Match and mismatch between phyto- and zooplankton during spring succession: an experimental analysis with Baltic Sea plankton

应研究浮游植物和浮游动物的春季演替将如何响应预测的气候变化，特别是冬季变暖。来自波罗的海基尔湾的浮游生物将作为中等深度水体的模型系统，在那里浮游植物的春季繁殖可以在热分层开始之前开始。虽然预测浮游植物春华的开始与温度无关，但异养生物的生长过程明显与温度无关。这将导致浮游生物群落不同组成部分的生长和活动模式的同步性发生变化，并可能导致消费者与其食用生物之间的供需关系出现不匹配。通过室内中生态实验（8个单元）和野外同步监测项目（已于2002年启动），研究浮游植物和浮游动物的生长和活动模式、物种组成变化、资源限制模式、营养水平之间的物质和能量转移以及浮游动物繁殖力的响应。

It shall be investigated, how the spring succession of phyto- and zooplankton will change in response to the predicted climate change, in particular to winter warming. Plankton from the Kiel Bight, Baltic Sea, will serve as a model system for moderately deep water bodies, where the phytopankton spring bloom can start before the onset of thermal stratification. While the start of the phytoplankton spring bloom is predicted to be independent of temperature, growth processes of heterotrophs obviously are. This should lead to changed synchronies in the growth and activity patterns of the different components of the plankton community and to a potential mismatch in the demand- supply relationship between consumers and their food organisms. With the help of indoor mesocosm experiments (8 units) and a simultaneous field monitoring program (started already in 2002) the response of phytoplankton and zooplankton growth and activity patterns, shifts in species composition, patterns of resource limitation, matter and energy transfer between trophic levels, and zooplankton fecundity shall be studied.