scholarly journals Dryland cropping system, weed communities, and disease status modulate the effect of climate conditions on wheat soil bacterial communities.

2020 ◽  
Author(s):  
Suzanne Lynn Ishaq ◽  
Tim Seipel ◽  
Carl Yeoman ◽  
Fabian D Menalled
Keyword(s):  
Soil Temperature ◽  
Bacterial Communities ◽  
Cropping Systems ◽  
Cropping System ◽  
Disease Status ◽  
Climate Conditions ◽  
Soil Bacterial Communities ◽  
Bacterial Richness ◽  
Soil Bacterial ◽  
The Impact

Little knowledge exists on whether soil bacteria are impacted by cropping systems and disease status in current and predicted climate scenarios. We assessed the impact of soil moisture and temperature, weed communities, and disease status on soil bacterial communities across three cropping systems: conventional no-till (CNT) utilizing synthetic pesticides and herbicides, 2) USDA-certified tilled organic (OT), and 3) USDA-certified organic with sheep grazing (OG). Sampling date within the growing season, and associated soil temperature and moisture, exerted the greatest effect on bacterial communities, followed by cropping system, Wheat streak mosaic virus (WSMV) infection status, and weed community. Soil temperature was negatively associated with bacterial richness and evenness, while soil moisture was positively associated with bacterial richness and evenness. Both soil temperature and moisture altered soil bacterial community similarity. Inoculation with WSMV altered community similarity, and there was a date x virus interaction on bacterial richness in CNT and OT systems, as well as an interaction between WSMV x climate. In May and July, cropping system altered the effect of climate change on the bacterial community composition in hotter, and hotter and drier conditions not treated with WSMV, as compared to ambient conditions. In areas treated with WSMV, there were interactions between cropping system, sampling date, and climate conditions, indicating the effect of multiple stressors on bacterial communities in soil. Overall, this study indicates that predicted climate modifications as well as biological stressors play a fundamental role in the impact of cropping systems on soil bacterial communities.

scholarly journals Dryland Cropping Systems, Weed Communities, and Disease Status Modulate the Effect of Climate Conditions on Wheat Soil Bacterial Communities

mSphere ◽  
2020 ◽  
Vol 5 (4) ◽  
Author(s):  
Suzanne L. Ishaq ◽  
Tim Seipel ◽  
Carl Yeoman ◽  
Fabian D. Menalled
Keyword(s):  
Climate Change ◽  
Soil Moisture ◽  
Soil Temperature ◽  
Bacterial Communities ◽  
Cropping Systems ◽  
Cropping System ◽  
Disease Status ◽  
Soil Bacterial Communities ◽  
Weed Communities ◽  
Soil Bacterial

ABSTRACT Little knowledge exists on how soil bacteria in agricultural settings are impacted by management practices and environmental conditions in current and predicted climate scenarios. We assessed the impact of soil moisture, soil temperature, weed communities, and disease status on soil bacterial communities in three cropping systems: (i) conventional no-till (CNT) systems utilizing synthetic pesticides and herbicides, (ii) USDA-certified tilled organic (OT) systems, and (iii) USDA-certified organic systems with sheep grazing (OG). Sampling date within the growing season and associated soil temperature and moisture exerted the greatest effect on bacterial communities, followed by cropping system, Wheat streak mosaic virus (WSMV) infection status, and weed community. Soil temperature was negatively correlated with bacterial richness and evenness, while soil moisture was positively correlated with bacterial richness and evenness. Soil temperature and soil moisture independently altered soil bacterial community similarity between treatments. Inoculation of wheat with WSMV altered the associated soil bacteria, and there were interactions between disease status and cropping system, sampling date, and climate conditions, indicating the effect of multiple stressors on bacterial communities in soil. In May and July, cropping system altered the effect of climate change on the bacterial community composition in hotter conditions and in hotter and drier conditions compared to ambient conditions, in samples not treated with WSMV. Overall, this study indicates that predicted climate modifications as well as biological stressors play a fundamental role in the impact of cropping systems on soil bacterial communities. IMPORTANCE Climate change is affecting global moisture and temperature patterns, and its impacts are predicted to worsen over time, posing progressively larger threats to food production. In the Northern Great Plains of the United States, climate change is forecast to increase temperature and decrease precipitation during the summer, and it is expected to negatively affect cereal crop production and pest management. In this study, temperature, soil moisture, weed communities, and disease status had interactive effects with cropping system on bacterial communities. As local climates continue to shift, the dynamics of above- and belowground associated biodiversity will also shift, which will impact food production and increase the need for more sustainable practices.

