scholarly journals Effects of Metal and Metalloid Contamination on Microbial Diversity and Activity in Agricultural Soils

2011 ◽  
Vol 44 (1) ◽  
pp. 146-159 ◽  
Author(s):  
Sherlyn C. Tipayno ◽  
Puneet S. Chauhan ◽  
Sung-Man Woo ◽  
Bo-Hee Hong ◽  
Kee-Woong Park ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Agricultural Soils

scholarly journals Microbial Community Diversity Dynamics in Acid Mine Drainage and Acid Mine Drainage-Polluted Soils: Implication on Mining Water Irrigation Agricultural Sustainability

2021 ◽  
Vol 5 ◽  
Author(s):  
Rabelani Munyai ◽  
Henry Joseph Oduor Ogola ◽  
David Mxolisi Modise
Keyword(s):  
Acid Mine Drainage ◽  
Plant Growth ◽  
Microbial Diversity ◽  
Agricultural Production ◽  
Mine Drainage ◽  
Agricultural Soils ◽  
Soil Health ◽  
Ecological Niches ◽  
Acid Mine ◽  
The Impact

Environmental degradation related to mining-generated acid mine drainage (AMD) is a major global concern, contaminating surface and groundwater sources, including agricultural land. In the last two decades, many developing countries are expanding agricultural productivity in mine-impacted soils to meet food demand for their rapidly growing population. Further, the practice of AMD water (treated or untreated) irrigated agriculture is on the increase, particularly in water-stressed nations around the world. For sustainable agricultural production systems, optimal microbial diversity, and functioning is critical for soil health and plant productivity. Thus, this review presents up-to-date knowledge on the microbial structure and functional dynamics of AMD habitats and AMD-impacted agricultural soils. The long-term effects of AMD water such as soil acidification, heavy metals (HM), iron and sulfate pollution, greatly reduces microbial biomass, richness, and diversity, impairing soil health plant growth and productivity, and impacts food safety negatively. Despite these drawbacks, AMD-impacted habitats are unique ecological niches for novel acidophilic, HM, and sulfate-adapted microbial phylotypes that might be beneficial to optimal plant growth and productivity and bioremediation of polluted agricultural soils. This review has also highlighted the impact active and passive treatment technologies on AMD microbial diversity, further extending the discussion on the interrelated microbial diversity, and beneficial functions such as metal bioremediation, acidity neutralization, symbiotic rhizomicrobiome assembly, and plant growth promotion, sulfates/iron reduction, and biogeochemical N and C recycling under AMD-impacted environment. The significance of sulfur-reducing bacteria (SRB), iron-oxidizing bacteria (FeOB), and plant growth promoting rhizobacteria (PGPRs) as key players in many passive and active systems dedicated to bioremediation and microbe-assisted phytoremediation is also elucidated and discussed. Finally, new perspectives on the need for future studies, integrating meta-omics and process engineering on AMD-impacted microbiomes, key to designing and optimizing of robust active and passive bioremediation of AMD-water before application to agricultural production is proposed.

scholarly journals Evaluation of Changes in Glomalin-Related Soil Proteins (GRSP) Content, Microbial Diversity and Physical Properties Depending on the Type of Soil as the Important Biotic Determinants of Soil Quality

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1279
Author(s):  
Anna Gałązka ◽  
Jacek Niedźwiecki ◽  
Jarosław Grządziel ◽  
Karolina Gawryjołek
Keyword(s):  
Physical Properties ◽  
Microbial Diversity ◽  
Soil Quality ◽  
Agricultural Soils ◽  
Soil Health ◽  
Physical Parameters ◽  
High Biological Activity ◽  
Physical Quality ◽  
Soil Physical Quality ◽  
Soil Proteins

The aim of the study was to evaluate the changes in glomalin-related soil proteins (GRSP) content, microbial diversity and soil physical quality depending on the type of soil measures of soil improvement and changes in soil health. The study was based on a 100-year stationary field microplot experiment where the soil profiles were collected with preserving the natural soil horizons. The microplot experiment was carried out on eight different soil types: Brunic Arenosol (Dystric I), Rendzic Leptosol, Fluvic Cambisol, Haplic Cambisol (Eutric), Gleyic Phaeozem, Brunic Arenosol (Dystric II), Haplic Cambisol (Eutric II) and Haplic Cambisol (Dystric). These soils are the most common types of agricultural soils in Poland. Relatively significant correlations with the soil quality, physical parameters and the glomalin-related soil proteins have been found. The study determined the total GRSP (T-GRSP) and easily extractable GRSP (EE-GRSP) levels in soils as well as the soil physical quality index and soil’s microbial biodiversity. The GRSP depended on the type of soil and correlated with S-Index and also was responsible for the unique chemical and physical properties of soils. Soils characterized by the highest T-GRSP content belonged to the group of very good and good soil physical quality characterized also by high biological activity, for which there were strong correlations with such parameters as dehydrogenase activity (DHA), microbial biomass content (MBC), microbial nitrogen content (MBN) and total bacteria number (B). The highest T-GRSP content and higher microbial diversity were found in Gleyic Phaeozem, Rendzic Leptosol and Fluvic Cambisol. The T-GRSP and EE-GRSP content were additionally correlated with the number of AMF spores. Very poor and poor soil physical quality according to S-Index characterized Brunic Arenosol (Dystric I) and Haplic Cambisol (Dystric). This research indicates that a specific edaphone of soil microorganisms and GRSP content may be of great importance when assessing a soil’s quality and improvements in soil health. The abundance of glomalin-producing fungi significantly affects the quality of the soil. This effect is particularly important for agricultural soils are threatened by ongoing land degradation.

