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首页> 外文期刊>Limnology >Long-term effects of fish biomanipulation and macrophyte management on zooplankton functional diversity and production in a temperate shallow lake
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Long-term effects of fish biomanipulation and macrophyte management on zooplankton functional diversity and production in a temperate shallow lake

机译：鱼生物化和宏观物质管理对温带浅湖浮游动物功能多样性和生产的长期影响

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Eutrophication still is one of the greatest anthropogenic impacts affecting aquatic ecosystems. Food web manipulations to reverse eutrophic conditions have been applied, mainly by reducing fish stocks. However, the long-term results of biomanipulation are still ambiguous. The objective of this study was to evaluate biomanipulation effects on zooplankton functional diversity and production during 24 years of monitoring a shallow temperate lake. Temporal variation in crustacean biomass (CB), zooplankton resource use efficiency (RUE), limnological variables, functional diversity indices and functional traits were assessed using the Mann-Kendall test. The effects of the limnological and functional variables on zooplankton production (CB and RUE) were analyzed by generalized least squares models (GLSs). We found decreasing trends for almost all the limnological variables, indicating a reduction in lake eutrophic conditions. We also observed a decreasing trend in functional traits related to pelagic habitat, filter-feeding mode, herbivore feeding preference and body size. The GLS results showed that functional dispersion and chlorophyll a are important determinants of zooplankton production. The effects of fish biomanipulation produced no significant temporal trends in zooplankton biomass. In fact, the increase in submerged macrophytes promoted littoral food webs, which was likely the main determining factor of the changes in zooplankton functional traits and production.
机译：富营养化仍然是影响水生生态系统的最大的人为影响之一。主要通过减少鱼类来应用逆转富营养性条件的食品网操作。然而，生物化的长期结果仍然含糊不清。本研究的目的是评估24年监测浅水湖泊的浮游动物功能多样性和生产的生物化效应。使用MANN-KENDALL测试评估甲壳类生物量（CB），浮游植物资源使用效率（RUE），LIMNOGGE ARERIBLES，功能分集指数和功能性状的时间变异。通过广泛的最小二乘模型（GLSS）分析了Zooplankton生产（CB和RUE）对浮游生物生产（CB和RUE）的影响。我们发现几乎所有植物变量的趋势降低，表明湖富养的条件下降。我们还观察到与骨盆栖息地，过滤喂料模式，食草动物喂养偏好和体尺寸相关的功能性状的趋势降低。 GLS结果表明，功能性分散和叶绿素A是浮游植物生产的重要决定因素。鱼生物素的影响在浮游植物生物质中没有产生显着的时间趋势。事实上，淹没的宏观物质的增加促进了沿型食品网，这可能是浮游植物功能性状和生产变化的主要决定因素。

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