Temperate Shrub land (Chaparral) Biome Geographic distribution Western coasts of North and South America, areas around the Mediterranean Sea, South Africa, and Australia Between 30-50o N Between 30-40o S Basic Characteristics • Semiarid climate, mix of shrub communities and open woodlands. • Open woodlands: Large areas of grasses and wildflowers such as poppies interspersed with oak trees. • Communities dominated by shrubs: also known as chaparral. • Growth of dense, low plants that contain flammable oils makes fires a constant threat. Basic Characteristics • Plant community in which shrubs are dominant. • Occurs usually in regions having from 10 to 20 in. (25-50 cm) of rainfall annually and with a Mediterranean-type climate. • Rate of evaporation is high, chaparral may be found where the rainfall is well above 20 in. • Generally chaparral country has most of its rainfall in the winter. • The vegetation includes both evergreen and deciduous forms, the dominant species varying in different areas. What Chaparral is Not • It is NOT a plant, a herb sold in health food stores (they're actually selling ground up leaves from the creosote bush...a desert plant), or a 1960's television show. • It does NOT need fire to remain a healthy plant community. • It does NOT exist in Texas. • It has NOT become overgrown due to fire suppression. What Chaparral is: • California's most extensive, native plant community. Abiotic factors • Hot, dry summers • Cool, moist winters • Thin, nutrient-poor soils • Periodic fires Climatograph Biotic Factors Dominant Plant Types • Woody evergreen shrubs with small, leathery leaves • Fragrant, oily herbs that grow during winter and die in summer Examples • Blue Oak • Coyote Brush • Common Sagebrush • Fairy Duster • French Broom • King Protea • Lebanon Cedar • Manzanita • Mountain Mahogany • Saltmarsh Bird's Beak • Olive Tree • Torrey Pine Biotics: Dominant Animals • Predators such as coyotes, foxes, bobcats, and mountain lions • Herbivores such as blacktailed deer, rabbits squirrels, and mice; • Birds such as hawks, California quails, western scrub jays, warblers and other songbirds; • Reptiles such as lizards and snakes • Arachnids such as butterflies; spiders Animals (cont.) • Aardwolf • Black-tailed Jackrabbit • Cactus Wren • Golden Jackal • Grey Fox • Isand Grey Fox • Puma • San Joachin Kit Fox • Spotted Skunk • Wild Goat Damage to the Chaparral The gradual invasion of invasive weeds into areas where chaparral has been "masticated" during three separate fuel treatment projects in the Painted Cave area, Santa Barbara, CA. Threats From a Variety of Processes • Clearing and fragmentation, insect outbreaks, diseases, and grazing. • Failure of woodland trees to regenerate intensive grazing killing off any seedlings that do appear. • Removal of old/dead trees for firewood and the destruction of seedlings by grazing combine to reduce the long term sustainability of woodland ecosystems. • Off-road vehicles. Chaparral Quiz • T/F: Chaparral is a plant, a herb sold in health food stores (they're actually selling ground up leaves from the creosote bush...a desert plant), or a 1960's television show... • T/F: Chaparral needs fire to remain a healthy plant community... • T/F: Chaparral exists in Texas... • T/F: Chaparral has NOT become overgrown due to fire suppression. Answers • Chaparral is NOT a plant, a herb sold in health food stores (they're actually selling ground up leaves from the creosote bush...a desert plant), or a 1960's television show... • Chaparral does NOT need fire to remain a healthy plant community... • Chaparral does NOT exist in Texas... • Chaparral has NOT become overgrown due to fire suppression.