Forest-to-agriculture conversion in Amazon drives soil microbial communities and N-cycle

Merloti, Luís Fernando; Mendes, Lucas William; Pedrinho, Alexandre; Souza, Leandro Fonseca de; Ferrari, Beatriz Maria; Tsai, Siu Mui

doi:10.1016/j.soilbio.2019.107567

Cited by 80 publications

(44 citation statements)

References 72 publications

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“…Previous studies have revealed the changes in the soil microbiome (diversity and abundance of various taxa along with community structure) caused by the alteration of land‐use patterns such as the conversion from forests, and grasslands to agricultural uses (Bossio et al, 2005; Guan et al, 2018; Merloti et al, 2019). To date, no studies were found to have been conducted to illustrate the changes in the soil microbiome after the long‐term (more than 10 years) conversion of cropland to Miscanthus .…”

Section: Discussionmentioning

confidence: 99%

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Zhao

Yue

et al. 2021

GCB Bioenergy

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Miscanthus spp. are increasingly cultivated in cropland worldwide due to their bioenergy potential and multiple ecological services. Effects of long‐term cropland‐to‐Miscanthus conversion without N fertilizer on soil microbiome and N cycling largely remain unknown. We aimed to explore the effects of Miscanthus conversion on soil microbiome and N cycling over a 15‐year period. We analyzed diversity, composition, and abundance of bacterial and archaeal communities using 16S rRNA amplicon sequencing, and abundances of N‐cycling‐related genes using quantitative polymerase chain reaction of 0–10 cm soils collected from bare land, cropland, 10‐year Miscanthus × giganteus, and 15‐year Miscanthus sacchriflorus land in Beijing. Conversion decreased soil sand and micro‐aggregate proportion, nitrate N (NiN), available phosphorus levels, conductivity, temperature, and pH, while increasing proportion of soil clay and macro‐aggregate (MAA), soil organic C (SOC), available N (AN), exchangeable Mg2+ (EMg2+), and available potassium (AK) contents as well as microbial C/N. Consequently, diversity, composition, and abundance of soil bacterial community exhibited larger changes than those values of archaeal community after conversion. Soil AP, EMg2+, AK, and SOC were key factors in shifting microbiome from the cropland to Miscanthus pattern. Moreover, abundances of bacterial and archaeal communities and the N fixer gene nifH increased, whereas that of the bacterial ammonia monooxygenase gene decreased. The copies of other N‐cycling‐related genes in the two Miscanthus lands seemed similar to those values of cropland. The nifH copies negatively correlated with soil NiN and positively correlated with AN, EMg2+, ECa2+, SOC, AK, and MAA. We conclude that changes in soil microbiome pattern induced by the variation of soil properties enhance microbial N fixation potential, maintaining stable N levels and robust N cycling with lower N leakage risk after conversion. These results should inspire farmers and governments to large‐scale use Miscanthus on marginal cropland in Northern China.

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Section: Discussionmentioning

confidence: 99%

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Zhao

Yue

et al. 2021

GCB Bioenergy

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“…Five 22 m × 22 m experimental plots were established and treated as the five treatments described above. The area of the experimental plots was large enough to reflect farmers' practices, so no replicates were set up for each plot in our study, and within each plot, a transect with three pseudo-replicates was selected randomly (Merloti et al 2019).…”

Section: Study Site Description and Experiments Designmentioning

confidence: 99%

Variation of Soil Bacterial and Fungal Communities from Fluvo-Aquic Soil Under Chemical Fertilizer Reduction Combined with Organic Materials in North China Plain

Zhang

Zhao

et al. 2020

J Soil Sci Plant Nutr

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“…Agricultural land with less microbial diversity may still reserve some basic functions, including the degradation of cellulose or lignin from plants and soil contaminants ( Griffiths and Philippot, 2013 ). In the Amazon ecosystem, for example, where the forest-to-agriculture conversion resulted in reduced soil microbial community and biochemical activities, the key functions related to N cycling remained ( Merloti et al., 2019 ). Plant richness may also have an effect ( Lamb et al., 2011 ).…”

Section: Functional Microbial Communities In the Soilmentioning

confidence: 99%

High-throughput molecular technologies for unraveling the mystery of soil microbial community: challenges and future prospects

Lahlali

Ibrahim

Belabess

et al. 2021

Heliyon

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Soil microbial communities play a crucial role in soil fertility, sustainability, and plant health. However, intensive agriculture with increasing chemical inputs and changing environments have influenced native soil microbial communities. Approaches have been developed to study the structure, diversity, and activity of soil microbes to better understand the biology and plant-microbe interactions in soils. Unfortunately, a good understanding of soil microbial community remains a challenge due to the complexity of community composition, interactions of the soil environment, and limitations of technologies, especially related to the functionality of some taxa rarely detected using conventional techniques. Culture-based methods have been shown unable and sometimes are biased for assessing soil microbial communities. To gain further knowledge, culture-independent methods relying on direct analysis of nucleic acids, proteins, and lipids are worth exploring. In recent years, metagenomics, metaproteomics, metatranscriptomics, and proteogenomics have been increasingly used in studying microbial ecology. In this review, we examined the importance of microbial community to soil quality, the mystery of rhizosphere and plant-microbe interactions, and the biodiversity and multi-trophic interactions that influence the soil structure and functionality. The impact of the cropping system and climate change on the soil microbial community was also explored. Importantly, progresses in molecular biology, especially in the development of high-throughput biotechnological tools, were extensively assessed for potential uses to decipher the diversity and dynamics of soil microbial communities, with the highlighted advantages/limitations.

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Forest-to-agriculture conversion in Amazon drives soil microbial communities and N-cycle

Cited by 80 publications

References 72 publications

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Cropland‐to‐Miscanthus conversion alters soil bacterial and archaeal communities influencing N‐cycle in Northern China

Variation of Soil Bacterial and Fungal Communities from Fluvo-Aquic Soil Under Chemical Fertilizer Reduction Combined with Organic Materials in North China Plain

High-throughput molecular technologies for unraveling the mystery of soil microbial community: challenges and future prospects

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