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Lecture 29. Scrub Vegetation Types

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Lecture 29. Scrub Vegetation Types Slide 1 Slide 2 LearningLearning OutcomesOutcomes • Northern Coastal ScrubScrub CommunitiesCommunities Scrub • Coastal Sage Scrub • Allelopathy Lecture 29 ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ Slide 3 Slide 4 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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________________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ Slide 5 Slide 6 • Coyote Brush CoyoteCoyote Brush Brush 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 ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ Slide 7 Slide 8 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 ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ Slide 9 Slide 10 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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