Shifts of understory vegetation induced by thinning drive the expansion of soil rare fungi

The gap formation due to forest thinning regulates the understorey microclimate, ground vegetation, and soil biodiversity. However, little is known about abundant and rare taxa's various patterns and assemblage mechanisms under thinning gaps. Thinning gaps with increasing sizes (0, 74, 109, and 196 m2) were established 12 years ago in a 36-year-old spruce plantation in a temperate mountain climate. Soil fungal and bacterial communities were analyzed by MiSeq sequencing and related to soil physicochemical properties and aboveground vegetation. The functional microbial taxa were sorted by FAPROTAX and Fungi Functional Guild database. The bacterial community stabilized under varied thinning intensities and was not different from the control plots, whereas the richness of the rare fungal taxa was at least 1.5-fold higher in the large gaps than in the small ones. Total phosphorus and dissolved organic carbon were the main factors influencing microbial communities in soil under various thinning gaps. The diversity and richness of the entire fungal community and rare fungal taxa increased with the understorey vegetation coverage and shrub biomass after thinning. Gap formation by thinning stimulated the understorey vegetation, the rare saprotroph (Undefined Saprotroph), and mycorrhizal fungi (Ectomycorrhizal-Endophyte-Ericoid Mycorrhizal-Litter Saprotroph-Orchid Mycorrhizal and Bryophyte Parasite-Lichen Parasite-Ectomycorrhizal-Ericoid Mycorrhizal-Undefined Saprotroph), which may accelerate nutrient cycling in forest ecosystems. However, the abundance of Endophyte-Plant Pathogens increased by eight times, which showed the potential risk for the artificial spruce forests. Thus, fungi may be the driving force of forest restoration and nutrient cycling under the increasing intensity of thinning and may induce plant diseases. Therefore, vegetation coverage and microbial functional diversity should be considered to evaluate the sustainability of the artificial forest ecosystem and forest restoration. © 2023 Elsevier Ltd

Авторы
Qiang W. , Gunina A. , Kuzyakov Y. , Luo R. , Zhang Y. , Liu B. , Pang X.
Издательство
Academic Press
Язык
Английский
Статус
Опубликовано
Номер
118119
Том
342
Год
2023
Организации
  • 1 CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, 610041, China
  • 2 University of Chinese Academy of Sciences, Beijing, 100049, China
  • 3 Department of Environmental Chemistry, University of Kassel, Witzenhausen, Germany
  • 4 Department of Soil Biology and Biochemistry, Dokuchaev Soil Science Institute, Russian Federation
  • 5 Tyumen State University, Tyumen, 625003, Russian Federation
  • 6 Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Goettingen, Göttingen, Germany
  • 7 Peoples Friendship University of Russia (RUDN University), Moscow, 117198, Russian Federation
  • 8 Institute of Environmental Sciences, Kazan Federal University, Kazan, 420049, Russian Federation
  • 9 Department of Environment and Geography, University of York, Heslington, North Yorkshire, York, United Kingdom
Ключевые слова
Forest plantations; Human disturbance; Microbial community; MiSeq sequencing; Plant diversity and biomass; Spruce
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