Ecology of a Rocky Shore Community

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Presentation transcript:

Ecology of a Rocky Shore Community

Zones of Life along a Rocky Shore Why are some animals and plants located in special zones and not all over?

Adaptations for life on a high energy rocky shoreline High energy waves Low tide exposure

Animals on a typical New England rocky shore

Asian Shore Crab Periwinkle snails Blue Mussels Purple Sea Urchin Rock Barnacles Common Sea Star

Algae on a typical New England rocky shore Fucus Knotted Wrack Ulva Chondrus Kelp

Adaptations to life on a rocky shore line Adapting to Wave Shock Barnacles Cements shell to rock Snails Use a suction cup like foot

Adaptations to Wave Shock Sea Stars and Urchins Tube feet with suction cup ends

Adaptations to Wave Shock Blue Mussels Byssel Threads ( strong cables)

Adaptations to Wave Shock Crabs and Lobsters Wedge into rock spaces Hide under rocks

Adaptations to Wave Shock Sea Weeds (macroalgae) Hold fasts attach to rocks

Rocky shore animal feeding adaptations Barnacles Filter food with feathery legs (filter feeder) Snails Scrape food with a radula - tongue with teeth (grazers and carnivores) Sea stars Use tube feet and stomach

Reproduction adaptations

Barnacles are hermaphrodites Each barnacle has both male and female reproductive organs Marine snails mate and deposit egg cases Sea stars and Urchins broad cast eggs and sperm into the water Marine Arthropods like crabs and lobsters mate. Female attracts male using pheromones. After the female molts and mates with the male, eggs will later be deposited on underside of her abdomen and carried until they hatch.

Lobster with eggs Green crab with eggs