scholarly journals Soil microbes mediate the effects of environmental variability on plant invasion

2021 ◽  
Author(s):  
Xue Zhang ◽  
Mark van Kleunen ◽  
Chunling Chang ◽  
Yanjie Liu
Keyword(s):  
Nutrient Availability ◽  
Plant Invasion ◽  
Environmental Variability ◽  
Soil Analysis ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Opposite Pattern ◽  
Native Communities ◽  
Soil Microbial ◽  
High Nutrient

Many studies indicate that increases in resource variability promote plant invasion. However, it remains unknown to what extent these effects might indirectly be mediated by other organisms. To test this, we grew eight alien species in pot-mesocosms with five different native communities under eight combinations of two nutrient-availability, two nutrient-fluctuation and two soil-microbe treatments. We found that when plants grew in sterilized soil, nutrient fluctuation promoted the dominance of alien plants under low nutrient availability, whereas its effect was minimal under high nutrient availability. However, the opposite pattern was found when plants grew in living soil. Analysis of the soil microbial community suggests that this might reflect that nutrient fluctuation strongly increased the soil fungal pathogen diversity under high nutrient availability, but slightly decreased it under low nutrient availability. Our findings indicate that besides its direct influence, environmental variability could also indirectly affect plant invasion via changes in soil-microbial communities.

scholarly journals Does a carbonatite deposit influence its surrounding ecosystem?

FACETS ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 389-406
Author(s):  
James M.C. Jones ◽  
Elizabeth A. Webb ◽  
Michael D.J. Lynch ◽  
Trevor C. Charles ◽  
Pedro M. Antunes ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Soil Chemistry ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Vegetation Survey ◽  
Northern Ontario ◽  
Soil Microbial ◽  
Bacteria And Fungi ◽  
First Time

Carbonatites are unusual alkaline rocks with diverse compositions. Although previous work has characterized the effects these rocks have on soils and plants, little is known about their impacts on local ecosystems. Using a deposit within the Great Lakes–St. Lawrence forest in northern Ontario, Canada, we investigated the effect of a carbonatite on soil chemistry and on the structure of plant and soil microbial communities. This was done using a vegetation survey conducted above and around the deposit, with corresponding soil samples collected for determining soil nutrient composition and for assessing microbial community structure using 16S/ITS Illumina Mi-Seq sequencing. In some soils above the deposit a soil chemical signature of the carbonatite was found, with the most important effect being an increase in soil pH compared with the non-deposit soils. Both plants and microorganisms responded to the altered soil chemistry: the plant communities present in carbonatite-impacted soils were dominated by ruderal species, and although differences in microbial communities across the surveyed areas were not obvious, the abundances of specific bacteria and fungi were reduced in response to the carbonatite. Overall, the deposit seems to have created microenvironments of relatively basic soil in an otherwise acidic forest soil. This study demonstrates for the first time how carbonatites can alter ecosystems in situ.

scholarly journals Effects of Exogenous Microbial Agents on Soil Nutrient and Microbial Community Composition in Greenhouse-Derived Vegetable Straw Composts

2021 ◽  
Vol 13 (5) ◽  
pp. 2925
Author(s):  
Cuixia Yun ◽  
Changrong Yan ◽  
Yinghao Xue ◽  
Zhiyu Xu ◽  
Tuo Jin ◽  
...  
Keyword(s):  
Microbial Community Composition ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Chicken Manure ◽  
Vegetable Waste ◽  
Bacterial Phyla ◽  
Treatment Groups ◽  
Soil Microbial ◽  
Base Materials ◽  
Microbial Agents

Vegetable waste causes resource waste and environmental pollution, giving rise to the spread of harmful organisms and causing disease in normal vegetable cultivation. Random distribution of vegetable waste can increase the risk of non-point agricultural pollution and explore the feasibility of its resource utilization. This study was designed to evaluate the effects of different doses of exogenous microbial agents on soil microbial communities after in situ composting of cucumber straw on plots with biodegradable mulch films. The cucumber straw and chicken manure were used as the base materials, and the next generation sequencing was used to analyze changes in the microbiome following composting. The results demonstrate that the addition of exogenous microbial agents had prolonged the high-temperature duration, reduced the total organic carbon (TOC) content, and accelerated the decline in the C/N ratio, ensuring compost maturity and effectively shortening the composting time. The predominant bacterial phyla of the four treatment groups were Proteobacteria and Firmicutes; while among fungal phyla, these treatments decreased the relative abundance of Ascomycota. The treatment of 300 t/ha microbial agents significantly increased the richness and diversity of both the bacterial and fungal communities. Redundancy analysis suggested that soil total nitrogen (TN) content had a significant effect on the bacterial community, while TN content, pH, and temperature influenced the fungal community in these samples. Collectively, the treatment of 300 t/ha exogenous microbial agents improved the quality of composting and promoted microbiome diversity.

