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LearningLearning OutcomesOutcomes
• Northern Coastal ScrubScrub CommunitiesCommunities Scrub • Coastal Sage Scrub • Allelopathy Lecture 29
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NorthernNorthern CoastalCoastal ScrubScrub NorthernNorthern CoastalCoastal ScrubScrub VegetationVegetation • Coastal Bluffs • Shrub dominated • Maritime Climate vegetation • Salt affected soils • Mixed with grassy • Narrow, discontinuous meadows strip from Oregon • Shrubs 1 –5 feet border S to Santa • Nine distinct Barbara subdivisions • Some locations inland recognized by Mt Diablo Range California dept Fish and Game
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• Coyote Brush CoyoteCoyote BrushBrush ScrubScrub (Baccharis pilularis) BlueBlue BlossomBlossom ScrubScrub • Commonest member of Northern Coastal • Blue Blossom Scrub (Ceanothus • Present in most thrysiflorus) subdivisions • Common following • Pioneer species burning which colonizing disturbed triggers seed habitats and germination from grasslands seedbank • Intolerant of shade
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CoastalCoastal BluffBluff ScrubScrub CaliforniaCalifornia SagebrushSagebrush ScrubScrub
• Greater wind and salt • Coastal Sagebrush exposure (Artemesia • Shrubs of shorter californica) stature ASTERACEAE • Coastal Buckwheat • Occupies drier sites (Eriogonum latifolium), with shallower soils • Seaside Daisy than occupied by (Erigeron glauca) Coyote Brush • Seaside Wooly Sunflower • Inland locations (Eriophyllum • Intergrades with staechadifolium) Coastal Sage Scrub
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ConservationConservation ProblemsProblems CausedCaused byby OtherOther NCSNCS ShrubsShrubs ConservationConservation • Coffeeberry (Rhamnus • Northern Coastal Scrub californica) coexisted in a mosaic with Coastal Prairie • Bush Monkeyflower (Mimulus aurantiacus) • Traditional burning and grazing maintained • Yellow Bush Lupine grasslands (Lupinus arboreus) • Prevention of burning and • Salal (Gaultheria reduction of grazing has lead shallon) to invasion of prairie by scrub vegetation • Secondary Succession
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IndianIndian PaintbrushPaintbrush CoastalCoastal SageSage ScrubScrub
• Orobanachaceae • Southern (Scrophulariaceae) Counterpart of • Castillejaspecies Northern Coastal • Hemiparasites Scrub • Specialized roots • Southern Coastal penetrate roots of Range Santa shrubs Barbara to Baja California
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SoftSoft ChaparralChaparral CoastalCoastal SageSage ScrubScrub FloraFlora
• Along with Northern • Black Sage (Salvia Coastal Scrub mellifera) • Shrubs have • Purple Sage (S. leucophylla) • soft foliage • Wild Buckwheat • Flexible twigs (Eriogonum • Lack spines/ thorns fasciculatum) found in true • Coyote Brush (Baccharis chaparral pilularis) • E.g. Scrub Oak
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Alellopathy Alellopathy AllelopathyAllelopathy
• Production and • Chemical warfare release of inhibitory among plants chemicals by one • Interspecific species competition • Inhibits germination • Sage (Salvia) and/or growth in • Chamise (Adenostoma another species fasciculatum) • California Walnut • Black Walnut Juglans nigra • Bracken
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