与宿主树身份相关的真菌成分调解了对木材微生物呼吸的营养添加效应
Zhenhong Hu1,2,3, Marcos Fernández-Martínez3,4, Qinsi He1,5
1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Soil and Water Conservation Science and Engineering (Institute of Soil and Water Conservation), Northwest A&F University, Yangling, Shaanxi, China.
Ecology
|June 26, 2024
概括
添加营养物质可以促进真菌的木材分解,但效果因营养物质类型和树种而异. 显著增加了微生物的呼吸,特别是在体育,影响森林碳循环.
科学领域:
- 生态生态学 生态生态学
- 林业林业 林业 林业 林业
- 微生物学 微生物学
背景情况:
- 对于枯木分解至关重要.
- 人为营养和温度变化影响真菌群落和木材呼吸,但人们对此了解甚少.
研究的目的:
- 研究和的添加和变暖如何影响真菌组成和木材微生物呼吸.
- 为了确定亚热带森林中形木种和高精木种木材分解的后果.
主要方法:
- 用添加和的实地实验.
- 实验室实验与受控的变暖.
- 对真菌群体组成和木材微生物呼吸的分析.
主要成果:
- 添加营养素显著增加了木材微生物呼吸,由真菌组成介导.
- 添加增加了65%的呼吸 (通过减少酸酶活性和增加白色腐烂真菌),而增加了30%的呼吸.
- 对体木的呼吸有更大的影响 (83.3%),而不是血管木 (46.9%),这与Basidiomycota:Ascomycota丰度的变化有关.
结论:
- 树木物种身份通过影响真菌群体,关键调节木材微生物呼吸中的营养反应.
- 对呼吸的变暖影响与营养水平或真菌成分无关.
- 扩大苗的生长范围可能会减少以前由苗占主导地位的地区对森林碳循环的营养影响.
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