Soil community composition and the regulation of grazed temperate grassland

Douglas A. Frank, Catherine A Gehring, Leonard Machut, Mark Phillips

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The effect of the community composition of soil microbes on ecosystem processes has received relatively little attention. Here we examined the variation in soil microbial composition in a Yellowstone National Park grassland and the effect of that variation on the growth, in a greenhouse, of the dominant grass in the community. Plants and their rhizospheric soil were collected from paired, Poa pratensis-dominated grassland plots located inside and outside a 40-year-old exclosure. P. pratensis aboveground, belowground, and whole plant growth were greater in pots with soil communities from grazed grassland compared to fenced grassland, indicating (1) soil microbial communities differed, and (2) this difference influenced the growth of the plant that dominated both grasslands. Treating pots with fungicide (benomyl) suppressed the soil community influence, indicating that different fungal communities caused the soil microbe effect. In addition, two lines of evidence are consistent with the hypothesis that arbuscular mycorrhizal fungal (AMF) species composition affected P. pratensis: (1) a divergence in AMF spore communities in the two field soils, and (2) little evidence of pathogenic fungi. These findings emphasize the need to examine the role that the composition of the soil microbial community plays in controlling terrestrial ecosystems.

Original languageEnglish (US)
Pages (from-to)603-609
Number of pages7
JournalOecologia
Volume137
Issue number4
DOIs
StatePublished - Dec 2003

Fingerprint

community composition
grasslands
grassland
Poa pratensis
soil
soil microorganisms
microbial communities
plant growth
microbial community
benomyl
fungal spores
fungal communities
regulation
fungicides
national parks
fungicide
terrestrial ecosystem
grasses
spore
greenhouses

Keywords

  • Grassland
  • Herbivory
  • Mycorrhizae
  • Soil microbial community
  • Yellowstone National Park

ASJC Scopus subject areas

  • Ecology

Cite this

Soil community composition and the regulation of grazed temperate grassland. / Frank, Douglas A.; Gehring, Catherine A; Machut, Leonard; Phillips, Mark.

In: Oecologia, Vol. 137, No. 4, 12.2003, p. 603-609.

Research output: Contribution to journalArticle

Frank, Douglas A. ; Gehring, Catherine A ; Machut, Leonard ; Phillips, Mark. / Soil community composition and the regulation of grazed temperate grassland. In: Oecologia. 2003 ; Vol. 137, No. 4. pp. 603-609.
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