Growing seasonal characteristics of soil and plants control the temporal patterns of bacterial communities following afforestation

Han, Xinhui; Ren, Chao; Li, Boyong; Yan, Shengji; Fu, Shuyue; Gao, Dexin; Zhao, Fazhu; Deng, Jian; Yang, Gaihe

doi:10.1016/j.catena.2019.03.021

Cited by 11 publications

(9 citation statements)

References 37 publications

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“…It was shown that the progressively increased relative abundance of Proteobacteria following old-field succession was primarily due to the enrichment of Alphaproteobacteria and Gammaproteobacteria, rather than Deltaproteobacteria (Table 2). Proteobacteria (e.g., Alphaproteobacteria and Gammaproteobacteria) are known to be fast-growing copiotrophic groups, abundant in soil with sufficient labile substrates [37,45,71,72]. This was supported by our findings that Proteobacteria, Alphaproteobacteria, and Gammaproteobacteria were strongly associated with LB, SOC, WSOC, SON, and NH 4 + -N (Table S5; Figure 7).…”

Section: Discussionsupporting

confidence: 79%

“…Previous studies revealed that secondary succession of old-field greatly decreased soil erosion [7], modified the properties of plants and soil [43], as well as the accumulation and stabilization of soil organic C and N on the LPC [43,44]. Further reports quantified the responses of soil microbial or bacterial communities to afforestation [45], and/or secondary succession of old-field in the short-term (less than 60 years) [21][22][23]. However, the impacts of long-term old-field succession on soil bacterial abundance, diversity, and community composition following a chronosequence have received little attention.…”

Section: Introductionmentioning

confidence: 99%

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Increased Soil Bacterial Abundance but Decreased Bacterial Diversity and Shifted Bacterial Community Composition Following Secondary Succession of Old-Field

Yang

Cai²,

Wang³

et al. 2022

Forests

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Plant secondary succession is a very effective approach for the rejuvenation of degraded ecosystems. In order to comprehend alterations and driving mechanisms of soil bacterial communities under secondary succession of old-field and reveal their subsequent impacts on the decomposition and accumulation of soil organic carbon (SOC) and nitrogen (SON), we investigated changes in soil bacterial communities following ~160 years of old-field succession on the Loess Plateau of China through analyses of quantitative polymerase chain reaction (qPCR) and Illumina MiSeq DNA sequencing of 16S rRNA genes. Our results revealed that subsequent to secondary succession of old-field, soil bacterial abundance progressively increased, while bacterial richness and diversity significantly decreased. Principal component analysis and Bray–Curtis similarity index showed that bacterial community composition gradually shifted following old-field succession. Specifically, the relative abundances of Proteobacteria, Rokubacteria, and Verrucomicrobia progressively increased, while Actinobacteria and Firmicutes slightly decreased following old-field succession. The most enriched of Proteobacteria (e.g., Rhizobiales, Xanthobacteraceae, Gammaproteobacteria, Bradyrhizobium, Rhizobiaceae, and Mesorhizobiur) were found in a climax forest, while Chloroflexi and Gemmatimonadetes had the lowest relative abundances. Further, the most enriched members of Actinobacteria, including Geodermatophilaceae, Frankiales, Blastococcus, Micrococcales, Micrococcacea, Propionibacteriales, Nocardioidaceae, Nocardioide, and Streptomycetaceae, were exhibited in the farmland stage. Our results suggested that secondary succession of old-field greatly modified soil bacterial communities via the transformation of soil nutrients levels, altering plant biomass and soil physiochemical properties. Soil bacterial community composition was transformed from oligotrophic groups to copiotrophic Proteobacteria following old-field succession, which may promote SOC and SON accumulation through increasing the utilization of labile organic carbon (C) and nitrogen (N), while decreasing decomposition of recalcitrant organic C and N from the early- to late-successional stages.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Increased Soil Bacterial Abundance but Decreased Bacterial Diversity and Shifted Bacterial Community Composition Following Secondary Succession of Old-Field

Yang

Cai²,

Wang³

et al. 2022

Forests

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“…The results showed that forest succession affected the characteristics of soil bacteria, including changes in bacterial diversity and the abundance of Acidobacteria, increased the structure of aromatics‐C, and finally reduced the SMR, through SOC content and C:N ratio (Figure 7). Consistent with previous studies, SOC content and C:N ratio affect microbial community characteristics (Han et al, 2019). However, it should be noted that the C:N ratio gradually increased and the C:P ratio gradually declined with the succession of the forest, which indicated that nutrient limits shifted from phosphorus to nitrogen at the later stages of forest succession (Figure S4).…”

