Key Laboratory of State Forestry Administration on Forest Resources Conservation and Ecological Safety in the Upper Reaches of the Yangtze River; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China.
Sichuan Province Key Laboratory of Ecological Security and Protection, Mianyang Normal University, Mianyang, 621000, China.
Appl Microbiol Biotechnol. 2019 Apr;103(7):3215-3224. doi: 10.1007/s00253-018-09582-1. Epub 2019 Jan 29.
The forest gap crucially influences forest environments, but its effects on local fungal community assembly are not fully understood. In this study, the fungal community in a weeping cypress forest was investigated as a function of forest gap locations based on forest clearing, using amplicon sequencing of the ITS2 region. The results showed that the fungal community significantly varied with the variations in soil properties related to gap location. Deterministic processes played pivotal roles in fungal community assembly, which was mainly driven by the temperature, moisture, available nitrogen, and microbial carbon in soil. Beta diversity of the fungal community increased from the gap center to the closed canopy. The relative abundances of dominant orders such as Microascales, Sordariales, and Chaetothyriales regularly varied as a function of gap location, and they were potential indicators for different gap locations. Based on network analysis, gap locations caused distinct co-occurrence patterns of fungal communities. This study shed light on the roles of forest gaps in the assembly of local fungal communities and provided additional strategies to manage forest ecosystems.
森林空隙对森林环境至关重要，但人们对其如何影响局部真菌群落组装过程还不完全了解。本研究以林窗清理为基础，采用 ITS2 区扩增子测序方法，基于林窗位置，调查了落羽杉林的真菌群落，结果表明，真菌群落与林窗位置相关的土壤特性变化显著相关。确定性过程在真菌群落组装中发挥了关键作用，主要受土壤温度、水分、有效氮和微生物碳的驱动。真菌群落的β多样性从林窗中心到郁闭树冠逐渐增加。主要目级如 Microascales、Sordariales 和 Chaetothyriales 的相对丰度随林窗位置的变化而规律变化，它们是不同林窗位置的潜在指示物。基于网络分析，林窗位置导致了真菌群落的不同共生模式。本研究揭示了森林空隙在局部真菌群落组装中的作用，并为管理森林生态系统提供了额外的策略。