scholarly journals Characterisation of Bt maize IE09S034 in decomposition and response of soil bacterial communities

2021 ◽  
Author(s):  
Xiaoli Zhou ◽  
Jingang Liang ◽  
Ying Luan ◽  
Xinyuan Song ◽  
Zhengguang Zhang
Keyword(s):  
Metabolic Activity ◽  
Bacterial Communities ◽  
Bt Maize ◽  
Gm Crop ◽  
Soil Bacterial Communities ◽  
Significant Difference ◽  
Maize Residues ◽  
Soil Bacterial ◽  
June July ◽  
The Impact

Returning straw to the soil is an effective way to improve the soil quality. As genetically modified (GM) crops experience expanded growing scales, returning straw to the soil could also be necessary. However, the impact of GM crop straws on soil safety remains unclear. The environment (including soil types, humidity and temperature) can result in a significant difference in the diversity of soil bacterial communities. Here, we compared the impacts of the straw from Bt maize IE09S034 (IE) and near-isogenic non-Bt maize Zong31 (CK) on soil bacterial community and microbial metabolic activity in three different environments. Sampling was carried out following 6–10 months of decomposition (May, June, July, and August) in three localities in Chinese cities (Changchun, Jinan, and Beijing). Our results showed that Bt maize residues posed no direct impact on soil bacterial communities in contrast to the environment and decomposed time. The microbial functional diversity and metabolic activity showed no significant difference between IE and CK. The results could be a reference for further assessing the effect of Bt maize residues on the soil that promotes the commercialisation of Bt maize IE09S034.

scholarly journals Urbanization and Carpobrotus edulis invasion alter the diversity and composition of soil bacterial communities in coastal areas

2020 ◽  
Vol 96 (7) ◽  
Author(s):  
Ana Novoa ◽  
Jan-Hendrik Keet ◽  
Yaiza Lechuga-Lago ◽  
Petr Pyšek ◽  
Johannes J Le Roux
Keyword(s):  
Community Composition ◽  
Bacterial Communities ◽  
Soil Bacteria ◽  
Coastal Dunes ◽  
Coastal Dune ◽  
Western Coast ◽  
Carpobrotus Edulis ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
The Impact

ABSTRACT Coastal dunes are ecosystems of high conservation value that are strongly impacted by human disturbances and biological invasions in many parts of the world. Here, we assessed how urbanization and Carpobrotus edulis invasion affect soil bacterial communities on the north-western coast of Spain, by comparing the diversity, structure and composition of soil bacterial communities in invaded and uninvaded soils from urban and natural coastal dune areas. Our results suggest that coastal dune bacterial communities contain large numbers of rare taxa, mainly belonging to the phyla Actinobacteria and Proteobacteria. We found that the presence of the invasive C. edulis increased the diversity of soil bacteria and changed community composition, while urbanization only influenced bacterial community composition. Furthermore, the effects of invasion on community composition were conditional on urbanization. These results were contrary to predictions, as both C. edulis invasion and urbanization have been shown to affect soil abiotic conditions of the studied coastal dunes in a similar manner, and therefore were expected to have similar effects on soil bacterial communities. Our results suggest that other factors (e.g. pollution) might be influencing the impact of urbanization on soil bacterial communities, preventing an increase in the diversity of soil bacteria in urban areas.

