Changes in rhizosphere bacterial and fungal community composition with vegetation restoration in planted forests
| Autor: | Robert L. Kallenbach, Xinrong Shi, Gui‐yao Liu, T. Ryan Lock, Zhiyou Yuan, Lois Y. Yuan, Lili Chen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Rhizosphere
biology Ecology Chronosequence Soil Science 04 agricultural and veterinary sciences Soil carbon Vegetation 010501 environmental sciences Development biology.organism_classification 01 natural sciences Actinobacteria 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental Chemistry Ecosystem Restoration ecology 0105 earth and related environmental sciences General Environmental Science Acidobacteria |
| Zdroj: | Land Degradation & Development. 30:1147-1157 |
| ISSN: | 1099-145X 1085-3278 |
| DOI: | 10.1002/ldr.3275 |
| Popis: | Soil microbial communities affect nutrient cycling and ecosystem functioning. However, the variations in microbial diversity and community composition within degraded landscapes remain unclear. Using high‐throughput sequencing of bacterial 16S ribosomal RNA genes and internal transcribed spacer fungal sequences, we investigated the rhizosphere microbial diversity and community of coniferous Pinus tabulaeformis Carr. forests in degraded lands across a chronosequence that spanned over 60 years (10, 25, 40, and 60 years since restoration, four forest stands). We found significant differences in soil bacterial and fungal communities among stand ages. Actinobacteria, Proteobacteria, and Acidobacteria dominated the rhizosphere, whereas Basidiomycota, Ascomycota, and Zygomycota prevailed as fungal components. With stand development, bacterial diversity decreased, but fungal diversity increased. Nonmetric multidimensional scaling analysis separated bacterial community clusters well by stands. Fungal community clusters of 25‐ and 60‐year‐old stands overlapped. The dominant bacteria Acidobacteria showed the highest relative abundance at the 40‐year‐old stands. Soil microbial communities correlated significantly with the macro‐nutrients (soil organic carbon, total nitrogen, and total phosphorous). Additionally, the relative abundance of Acidobacteria at the phylum level correlated positively with soil total phosphorous; Deltaproteobacteria at the class level correlated positively with soil organic carbon and total nitrogen. Thus, restoring vegetation in degraded temperate forests enhanced some macronutrients and influenced microbial communities. Our results revealed that restoring vegetation in degraded lands decreased the diversity of bacterial communities over time. In contrast, the soil fungal diversity increased after restoration, and fungal communities in the 25‐ and 60‐year‐old forest stands overlapped on degraded soils. |
| Databáze: | OpenAIRE |
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