Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.

A three year field study (2007-2009) of the diversity and numbers of the total and metabolically active free-living diazotophic bacteria and total bacterial communities in organic and conventionally managed agricultural soil was conducted using the Nafferton Factorial Systems Comparison (NFSC) study...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Caroline H Orr, Carlo Leifert, Stephen P Cummings, Julia M Cooper
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b1c0479e0a34485b8505944b1eb7b136
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b1c0479e0a34485b8505944b1eb7b136
record_format	dspace
spelling	oai:doaj.org-article:b1c0479e0a34485b8505944b1eb7b1362021-11-18T08:03:17ZImpacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.1932-620310.1371/journal.pone.0052891https://doaj.org/article/b1c0479e0a34485b8505944b1eb7b1362012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23285218/?tool=EBIhttps://doaj.org/toc/1932-6203A three year field study (2007-2009) of the diversity and numbers of the total and metabolically active free-living diazotophic bacteria and total bacterial communities in organic and conventionally managed agricultural soil was conducted using the Nafferton Factorial Systems Comparison (NFSC) study, in northeast England. Fertility management appeared to have little impact on both diazotrophic and total bacterial communities. However, copy numbers of the nifH gene did appear to be negatively impacted by conventional crop protection measures across all years suggesting diazotrophs may be particularly sensitive to pesticides. Impacts of crop management were greatly overshadowed by the influence of temporal effects with diazotrophic communities changing on a year by year basis and from season to season. Quantitative analyses using qPCR of each community indicated that metabolically active diazotrophs were highest in year 1 but the population significantly declined in year 2 before recovering somewhat in the final year. The total bacterial population in contrast increased significantly each year. It appeared that the dominant drivers of qualitative and quantitative changes in both communities were annual and seasonal effects. Moreover, regression analyses showed activity of both communities was significantly affected by soil temperature and climatic conditions.Caroline H OrrCarlo LeifertStephen P CummingsJulia M CooperPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 12, p e52891 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Caroline H Orr Carlo Leifert Stephen P Cummings Julia M Cooper Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
description	A three year field study (2007-2009) of the diversity and numbers of the total and metabolically active free-living diazotophic bacteria and total bacterial communities in organic and conventionally managed agricultural soil was conducted using the Nafferton Factorial Systems Comparison (NFSC) study, in northeast England. Fertility management appeared to have little impact on both diazotrophic and total bacterial communities. However, copy numbers of the nifH gene did appear to be negatively impacted by conventional crop protection measures across all years suggesting diazotrophs may be particularly sensitive to pesticides. Impacts of crop management were greatly overshadowed by the influence of temporal effects with diazotrophic communities changing on a year by year basis and from season to season. Quantitative analyses using qPCR of each community indicated that metabolically active diazotrophs were highest in year 1 but the population significantly declined in year 2 before recovering somewhat in the final year. The total bacterial population in contrast increased significantly each year. It appeared that the dominant drivers of qualitative and quantitative changes in both communities were annual and seasonal effects. Moreover, regression analyses showed activity of both communities was significantly affected by soil temperature and climatic conditions.
format	article
author	Caroline H Orr Carlo Leifert Stephen P Cummings Julia M Cooper
author_facet	Caroline H Orr Carlo Leifert Stephen P Cummings Julia M Cooper
author_sort	Caroline H Orr
title	Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
title_short	Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
title_full	Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
title_fullStr	Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
title_full_unstemmed	Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
title_sort	impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/b1c0479e0a34485b8505944b1eb7b136
work_keys_str_mv	AT carolinehorr impactsoforganicandconventionalcropmanagementondiversityandactivityoffreelivingnitrogenfixingbacteriaandtotalbacteriaaresubsidiarytotemporaleffects AT carloleifert impactsoforganicandconventionalcropmanagementondiversityandactivityoffreelivingnitrogenfixingbacteriaandtotalbacteriaaresubsidiarytotemporaleffects AT stephenpcummings impactsoforganicandconventionalcropmanagementondiversityandactivityoffreelivingnitrogenfixingbacteriaandtotalbacteriaaresubsidiarytotemporaleffects AT juliamcooper impactsoforganicandconventionalcropmanagementondiversityandactivityoffreelivingnitrogenfixingbacteriaandtotalbacteriaaresubsidiarytotemporaleffects
_version_	1718422625467760640

Impacts of organic and conventional crop management on diversity and activity of free-living nitrogen fixing bacteria and total bacteria are subsidiary to temporal effects.

Ejemplares similares