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Tao Wang¹, Peiyu Zhang², Jorge García Molinos³

¹Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, PR China; University of Chinese Academy of Sciences, Beijing, PR China.

Journal of environmental management

|August 25, 2023

概括

气候变暖和污染等多种环境压力因素改变了水生食物网的能量流动,复杂的,往往对立的相互作用影响了生态系统的功能和恢复工作.

科学领域:

生态生态学生态生态学
环境科学环境科学
水生生态系统水生生态系统

背景情况:

了解互动性环境压力因素的影响对于生物多样性保护至关重要.
水生生态系统面临着多个同时的压力因素,包括气候变暖,热浪,营养丰富和除草剂污染.

研究的目的:

调查气候变暖,热浪,营养丰富和除草剂暴露对水生食物网能量流的单独和综合影响.
评估这些压力因素如何影响食物层之间的能量转移和整体生态系统功能.

主要方法:

利用户外中宇宙实验来模拟现实的环境条件.
采用稳定同位素分析与生物能源食品网络方法相结合,以量化能量流.
检查了从生产者到二次消费者的能量流通路径和detrital路径.

主要成果:

综合的压力因素显著改变了水生食物网的能量流动模式.
变暖增加了从生产者和初级消费者到二级消费者的能量流.
营养丰富增加了生产者到更高层次的能量流,而除草剂减少了破坏性食物.
互动效应主要是对抗性或添加性,观察到一些协同和反向效应.
持续的变暖和热浪显示出明显的影响,特别是当与水污染相结合时.

结论:

多种压力因素导致水生食物网能量流中的复杂,不对称的反应.
敌对的相互作用和不对称的回应途径对生态系统恢复构成挑战.
有效的环境管理需要一个多层次的,基于网络的视角来解决全球和地方压力因素的结合.

关键词:

生态系统功能生态系统功能能量流是指能量流.热浪热浪热浪热浪多重压力因素造成的压力.它是稳定的同位素.

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