Section: Discussionsupporting

confidence: 91%

Section: Environmental Variables Driving Soc Mineralization Through S...supporting

confidence: 91%

The contributions of soil biochemical characteristics and soil organic carbon (SOC) structure to SOC mineralization rate during forest succession on the Loess Plateau, China

Zhang

Liu

Liu³

et al. 2022

Land Degrad Dev

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Soil organic carbon (SOC) mineralization is a process driven by microorganisms and is considered to be one of the main forms of carbon loss in land restoration. However, the interaction of SOC structures and bacteria that drive SOC mineralization remain unclear. Therefore, four forest succession stages were investigated on the Loess Plateau of Northern China: (1) primary stage Betula platyphylla (BP); (2) transitional stage which were two mixed communities of Populus davidiana and Quercus wutaishanica with different proportions (PQ1); (3) (PQ2) and (4) the late stage was climax communities of Quercus wutaishanica (QW). The Illumina sequencing of the 16S rRNA gene and Fourier transformation infrared (FTIR‐ATR) spectroscopy were used to clarify the regulation mechanism of microbial activity on SOC mineralization during forest succession through the perspective of SOC structures. Our results indicated higher aromatics‐C in QW contributed to decreased SOC mineralization ratio (SMR). Redundancy analysis confirmed SOC structures–bacteria interaction and revealed the groups Acidobacteria correlated with recalcitrant SOC structures while Proteobacteria and Bacteroides correlated with labile SOC structures, respectively. Moreover, the partial least squares path model revealed that the SOC and C:N ratio act on soil bacteria community characteristics, and the higher abundance of Acidobacteria and the increase of aromatics‐C decreased SMR. Collectively, these findings highlight the importance of bacteria–SOC structures interaction in decreased SMR and contribute to an improved understanding of how forest succession regulates carbon mineralization.

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“…The diversity, composition, and association of soil microbes are sensitive to vegetation‐related land‐use changes. Afforestation has been shown to significantly increase soil microbial and functional diversity in upper soil horizons in various ecosystems (Han et al, 2019; Hu et al, 2019; Mukhopadhyay & Joy, 2010; Zhong et al, 2020). Afforestation usually increases microbial functionality (increased decomposition and decreased microbial nutrient limitation) in surface soils by directly or indirectly altering soil environments, such as nutrient availability, pH, porosity, soil moisture, and temperature (Cui et al, 2019; Yin et al, 2014; Zhong et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Afforestation can lower microbial diversity and functionality in deep soil layers in a semiarid region

Kong

Wei

et al. 2022

Global Change Biology

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Afforestation is an effective approach to rehabilitate degraded ecosystems, but often depletes deep soil moisture. Presently, it is not known how an afforestation‐induced decrease in moisture affects soil microbial community and functionality, hindering our ability to understand the sustainability of the rehabilitated ecosystems. To address this issue, we examined the impacts of 20 years of afforestation on soil bacterial community, co‐occurrence pattern, and functionalities along vertical profile (0–500 cm depth) in a semiarid region of China's Loess Plateau. We showed that the effects of afforestation with a deep‐rooted legume tree on cropland were greater in deep than that of in top layers, resulting in decreased bacterial beta diversity, more responsive bacterial taxa and functional groups, increased homogeneous selection, and decreased network robustness in deep soils (120–500 cm). Organic carbon and nitrogen decomposition rates and multifunctionality also significantly decreased by afforestation, and microbial carbon limitation significantly increased in deep soils. Moreover, changes in microbial community and functionality in deep layer was largely related to changes in soil moisture. Such negative impacts on deep soils should be fully considered for assessing afforestation's eco‐environment effects and for the sustainability of ecosystems because deep soils have important influence on forest ecosystems in semiarid and arid climates.

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Growing seasonal characteristics of soil and plants control the temporal patterns of bacterial communities following afforestation

Cited by 11 publications

References 37 publications

Increased Soil Bacterial Abundance but Decreased Bacterial Diversity and Shifted Bacterial Community Composition Following Secondary Succession of Old-Field

Increased Soil Bacterial Abundance but Decreased Bacterial Diversity and Shifted Bacterial Community Composition Following Secondary Succession of Old-Field

The contributions of soil biochemical characteristics and soil organic carbon (SOC) structure to SOC mineralization rate during forest succession on the Loess Plateau, China

Afforestation can lower microbial diversity and functionality in deep soil layers in a semiarid region

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