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Development of tolerance against toxic cyanobacteria in Daphnia

Gustafsson, Susanne LU and Hansson, Lars-Anders LU (2004) In Aquatic Ecology 38(1). p.37-44
Abstract
We tested whether previous exposure to a toxic strain of cyanobacteria (Microcystis) affects survival, growth, and reproduction of a common herbivore, Daphnia magna. Samples from three natural populations of D. magna were each divided into two parts; one part was fed a mixture of toxic Microcystis and the non-toxic green alga Scenedesmus whereas the other part was fed only Scenedesmus. After four weeks, we compared the ability of these two populations to withstand the toxic Microcystis by assessing survivorship, growth, and reproduction. We found that the ability of D. magna to cope successfully with toxic Microcystis is improved if the animals have experienced previous exposure to toxic Microcystis. This suggests that the toxin may less... (More)
We tested whether previous exposure to a toxic strain of cyanobacteria (Microcystis) affects survival, growth, and reproduction of a common herbivore, Daphnia magna. Samples from three natural populations of D. magna were each divided into two parts; one part was fed a mixture of toxic Microcystis and the non-toxic green alga Scenedesmus whereas the other part was fed only Scenedesmus. After four weeks, we compared the ability of these two populations to withstand the toxic Microcystis by assessing survivorship, growth, and reproduction. We found that the ability of D. magna to cope successfully with toxic Microcystis is improved if the animals have experienced previous exposure to toxic Microcystis. This suggests that the toxin may less affect the D. magna populations that are repeatedly exposed to toxic cyanobacteria in their natural habitat than populations lacking prior exposure. Since the ability to tolerate toxins is manifested in both improved survival and larger size of the animals, it may have considerable impact on zooplankton community composition in fresh-waters. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Aquatic Ecology
volume
38
issue
1
pages
37 - 44
publisher
Springer
external identifiers
  • wos:000220394900005
  • scopus:1842659911
ISSN
1386-2588
DOI
10.1023/B:AECO.0000020985.47348.5e
language
English
LU publication?
yes
id
23888bdd-8809-4765-9589-cf5399c984cf (old id 136682)
date added to LUP
2007-06-28 13:33:27
date last changed
2017-12-10 04:39:50
@article{23888bdd-8809-4765-9589-cf5399c984cf,
  abstract     = {We tested whether previous exposure to a toxic strain of cyanobacteria (Microcystis) affects survival, growth, and reproduction of a common herbivore, Daphnia magna. Samples from three natural populations of D. magna were each divided into two parts; one part was fed a mixture of toxic Microcystis and the non-toxic green alga Scenedesmus whereas the other part was fed only Scenedesmus. After four weeks, we compared the ability of these two populations to withstand the toxic Microcystis by assessing survivorship, growth, and reproduction. We found that the ability of D. magna to cope successfully with toxic Microcystis is improved if the animals have experienced previous exposure to toxic Microcystis. This suggests that the toxin may less affect the D. magna populations that are repeatedly exposed to toxic cyanobacteria in their natural habitat than populations lacking prior exposure. Since the ability to tolerate toxins is manifested in both improved survival and larger size of the animals, it may have considerable impact on zooplankton community composition in fresh-waters.},
  author       = {Gustafsson, Susanne and Hansson, Lars-Anders},
  issn         = {1386-2588},
  language     = {eng},
  number       = {1},
  pages        = {37--44},
  publisher    = {Springer},
  series       = {Aquatic Ecology},
  title        = {Development of tolerance against toxic cyanobacteria in Daphnia},
  url          = {http://dx.doi.org/10.1023/B:AECO.0000020985.47348.5e},
  volume       = {38},
  year         = {2004},
}