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热浪引起的动物浮游生物群落的功能转变导致植物浮游生物的上下控制较弱

Thu-Hương Huỳnh^1,2,3, Zsófia Horváth^1,3, Károly Pálffy^1,3

¹Institute of Aquatic Ecology HUN-REN Centre for Ecological Research Budapest Hungary.

Ecology and evolution

|August 7, 2024

概括

淡水热浪迅速改变动物浮游生物的特征,有利于更大的物种. 这种转变削弱了生态系统的控制,可能导致水生环境中有害的藻类繁殖.

科学领域:

生态生态学生态生态学
环境科学环境科学
水生生物学水生生物学

背景情况:

淡水生态系统面临着来自平均温度上升和极端热浪的日益增长的热压力.
虽然预计热浪会比逐渐变暖产生更直接的影响,但比较实验数据很少.

研究的目的:

调查持续升温和反复出现的热浪对淡水浮游生物群落的影响.
评估动物浮游生物特征和功能组的变化如何影响生态系统功能,特别是对初级生产者的自上而下的控制.

主要方法:

进行了一个为期1个月的中宇宙实验,使用受控的变暖治疗 (+3°C恒定,+6°C热浪).
动物浮游生物的特征组成 (体长,体量) 和功能群被分析.
测量了对植物浮游生物质的影响,以推断自上而下的控制.

主要成果:

反复出现的热浪显著改变了动物浮游生物的特征组成和功能群体,比持续变暖更快.
热浪导致小体牧草动物 (Rotifera) 的数量下降,并促进了更大的食肉动物Copepoda的主导地位.
这些动物浮游生物的转变导致了自上而下的控制减少,导致植物浮游生物质增加.

结论:

热浪通过改变动物浮游生物群落结构,对淡水生态系统产生强烈的间接影响.
热浪导致的动物浮游生物特征和功能群体的变化可能会损害生态系统功能并促进藻类繁殖.
了解这些间接影响对于在气候变化下管理淡水生态系统至关重要.

关键词:

气候变化气候变化气候变化功能特征功能特征功能特征热浪热浪热浪的热浪是什么微动物浮游生物微动物浮游生物种类的相互作用物种的相互作用从上到下的控制系统.气候变暖导致的变暖

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