Effects of mixed-species litter on bacterial and fungal lignocellulose degradation functions during litter decomposition

Zhang, Qian; Sun, Xiaomei; Chen, Dongsheng; Insam, Heribert; Koide, Roger T.; Wang, Wenbo

doi:10.1016/j.soilbio.2019.107690

Cited by 61 publications

(39 citation statements)

References 66 publications

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“…Therefore, it is of interest to further investigate the dynamics of microbial interaction during the succession process. Compared to either pure conifer or broadleaved forest, the mixed litters in mixed forest can promote the microbial degradation, resulting in an increase of SOC (Wang, Li, et al., 2020). In addition, the secondary plants during the succession grow faster and consume more nutrients including SOC (Lajtha, 2020), which might contribute to the lower SOC in pure Liquidambar forest.…”

Section: Discussionmentioning

confidence: 99%

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

Liu

et al. 2020

Functional Ecology

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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.

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Section: Discussionmentioning

confidence: 99%

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

Liu

et al. 2020

Functional Ecology

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“…The decomposition rate was reduced in the late stages after easily degradable compounds were consumed in the early period [11]. In these later stages, the remaining substrate was largely made up of recalcitrant compounds, such as lignocellulose, which can be degraded by limited types of microorganisms that produce specific extracellular enzymes [56]. Among these, peroxidases are essential lignin-decomposing enzymes [57].…”

Section: Discussionmentioning

confidence: 99%

Litter Decomposition and Nutrient Dynamics in Fire-Affected Larch Forests in the Russian Far East

Bryanin

Kondratova

Abramova

2020

Forests

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Russian boreal forests hold a considerable carbon (C) stock and are subjected to frequent surface fires that unbalance C storage and ecosystem function. Although postfire ecological changes aboveground are well understood, biological C flows (e.g., decomposition in the postfire period) remain unclear. We present the results of a long-term field litterbag experiment on needle litter decomposition in typical Larix gmelinii boreal forests in the Russian Far East. For 3 years, we measured mass loss, C and nitrogen (N) concentrations, lignin and manganese dynamics, respiration intensity and enzyme activity in decaying needles, and environmental conditions (temperature and litter moisture). The decomposition rate at 850 days was 0.435 and 0.213 yr−1 in a control forest and in a forest 15 years after a surface fire, respectively. Early stages of needle decay did not differ among sites, whereas decomposition slowed in later stages in burned forest relative to the control (p < 0.01). This was supported by hampered respiration, slow lignin accumulation in decaying needles, and low peroxidase activity in burned forest. We found no direct N release, and decaying litter immobilization was more pronounced in the control forest. In the later stages, we revealed restrained mass loss and associated C release from larch litter in burned forest. Slow and delayed N release may alter organic matter accumulation, the N cycle, and regeneration of the fire-disturbed larch ecosystem. Our investigations highlight hampered C flow from aboveground litter to soil humus even decades after surface fire in a larch ecosystem. Given the climate-induced increase of fire activity, C retained in the litter layer represents a pool that is more vulnerable to the next fire event.

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“…To obtain information about the diversity of functional genes and the functional potential of soil microbiology, microbial community profiles have been characterized by metagenomic sequencing [25]. Metagenomics is used to directly detect and quantify DNA sequences, thus avoiding the trouble of PCR amplification bias and providing annotation of functional capabilities via gene enrichment analysis [26,27].…”

Section: Introductionmentioning

confidence: 99%

“…Knowledge of the abundance of genes coding for specific enzymes in the soil metagenomes can help us understand the functional potential of microorganisms in SOC sequestration [24]. Compared to 16S rRNA-based measurements, examining the gene characteristics of microorganisms based on their functional capabilities is a better tool for deducing changes in microbial functions' responses to environmental changes [25]. To deeply study the effects of tillage on the C sequestration potential of microbial communities, we conducted a site-specific field experiment of tillage methods (e.g., no tillage (NT), deep tillage (DT), and rotary tillage (RT)) under a maize-wheat double cropping system in the North China Plain.…”

Section: Introductionmentioning

confidence: 99%

Tillage Practice Impacts on the Carbon Sequestration Potential of Topsoil Microbial Communities in an Agricultural Field

Dai

Zhang

et al. 2020

Agronomy

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Soil microorganisms are the core force driving the conversion of plant residues into soil organic carbon (SOC). Identifying the changes in soil microorganism responses to tillage practices is a key step in understanding the SOC sequestration potential. The aim of this study is to assess the impacts of different tillage practices on microbial communities and functions in agricultural soils. A field experiment involving no tillage (NT), rotary tillage (RT), and deep tillage (DT) in winter wheat-summer maize double cropping was performed to determine the structure of the microbial community and its functions using metagenomics. We found that tillage practices changed the composition of soil microbial communities and their functions related to the C cycle. The relative abundance of fungi in DT was significantly higher than that of the NT and RT treatments and primarily facilitated the growth of the fungi community. Moreover, DT treatment increased the relative abundance of genes involved in carbohydrate transport and metabolism genes and carbohydrate metabolism pathway genes, in addition to those encoding carbohydrate-binding modules. Therefore, we concluded that DT increases the transformation potential of straw-C to SOC in the North China Plain where large amounts of wheat and maize straw are returned to the field every year.

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Effects of mixed-species litter on bacterial and fungal lignocellulose degradation functions during litter decomposition

Cited by 61 publications

References 66 publications

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

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

Litter Decomposition and Nutrient Dynamics in Fire-Affected Larch Forests in the Russian Far East

Tillage Practice Impacts on the Carbon Sequestration Potential of Topsoil Microbial Communities in an Agricultural Field

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