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Open AccessArticle

Bacterial Community Changes Associated with Land Use Type in the Forest Montane Region of Northeast China

by Shi-Jun Wu 1,†, Jiao-Jiao Deng 1,2,†, You Yin 2,3, Sheng-Jin Qin 2,3, Wen-Xu Zhu 2,3, Yong-Bin Zhou 1,2, Bing Wang 1,*, Honghua Ruan 4 and Long Jin 4,*
1
College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China
2
College of Forestry, Shenyang Agricultural University, Shenyang 110161, China
3
Research Station of Liaohe-River Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Shenyang 112500, China
4
College of Biology and the Environments, Nanjing Forestry University, Nanjing 210037, China
*
Authors to whom correspondence should be addressed.
The authors contributed equally to this work.
Forests 2020, 11(1), 40; https://doi.org/10.3390/f11010040
Received: 15 November 2019 / Revised: 20 December 2019 / Accepted: 23 December 2019 / Published: 27 December 2019
(This article belongs to the Special Issue Relationship between Forest Biodiversity and Soil Functions)
Soil microorganisms play a vital role in the biogeochemical cycle, whereas land use change is one of the primary factors that affects the biodiversity and functionality of terrestrial ecosystems. The composition and diversity of bacterial communities (by high-throughput sequencing of the bacterial 16S rRNA gene) were evaluated in the soils of the Montane Region of Northeast China, across different land use types, e.g., natural secondary forest (Quercus mongolica, QM), shrubland (SL), coniferous plantation (Larix gmelinii, LG, and Pinus koraiensis, PK), and agricultural land (Zea mays, ZM). Significant differences in the chemical characteristics and bacterial communities in soils under different land uses were observed in this study. Soil resident TC (total carbon) and TN (total nitrogen) were much higher in secondary natural forest soils, than in coniferous plantation and agricultural soils. Compared with forest and shrubland soils, soil bacterial OTUs, the Chao1 index, and the ACE index were the lowest in the ZM. There were high proportions of Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Gemmatimonadetes, Verrucomicrobia, Bacteroidetes, Planctomycetes, Saccharibacteria, and Nitrospirae in agricultural and forest soils, which accounted for over 90% of the reads in each sample. We found that the dominant group in the forest and shrubland soils was Proteobacteria, while the most dominant group in the ZM was Actinobacteria. The results of both heatmap and principal component analyses displayed groups according to land use types, which indicated that the bacterial communities in the areas under study were significantly influenced by long term differently managed land use. Furthermore, redundancy and Pearson correlation analyses revealed that the bacterial communities were primarily regulated by soil characteristics. This suggested that altered land use patterns initiated changes in the chemical properties of the soils, which affected the composition of microbial communities in this area. This provides a scientific basis for the evolutionary mechanism of soil quality, as well as the rational development and utilization of land resources. View Full-Text
Keywords: forest; land use type; high-throughput sequencing; bacterial community forest; land use type; high-throughput sequencing; bacterial community
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Wu, S.-J.; Deng, J.-J.; Yin, Y.; Qin, S.-J.; Zhu, W.-X.; Zhou, Y.-B.; Wang, B.; Ruan, H.; Jin, L. Bacterial Community Changes Associated with Land Use Type in the Forest Montane Region of Northeast China. Forests 2020, 11, 40.

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