scholarly journals The effects of exotic weed Flaveria bidentis with different invasion stages on soil bacterial community structures

2015 ◽  
Vol 14 (35) ◽  
pp. 2636-2643 ◽  
Author(s):  
Huangfu Chaohe ◽  
Li Huiyan ◽  
Chen Xinwei ◽  
Liu Hongmei ◽  
Yang Dianlin
Keyword(s):  
Bacterial Community ◽  
Soil Bacterial Community ◽  
Community Structures ◽  
Soil Bacterial ◽  
Flaveria Bidentis

Soil bacterial community structures across biomes in artificial ecosystems

2020 ◽  
Vol 158 ◽  
pp. 106067
Author(s):  
Yerang Yang ◽  
Seung-Hoon Lee ◽  
Inyoung Jang ◽  
Hojeong Kang
Keyword(s):  
Bacterial Community ◽  
Soil Bacterial Community ◽  
Community Structures ◽  
Artificial Ecosystems ◽  
Soil Bacterial

scholarly journals Conservation tillage regulates soil bacterial community assemblies, network structures and ecological functions in black soils

2021 ◽  
Author(s):  
Zhuxiu Liu ◽  
Haidong Gu ◽  
Aizhen Liang ◽  
Lujun Li ◽  
Qin Yao ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Soil Carbon ◽  
High Throughput Sequencing ◽  
Conservation Tillage ◽  
Conventional Tillage ◽  
Soil Bacterial Community ◽  
Community Structures ◽  
Tillage Practices ◽  
Degrading Bacteria ◽  
Soil Bacterial

Abstract Aims Conventional tillage is a serious threat to the stability of soil ecosystems. Understanding the response mechanisms of soil microbial community assemblies to anthropogenic activities is a major topic of ecological research. Methods Here, we investigated the bacterial community structures and assemblies in bulk and rhizosphere soils of soybeans grown with conventional tillage (moldboard plow, MP) and with conservation tillage that involved no-tillage (NT) or ridge tillage (RT) using high-throughput sequencing methods. Results We found that soil bacterial community compositions, structures and assembly processes were primarily altered by tillage practices. Briefly, in comparison to MP, NT and RT increased the relative abundances of the nitrogen-fixing bacteria Mesorhizobium sp., Bradyrhizobium sp. and Burkholderia sp., but decreased the abundance of soil carbon-degrading bacteria, especially Blastococcus sp., Streptomyces sp. and Sphingomonas sp. In addition, in comparison to MP, NT and RT resulted in more stable bacterial networks and more lower the relative contribution of homogenizing dispersal. Soil pH was the primary soil factor regulating both the bacterial community structures and assembly processes under the three tillage practices. Conclusions The altered functional bacteria under conservation tillage was mostly affiliated with biomarkers and keystone taxa, inferring that conservation tillage might contribute to biological nitrogen fixation and soil carbon sequestration.

scholarly journals Community Structure Analyses Are More Sensitive to Differences in Soil Bacterial Communities than Anonymous Diversity Indices

2006 ◽  
Vol 72 (12) ◽  
pp. 7804-7812 ◽  
Author(s):  
Martin Hartmann ◽  
Franco Widmer
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Microbial Communities ◽  
Soil Microbial Communities ◽  
Rflp Analysis ◽  
Diversity Indices ◽  
Soil Bacterial Community ◽  
Community Structures ◽  
Soil Microbial ◽  
Soil Bacterial

ABSTRACT Changes in the diversity and structure of soil microbial communities may offer a key to understanding the impact of environmental factors on soil quality in agriculturally managed systems. Twenty-five years of biodynamic, bio-organic, or conventional management in the DOK long-term experiment in Switzerland significantly altered soil bacterial community structures, as assessed by terminal restriction fragment length polymorphism (T-RFLP) analysis. To evaluate these results, the relation between bacterial diversity and bacterial community structures and their discrimination potential were investigated by sequence and T-RFLP analyses of 1,904 bacterial 16S rRNA gene clones derived from the DOK soils. Standard anonymous diversity indices such as Shannon, Chao1, and ACE or rarefaction analysis did not allow detection of management-dependent influences on the soil bacterial community. Bacterial community structures determined by sequence and T-RFLP analyses of the three gene libraries substantiated changes previously observed by soil bacterial community level T-RFLP profiling. This supported the value of high-throughput monitoring tools such as T-RFLP analysis for assessment of differences in soil microbial communities. The gene library approach also allowed identification of potential management-specific indicator taxa, which were derived from nine different bacterial phyla. These results clearly demonstrate the advantages of community structure analyses over those based on anonymous diversity indices when analyzing complex soil microbial communities.

scholarly journals Effects of novel bioorganic fertilizer application on soil enzymes and bacterial community in multi-site rice paddies in China

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zuren Li ◽  
Jincai Han ◽  
Haodong Bai ◽  
Di Peng ◽  
Lifeng Wang ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Field Experiments ◽  
Chemical Properties ◽  
Soil Bacterial Community ◽  
General Function ◽  
Rice Paddies ◽  
Phylogenetic Groups ◽  
Total N ◽  
Bioorganic Fertilizer ◽  
Soil Bacterial

AbstractApplication of a novel bioorganic fertilizer (BIO) has been effectively used to inhibit weeds in rice paddies. To identify changes in soil bacterial community and enzymes in response to BIO treatments, field experiments were carried out in five major rice-growing areas in China. The dominant phylogenetic groups recorded included Proteobacteria, Actinobacteria, Bacteroidetes, Firmicutes and Acidobacteria. Anaeromyxobacter, Bacteroides, Bifidobacterium, Escherichia- Shigella, Geobacter and Haliangium were significantly different between BIO-treatment and untreated control and aided in general function (R), amino acid transport, metabolism (E) and transcription (K) clusters. The soil chemical properties and enzyme activities were less affected by BIO at these study sites. RDA analysis showed that soil bacterial community had a significant positive correlations among northern latitude, eastern longitude, exchangeable K, total K, total P, soil pH, and total N, except for organic matter, hydrolytic N and extractable P. Overall, our work showed that application of BIO does not alter the main community structure and functional diversity of soil bacteria in rice paddies and should be encouraged for use as a sustainable weed management strategy.

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