scholarly journals Subsoil Microbial Diversity and Stability in Rotational Cotton Systems

Soil Systems ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 44 ◽  
Author(s):  
Katherine Polain ◽  
Oliver Knox ◽  
Brian Wilson ◽  
Lily Pereg
Keyword(s):  
Microbial Diversity ◽  
Root System ◽  
Beta Diversity ◽  
Agricultural Soils ◽  
Soil Depth ◽  
Alpha Diversity ◽  
Agricultural Management ◽  
Illumina Platform ◽  
Evenness Indices ◽  
Sample Time

Microbial diversity has been well documented for the top 0–0.30 m of agricultural soils. However, spatio-temporal research into subsoil microbial diversity and the effects of agricultural management remains limited. Soil type may influence subsoil microbial diversity, particularly Vertosols. These soils lack distinct horizons and are known to facilitate the downward movement of organic matter, potentially supporting subsoil microbiota, removed from the crop root system (i.e., bulk soils). Our research used the MiSeq Illumina Platform to investigate microbial diversity down the profile of an agricultural Australian Vertosol to 1.0 m in bulk soils, as influenced by crop system (continuous cotton and cotton–maize) and sample time (pre- and in-crop samples collected over two seasons). Overall, both alpha- (Chao1, Gini–Simpson Diversity and Evenness indices) and beta-diversity (nMDS and Sørensen’s Index of Similarity) metrics indicated that both bacterial (16S) diversity and fungal (ITS) diversity decreased with increasing soil depth. The addition of a maize rotation did not significantly influence alpha-diversity metrics until 0.70–1.0 m depth in the soil, where bacterial diversity was significantly higher in this system, with beta-diversity measures indicating this is likely due to root system differences influencing dissolved organic carbon. Sample time did not significantly affect bacterial or fungal diversity over the two seasons, regardless of the crop type and status (i.e., crop in ground and post crop). The relatively stable subsoil fungal and overall microbial diversity in bulk soils over two crop seasons suggests that these microbiota have developed a tolerance to prolonged agricultural management.

Agricultural soils, pesticides and microbial diversity

2014 ◽  
Vol 27 ◽  
pp. 15-20 ◽  
Author(s):  
Carsten Suhr Jacobsen ◽  
Mathis Hjort Hjelmsø
Keyword(s):  
Microbial Diversity ◽  
Agricultural Soils

scholarly journals Urea Amendment Decreases Microbial Diversity and Selects for Specific Nitrifying Strains in Eight Contrasting Agricultural Soils

2018 ◽  
Vol 9 ◽  
Author(s):  
Christopher Staley ◽  
Florence Breuillin-Sessoms ◽  
Ping Wang ◽  
Thomas Kaiser ◽  
Rodney T. Venterea ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Agricultural Soils

scholarly journals Bridging Rare and Abundant Bacteria with Ecosystem Multifunctionality in Salinized Agricultural Soils: from Community Diversity to Environmental Adaptation

mSystems ◽  
2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Wenjie Wan ◽  
Song Liu ◽  
Xiang Li ◽  
Yonghui Xing ◽  
Wenli Chen ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Variable Selection ◽  
Microbial Diversity ◽  
Community Assembly ◽  
Agricultural Soils ◽  
Environmental Adaptation ◽  
Community Diversity ◽  
Soil Restoration ◽  
Α Diversity ◽  
Ecosystem Multifunctionality

ABSTRACT Bacterial diversity and ecosystem multifunctionality (EMF) vary along environmental gradients. However, little is known about interconnections between EMF and taxonomic and phylogenetic diversities of rare and abundant bacteria. Using MiSeq sequencing and multiple statistical analyses, we evaluated the maintenance of taxonomic and phylogenetic diversities of rare and abundant bacteria and their contributions to EMF in salinized agricultural soils (0.09 to 19.91 dS/m). Rare bacteria exhibited closer phylogenetic clustering and broader environmental breadths than abundant ones, while abundant bacteria showed higher functional redundancies and stronger phylogenetic signals of ecological preferences than rare ones. Variable selection (86.7%) dominated rare bacterial community assembly, and dispersal limitation (54.7%) and variable selection (24.5%) determined abundant bacterial community assembly. Salinity played a decisive role in mediating the balance between stochastic and deterministic processes and showed significant effects on functions and diversities of both rare and abundant bacteria. Rare bacterial taxonomic α-diversity and abundant bacterial phylogenetic α-diversity contributed significantly to EMF, while abundant bacterial taxonomic α-diversity and rare bacterial phylogenetic α-diversity did not. Additionally, abundant rather than rare bacterial community function had a significant effect on soil EMF. These findings extend our knowledge of environmental adaptation of rare and abundant bacteria and highlight different contributions of taxonomic and phylogenetic α-diversities of rare and abundant bacteria to soil EMF. IMPORTANCE Soil salinization is a worldwide environmental problem and threatens plant productivity and microbial diversity. Understanding the generation and maintenance of microbial diversity is essential to estimate soil tillage potential via investigating ecosystem multifunctionality. Our sequence-based data showed differences in environmental adaptations of rare and abundant bacteria at taxonomic and phylogenetic levels, which led to different contributions of taxonomic and phylogenetic α-diversities of rare and abundant bacteria to soil EMF. Studying the diversity of rare and abundant bacteria and their contributions to EMF in salinized soils is critical for guiding soil restoration.

Sign in / Sign up

Export Citation Format

Share Document