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Wildlife, Animals, and Plants |
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FIRE CASE STUDY
CASE NAME:Arizona chaparral burn
REFERENCE:Pase, C. P.; Lindenmuth, A. W. 1971 [93]
FIRE CASE STUDY AUTHORSHIP:Zouhar, Kris. 2001.
SEASON/SEVERITY CLASSIFICATION:fall/variable
STUDY LOCATION:The study was located in the Sierra Ancha Experimental Forest in central Arizona, near the community of Globe.
PREFIRE VEGETATIVE COMMUNITY:Prefire vegetation was dominated by shrub live oak (Quercus turbinella) and true mountain -mahogany (Cercocarpus montanus). Other important species included: Wright silktassel (Garrya wrightii), pointleaf manzanita (Arctostaphylos pungens), Pringle manzanita (A. pringlei), desert ceanothus (Ceanothus greggii), banana yucca (Yucca baccata), narrowleaf yerba santa (Eriodictyon angustifolium), and Wright buckwheat (Eriogonum wrightii). Many plants were decadent, and some dead before the site was burned.
TARGET SPECIES PHENOLOGICAL STATE:Not reported
SITE DESCRIPTION:Elevation: 5,300 feet (1615 m) Annual precipitation: 25.0 inches (640 mm), 30% received June through September Soils: coarse, poorly developed Parent material: weathered diabase Average slope length: 120 to 190 feet (37-58 m), few > 200 feet (61 m) Slope steepness: moderate, averaging 30%
FIRE DESCRIPTION:Burns were conducted in the fall (late September/early October) one time in each of four consecutive years [93]. Average weather and fuel conditions during burns were [67,93]:
FIRE EFFECTS ON TARGET SPECIES:Canopy cover of desert ceanothus was initially greatly reduced after the fires. Comparative cover values (% crown cover) by year are as follows [93]:
Numerous desert ceanothus seedlings emerged following fire, with 79% emerging the 1st postfire year. Seedling emergence was as follows:
FIRE MANAGEMENT IMPLICATIONS:Plants are killed by fire. Heat stimulates germination of large numbers of stored seed. Prescribed fire can enhance the browse quality of decadent ceanothus stands, as numerous seedlings emerge after fire.
Related categories for SPECIES: Ceanothus greggii | Desert Ceanothus |
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