Woody debris storage and its distribution of dark coniferous forest in the alpine-gorge area

Xiao, 肖洒; Fuzhong, 吴福忠 Wu; Yi, 曹艺 Cao; Wanqin, 杨万勤 Yang; Chang, Chenhui; Jun, 黎军 Li; Bin, 王滨 Wang

doi:10.5846/stxb201407171458

Cited by 7 publications

(6 citation statements)

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“…The alpine forest located in the upper reaches of the Yangtze River and the eastern Qinghai-Tibet Plateau plays important roles in holding fresh water, sequestering carbon and indicating climate change [ 19 , 20 ]. Previous studies have indicated that fallen logs with different decay classes account for 53.00 t·ha -1 in the primary Minjiang fir ( Abies faxoniana ) forest ecosystem [ 21 ] and play crucial roles in nurturing biodiversity, maintaining site productivity and holding water [ 22 ]. However, the changes that occur in the microbial community in different decay classes of fallen logs with critical periods remain unknown.…”

Section: Introductionmentioning

confidence: 99%

The microbial community in decaying fallen logs varies with critical period in an alpine forest

Chang

Yang

et al. 2017

PLoS ONE

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Little information has been available on the shifts in the microbial community in decaying fallen logs during critical periods in cold forests. Minjiang fir (Abies faxoniana) fallen logs in decay classes I-V were in situ incubated on the forest floor of an alpine forest in the eastern Tibet Plateau. The microbial community was investigated during the seasonal snow cover period (SP), snow thawing period (TP), early growing season (EG) and late growing season (LG) using Phosphorous Lipid Fatty Acid (PLFA) analysis. Total microbial biomass and microbial diversity in fallen logs were much more affected by critical period than decay class, whereas decay class had a stronger effect on microbial diversity than on microbial biomass. Abundant microbial biomass and microbial diversity in logs even without the cover of snow were observed in winter, which could not be linked to thermal insulation by snow cover. The freshly decayed logs functioned as an excellent buffer of environmental variation for microbial organisms during the sharp fluctuations in temperature in winter. We also found distinct decay patterns along with seasonality for heartwood, sapwood and bark, which requires further detailed research. Gram- bacteria mainly dominated the shifts in microbial community composition from SP to EG, while fungi and Gram+ bacteria mainly dominated it from SP to TP. Based on previous work and the present study, we conclude that fallen logs on the forest floor alter ecological processes by influencing microbial communities on woody debris and beneath the soil and litter. Our study also emphasizes the need to maintain a number of fallen logs, especially fresh ones, on the forest floor.

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Section: Introductionmentioning

confidence: 99%

The microbial community in decaying fallen logs varies with critical period in an alpine forest

Chang

Yang

et al. 2017

PLoS ONE

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“…The soil is classi ed as Cambisols and Primosols (Xiao et al 2014). The accumulation of large amounts of woody debris (53 t•ha −1 ) in this region (Xiao et al 2016) plays crucial roles in maintaining soil fertility, controlling soil erosion and promoting biodiversity. The trees consist mainly of Minjiang r (Abies faxoniana), cypress (Sabina saltuaria), larch (Larix mastersiana) and red birch (Betula albosinensis), with Minjiang r accounting for 80% of the total basal area at the site (Xiao et al 2014).…”

Section: Site Descriptionmentioning

confidence: 99%

Decaying Logs Enrich Soil Fungal Communities in the Forest Ecosystem

Wang

Peñuelas

Tan

et al. 2021

Preprint

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Aims: Soil fungi are crucial drivers of log decomposition in forest ecosystems. The objective of this study was thus to assess the conservation roles of decaying logs on soil fungi.Methods: Five classes of decaying Minjiang fir (Abies faxoniana) logs were incubated on the forest floor in a subalpine coniferous forest on the eastern Qinghai-Tibet Plateau, China, and the fungal communities compositions of the soil under decaying logs were assessed using high-throughput sequencing. Results: A total of 4321 operational taxonomic units (OTUs) were detected by Illumina MiSeq sequencing analysis. Basidiomycota and Ascomycota were dominant phyla regardless of log decay classes. With the log decomposition, the proportion of arbuscular mycorrhiza, wood saprotroph and saprotroph increased, but that of ectomycorrhiza decreased. Moreover, the diversity of soil fungal communities also increased along the decomposing process of logs. The decaying logs significantly altered soil fungal community composition by affecting biochemical properties (e.g. pH and concentrations of microbial biomass nitrogen and total phosphorus) and environmental factors (e.g. soil water content). Conclusion: Different decay classes of logs favor special fungal species, implying that the logs conservation with different decay classes in the forest ecosystem is of great significance for improving the diversity of soil fungi.

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“…The soils include Cambisols and Primosols. Large amounts of woody debris (53 t/ha) (Xiao et al, 2016) are accumulated in this region because of low microbial activity (Chang et al, 2017) Wilson dominate the tree canopy in this region. In the target plots the average proportion of A. faxoniana basal area is almost 80% of total stand basal area (Xiao et al, 2016).…”

Section: Study Areamentioning

confidence: 99%

Tissue type and location within forest together regulate decay trajectories of Abies faxoniana logs at early and mid-decay stage

Chang

Wang

Tan

et al. 2020

Forest Ecology and Management

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Woody debris storage and its distribution of dark coniferous forest in the alpine-gorge area

Cited by 7 publications

References 0 publications

The microbial community in decaying fallen logs varies with critical period in an alpine forest

The microbial community in decaying fallen logs varies with critical period in an alpine forest

Decaying Logs Enrich Soil Fungal Communities in the Forest Ecosystem

Tissue type and location within forest together regulate decay trajectories of Abies faxoniana logs at early and mid-decay stage

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