菌增加了草原中的植物多样性和土壤碳储存
Entao Zhang1,2, Yang Wang1, Thomas W Crowther3
1State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
概括
灌木菌 (AM) 菌的共生促进了草原中的土壤有机碳 (SOC) 储存,通过增加植物多样性和地下生物量. 这种效应在地表和地下都显著,特别是有义务和自愿的菌根植物.
科学领域:
- 生态生态学 生态生态学
- 土壤科学 土壤科学
- 菌类学 菌类学是指菌类学.
背景情况:
- 众所周知,状菌根 (AM) 和宿主植物之间的共生关系会影响土壤有机碳 (SOC) 储存.
- 菌根影响的上下文依赖性需要了解它们在广的空间尺度上的影响.
研究的目的:
- 调查树木状菌根 (AM) 菌的共生如何影响草原生态系统中的土壤有机碳 (SOC) 储存.
- 确定植物菌根状况 (强制性,可选性,非菌根) 对中国SOC储存的影响.
- 探索植物多样性和地下生物质分配在调解这些影响中的作用.
主要方法:
- 利用来自中国草原生态系统的2296个现场数据.
- 基于非菌根 (NM),选择性菌根 (FM) 和强制性菌根 (OM) 植物占主导地位,在地表和地下比较SOC储存.
- 分析了植物多样性,地下生物质分配和SOC储存之间的关系.
主要成果:
- 菌根真菌的共生显著增强了SOC在地表和地下的储存.
- 强制性菌根 (OM) 和选择性菌根 (FM) 植物占主导地位的草地系统比非菌根 (NM) 植物占主导地位的草地系统具有更高的SOC储存.
- 温度和降水增加与OM植物相对丰富度较高相对相关,以牺牲FM植物为代价.
结论:
- 灌木菌 (AM) 菌在调节草原生态系统中土壤有机碳 (SOC) 储存方面发挥着至关重要的作用.
- 植物多样性和地下生物质分配是AM真菌影响SOC的关键机制.
- 研究结果提供了对草原对全球变化的反应的见解,特别是关于植物群落的转移和碳封存.
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