The presence of tetracycline in cow manure changes the impact of repeated manure application on soil bacterial communities

2016 ◽  
Vol 52 (8) ◽  
pp. 1121-1134 ◽  
Author(s):  
Luigi Chessa ◽  
Sven Jechalke ◽  
Guo-Chun Ding ◽  
Alba Pusino ◽  
Nicoletta Pasqualina Mangia ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Cow Manure ◽  
Manure Application ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
The Impact

scholarly journals Soil bacterial communities in three rice-based cropping systems differing in productivity

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Min Huang ◽  
Alin Tian ◽  
Jiana Chen ◽  
Fangbo Cao ◽  
Yumei Chen ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Cropping Systems ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Distinct soil bacterial communities in response to the cropping system in a Mollisol of northeast China

2017 ◽  
Vol 119 ◽  
pp. 407-416 ◽  
Author(s):  
Junjie Liu ◽  
Zhenhua Yu ◽  
Qin Yao ◽  
Xiaojing Hu ◽  
Wu Zhang ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Northeast China ◽  
Cropping System ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

scholarly journals Effect of Long-Term Cropping Systems on the Diversity of the Soil Bacterial Communities

Agronomy ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 878 ◽  
Author(s):  
Zoltán Mayer ◽  
Zita Sasvári ◽  
Viktor Szentpéteri ◽  
Beatrix Pethőné Rétháti ◽  
Balázs Vajna ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Cropping Systems ◽  
Sustainable Use ◽  
Soil Microbial Communities ◽  
Principal Component ◽  
Crop Rotations ◽  
Soil Bacterial Diversity ◽  
Soil Biodiversity ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

Soil microbial communities are involved in the maintenance of productivity and health of agricultural systems; therefore an adequate understanding of soil biodiversity plays a key role in ensuring sustainable use of soil. In the present study, we evaluated the influence of different cropping systems on the biodiversity of the soil bacterial communities, based on a 54-year field experiment established in Martonvásár, Hungary. Terminal restriction fragment length polymorphism (T-RFLP) fingerprinting technique was used to assess soil bacterial diversity and community structure in maize monoculture and three different crop rotations (maize–alfalfa, maize–wheat and the maize–barley–peas–wheat Norfolk type). No differences in richness and diversity were detected between maize monoculture and crop rotations except for the most intense rotation system (Norfolk-type). Although the principal component analysis did not reveal a clear separation between maize monoculture and the other rotation systems, the pairwise tests of analysis of similarity (ANOSIM) revealed that there are significant differences in the composition of bacterial communities between the maize monoculture and maize–alfalfa rotation as well as between wheat–maize and Norfolk-type rotation.

scholarly journals Biogeographical patterns in soil bacterial communities across the Arctic region

2019 ◽  
Author(s):  
Lucie A Malard ◽  
Muhammad Zohaib Anwar ◽  
Carsten S Jacobsen ◽  
David A Pearce
Keyword(s):  
Bacterial Communities ◽  
Variation Partitioning ◽  
Arctic Region ◽  
The Arctic ◽  
Alkaline Soils ◽  
Core Microbiome ◽  
Soil Bacterial Communities ◽  
Arctic Soil ◽  
Soil Bacterial ◽  
The Impact

AbstractThe considerable microbial diversity of soils, their variety and key role in biogeochemical cycling has led to growing interest in their global distribution and the impact that environmental change might have at the regional level. In the broadest study of Arctic soil bacterial communities to date, we used high-throughput DNA sequencing to investigate the bacterial diversity from 200 independent Arctic soil samples from 43 sites. We quantified the impact of spatial and environmental factors on bacterial community structure using variation partitioning analysis, illustrating a non-random distribution across the region. pH was confirmed as the key environmental driver structuring Arctic soil bacterial communities, while total organic carbon, moisture and conductivity were shown to have little effect. Specialist taxa were more abundant in acidic and alkaline soils while generalist taxa were more abundant in acidoneutral soils. Of 48,147 bacterial taxa, a core microbiome composed of only 13 taxa that were ubiquitously distributed and present within 95% of samples was identified, illustrating the high potential for endemism in the region. Overall, our results demonstrate the importance of spatial and edaphic factors on the structure of Arctic soil bacterial communities.

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