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首页> 外文期刊>Limnology and Oceanography >Estimation of phosphorus release rates from natural zooplankton communities feeding on planktonic algae and bacteria
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Estimation of phosphorus release rates from natural zooplankton communities feeding on planktonic algae and bacteria

机译：以浮游藻类和细菌为食的天然浮游动物群落的磷释放速率估算

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摘要

Phosphorus release rates from Daphnia galeata, the dominant metazoan, were estimated in eutrophic Lake Nesjovatn during summer by applying our previously published mass balance model. For both juveniles (2.0 μg C ind.~(-1)) and adults (6.6 μg C ind.~(-1)), three different estimates of P release were made by two different parametrizations and by considering the importance of ingestion of detrital particles. As a basis for estimates of P release, clearance rates of algae and bacteria were determined as well as a thorough characterization of the food compartments. The specific release rate of P varied between 0.16 and 1.18 μg, P mg C~(-1) h~(-1) for juveniles and between 0.06 and 0.96 for adults, independent of estimate. These release rates are considerably lower than those obtained by previously published models. Most of the observed variation was due to variation in the P content of the food, thus emphasizing the importance of including this variable in studies of P release from zooplankton. Calculations of rates of population P release suggest that D. galeata contributed < 1/3 of the P requirements of algae and bacteria.
机译：运用我们以前发表的质量平衡模型，估算了夏季富营养化的内斯约瓦滕湖中主要的后生动物蚤（Daphnia galeata）的磷释放速率。对于两个少年（2.0μgC ind。〜（-1））和成年人（6.6μgC ind。〜（-1）），通过两种不同的参数设置并考虑摄入的重要性，对磷释放进行了三种不同的估计。碎屑颗粒。作为估算磷释放量的基础，确定了藻类和细菌的清除率以及对食物隔室的全面描述。磷的比释放速率在0.16和1.18μg之间，对于青少年，P mg C〜（-1）h〜（-1），对于成年人，在0.06和0.96之间，与估计无关。这些释放率大大低于以前发布的模型。观察到的大多数变化是由于食物中磷含量的变化所致，因此强调了在研究浮游动物释放磷的过程中纳入该变量的重要性。种群磷释放速率的计算表明，D。galeata贡献了藻类和细菌对磷的需求的1/3。

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