Altered fire regimes affect landscape patterns of plant succession in the foothills and mountains of southern California

Janet Franklin, Alexandra D. Syphard, Hong S. He, David J. Mladenoff

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

In the southern California foothills and mountains, pronounced and complex topographic gradients support fire regimes that vary over short distances. We used LANDIS, a spatially explicit landscape model of disturbance and plant succession, to examine the resilience of dominant plant species, representing different disturbance response strategies, to the effect of varying fire rotation intervals (FRI). The simulated fire regimes represented natural, current and very long FRIs for the foothill shrublands less than 1,400 m (90, 30 and 150 years) and montane forest greater than 1400 m (30, 150, 500 years). The 30-year FRI allowed obligate resprouting shrubs to dominate over obligate seeders, whereas the 90-year FRI resulted in a stable spatial distribution of both of these shrub functional types. This is consistent with the literature that suggests that shifts in shrubland composition are most likely to result from human-caused increases in fire frequency at the low-elevation urban-wildland interface. An ecotone conifer, Pinus coulteri, showed dramatic shifts in distribution under different FRIs, and retreated to the portion of the landscape representing its temporal regeneration niche. Both low and high frequency fire maintained the fire tolerant dominant pine (P. jeffreyi) in the montane zone. This contradicts the literature that suggests that a high frequency ground fire regime is required for the persistence of a pine-dominated forest, but is consistent with studies showing that conifer forests in the western U.S. have experienced, and are resilient to, a broad range of natural FRIs that include low frequency, high intensity crown fires.

Original languageEnglish (US)
Pages (from-to)885-898
Number of pages14
JournalEcosystems
Volume8
Issue number8
DOIs
StatePublished - Dec 2005
Externally publishedYes

Fingerprint

ecological succession
fire regime
Fires
mountains
mountain
shrublands
coniferous forests
shrubs
Pinus
shrubland
wildland-urban interface
coniferous tree
shrub
ecotones
montane forests
disturbance
conifers
resprouting
niches
ecotone

Keywords

  • Chaparral
  • Ecotone
  • LANDIS
  • Landscape simulation model
  • Obligate seeder
  • Pine forest
  • Plant functional type

ASJC Scopus subject areas

  • Ecology

Cite this

Altered fire regimes affect landscape patterns of plant succession in the foothills and mountains of southern California. / Franklin, Janet; Syphard, Alexandra D.; He, Hong S.; Mladenoff, David J.

In: Ecosystems, Vol. 8, No. 8, 12.2005, p. 885-898.

Research output: Contribution to journalArticle

Franklin, Janet ; Syphard, Alexandra D. ; He, Hong S. ; Mladenoff, David J. / Altered fire regimes affect landscape patterns of plant succession in the foothills and mountains of southern California. In: Ecosystems. 2005 ; Vol. 8, No. 8. pp. 885-898.
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