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温暖的湖泊支持植物浮游生物,而不是鱼类

Benjamin Paul Mooney¹, Anna Gårdmark¹, Carolyn Faithfull¹

¹Department of Aquatic Resources, Swedish University of Agricultural Sciences, Uppsala, Sweden.

Global change biology

|June 9, 2025

概括

气候变暖降低了湖泊中的鱼类生物量,将能量从捕食者转移到植物浮游生物. 这表明,在更温暖的水生生态系统中,食物网效率和捕食者生物量下降.

科学领域:

水生生态学水生生态学
气候变化科学气候变化科学
生态系统动态生态系统动态

背景情况:

气候变暖改变了水生生态系统,影响了生物质在热带层的分布.
了解这些转变对于生态系统的运行和服务提供至关重要.

研究的目的:

研究气候变暖如何影响温带和北极湖泊中鱼类与浮游生物质的生物质比率.
为了测试这个假设,温暖的湖泊相对于植物浮游生物,鱼类生物量更高,如果这是通过营养的可用性调节.

主要方法:

在不同温度和营养水平的湖泊中采用了空间对时间的方法.
分析了植物浮游生物,动物浮游生物和鱼类的物种和生物量数据.
研究了温度,和生物质比率之间的关系.

主要成果:

与假设相反,温暖的湖泊显示出较低的鱼类与浮游生物质生物质比率.
这一趋势无论度或地生产如何,都会持续下去.
在温暖的湖泊中增加的浮游植物生物量与更高的鱼类生物量没有相关性.

结论:

温度升高降低了湖泊中从生产者转移到消费者的能量传输效率.
植物浮游生物和鱼群组成的变化解释了生产者和捕食者生物质的脱.
气温上升可能导致食物网效率下降,北方湖泊的捕食者生物量减少.

关键词:

水生动物的食物网.生物质的分布生物质的分布.气候变暖气候变暖能源转移效率效率是指能量的转移效率.温度梯度的温度梯度是什么

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