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Induction and termination of diapause in a freshwater zooplankton community

Gyllström, Mikael LU (2004) In Archiv für Hydrobiologie 161(1). p.81-97
Abstract
I examined production of, and emergence from, diapausing eggs, together with planktonic dynamics of three cladoceran genera (Bosmina, Ceriodaphnia, and Daphnia) for 16 months in a shallow lake. In a complementary field experiment I manipulated environmental variables potentially important as cues for induction and termination of diapause. Ceriodaphnia and Daphnia, but not Bosmina, were dependent on emergence to initiate planktonic populations in spring. During the rest of the season, emergence was unimportant for population and community dynamics. The timing of diapausing-egg production differed between genera, but tended to coincide with peaks in abundance. No hatching was found in any of the experimental treatments, but diapausing-egg... (More)
I examined production of, and emergence from, diapausing eggs, together with planktonic dynamics of three cladoceran genera (Bosmina, Ceriodaphnia, and Daphnia) for 16 months in a shallow lake. In a complementary field experiment I manipulated environmental variables potentially important as cues for induction and termination of diapause. Ceriodaphnia and Daphnia, but not Bosmina, were dependent on emergence to initiate planktonic populations in spring. During the rest of the season, emergence was unimportant for population and community dynamics. The timing of diapausing-egg production differed between genera, but tended to coincide with peaks in abundance. No hatching was found in any of the experimental treatments, but diapausing-egg production was found in high nutrient treatments with no fish. Field study and experiment together imply that the types of environmental cues involved in diapause induction are different from the ones stimulating its termination. Seasonal cues such as photoperiod appear to govern the hatching of diapausing eggs. In comparison, the induction of diapausing-egg production seems less dependent on season and more on biotic factors. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Archiv für Hydrobiologie
volume
161
issue
1
pages
81 - 97
publisher
E. Schweizerbart Science Publishers
external identifiers
  • wos:000224201400005
  • scopus:4344657989
ISSN
0003-9136
DOI
10.1127/0003-9136/2004/0161-0081
language
English
LU publication?
yes
id
161fe1e4-f34b-4af0-8971-5d4859382b81 (old id 136622)
date added to LUP
2007-06-28 13:33:59
date last changed
2017-09-10 04:24:13
@article{161fe1e4-f34b-4af0-8971-5d4859382b81,
  abstract     = {I examined production of, and emergence from, diapausing eggs, together with planktonic dynamics of three cladoceran genera (Bosmina, Ceriodaphnia, and Daphnia) for 16 months in a shallow lake. In a complementary field experiment I manipulated environmental variables potentially important as cues for induction and termination of diapause. Ceriodaphnia and Daphnia, but not Bosmina, were dependent on emergence to initiate planktonic populations in spring. During the rest of the season, emergence was unimportant for population and community dynamics. The timing of diapausing-egg production differed between genera, but tended to coincide with peaks in abundance. No hatching was found in any of the experimental treatments, but diapausing-egg production was found in high nutrient treatments with no fish. Field study and experiment together imply that the types of environmental cues involved in diapause induction are different from the ones stimulating its termination. Seasonal cues such as photoperiod appear to govern the hatching of diapausing eggs. In comparison, the induction of diapausing-egg production seems less dependent on season and more on biotic factors.},
  author       = {Gyllström, Mikael},
  issn         = {0003-9136},
  language     = {eng},
  number       = {1},
  pages        = {81--97},
  publisher    = {E. Schweizerbart Science Publishers},
  series       = {Archiv für Hydrobiologie},
  title        = {Induction and termination of diapause in a freshwater zooplankton community},
  url          = {http://dx.doi.org/10.1127/0003-9136/2004/0161-0081},
  volume       = {161},
  year         = {2004},
}