在干扰驱动的森林生态系统转换过程中,土壤微生物群的反
Amelia R Nelson1, Timothy S Fegel2, Robert E Danczak3
1Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523, United States.
The ISME journal
|March 19, 2024
概括
堆燃烧对森林土壤微生物产生影响,最初减少了真菌多样性并改变了碳循环. 然而,土壤微生物在60年内基本恢复,尽管持续的植被变化,但显示出弹性.
科学领域:
- 林业科学 林业科学
- 土壤科学 土壤科学
- 微生物生态学 微生物生态学
背景情况:
- 森林干扰,如木燃烧,显著改变生态系统轨迹和土壤微生物群.
- 清除采摘后燃烧堆会产生与非木质植物的开口,与再生森林形成鲜明对比.
研究的目的:
- 为了调查土壤微生物过程是否反映了土壤上方的植被,堆烧后的植被变化.
- 评估与再生森林相比,在烧伤痕开口中长期恢复土壤微生物群.
主要方法:
- 研究了60年时间序列的烧伤痕开口和相邻的再生森林.
- 分析了土壤中生菌菌的真菌多样性和微生物碳循环功能.
- 检查了土壤呼吸及其与基质可用性和质量的关系.
主要成果:
- 在燃烧后的第一个十年里,菌菌的菌种多样性下降,与草本植物占主导地位相关.
- 烧伤痕中的短期土壤微生物组功能类似于火灾后的条件,碳循环发生变化.
- 六十年后,土壤微生物组的组成和功能在燃烧痕和森林之间趋同,尽管植被不同.
结论:
- 土壤微生物过程最初反映了堆烧后地面植被的变化.
- 土壤微生物组的长期融合表明了显著的微生物弹性,可能独立于植被.
- 了解这些地下动态对于管理面临气候变化驱动的干扰日益增加的森林至关重要.
相关概念视频
Ecological 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
The Soil Ecosystem
19.8K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
19.8K
Ecological Succession
17.2K
Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
17.2K
The Roles of Bacteria and Fungi in Plant Nutrition
35.3K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.3K
Bioremediation
18.3K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.3K
What are Biogeochemical Cycles?
31.7K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
31.7K


