Bennett William N, Boraas Martin E
University of Wisconsin-Milwaukee and Center for Great Lakes Studies, 53201, Milwaukee, WI, USA.
Oecologia. 1989 Dec;81(4):494-500. doi: 10.1007/BF00378958.
The population dynamics of a slow- and a fast-growing strain of the rotifer Brachionus calyciflorus are compared. Rotifers were grown in steady-states, at various specific growth rates (μ), in both two-stage chemostat and turbidostat cultures on the green alga Chlorella pyrenoidosa. Population variables, including specific ingestion (I), loss (L) and filtration (F) rates, yield (Y), production (P) and half-saturation coefficient of growth (K ), were calculated using a growth model based on saturation kinetics. I, L, F and K were shown to be higher and Y and P lower for the fast-growing strain. Differences between the two strains with regard to these variables may represent tradeoffs associated with the faster potential growth rate. Steady-state relationships between these values and μ for the fast-growing strain, however, deviated from model predictions which suggest a possible shift from carbon to non-carbon growth limitation.
比较了萼花臂尾轮虫（Brachionus calyciflorus）的一个生长缓慢型品系和一个生长快速型品系的种群动态。轮虫在稳态下，于不同的比生长速率（μ）条件下，在以小球藻（Chlorella pyrenoidosa）为食的两级恒化器和浊度恒定培养器中培养。使用基于饱和动力学的生长模型计算种群变量，包括比摄食率（I）、损失率（L）、滤食率（F）、产量（Y）、生产力（P）和生长半饱和系数（K）。结果表明，生长快速型品系的I、L、F和K较高，而Y和P较低。这两个品系在这些变量上的差异可能代表了与更快潜在生长速率相关的权衡。然而，生长快速型品系的这些值与μ之间的稳态关系偏离了模型预测，这表明可能从碳限制生长转变为非碳限制生长。
