Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.

Anthropogenic changes are altering the environmental conditions and the biota of ecosystems worldwide. In many temperate grasslands, such as North American tallgrass prairie, these changes include alteration in historically important disturbance regimes (e.g., frequency of fires) and enhanced availa...

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Autores principales:	Joseph D Coolon, Kenneth L Jones, Timothy C Todd, John M Blair, Michael A Herman
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a14c8b53c25c4531bd1c72f1ce751370
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spelling	oai:doaj.org-article:a14c8b53c25c4531bd1c72f1ce7513702021-11-18T07:39:23ZLong-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.1932-620310.1371/journal.pone.0067884https://doaj.org/article/a14c8b53c25c4531bd1c72f1ce7513702013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23840782/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Anthropogenic changes are altering the environmental conditions and the biota of ecosystems worldwide. In many temperate grasslands, such as North American tallgrass prairie, these changes include alteration in historically important disturbance regimes (e.g., frequency of fires) and enhanced availability of potentially limiting nutrients, particularly nitrogen. Such anthropogenically-driven changes in the environment are known to elicit substantial changes in plant and consumer communities aboveground, but much less is known about their effects on soil microbial communities. Due to the high diversity of soil microbes and methodological challenges associated with assessing microbial community composition, relatively few studies have addressed specific taxonomic changes underlying microbial community-level responses to different fire regimes or nutrient amendments in tallgrass prairie. We used deep sequencing of the V3 region of the 16S rRNA gene to explore the effects of contrasting fire regimes and nutrient enrichment on soil bacterial communities in a long-term (20 yrs) experiment in native tallgrass prairie in the eastern Central Plains. We focused on responses to nutrient amendments coupled with two extreme fire regimes (annual prescribed spring burning and complete fire exclusion). The dominant bacterial phyla identified were Proteobacteria, Verrucomicrobia, Bacteriodetes, Acidobacteria, Firmicutes, and Actinobacteria and made up 80% of all taxa quantified. Chronic nitrogen enrichment significantly impacted bacterial community diversity and community structure varied according to nitrogen treatment, but not phosphorus enrichment or fire regime. We also found significant responses of individual bacterial groups including Nitrospira and Gammaproteobacteria to long-term nitrogen enrichment. Our results show that soil nitrogen enrichment can significantly alter bacterial community diversity, structure, and individual taxa abundance, which have important implications for both managed and natural grassland ecosystems.Joseph D CoolonKenneth L JonesTimothy C ToddJohn M BlairMichael A HermanPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 6, p e67884 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Joseph D Coolon Kenneth L Jones Timothy C Todd John M Blair Michael A Herman Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
description	Anthropogenic changes are altering the environmental conditions and the biota of ecosystems worldwide. In many temperate grasslands, such as North American tallgrass prairie, these changes include alteration in historically important disturbance regimes (e.g., frequency of fires) and enhanced availability of potentially limiting nutrients, particularly nitrogen. Such anthropogenically-driven changes in the environment are known to elicit substantial changes in plant and consumer communities aboveground, but much less is known about their effects on soil microbial communities. Due to the high diversity of soil microbes and methodological challenges associated with assessing microbial community composition, relatively few studies have addressed specific taxonomic changes underlying microbial community-level responses to different fire regimes or nutrient amendments in tallgrass prairie. We used deep sequencing of the V3 region of the 16S rRNA gene to explore the effects of contrasting fire regimes and nutrient enrichment on soil bacterial communities in a long-term (20 yrs) experiment in native tallgrass prairie in the eastern Central Plains. We focused on responses to nutrient amendments coupled with two extreme fire regimes (annual prescribed spring burning and complete fire exclusion). The dominant bacterial phyla identified were Proteobacteria, Verrucomicrobia, Bacteriodetes, Acidobacteria, Firmicutes, and Actinobacteria and made up 80% of all taxa quantified. Chronic nitrogen enrichment significantly impacted bacterial community diversity and community structure varied according to nitrogen treatment, but not phosphorus enrichment or fire regime. We also found significant responses of individual bacterial groups including Nitrospira and Gammaproteobacteria to long-term nitrogen enrichment. Our results show that soil nitrogen enrichment can significantly alter bacterial community diversity, structure, and individual taxa abundance, which have important implications for both managed and natural grassland ecosystems.
format	article
author	Joseph D Coolon Kenneth L Jones Timothy C Todd John M Blair Michael A Herman
author_facet	Joseph D Coolon Kenneth L Jones Timothy C Todd John M Blair Michael A Herman
author_sort	Joseph D Coolon
title	Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
title_short	Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
title_full	Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
title_fullStr	Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
title_full_unstemmed	Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
title_sort	long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/a14c8b53c25c4531bd1c72f1ce751370
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Long-term nitrogen amendment alters the diversity and assemblage of soil bacterial communities in tallgrass prairie.

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