微妙的权衡:非线性多种生物制约对树木吸收细根寿命的非线性多种生物制约
Wenjing Zeng1, M Luke McCormack2, Yun Lyu1
1Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
Ecology letters
|September 17, 2025
概括
根的寿命对生态系统过程至关重要,受到土壤微生物和营养素的重大影响,而不仅仅是建筑成本. 这项研究揭示了真菌和细菌等生物因素如何影响亚热带森林中的根寿命.
科学领域:
- 生态生态学 生态生态学
- 植物生物学 植物生物学
- 土壤科学 土壤科学
背景情况:
- 根的寿命是生态系统碳和营养循环的关键决定因素.
- 经济理论主要将根的寿命与建筑成本联系起来,忽视了生物影响.
- 外在生物因素对根的寿命的影响,特别是在亚热带森林中,人们对其了解甚少.
研究的目的:
- 调查影响亚热带树木吸收根寿命的因素.
- 量化生物和非生物因素对根寿命变化的贡献.
- 开发一个全球数据集,用于比较整个生物群的根寿命.
主要方法:
- 来自一个亚热带常见花园实验的61,221张图像的分析.
- 量化影响16种树木根寿命的21个因素.
- 全球吸收性根寿命数据集的开发.
主要成果:
- 亚热带吸收根的寿命从91天到545天不等,比北极森林更短.
- 根中的度解释了根寿命变化的45%.
- 植物病原菌,细菌和线虫共同解释了36%的变异,病原体的影响更强.
结论:
- 生物相互作用,特别是致病性微生物和土壤营养素,是亚热带森林根寿命的主要驱动因素.
- 根的寿命是由内在 () 和外在 (生物) 因素的复杂相互作用形成的.
- 结果提供了对根寿命调节及其生态系统影响的全面理解.
更多相关视频
相关概念视频
Energy Budgets
10.6K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
10.6K
Epiphytes, Parasites, and Carnivores
16.6K
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...
16.6K
Life Histories
22.5K
Overview
22.5K
Water and Mineral Acquisition
35.3K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
35.3K
Primary and Secondary Growth in Roots and Shoots
60.1K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
60.1K
Adaptations that Reduce Water Loss
27.9K
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.
27.9K


