Ecosystem (Rocky Shore)

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Presentation transcript:

Ecosystem (Rocky Shore) pool

Rocky Shore habitat

Zonation

Upper Shore Lichen Snail algae Periwinkle

Middle Shore Limpet Barnacle Gastropod Stalked barnacle Chiton

Lower Shore Sea urchin sea cucumber Goby fish Sea Anemones Brown Algae

Physical Factors Tidal movement Wave Action Substrate

Formation of tide

Tidal movement Desiccation Difficulty in gas exchange (gill) High temperature Salinity fluctuation (river, rain, rock pool) Illumination

Rock pool Tide in Tide out salinity Temperature Time

Wave Action Wind speed and direction Slope of shore or whether sheltered Effect Buffeting action (tearing ) Washing away Sprays water to upper tide

Soft substratum as muddy and sandy shore Hard surface for attaching Substrate Soft substratum as muddy and sandy shore Hard surface for attaching Crack for shelter

Against desiccation, wave and salinity Adaptation Against desiccation, wave and salinity Retreat to sheltered areas Protective cover Internal gill Strong adhesive power (byssus threads, muscular food) Flattened body Red pigment in algae for deep water illumination

Cone shaped limpets

Up shore Green algae Low shore Brown algae

Shell, muscular food

Inter-relationship in organisms Predation Competition Commensalism Mutualism Parasitism

Food Web . 1 = Detritus, 2 = plankton, 3 = benthic algae, 4 = acorn barnacles, 5 = Mytilus edulis (mussels), 6 = Pollicieps, 7= chitons, 8 = limpets, 9 = Tegula, 10 = Littorina, 11 = Thais, 12 = Pisaster, 13 = Leptasterias. (Diagram from Begon, Harper et al 1990)

Other predator

Related web site Rocky Shore — Plants and Animals http://www.tip.net.au/~sef/amanda/rsdeszon.htm Intertidal Habitat: Rocky Shores http://darter.ocps.k12.fl.us/classroom/klenk/Rocky.htm Intertidal Organisms http://redbaron.bishops.ntc.nf.ca/wells/fieldtrp/survey.htm Intertidal Zone: Rocky — California coast http://www.branson.org/www.branson.org/depts/science/marbio/Intertidal_Intro.html

Marine biologist