土地利用变化改变了碳和的动态,由土壤聚合物中的真菌功能协会介导
Chenggang Liu1, Yanqiang Jin1, Fangmei Lin2
1CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China.
The Science of the total environment
|August 6, 2023
概括
土地利用变化影响土壤碳和的动态,真菌群落发挥着关键作用. 农林系统可以增强土壤功能,特别是在较小的土壤聚合物中.
科学领域:
- 土壤科学 土壤科学
- 生态生态学 生态生态学
- 菌类学 菌类学是指菌类学.
背景情况:
- 土地利用变化严重威胁到土壤的生物多样性和生态功能.
- 土地利用转型对土壤碳 (C) 和 (N) 动态的影响,特别是土壤聚合物中的真菌群落,尚不清楚.
研究的目的:
- 调查土地利用变化 (森林转向单种植和农业林业) 如何影响不同土壤聚合物大小的土壤C和N池,酶活动和真菌群落.
- 阐明真菌功能协会在调解不同土地使用类型下的土壤C和N动态在总体水平上的作用.
主要方法:
- 分析了土壤的C和N池,酶活动,真菌群体组成和功能协会,三种总体大小 (>2毫米,0.252毫米,<0.25毫米) 的分析.
- 通过自然森林,12岁和24岁的单种植,以及中国热带地区相应的农业林业系统进行比较.
- 统计分析以确定真菌协会,土壤特性 (如pH) 和聚合物相关的C和N动态之间的关系.
主要成果:
- 森林转化为单种植减少了土壤C和N池,而农林业减少了微生物生物质C和N,但增强了C和N降解酶活动.
- 土壤C和N池和酶活动随着总体大小的减少而增加.
- 森林转型后,真菌群落从复制性转移到寡合性和病原性真菌,在微聚合物中, saprotrophic真菌的多样性最高.
结论:
- 的功能性协会是土壤C和N动态的总体水平的关键驱动因素,受土壤pH的影响.
- 总体大小显著介导着真菌群落和土壤C/N池之间的关系.
- 研究结果为热带树木种植园的可持续管理提供了洞察力,强调了真菌群落在土壤健康中的作用.
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