@misc{12248,
  abstract     = {{Diatoms often dominate temperate lakes and rivers in spring, when increasing temperature and daylength coincide with decreasing silicate concentrations. Since interactions between these factors may be important, we cultivated Stephanodiscus minutulus and Nitzschia acicularis (freshwater diatoms) under silicon limitation at different temperatures and photoperiods in continuous and batch culture. The Monod parameters of Si-limited growth indicated that S. minutulus should be superior under Si limitation. The type of interaction between silicate, temperature and photoperiod differed between species and indicated that the advantage of S. minutulus increases under low temperatures and photoperiods. Competition experiments in semicontinuous culture confirmed these predictions and were described accurately with a model of factor interactions. Multiple regression analysis of field data from a shallow eutrophic lake showed that dissolved silicate (DSi), temperature, photoperiod and total phosphorus (TP) were the most important predictors of spring centric diatom biovolume, where lower temperatures and photoperiods favour this group and higher biovolumes coincide with DSi depletion and higher TP. Pennate diatoms depended more on light, winter population size and grazer abundance. Conditions in situ suggested that factor interactions play a role during spring under strong Si limitation. We propose that the type of interaction reflects specific niche adaptation. Understanding interactions between physical factors and nutrients will increase our understanding of phytoplankton diversity and predictive accuracy of phytoplankton dynamics including combined effects of climate and trophic change.}},
  author       = {{Shatwell, Tom and Köhler, Jan and Nicklisch, Andreas}},
  booktitle    = {{Journal of Plankton Research}},
  issn         = {{1464-3774}},
  number       = {{5}},
  pages        = {{957--971}},
  publisher    = {{Oxford University Press (OUP)}},
  title        = {{{Temperature and photoperiod interactions with silicon-limited growth and competition of two diatoms}}},
  doi          = {{10.1093/plankt/fbt058}},
  volume       = {{35}},
  year         = {{2013}},
}

@misc{12252,
  abstract     = {{Global climate change alters the relationship between temperature and light in aquatic ecosystems, which is expected to affect the success of different phytoplankton species. To examine this, the interactions between temperature, photoperiod and light exposure (LE) (integral daily light supply) on specific growth rates were analysed for Limnothrix redekei, Planktothrix agardhii (cyanobacteria), Nitzschia acicularis and Stephanodiscus minutulus (diatoms). A model of factor interactions was developed based on new (P. agardhii and St. minutulus) and previously published laboratory studies. It describes the measured data with high precision. Temperature and photoperiod affect the parameters of the light-growth response curve differently, but these effects are the same for all species. The link between functions for temperature and photoperiod is more species-specific. Using meteorological data, the model developed here was used to study the interplay of these factors during a spring bloom in Lake Müggelsee (Berlin). It was found that while all three factors influenced phytoplankton growth, temperature and photoperiod were more important than LE. Both the intensities of the factors and the interactions between them influenced each species to a different degree. The results may help improve our understanding and ability to predict shifts in phytoplankton communities caused by weather patterns and climate change.}},
  author       = {{Nicklisch, Andreas and Shatwell, Tom and Kohler, Jan}},
  booktitle    = {{Journal of Plankton Research}},
  issn         = {{1464-3774}},
  number       = {{1}},
  pages        = {{75--91}},
  publisher    = {{Oxford University Press (OUP)}},
  title        = {{{Analysis and modelling of the interactive effects of temperature and light on phytoplankton growth and relevance for the spring bloom}}},
  doi          = {{10.1093/plankt/fbm099}},
  volume       = {{30}},
  year         = {{2007}},
}