Complex effects of prescribed fire on restoring the soil water content in a high-elevation Riparian Meadow, Arizona

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

One of the largest and rarest Bebb willow (Salix bebbiana) communities in the United States occurs at Hart Prairie, Arizona. Low recruitment of the willow over the past several decades has been linked to inadequate soil water content for seed germination and seedling establishment. We tested a hypothesis that a prescribed burn would reduce biomass of and evapotranspiration by herbaceous plants, thereby increasing soil water content. Three treatments (unburned control, early-growing season burned, late-growing season burned) were applied in year 2001 to replicated plots in fern- and grass-dominated herbaceous communities. Soil water content (0-30 cm) was measured weekly in plots during the 2001, 2002, and 2003 growing seasons. Both early- and late-season burning reduced herbaceous biomass in the fern-dominated community in 2002 and 2003 and reduced biomass in the grass-dominated community in 2002 but not in 2003. Soil water content increased for approximately four weeks in 2001 following the early-season burn, but the early-season and late-season burns reduced soil water content in both communities over much of the 2002 and 2003 growing seasons. Thus, early-season burning may benefit willow seed germination by increasing soil water content immediately following burning but be detrimental to germination in the second and third growing seasons after burning because of drier soil. Large temporal variation in the effect of prescribed burning on soil water content will complicate the use of fire as a restoration tool to manage soil water available for threatened plants such as Bebb willow and for recharge of groundwater.

Original languageEnglish (US)
Pages (from-to)242-250
Number of pages9
JournalRestoration Ecology
Volume14
Issue number2
DOIs
StatePublished - Jun 2006

Fingerprint

prescribed burning
meadow
meadows
soil water content
soil water
water content
growing season
burning season
germination
ferns and fern allies
fern
biomass
seed germination
grasses
grass
groundwater recharge
seed
herbaceous plants
Salix
effect

Keywords

  • Ecohydrology
  • Fire
  • Grassland
  • Prescribed burn
  • Riparian
  • Soil moisture
  • Soil water content

ASJC Scopus subject areas

  • Ecology

Cite this

Complex effects of prescribed fire on restoring the soil water content in a high-elevation Riparian Meadow, Arizona. / Mullen, Regina M.; Springer, Abraham E; Kolb, Thomas E.

In: Restoration Ecology, Vol. 14, No. 2, 06.2006, p. 242-250.

Research output: Contribution to journalArticle

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