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Grazing resistance allows bloom formation and may explain invasion success of Gonyostomum semen

Lebret, Karen LU ; Fernández Fernández, María; Hagman, Camilla H. C.; Rengefors, Karin LU and Hansson, Lars-Anders LU (2012) In Limnology and Oceanography 57(3). p.727-734
Abstract
The nuisance alga Gonyostomum semen (Raphidophyceae) has expanded in the Nordic countries during the last decades and can dominate lake phytoplankton communities almost completely. A possible explanation to its dominance could be limited grazing by zooplankton. We investigated the potential grazing pressure on G. semen using an experimental approach supported by field data. We determined the grazing rate by cladocerans, calanoid copepods, and Chaoborus larvae to determine which were able to feed on G. semen. Only the large cladoceran Daphnia magna was able to feed successfully on G. semen. The large cell size of G. semen was likely a limiting factor

for the filtering apparatus of smaller cladocerans. The copepod Eudiaptomus... (More)
The nuisance alga Gonyostomum semen (Raphidophyceae) has expanded in the Nordic countries during the last decades and can dominate lake phytoplankton communities almost completely. A possible explanation to its dominance could be limited grazing by zooplankton. We investigated the potential grazing pressure on G. semen using an experimental approach supported by field data. We determined the grazing rate by cladocerans, calanoid copepods, and Chaoborus larvae to determine which were able to feed on G. semen. Only the large cladoceran Daphnia magna was able to feed successfully on G. semen. The large cell size of G. semen was likely a limiting factor

for the filtering apparatus of smaller cladocerans. The copepod Eudiaptomus gracilis did not graze on G. semen, although the mechanism behind this selective feeding is still unknown. In addition to the experimental study, we quantified the zooplankton and phytoplankton communities in 40 lakes to determine the composition and abundance of the zooplankton communities co-occurring with G. semen, suggesting that large cladoceran species were not present in lakes where G. semen occurred. Hence, the growth of G. semen is not significantly controlled by grazing in natural systems, which likely facilitates bloom formation and invasion success of G. semen. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Limnology and Oceanography
volume
57
issue
3
pages
727 - 734
publisher
ASLO
external identifiers
  • wos:000306239300005
  • scopus:84861668877
ISSN
1939-5590
DOI
10.4319/lo.2012.57.3.0727
project
BECC
language
English
LU publication?
yes
id
c1f3e2d3-426f-47f0-9544-09d899a9f0f7 (old id 2518124)
date added to LUP
2012-05-08 11:17:42
date last changed
2017-04-16 03:09:35
@article{c1f3e2d3-426f-47f0-9544-09d899a9f0f7,
  abstract     = {The nuisance alga Gonyostomum semen (Raphidophyceae) has expanded in the Nordic countries during the last decades and can dominate lake phytoplankton communities almost completely. A possible explanation to its dominance could be limited grazing by zooplankton. We investigated the potential grazing pressure on G. semen using an experimental approach supported by field data. We determined the grazing rate by cladocerans, calanoid copepods, and Chaoborus larvae to determine which were able to feed on G. semen. Only the large cladoceran Daphnia magna was able to feed successfully on G. semen. The large cell size of G. semen was likely a limiting factor<br/><br>
for the filtering apparatus of smaller cladocerans. The copepod Eudiaptomus gracilis did not graze on G. semen, although the mechanism behind this selective feeding is still unknown. In addition to the experimental study, we quantified the zooplankton and phytoplankton communities in 40 lakes to determine the composition and abundance of the zooplankton communities co-occurring with G. semen, suggesting that large cladoceran species were not present in lakes where G. semen occurred. Hence, the growth of G. semen is not significantly controlled by grazing in natural systems, which likely facilitates bloom formation and invasion success of G. semen.},
  author       = {Lebret, Karen and Fernández Fernández, María and Hagman, Camilla H. C. and Rengefors, Karin and Hansson, Lars-Anders},
  issn         = {1939-5590},
  language     = {eng},
  number       = {3},
  pages        = {727--734},
  publisher    = {ASLO},
  series       = {Limnology and Oceanography},
  title        = {Grazing resistance allows bloom formation and may explain invasion success of Gonyostomum semen},
  url          = {http://dx.doi.org/10.4319/lo.2012.57.3.0727},
  volume       = {57},
  year         = {2012},
}