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首页> 外文期刊>Hydrobiologia >Temporal changes in essential fatty acid availability in different food sources in the littoral macrophyte zone
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Temporal changes in essential fatty acid availability in different food sources in the littoral macrophyte zone

机译：沿海大型植物区不同食物来源必需脂肪酸供应的时间变化

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摘要

In littoral environments, different food resources are available for zooplankters. In addition to seston, species may feed on biofilms growing on sediments, plants (epiphyton), and at the air-water interface (neuston). However, despite a growing interest in these different biofilms, little is known about their food quality for microcrustaceans. In a field study, we measured changes in the food quality over time in terms of the essential fatty acid (EFA) content of different potential food sources for littoral consumers. The food quality of seston, neuston, and epiphyton growing on three different aquatic macrophytes were assessed. Our results showed that there is an important seasonal variability within each food source. However, in the system studied, epiphytic biofilms, especially those of Ludwigia and Callitriche offered the highest food quality, in terms of EFA content, throughout the year. As the highest EFA concentrations in each food source were found consecutively, high concentrations of these physiologically important compounds are maintained in the system throughout the year. Therefore, greater diversity of food resources could affect ecosystem productivity
机译：在沿海环境中，浮游动物可获得不同的食物资源。除色氨酸外，物种还可能以沉积物，植物（表藻）和空气-水界面（神经素）上生长的生物膜为食。然而，尽管人们对这些不同的生物膜越来越感兴趣，但对于它们的微甲壳动物的食物质量知之甚少。在一项现场研究中，我们根据沿海消费者不同潜在食物来源中必需脂肪酸（EFA）的含量，测量了食物质量随时间的变化。评估了三种不同水生植物生长的seston，neuston和epiphyton的食品质量。我们的结果表明，每种食物来源之间都有重要的季节性变化。然而，在所研究的系统中，附生生物膜，特别是路德维希亚和Callitriche的附生生物膜，全年全食质量最高。由于连续发现每种食物来源中的EFA浓度最高，因此系统中全年都保持着这些生理上重要的化合物的高浓度。因此，粮食资源的更大多样性可能会影响生态系统的生产力

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