相关实验视频
Updated: Jun 23, 2025

08:20
A Method for Quantifying Foliage-Dwelling Arthropods
Published on: October 20, 2019
5.8K
在气候变化中,地下植物通过与树冠树同步转移表态来避免在温带树叶森林中遮阳,以避免气候变化
Carol K Augspurger1, Carl F Salk2,3
1Department of Plant Biology, University of Illinois, Urbana, IL, United States of America.
PloS one
|June 26, 2024
概括
全球变暖改变了森林植物的叶子发育时间. 树冠和底层植物之间的不匹配的转移可以减少光线拦截,特别是在温暖的春天的底层物种.
科学领域:
- 森林生态 森林生态
- 植物现象学 植物现象学
- 气候变化影响 气候变化影响
背景情况:
- 全球变暖导致温带树叶森林的叶子更早脱落,叶子更晚落下.
- 森林树冠和底层树林层之间的叶子表态差异可能会影响底层植物的光度.
研究的目的:
- 为了研究28年来树冠和底层植物群落之间不匹配的现象学转移.
- 量化底层现象学,树冠现象学,温度和太阳辐射对底层光线拦截的影响.
主要方法:
- 分析了28年的 (1995-2022) 来自美国伊利诺伊州Trelease Woods的每周数据.
- 包括31种草本物种,3种幼苗物种和15种占主导地位的树冠树种的数据.
- 结合现象学数据与太阳辐射,温度和天花板光传导率数据.
主要成果:
- 底层和树冠现象学是底层光线可用性的主要限制因素,因物种而异.
- 两层的现象变化往往以相同的方向发生,大大抵消了对光拦截的影响.
- 温暖的泉源与某些物种的光拦截增加有关,但树冠现象学变得更加限制.
结论:
- 由于气候变化,很少有底层树种表现出与树冠的现象不匹配,这可能导致温暖年减少光线拦截.
- 观察到的趋势表明,虽然一些物种显示光拦截和春季温度之间的负面关系,总体影响是复杂的,经常抵消.
- 碳同化模式在很大程度上反映了现有数据的物种的光拦截趋势.
相关概念视频
Adaptations that Reduce Water Loss
25.5K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.5K
Biological Clocks and Seasonal Responses
34.6K
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.
34.6K
Epiphytes, Parasites, and Carnivores
13.0K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
13.0K
Photoreceptors and Plant Responses to Light
20.3K
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.
20.3K
Light Acquisition
8.4K
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.
8.4K
Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K

