夜间的人工光降低了实验草原社区的植物多样性和表现
Solveig Franziska Bucher1,2, Lia Uhde3, Alexandra Weigelt2,3
1German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany.
概括
夜间的人工光 (ALAN) 显著减少了模型社区中的植物生物量和多样性. 这些发现凸显了日益增加的光污染对植物生态系统和物种健康的负面影响.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 植物学 植物学
背景情况:
- 夜间人工照明 (ALAN) 是一个日益严重的全球环境问题.
- 关于ALAN对植物群落和物种健康的影响的证据有限且不一致.
- 植物既需要光来获得能量,也需要黑暗来实现重要的生长和再生过程.
研究的目的:
- 研究夜间人工光梯度 (ALAN) 对植物群体组成,生物质和功能特征的影响.
- 评估不同植物功能组 (草,草药,豆类) 对不同ALAN强度的敏感性.
主要方法:
- 创建16个物种的模型植物群落,暴露于受控的ALAN梯度.
- 测量植物社区生物量,香农多样性和跨治疗方法的均性.
- 在两次收获中对选定物种的功能特征 (特定的叶面积,叶片干物质含量,叶片毛发度) 进行分析.
主要成果:
- 与对照组相比,在最高的ALAN治疗下,生物质减少了33%,香农的多样性减少了43%.
- 在第一次收获中,社区均性下降了34%,一些物种在第二次收获中未能建立.
- 特定的叶面积,叶子干物质含量和叶子毛发性显示出对ALAN暴露的显著反应.
结论:
- 夜间增加的人工光线对植物群体的结构和功能构成重大威胁.
- 植物群体对ALAN表现出敏感性,影响生物量,多样性和物种的建立.
- 保护战略必须考虑未来不断升级的光污染情景,以保护植物生物多样性.
更多相关视频
06:16An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research
Published on: February 2, 2022
2.4K
06:19Low-Cost Automated Flight Intercept Trap for the Temporal Sub-Sampling of Flying Insects Attracted to Artificial Light at Night
Published on: December 29, 2021
2.6K
相关概念视频
02:00Photoreceptors and Plant Responses to Light
20.4K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.4K
02:45Biological Clocks and Seasonal Responses
34.7K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.7K
02:16Light Acquisition
8.5K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.5K
02:26Ecological Disturbance
17.1K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
17.1K