Land-use type strongly shapes community composition, but not always diversity of soil microbes in tropical China

Cai, Zheng; Zhang, Yonghong; Yu, Chun; Wang, Shu

doi:10.1016/j.catena.2018.02.018

Cited by 67 publications

(42 citation statements)

References 47 publications

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“…The increase in bacterial alpha diversity following conversion to agriculture is consistent with earlier work using pre-next generation sequencing approaches (da Jesus et al, 2009), and is in contrast to commonly reported decreases in the diversity of plants (Ibrahim et al, 2003), animals (Brook et al, 2003;Gardner et al, 2009;Lim, 2017), and fungi (Mueller et al, 2014;McGuire et al, 2015;Kerfahi et al, 2016;Lan et al, 2017;Cai et al, 2018), following agricultural conversion. This may result from ecological differences between bacteria and eukaryotes; for example, bacterial diversity may respond to changes in soil chemical properties, rather than being directly affected by land use change.…”

Section: Diversitysupporting

confidence: 88%

Meta-Analysis Reveals Consistent Bacterial Responses to Land Use Change Across the Tropics

2019

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Bacterial communities are a major component of global diversity and are intimately involved in most terrestrial biogeochemical processes. Despite their importance, we know far less about the response of bacteria to human-induced environmental change than we do about other organisms. Understanding the response of organisms to land use change is especially pressing for tropical rainforests, which are being altered at a higher rate than any other ecosystem. Here, we conduct a meta-analysis of studies performed in each of the major tropical rainforest regions to ask whether there are consistent responses of belowground bacterial communities to the conversion of tropical rainforest to agriculture. Remarkably, we find common responses despite wide variation across studies in the types of agriculture practiced and the research methodology used to study land use change. These responses include changes in the relative abundance of phyla, most notably decreases in Acidobacteria [−1.94 ± 1.1 fold (average ± 95% CI)] and Proteobacteria (−1.38 ± 1.0 fold) and increases in Actinobacteria (1.55 ± 1.1 fold), Chloroflexi (3.47 ± 1.2 fold), and Firmicutes (6.6 ± 1.3 fold). We also find that alpha diversity (at the scale of single soil cores) consistently increases (1.17 ± 1.0 fold) with ecosystem conversion. These consistent responses suggest that, while there is great diversity in agricultural practices across the tropics, common features such as the use of slash-and-burn tactics have the potential to alter bacterial community composition and diversity belowground.

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Section: Diversitysupporting

confidence: 88%

Meta-Analysis Reveals Consistent Bacterial Responses to Land Use Change Across the Tropics

2019

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“…Numerous studies have also found that soil carbon reserves differ according to different land use patterns [48], and the conversion from forests into farmland reduces soil carbon storage [49][50]. Generally, soils under agricultural land uses showed reduced nutrient concentrations, especially for the contents of total C and total N [51]. Deep tillage after the application of fertilizer in the farmland significantly alter the structure of soil by breaking up soil aggregates, and protecting soil physical structure consequently acceleratesthe release of soil organic carbon into the atmosphere [52][53].…”

Section: Soil Chemical Characteristics Under Different Land Use Patternsmentioning

confidence: 99%

Functional Distribution of Bacterial Community under Different Land Use Patterns Based on FaProTax Function Prediction

Liang¹,

Deng²,

Jiang³

et al. 2020

Pol. J. Environ. Stud.

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Soil microorganisms play an important role in biogeochemical cycling. The bacterial community functional community profiles across different land use types in the mountainous region of eastern Liaoning Province, China, such as natural secondary forest (Quercus mongolica (QM)), shrub wood (SW), coniferous planation (Larix gmelini (LG), and Pinus koraiensis (PK)), and agricultural land (Zea mays (ZM)) were evaluated using high-throughput sequencing of the bacterial 16S rDNA gene, and predicted based on the FaProTax database. Bacterial functional groups varied across samples under different land use patterns. A total of 53 functional groups were acquired using FaProTaxin accordance with the classification annotation results of 16S rDNA sequences. These functional groups contained 5809 OTUs, accounting for 66.25% of all OTUs. The dominant functions were chemoheterotrophs and aerobicchemoheterotrophy with average relative abundance of 21.69% and 21.01%, respectively. In addition, we detected 15 and 12 ecological function groups related to the carbon and nitrogen cycles, respectively. The bacterial functional groups of ZM were clearly separated from those of PK, LG, QM, and SW, indicating that functional groups of agriculture soil differed from those of forest soils. Furthermore, the bacterial functional groups of LG and PK were obviously separated from those of QM and SW, suggesting that functional groups of broad leaf forest differed from those of coniferous forests. Also, we analyzed the main factors that influence soil bacterial community functional groups under different land use patterns. It was found that soil environmental conditions, especially soil pH, NH 4