scholarly journals Role and influence of soil microbial communities on plant invasion

2017 ◽  
Vol 27 ◽  
pp. 9 ◽  
Author(s):  
Koshila Ravi Ravichandran ◽  
Muthukumar Thangavelu
Keyword(s):  
Microbial Communities ◽  
Plant Invasion ◽  
Soil Microbial Communities ◽  
Soil Microbial

scholarly journals Variations in soil nutrient dynamics and bacterial communities in long-term tea monoculture production systems

2021 ◽  
Author(s):  
Heng Gui ◽  
Lichao Fan ◽  
Donghui Wang ◽  
Peng Yan ◽  
Xin Li ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Nutrient Dynamics ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Stand Age ◽  
Soil Microbial ◽  
Soil Bacterial Communities ◽  
Tea Plantations ◽  
Soil Bacterial

AbstractLong-term monoculture agriculture systems could lead to soil degradation and yield decline. The ways in which soil microbiotas interact with one another, particularly in response to long-term tea monoculture systems are currently unclear. In this study, through the comparison of three independent tea plantations across eastern China composed of varying stand ages (from 3 years to 90 years after conversion from forest), we found that long-term tea monoculture led to significant increases in soil total organic carbon (TOC) and microbial nitrogen (MBN). Additionally, the structure, function and co-occurrence network of soil microbial communities were investigated by pyrosequencing 16S rRNA genes. The pyrosequencing analysis revealed that structures and functions of soil bacterial communities were significantly affected by different stand ages of tea plantations, but sampling sites and land-use conversion (from forest to tea plantation) still outcompeted stand age to control the diversity and structure of soil bacterial communities. Further RDA analysis revealed that the C and N availability improvement in tea plantation soils led to variation of structure and function in soil microbial communities. Moreover, co-occurrence network analysis of soil bacterial communities also demonstrated that interactions among soil bacteria taxa were strengthened with the increasing stand age of respective tea stands. Overall, this study provides a comprehensive understanding of the impact of long-term monoculture stand age on soil nutrient dynamics and bacterial communities in tea production.

scholarly journals Metagenomic Analysis Exploring Taxonomic and Functional Diversity of Soil Microbial Communities in Sugarcane Fields Applied with Organic Fertilizer

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Ruoyu Li ◽  
Ziqin Pang ◽  
Yongmei Zhou ◽  
Nyumah Fallah ◽  
Chaohua Hu ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Organic Fertilizer ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Nucleotide Metabolism ◽  
Chemical Fertilizer ◽  
Organic Chemical ◽  
Soil Nutrient Status ◽  
Soil Microbial

Organic fertilizers are critically important to soil fertility, microbial communities, and sustainable agricultural strategies. We compared the effect of two fertilizer groups (organic+chemical fertilizer: OM, chemical fertilizer: CK) on sugarcane growth, by observing the difference in microbial communities and functions, soil nutrient status, and agronomic characters of sugarcane. The results showed that the sugar content and yield of sugarcane increased significantly under organic fertilizer treatment. We believe that the increased soil nutrient status and soil microorganisms are the reasons for this phenomenon. In addition, redundancy analysis (RDA) shows that the soil nutrient condition has a major impact on the soil microbial community. In comparison with CK, the species richness of Acidobacteria, Proteobacteria, Chloroflexi, and Gemmatimonadetes as well as the functional abundance of nucleotide metabolism and energy metabolism increased significantly in the OM field. Moreover, compared with CK, genes related to the absorption and biosynthesis of sulfate were more prominent in OM. Therefore, consecutive organic fertilizer application could be an effective method in reference to sustainable production of sugarcane.

