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Counteracting effects of recruitment and predation shape establishment of rotifer communities under climate change

Zhang, Huan LU ; Ekvall, Mattias LU ; Xu, Jun and Hansson, Lars-Anders LU (2015) In Limnology and Oceanography 60(5). p.1577-1587
Abstract
To assess how synergies between climate warming and increased concentrations of humic substances ("brownification") will affect rotifer community establishment in spring, we conducted a mesocosm experiment where we combined a 3 degrees C temperature increase with a doubling in water color, changes corresponding to modeled projections for the coming 25-75 yr. We also performed a complementary predation experiment to separate the effects of predation from climate-driven changes. We show that recruitment from the sediment is crucial for shaping the rotifer community and that an elevated temperature will likely advance the recruitment peak resulting in an earlier rotifer peak abundance in spring. However, increased predator abundances, also... (More)
To assess how synergies between climate warming and increased concentrations of humic substances ("brownification") will affect rotifer community establishment in spring, we conducted a mesocosm experiment where we combined a 3 degrees C temperature increase with a doubling in water color, changes corresponding to modeled projections for the coming 25-75 yr. We also performed a complementary predation experiment to separate the effects of predation from climate-driven changes. We show that recruitment from the sediment is crucial for shaping the rotifer community and that an elevated temperature will likely advance the recruitment peak resulting in an earlier rotifer peak abundance in spring. However, increased predator abundances, also resulting from elevated temperatures, counteracted the climate driven increase in rotifer recruitment and thereby hampered the pelagic establishment of rotifers. We show further that different rotifer genera respond differently to these increased predation pressure due to selective predation by copepods and taxa-specific protection morphologies and behaviors of rotifers. However, with the exception of one taxon, the effects from brownification were negligible, compared to effects imposed by elevated temperatures. We conclude, therefore, that future rotifer dynamics will be affected both directly through elevated temperatures and indirectly by increased predation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Limnology and Oceanography
volume
60
issue
5
pages
1577 - 1587
publisher
ASLO
external identifiers
  • wos:000362227500008
  • scopus:84953717207
ISSN
1939-5590
DOI
10.1002/lno.10122
language
English
LU publication?
yes
id
ec373d46-244a-4427-8b98-0113adfbd9e6 (old id 8227141)
date added to LUP
2015-12-01 08:28:05
date last changed
2017-10-29 03:51:41
@article{ec373d46-244a-4427-8b98-0113adfbd9e6,
  abstract     = {To assess how synergies between climate warming and increased concentrations of humic substances ("brownification") will affect rotifer community establishment in spring, we conducted a mesocosm experiment where we combined a 3 degrees C temperature increase with a doubling in water color, changes corresponding to modeled projections for the coming 25-75 yr. We also performed a complementary predation experiment to separate the effects of predation from climate-driven changes. We show that recruitment from the sediment is crucial for shaping the rotifer community and that an elevated temperature will likely advance the recruitment peak resulting in an earlier rotifer peak abundance in spring. However, increased predator abundances, also resulting from elevated temperatures, counteracted the climate driven increase in rotifer recruitment and thereby hampered the pelagic establishment of rotifers. We show further that different rotifer genera respond differently to these increased predation pressure due to selective predation by copepods and taxa-specific protection morphologies and behaviors of rotifers. However, with the exception of one taxon, the effects from brownification were negligible, compared to effects imposed by elevated temperatures. We conclude, therefore, that future rotifer dynamics will be affected both directly through elevated temperatures and indirectly by increased predation.},
  author       = {Zhang, Huan and Ekvall, Mattias and Xu, Jun and Hansson, Lars-Anders},
  issn         = {1939-5590},
  language     = {eng},
  number       = {5},
  pages        = {1577--1587},
  publisher    = {ASLO},
  series       = {Limnology and Oceanography},
  title        = {Counteracting effects of recruitment and predation shape establishment of rotifer communities under climate change},
  url          = {http://dx.doi.org/10.1002/lno.10122},
  volume       = {60},
  year         = {2015},
}