Effects of metam sodium fumigation on soil microbial activity and community structure

Jennifer Macalady, M. E. Fuller, K. M. Scow

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Metam sodium (MS) is a widely used soil fumigant with broad biocidal activity. The impact of MS on soil microbial community structure and function is largely unknown. We investigated the effects of fumigation with field- relevant doses of MS in soil microcosms using traditional heterotrophic activity measures (C and N mineralization), a substrate-utilization assay, and fatty acid analysis. Our results suggest that fumigation with MS results in persistent changes (at least 18 wk) in heterotrophic activity and fatty acid composition of the microbial biomass. Lack of recovery of heterotrophic activity and changes in fatty acid composition after fumigation suggest that MS has the potential to alter important microbially mediated functions such as nutrient cycling and pollutant degradation. Preliminary fatty acid data suggest that actinomycetes and other gram-positive organisms may recover preferentially after fumigation with MS. Although community fatty acid analysis shows promise as a screening tool in soil microbial toxicity studies, more detailed information can be obtained from analysis of phospholipid fatty acid (PLFA) and other specific lipid fractions.

Original languageEnglish (US)
Pages (from-to)54-63
Number of pages10
JournalJournal of Environmental Quality
Volume27
Issue number1
DOIs
StatePublished - Jan 1 1998

Fingerprint

Fumigation
fumigation
Fatty acids
microbial activity
microbial community
community structure
fatty acid
Sodium
sodium
Soils
soil
fumigant
Phospholipids
nutrient cycling
phospholipid
Chemical analysis
microcosm
Lipids
Nutrients
Toxicity

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law

Cite this

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Effects of metam sodium fumigation on soil microbial activity and community structure. / Macalady, Jennifer; Fuller, M. E.; Scow, K. M.

In: Journal of Environmental Quality, Vol. 27, No. 1, 01.01.1998, p. 54-63.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of metam sodium fumigation on soil microbial activity and community structure

AU - Macalady, Jennifer

AU - Fuller, M. E.

AU - Scow, K. M.

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