Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities
Abstract
Bioenergy crops are a promising energy alternative to fossil fuels. During bioenergy feedstock production, crop inputs shape the composition of soil microbial communities, which in turn influences nutrient cycling and plant productivity. In addition to cropping inputs, site characteristics (e.g., soil texture, climate) influence bacterial and fungal communities. We explored the response of soil microorganisms to bioenergy cropping system (switchgrass vs. maize) and site (sandy loam vs. silty loam) within two long-term experimental research stations. The live and total microbial community membership was investigated using 16S and ITS amplicon sequencing of soil RNA and DNA. For both nucleic acid types, we expected fungi and prokaryotes to be differentially impacted by crop and site due their dissimilar life strategies. We also expected live communities to be more strongly affected by site and crop than the total communities due to a sensitivity to recent stimuli. Instead, we found that prokaryotic and fungal community composition was primarily driven by site with a secondary crop effect, highlighting the importance of soil texture and fertility in shaping both communities. Specific highly abundant prokaryotic and fungal taxa within live communities were indicative of site and cropping systems, providing insight into treatment-specific, agriculturally relevant microbial taxa thatmore »
- Authors:
-
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Great Lakes Bioenergy Research Center (GLBRC), Madison, WI (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF)
- OSTI Identifier:
- 1827694
- Alternate Identifier(s):
- OSTI ID: 1831136
- Report Number(s):
- PNNL-SA-156730
Journal ID: ISSN 1664-302X; FWP 68292; DEB 1832042
- Grant/Contract Number:
- SC0018409; AC05-76RL01830; DEB 1832042
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Frontiers in Microbiology
- Additional Journal Information:
- Journal Volume: 12; Journal ID: ISSN 1664-302X
- Publisher:
- Frontiers Research Foundation
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; Switchgrass; maize; soil texture; community rRNA; microbial diversity; indicator species; bioenergy; necromass
Citation Formats
Leichty, Sarah I., Kasanke, Christopher P., Bell, Sheryl L., and Hofmockel, Kirsten S. Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities. United States: N. p., 2021.
Web. doi:10.3389/fmicb.2021.725756.
Leichty, Sarah I., Kasanke, Christopher P., Bell, Sheryl L., & Hofmockel, Kirsten S. Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities. United States. https://doi.org/10.3389/fmicb.2021.725756
Leichty, Sarah I., Kasanke, Christopher P., Bell, Sheryl L., and Hofmockel, Kirsten S. Thu .
"Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities". United States. https://doi.org/10.3389/fmicb.2021.725756. https://www.osti.gov/servlets/purl/1827694.
@article{osti_1827694,
title = {Site and Bioenergy Cropping System Similarly Affect Distinct Live and Total Soil Microbial Communities},
author = {Leichty, Sarah I. and Kasanke, Christopher P. and Bell, Sheryl L. and Hofmockel, Kirsten S.},
abstractNote = {Bioenergy crops are a promising energy alternative to fossil fuels. During bioenergy feedstock production, crop inputs shape the composition of soil microbial communities, which in turn influences nutrient cycling and plant productivity. In addition to cropping inputs, site characteristics (e.g., soil texture, climate) influence bacterial and fungal communities. We explored the response of soil microorganisms to bioenergy cropping system (switchgrass vs. maize) and site (sandy loam vs. silty loam) within two long-term experimental research stations. The live and total microbial community membership was investigated using 16S and ITS amplicon sequencing of soil RNA and DNA. For both nucleic acid types, we expected fungi and prokaryotes to be differentially impacted by crop and site due their dissimilar life strategies. We also expected live communities to be more strongly affected by site and crop than the total communities due to a sensitivity to recent stimuli. Instead, we found that prokaryotic and fungal community composition was primarily driven by site with a secondary crop effect, highlighting the importance of soil texture and fertility in shaping both communities. Specific highly abundant prokaryotic and fungal taxa within live communities were indicative of site and cropping systems, providing insight into treatment-specific, agriculturally relevant microbial taxa that were obscured within total community profiles. Within live prokaryote communities, predatory Myxobacteria spp. were largely indicative of silty and switchgrass communities. Within live fungal communities, Glomeromycota spp. were solely indicative of switchgrass soils, while a few very abundant Mortierellomycota spp. were indicative of silty soils. Site and cropping system had distinct effects on the live and total communities reflecting selection forces of plant inputs and environmental conditions over time. Comparisons between RNA and DNA communities uncovered live members obscured within the total community as well as members of the relic DNA pool. The associations between live communities and relic DNA are a product of the intimate relationship between the ephemeral responses of the live community and the accumulation of DNA within necromass that contributes to soil organic matter, and in turn shapes soil microbial dynamics.},
doi = {10.3389/fmicb.2021.725756},
journal = {Frontiers in Microbiology},
number = ,
volume = 12,
place = {United States},
year = {Thu Oct 14 00:00:00 EDT 2021},
month = {Thu Oct 14 00:00:00 EDT 2021}
}
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