gradients of the microphagous cladoceran Daphnia hyalinaxgaleata and of a macrophagous copepod assemblage. Total phytoplankton biomass, chlorophyll a and primary production showed only a weak or even insignificant response to zooplankton density in both gradients. In contrast to the weak responses of bulk parameters, both zooplankton groups exerted a strong and contrasting influence on the phytoplankton species composition. The copepods suppressed large phytoplankton, while nanoplanktonic algae increased with increasing copepod density. Daphnia suppressed small algae, while larger species compensated in terms of biomass for the losses. Autotrophic picoplankton declined with zooplankton density in both gradients. Gelatinous, colonial algae were fostered by both zooplankton functional groups, while medium- sized (ca. 3,000 mum(3)), non-gelatinous algae were suppressed by both. The impact of a functionally mixed zooplankton assemblage became evident when Daphnia began to invade and grow in copepod mesocosms after ca. 10 days. Contrary to the impact of a single functional group, the combined impact of both zooplankton groups led to a substantial decline in total phytoplankton biomass.

Details

show
hide
Language(s): eng - English
 Dates: 2003-05
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 35005
ISI: 000183722700019
DOI: 10.1007/s00442-003-1214-7
Other: 2205/S 37939
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Oecologia
  Alternative Title : Oecologia
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 135 (4) Sequence Number: - Start / End Page: 639 - 647 Identifier: ISSN: 0029-8549