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Interactions between Predation and Resources Shape Zooplankton Population Dynamics.

Nicolle, Alice LU ; Hansson, Lars-Anders LU ; Brodersen, Jakob LU ; Nilsson, Anders LU and Brönmark, Christer LU (2011) In PLoS ONE 6(1).
Abstract
Identifying the relative importance of predation and resources in population dynamics has a long tradition in ecology, while interactions between them have been studied less intensively. In order to disentangle the effects of predation by juvenile fish, algal resource availability and their interactive effects on zooplankton population dynamics, we conducted an enclosure experiment where zooplankton were exposed to a gradient of predation of roach (Rutilus rutilus) at different algal concentrations. We show that zooplankton populations collapse under high predation pressure irrespective of resource availability, confirming that juvenile fish are able to severely reduce zooplankton prey when occurring in high densities. At lower predation... (More)
Identifying the relative importance of predation and resources in population dynamics has a long tradition in ecology, while interactions between them have been studied less intensively. In order to disentangle the effects of predation by juvenile fish, algal resource availability and their interactive effects on zooplankton population dynamics, we conducted an enclosure experiment where zooplankton were exposed to a gradient of predation of roach (Rutilus rutilus) at different algal concentrations. We show that zooplankton populations collapse under high predation pressure irrespective of resource availability, confirming that juvenile fish are able to severely reduce zooplankton prey when occurring in high densities. At lower predation pressure, however, the effect of predation depended on algal resource availability since high algal resource supply buffered against predation. Hence, we suggest that interactions between mass-hatching of fish, and the strong fluctuations in algal resources in spring have the potential to regulate zooplankton population dynamics. In a broader perspective, increasing spring temperatures due to global warming will most likely affect the timing of these processes and have consequences for the spring and summer zooplankton dynamics. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
PLoS ONE
volume
6
issue
1
publisher
Public Library of Science
external identifiers
  • wos:000286834300080
  • scopus:79551641335
ISSN
1932-6203
DOI
10.1371/journal.pone.0016534
project
BECC
language
English
LU publication?
yes
id
e0d200e1-1411-40d6-95a4-e623c37f5a13 (old id 1832123)
date added to LUP
2011-03-04 13:39:54
date last changed
2017-10-22 04:18:13
@article{e0d200e1-1411-40d6-95a4-e623c37f5a13,
  abstract     = {Identifying the relative importance of predation and resources in population dynamics has a long tradition in ecology, while interactions between them have been studied less intensively. In order to disentangle the effects of predation by juvenile fish, algal resource availability and their interactive effects on zooplankton population dynamics, we conducted an enclosure experiment where zooplankton were exposed to a gradient of predation of roach (Rutilus rutilus) at different algal concentrations. We show that zooplankton populations collapse under high predation pressure irrespective of resource availability, confirming that juvenile fish are able to severely reduce zooplankton prey when occurring in high densities. At lower predation pressure, however, the effect of predation depended on algal resource availability since high algal resource supply buffered against predation. Hence, we suggest that interactions between mass-hatching of fish, and the strong fluctuations in algal resources in spring have the potential to regulate zooplankton population dynamics. In a broader perspective, increasing spring temperatures due to global warming will most likely affect the timing of these processes and have consequences for the spring and summer zooplankton dynamics.},
  articleno    = {e16534},
  author       = {Nicolle, Alice and Hansson, Lars-Anders and Brodersen, Jakob and Nilsson, Anders and Brönmark, Christer},
  issn         = {1932-6203},
  language     = {eng},
  number       = {1},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Interactions between Predation and Resources Shape Zooplankton Population Dynamics.},
  url          = {http://dx.doi.org/10.1371/journal.pone.0016534},
  volume       = {6},
  year         = {2011},
}