Effect of Coarse Woody Debris on Soil Microbial Functional Diversity Following a Huge Ice Storm in South China

2012 ◽  
Vol 550-553 ◽  
pp. 2649-2654
Author(s):  
Yu Duan Ou ◽  
Tian Wu ◽  
Zhi Yao Su
Keyword(s):  
Functional Diversity ◽  
Coarse Woody Debris ◽  
Woody Debris ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Positive Contribution ◽  
Ice Storm ◽  
Microbial Functional Diversity ◽  
Soil Microbial ◽  
Decay Class

Soil microbe’s response to coarse woody debris (CWD) was assessed in two contrasting stands. The volume, percent cover and weight of CWD in the damaged stand were significantly much higher than the undamaged stand. Redundancy Analysis showed that CWD and soil nutrient had a significant effect on soil microbial community (p < 0.005). Decay class of CWD had the greatest influence on soil microbial communities, and soil nutrient was next to it. With increasing decay class, CWD was favorable for soil microbial functional diversity. Alkali-hydrolyzable nitrogen, available phosphorus and available potassium showed a positive correlation with decay class and made a positive contribution on soil microbial functional diversity. Stands without ice storm impact temporarily had higher soil nutrient content than those suffered severe damage at the early stage after ice storm. Soil microbial functional diversity had no difference between both slopes. Findings reflected that there were other factors affecting the soil microbes in forest ecosystem except for the CWD decomposition and soil nutrient.

scholarly journals Soil microbial communities of three grassland ecosystems in the Bayinbuluke, China

2018 ◽  
Vol 64 (3) ◽  
pp. 209-213 ◽  
Author(s):  
Keqiang Shao ◽  
Guang Gao
Keyword(s):  
Microbial Community ◽  
Soil Microbial Community ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Amplicon Sequencing ◽  
Shannon Index ◽  
Alpine Grassland ◽  
Cold Desert ◽  
Soil Microbial Community Structure ◽  
Soil Microbial

The microbial community plays an important role in soil nutrient cycles and energy transformations in alpine grassland. In this study, we investigated the composition of the soil microbial community collected from alpine cold swamp meadow (ASM), alpine cold meadow (AM), and alpine cold desert steppe (ADS) within the Bayinbuluke alpine grassland, China, using Illumina amplicon sequencing. Of the 147 271 sequences obtained, 36 microbial phyla or groups were detected. The results showed that the ADS had lower microbial diversity than the ASM and AM, as estimated by the Shannon index. The Verrucomicrobia, Chloroflexi, Planctomycetes, Proteobacteria, and Actinobacteria were the predominant phyla in all 3 ecosystems. Particularly, Thaumarchaeota was only abundant in ASM, Bacteroidetes in AM, and Acidobacteria in ADS. Additionally, the predominant genus also differed with each ecosystem. Candidatus Nitrososphaera was predominant in ADS, the Pir4 lineage in ASM, and Sphingomonas in AM. Our results indicated that the soil microbial community structure was different for each grassland ecosystem in the Bayinbuluke.

scholarly journals Diversity of microbial communities and soil nutrients in sugarcane rhizosphere soil under water soluble fertilizer

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245626
Author(s):  
Huan Niu ◽  
Ziqin Pang ◽  
Nyumah Fallah ◽  
Yongmei Zhou ◽  
Caifang Zhang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Soil Nutrients ◽  
Soil Microbial Community ◽  
Soil Microbial Communities ◽  
Soil Nutrient ◽  
Water Soluble ◽  
Growth And Yield ◽  
Soil Microbial ◽  
Soluble Fertilizer

The dynamics of soil microbial communities are important for plant health and productivity. Soil microbial communities respond differently to fertilization. Organic water soluble fertilizer is an effective soil improver, which can effectively improve soil nutrient status and adjust soil pH value. However, little is known about the effects of water soluble fertilizers on soil microbial community, and the combined effects on soil nutrients and sugarcane productivity. Therefore, this study sought to assess the effects of water soluble fertilizer (1,050 kg/hm2 (WS1), 1,650 kg/hm2 (WS2)) and mineral fertilizer (1,500 kg/hm2 (CK)) on the soil microbial community, soil nutrients and crop yield of sugarcane. The results showed that compared with CK, the application of water soluble fertilizers (WS1 and WS2) alleviated soil acidity, increased the OM, DOC, and AK contents in the soil, and further improved agronomic parameters and sugarcane yield. Both WS1 and WS2 treatments significantly increased the species richness of microorganisms, especially the enrichment of beneficial symbiotic bacteria such as Acidobacteria and Planctomycetes, which are more conducive to the healthy growth of plants. Furthermore, we found that soil nutrient contents were associated with soil microbial enrichment. These results indicate that water soluble fertilizer affects the enrichment of microorganisms by improving the nutrient content of the soil, thereby affecting the growth and yield of sugarcane. These findings therefore suggest that the utilization of water soluble fertilizer is an effective agriculture approach to improve soil fertility.

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