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Habitat structure and juvenile fish ontogeny shape zooplankton spring dynamics

Nicolle, Alice LU ; Hansson, Lars-Anders LU and Brönmark, Christer LU (2010) In Hydrobiologia 652(1). p.119-125
Abstract
Macrophytes in shallow lakes have the potential to alter fish-zooplankton interactions considerably. How far predation effects by newly hatched fish (0+ fish) on zooplankton are influenced by different types of aquatic vegetation, and how effects change during the first weeks of fish ontogeny remains, however, less clear. In order to address these issues, we examined the predation effects of 0+ fish on zooplankton in three different habitats during spring and summer in a shallow, eutrophic lake in Sweden. Zooplankton and fish samples were taken along the reed vegetation, in a shallow, unvegetated part of the lake and above dense, submersed vegetation to relate 0+ fish predation effects to vegetation complexity. All the size classes of... (More)
Macrophytes in shallow lakes have the potential to alter fish-zooplankton interactions considerably. How far predation effects by newly hatched fish (0+ fish) on zooplankton are influenced by different types of aquatic vegetation, and how effects change during the first weeks of fish ontogeny remains, however, less clear. In order to address these issues, we examined the predation effects of 0+ fish on zooplankton in three different habitats during spring and summer in a shallow, eutrophic lake in Sweden. Zooplankton and fish samples were taken along the reed vegetation, in a shallow, unvegetated part of the lake and above dense, submersed vegetation to relate 0+ fish predation effects to vegetation complexity. All the size classes of zooplankton decreased when 0+ fish started to feed on them in all the different habitats. The magnitude of predation effects depended, however, on both the size of zooplankton and the complexity of the vegetation. While small cladocerans could maintain stable populations in the dense Chara vegetation after 0+ fish had started to feed on them, medium and large-sized zooplankton disappeared from all the habitats. Our results suggest that only small cladocerans can use dense vegetation as a refuge against 0+ fish predation, while medium and large zooplankton are not safe from 0+ fish predation in any habitat. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Predation, Juvenile fish, 0+fish, Macrophytes, Zooplankton
in
Hydrobiologia
volume
652
issue
1
pages
119 - 125
publisher
Springer
external identifiers
  • wos:000280087900010
  • scopus:77954689022
ISSN
0018-8158
DOI
10.1007/s10750-010-0323-7
project
CAnMove
language
English
LU publication?
yes
id
549940f8-80cc-44ab-8b3f-9e0ff441f46d (old id 1654939)
date added to LUP
2010-08-25 15:38:28
date last changed
2018-05-29 09:37:07
@article{549940f8-80cc-44ab-8b3f-9e0ff441f46d,
  abstract     = {Macrophytes in shallow lakes have the potential to alter fish-zooplankton interactions considerably. How far predation effects by newly hatched fish (0+ fish) on zooplankton are influenced by different types of aquatic vegetation, and how effects change during the first weeks of fish ontogeny remains, however, less clear. In order to address these issues, we examined the predation effects of 0+ fish on zooplankton in three different habitats during spring and summer in a shallow, eutrophic lake in Sweden. Zooplankton and fish samples were taken along the reed vegetation, in a shallow, unvegetated part of the lake and above dense, submersed vegetation to relate 0+ fish predation effects to vegetation complexity. All the size classes of zooplankton decreased when 0+ fish started to feed on them in all the different habitats. The magnitude of predation effects depended, however, on both the size of zooplankton and the complexity of the vegetation. While small cladocerans could maintain stable populations in the dense Chara vegetation after 0+ fish had started to feed on them, medium and large-sized zooplankton disappeared from all the habitats. Our results suggest that only small cladocerans can use dense vegetation as a refuge against 0+ fish predation, while medium and large zooplankton are not safe from 0+ fish predation in any habitat.},
  author       = {Nicolle, Alice and Hansson, Lars-Anders and Brönmark, Christer},
  issn         = {0018-8158},
  keyword      = {Predation,Juvenile fish,0+fish,Macrophytes,Zooplankton},
  language     = {eng},
  number       = {1},
  pages        = {119--125},
  publisher    = {Springer},
  series       = {Hydrobiologia},
  title        = {Habitat structure and juvenile fish ontogeny shape zooplankton spring dynamics},
  url          = {http://dx.doi.org/10.1007/s10750-010-0323-7},
  volume       = {652},
  year         = {2010},
}