the good, the bad and the plenty interactive effects of food quality and quantity on the growth of different daphnia species好的,坏的和充足的互动影响的食品质量和数量不同水蚤物种的生长.pdf

The Good, the Bad and the Plenty: Interactive Effects of Food Quality and Quantity on the Growth of Different Daphnia Species 1,2 1,3,4 1 2 Tibor Bukovinszky *, Antonie M. Verschoor , Nico R. Helmsing , T. Martijn Bezemer , 1 5 1 Elisabeth S. Bakker , Matthijs Vos , Lisette N. de Senerpont Domis 1 Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands, 2 Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands, 3 Ingrepro b.v., Borculo, The Netherlands, 4 Wetsus, Centre of Excellence for Sustainable Water Technology, Leeuwarden, The Netherlands, 5 Department of Ecology and Ecosystem Modeling, University of Potsdam, Germany Abstract Effects of food quality and quantity on consumers are neither independent nor interchangeable. Although consumer growth and reproduction show strong variation in relation to both food quality and quantity, the effects of food quality or food quantity have usually been studied in isolation. In two experiments, we studied the growth and reproduction in three filter-feeding freshwater zooplankton species, i.e. Daphnia galeata x hyalina, D. pulicaria and D. magna, on their algal food (Scenedesmus obliquus), varying in carbon to phosphorus (C:P) ratios and quantities (concentrations). In the first experiment, we found a strong positive effect of the phosphorus content of food on growth of Daphnia, both in their early and late juvenile development. Variation in the relationship between the P-content of animals and their growth rate reflected interspecific