Reduction of iron oxides and microbial community composition in iron-rich soils with different organic carbon as electron donors

2020 ◽  
Vol 148 ◽  
pp. 104881 ◽  
Author(s):  
Chang Su ◽  
Meiling Zhang ◽  
Luoying Lin ◽  
Guangwei Yu ◽  
Haitao Zhong ◽  
...  
Keyword(s):  
Microbial Community ◽  
Organic Carbon ◽  
Iron Oxides ◽  
Community Composition ◽  
Microbial Community Composition ◽  
Electron Donors ◽  
Reduction Of Iron

scholarly journals Plant Species-Dependent Effects of Liming and Plant Residue Incorporation on Soil Bacterial Community and Activity in an Acidic Orchard Soil

2020 ◽  
Vol 10 (16) ◽  
pp. 5681
Author(s):  
Xiaodi Liu ◽  
Zengwei Feng ◽  
Yang Zhou ◽  
Honghui Zhu ◽  
Qing Yao
Keyword(s):  
Microbial Community ◽  
Organic Carbon ◽  
Community Composition ◽  
Plant Species ◽  
Soil Ph ◽  
Microbial Community Composition ◽  
Plant Residue ◽  
Acidic Soils ◽  
Residue Incorporation ◽  
Test Plants

Both liming and plant residue incorporation are widely used practices for the amelioration of acidic soils—however, the difference in their effects is still not fully understood, especially regarding the microbial community. In this study, we took the acidic soils from a subtropical orchard as target soils, and implemented liming and plant residue incorporation with a leguminous and a gramineous cover crop as test plants. After six months of growth, soil pH, total organic carbon (TOC), dissolved organic carbon (DOC) and nutrient contents were determined, soil enzymes involving C, N, P cycling were assayed, and microbial communities were also analyzed using Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE). Results showed that liming was more effective in elevating soil pH, while plant residue incorporation exerted a more comprehensive influence—not only on soil pH, but also on soil enzyme activity and microbial community. PCR-DGGE analysis revealed that liming changed the microbial community structure more greatly than plant residue incorporation, while plant residue incorporation altered the microbial community composition much more than liming. The growth responses of test plants to liming and plant residue incorporation depended on plant species, indicating the necessity to select appropriate practice for a particular crop. A further, detailed investigation into the microbial community composition, and the respective functions using metagenomic approach, is also suggested.

scholarly journals Coupled changes in soil organic carbon fractions and microbial community composition in urban and suburban forests

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Xueying Zhang ◽  
Xiaomei Chen ◽  
Muying Liu ◽  
Zhanying Xu ◽  
Hui Wei
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Community Composition ◽  
Microbial Community Structure ◽  
Soil Microorganisms ◽  
Microbial Community Composition ◽  
Soil C ◽  
Suburban Forests

Abstract Climate change and rapid urbanization have greatly impacted urban forest ecosystems and the carbon (C) cycle. To assess the effects of urbanization on forest soil C and soil microorganisms, six natural forests in a highly-urbanized region were selected as the research objects. Soil samples were collected to investigate the content and fractions of the soil organic carbon (SOC), as well as the soil microbial community composition. The results showed that the SOC content and fractions were substantially lower in the urban forests than in the suburban forests. Meanwhile, the total amount of phospholipid fatty acids (PLFAs) at suburban sites was twice more than that at urban sites, with shifts in microbial community structure. The potential differences in C inputs and nutrient limitation in urban forests may aggravate the low quantity and quality of SOC and consequently impact microbial community abundance and structure. Variation in microbial community structure was found to explain the loss of soil C pools by affecting the C inputs and promoting the decomposition of SOC. Therefore, the coupled changes in SOC and soil microorganisms induced by urbanization may adversely affect soil C sequestration in subtropical forests.

Microbial community composition affects soil organic carbon turnover in mineral soils

2017 ◽  
Vol 53 (4) ◽  
pp. 445-456 ◽  
Author(s):  
Axel Don ◽  
Isabelle H. Böhme ◽  
Anja B. Dohrmann ◽  
Christopher Poeplau ◽  
Christoph C. Tebbe
Keyword(s):  
Microbial Community ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Community Composition ◽  
Microbial Community Composition ◽  
Carbon Turnover ◽  
Mineral Soils

scholarly journals Lack of Correlation between Turnover of Low-Molecular-Weight Dissolved Organic Carbon and Differences in Microbial Community Composition or Growth across a Soil pH Gradient

2011 ◽  
Vol 77 (8) ◽  
pp. 2791-2795 ◽  
Author(s):  
Johannes Rousk ◽  
Philip C. Brookes ◽  
Helen C. Glanville ◽  
David L. Jones
Keyword(s):  
Molecular Weight ◽  
Microbial Community ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Community Composition ◽  
Soil Ph ◽  
Predictive Power ◽  
Microbial Community Composition ◽  
Low Molecular Weight ◽  
Soil C

ABSTRACTWe studied how soil pH (pHs 4 to 8) influenced the mineralization of low-molecular-weight (LMW)-dissolved organic carbon (DOC) compounds, and how this compared with differences in microbial community structure. The mineralization of LMW-DOC compounds was not systematically connected to differences in soil pH, consistent with soil respiration. In contrast, the microbial community compositions differed dramatically. This suggests that microbial community composition data will be of limited use in improving the predictive power of soil C models.

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