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“…Available P was extracted using 0.5M NaHCO 3 and measured by the molybdenum-blue method [43]. The determination of hydrolysable nitrogen was used to alkali-hydrolysed reduction diffusing method [44]. The concentration of dissolved organic carbon (DOC) was estimated from fresh soil with deionized water (1:5 soil: water) [45] and measured using a multi N/C 3100 TOC analyzer (Analytik Jena, AG, Jena, DE).…”

Section: Determination Of Soil Characteristicsmentioning

confidence: 99%

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

Deng

Zhu

Zhou

et al. 2019

Forests

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Different revegetatiom types can affect the chemical composition of soil organic carbon (SOC), soil microbial community and the functional genes related to carbon cycle. However, the relationships between SOC chemical functional groups and soil microbial communities and the functional genes remains poorly unclear under different revegetation types. Using the solid-state 13C nuclear magnetic resonance (NMR) spectroscopy, we examined changes in the SOC chemical composition of five soils (0–10 cm depth) from Larix gmelinii Rupr. (LG), Pinus koraiensis Sieb. (PK), Quercus mongolica Fisch. (QM), Juglans mandshurica Maxim. (JM), and conifer-broadleaf forest (CB). And the soil microbial community genes related to metabolism of macro-molecular compounds were determined via whole genome shotgun based on Illumina HiSeq. Our results indicated that broadleaf forests (JM, QM) had increased the contents of soil total carbon (C), total nitrogen (N), dissolved organic carbon (DOC), and microbial biomass carbon (MBC), compared with coniferous forests (LG, PK) and the conifer-broadleaf forest (CB). While, the coniferous forests generated a lower O-alcoxyl C, a higher alkyl C, and the ratio of alkyl C/O-alkyl C than broadleaf forests. A total of four kingdoms were identified via whole metagenome shotgun sequencing, including eight archaea, 55 bacteria, 15 eukaryota, and two viruses, giving a total 80 phyla. The contents of alkyne C, phenolic C, methoxyl C, COO/NC=O, and alkyl C were strong related to the composition of soil microbial community and their contents illuminated a major part of the variation in soil microbial composition. We detected seven corresponding macro-molecular compounds of different organic carbon functional group, and 244 genes related to metabolism across all samples, and soil total C, total N, and DOC could be the main factors for microbial functional gene composition. Interestingly, the relative abundances of different SOC chemical functional groups, the phylogenetic distance for microbes, the genes of C cycling based on the KEGG database, and the relative abundance of genes related to metabolism of macro-molecular compounds of different SOC chemical functional groups under different revegetation types all could be divided into three groups, including PK plus LG, JM plus QM, and CB. Our results also illustrated that variations in SOC chemical functional groups were strongly associated with changes of soil microbial community taxa and functional genes, which might be affected by the changes of soil characteristics.

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Land-use type strongly shapes community composition, but not always diversity of soil microbes in tropical China

Cited by 67 publications

References 47 publications

Meta-Analysis Reveals Consistent Bacterial Responses to Land Use Change Across the Tropics

Meta-Analysis Reveals Consistent Bacterial Responses to Land Use Change Across the Tropics

Functional Distribution of Bacterial Community under Different Land Use Patterns Based on FaProTax Function Prediction

Soil Organic Carbon Chemical Functional Groups under Different Revegetation Types Are Coupled with Changes in the Microbial Community Composition and the Functional Genes

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