Rothhaupt Karl Otto
Ökologische Außenstelle der Universität Frankfurt, Schlagweg 19, D-6490, Schlüchtern 1, Federal Republic of Germany.
Oecologia. 1985 Jan;65(2):252-259. doi: 10.1007/BF00379225.
A model, based on energy-flow considerations, is presented which describes the population dynamics of Brachionus rubens in the second stage of a two-stage algalrotifer chemostat. The rotifers are foodlimited with substrate-inhibition occurring at high algal densities. The model shows two stable states: steady state with constant density of rotifers and washout of the animals. Which one of the stable states is reached depends on the initial conditions.Empirical data are in general agreement with the model. Deviations may be explained by the fact that the data underlying the model calculations are based on a different food alga (Chlorella vulgaris) than the one used in the experiments (Monoraphidium minutum).The observed population growth rate reaches a maximum value of 0.84 (1/day) at algal densities of 3-4. 10 cells/ml. It decreases at higher algal densities. The egg ratio is related linearily to algal density without being reduced at high algal densities.
基于能量流考虑，提出了一个模型，该模型描述了在两级藻类-轮虫恒化器第二阶段中红臂尾轮虫的种群动态。轮虫受食物限制，在高藻类密度下会出现底物抑制。该模型显示出两种稳定状态：轮虫密度恒定的稳态和动物的冲出。达到哪种稳定状态取决于初始条件。实证数据总体上与该模型一致。偏差可能是由于模型计算所依据的数据基于与实验中使用的不同的食物藻类（小球藻）（实验中使用的是微小单歧藻）这一事实所致。在藻类密度为3 - 4×10⁶个细胞/毫升时，观察到的种群增长率达到最大值0.84（1/天）。在更高的藻类密度下它会下降。卵比率与藻类密度呈线性关系，在高藻类密度下不会降低。
