The response of the soil bacterial community and function to forest succession caused by forest disease

Abstract

1. Forest succession is a key driver of plant communities and understanding succession is central to forest restoration. Currently, the information on the response of the microbial community to the forest succession process, however, is limited. In the present study, we investigated the dynamics of the soil bacterial community in three forest types undergoing succession caused by pine wilt disease, representing the initial pine forest, gradual mixed pine and broadleaved forest, and eventual broadleaved forest, using Illumina MiSeq coupled with Functional Annotation of Prokaryotic Taxa (FAPROTAX) analysis. 2. The results showed that the soil pH, contents of soil organic carbon (SOC) and soil total nitrogen (TN) increased after the occurrence of initial succession and differed among the forest sites. The mixed pine forest had significantly higher bacteria biomass (p < 0.05), whereas, the total microbial biomass did not differ during the succession. The bacterial community diversity and richness increased significantly following the succession process (p < 0.05). Proteobacteria, Actinobacteria, Acidobacteria and Bacteroidetes were the dominant phyla across the succession, in which the abundance of Bacteroidetes significantly increased (p < 0.05), whereas, Planctomycetes, WPS-2 and Burkholder decreased in abundance after succession occurred (p < 0.05). 3. The three forests formed distinct bacterial community structures during the succession (p < 0.05), whereas, only two functional structures were clustered, in which the mixed and pure broadleaved forest did not differ. The dominant functional groups involved in the C cycle in the initial pure pine forest were replaced gradually by the groups involved in N and S cycles following the subsequent succession. The soil pH, soil TN and SOC were the most important factors affecting the bacterial community and functional structures during the succession. 4. These results indicate that the bacterial community and function shift drastically in the early stages of succession, which reflects the changes in ecological environment caused by succession. The findings provide useful information to better understand the response of microbes to natural forest disturbance and highlight the importance of microbes during forest succession. | 2549 Functional Ecology QU et al.

Microbial diversity regulates ecosystem multifunctionality during natural secondary succession

“…Forest restoration strategies varying from active restoration where anthropogenic interventions influence the successional track of recovery, to passive, such as natural forest recovery have been frequently applied after external disturbances (Stanturf et al, 2014). Enhancing knowledge of forest succession and its relationship with the recovery of ecosystem functions is therefore central to forest managers for climate change mitigation and adaptation (Qu et al, 2020;Satdichanh et al, 2018).…”

“…It has been shown that ectomycorrhizal fungi community was significantly associated with forest succession stages (10-40, 41-80 and >80 years) in Chinese subtropical forests (Gao et al, 2015;Wu et al, 2012). A previous study found that the diversity and richness of bacterial community significantly increased following the succession stages (Qu et al, 2020). However, quantifying individual functions could prohibit the weighing of tradeoffs between ecosystem functions, and provide a biased perception for restoration success (Allan et al, 2015;Garland et al, 2020).…”

Secondary Succession Altered the Diversity and Co-Occurrence Networks of the Soil Bacterial Communities in Tropical Lowland Rainforests

“…The composition, structure, diversity, and interspecies relationship of plant communities changes over time following forests disturbance as a result of both above and underground interactions [ 6 , 7 ]. Plant composition and community structure can affect small-scale environmental changes in forests.…”

Nature Restoration Shifts the Abundance and Structure of Soil Nematode Communities in Subtropical China

“…As secondary stands develop, the increase in vegetation biomass could enhance belowground carbon allocation and subsequently soil organism activity (Francini et al, 2018;Morrien et al, 2017). Accordingly, a recent study reported that the microbial biomass carbon, diversity and richness of bacterial community signi cantly increased following the succession stages (Qu et al 2020). Secondly, forest secondary succession can alter soil properties and competition of resources within a soil nematode community (Cesarz et al, 2013;Eisenhauer et al, 2013;Valladares et al, 2012).…”