Soil heterogeneity and plant competition in an annual grassland

Heather L. Reynolds, Bruce A Hungate, F. S. Chapin, Carla M. D'Antonio

Research output: Contribution to journalArticle

101 Citations (Scopus)

Abstract

Variation in competitive ability due to variation in soil characteristics is one possible mechanism allowing the local coexistence of plant species. We measured soil water, depth, and nitrogen pools and fluxes in distinct patches of three serpentine grassland species to determine whether soil heterogeneity existed and was correlated with plant species abundance. Through experimental manipulation of species' abundances, we also examined the relative importance of inherent site characteristics vs. plant species' effects in generating heterogeneity in the measured soil characteristics; and measured species' competitive abilities in different patch types. The three common grassland annuals, Calycadenia multiglandulosum, Plantago erecta, and Lasthenia californica, were segregated with respect to the measured soil characteristics. Differences in soil water, soil depth, soil microbial nitrogen, and soil carbon to nitrogen ratio were due to inherent site characteristics, while differences in nitrate availability were strongly affected by the identity of the species currently growing in a soil patch. Furthermore, all species performed significantly better against one other species in the patch type where they are normally most abundant. These results demonstrate that species diversity within this grassland contributes to soil heterogeneity and suggest that soil heterogeneity could contribute to the coexistence of these species.

Original languageEnglish (US)
Pages (from-to)2076-2090
Number of pages15
JournalEcology
Volume78
Issue number7
StatePublished - 1997
Externally publishedYes

Fingerprint

annual grasslands
plant competition
soil heterogeneity
grassland
soil
nitrogen
grasslands
soil water
competitive ability
Plantago
coexistence
soil depth
nitrates
species diversity
soil carbon
carbon
water depth
nitrate

Keywords

  • California grassland
  • Calycadenia multiglandulosum
  • Lasthenia californica
  • Plant coexistence and competition
  • Plantago erecta
  • Soil characteristics
  • Soil heterogeneity
  • Species diversity

ASJC Scopus subject areas

  • Ecology

Cite this

Reynolds, H. L., Hungate, B. A., Chapin, F. S., & D'Antonio, C. M. (1997). Soil heterogeneity and plant competition in an annual grassland. Ecology, 78(7), 2076-2090.

Soil heterogeneity and plant competition in an annual grassland. / Reynolds, Heather L.; Hungate, Bruce A; Chapin, F. S.; D'Antonio, Carla M.

In: Ecology, Vol. 78, No. 7, 1997, p. 2076-2090.

Research output: Contribution to journalArticle

Reynolds, HL, Hungate, BA, Chapin, FS & D'Antonio, CM 1997, 'Soil heterogeneity and plant competition in an annual grassland', Ecology, vol. 78, no. 7, pp. 2076-2090.
Reynolds HL, Hungate BA, Chapin FS, D'Antonio CM. Soil heterogeneity and plant competition in an annual grassland. Ecology. 1997;78(7):2076-2090.
Reynolds, Heather L. ; Hungate, Bruce A ; Chapin, F. S. ; D'Antonio, Carla M. / Soil heterogeneity and plant competition in an annual grassland. In: Ecology. 1997 ; Vol. 78, No. 7. pp. 2076-2090.
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