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Coastal Habitats Chapter 12 Oregon Coast Field Trip. Animals of the Benthos. 98% of marine species are benthic Hydrothermal vents Coral reefs Rocky shore Sandy shore Oregon info at the Oregon Coastal Atlas www.coastalatlas.net. Be here by 7:15 a.m.
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Animals of the Benthos • 98% of marine species are benthic • Hydrothermal vents • Coral reefs • Rocky shore • Sandy shore • Oregon info at the Oregon Coastal Atlas • www.coastalatlas.net
Be here by 7:15 a.m. 7:30 - Busses leave from Wilkinson lot 8:30 - HMSC Visitor Center 10:00 - Travel to Seal Rock State Park 10:30 - Seal Rock volcanic rocks and tide pools 12:00 - Lunch at Seal Rock (bring your own) 12:30ish - Return to Corvallis Back by ~2:00 Oregon Coast Field Trip - Sat., May 30thdusk.geo.orst.edu/oceans/field.html
Required Field Trip Guidedusk.geo.orst.edu/oceans/field.html • Answers to bolded questions in guide. Please TYPE your report!! • Turn assignment in to your TA • Due by 5:00 p.m., June 5th • This constitutes LAB 9
Rocky Shores • spray zone • mostly dry, covered by water only during storms • high tide zone • fairly dry, covered only by the highest high tide • middle tide zone • equally exposed & covered during all high & low tides • low tide zone • mostly wet
Oregon Rocky Intertidal Zone Oregon State Parks Guide
Spray Zone:periwinkle snails boundary between spray & intertidalrock louse & sea roachesscavenge organic debris
High Tide Zone:filter-feed seawater / larvae are planktoniclimpets, buckshot or acorn barnacles
Chiton Tonicellamollusc related to sea snails, clams, limpets
Middle Tide Zone:more variety, competition for spacegoose barnacles, mussel, sea stars
Fun Fact for the Day: Barnacle symbiosis male & female attached to each other through most of life until male reduced to size of microscopic penis
Low Tide Zone (Tide Pools):dominated more by plants than by animalsalgaes, sea urchins, sea anemones
Exploring the Tide Pools (and associated geology) • Shoes with good tread/grip • Extra socks • Rubber boots, if you have them • Take your field trip guide with you! • Print out this PPT too if you like! (change “output” to black & white for best results)
Shore Crabs roam entire intertidal rangeScavengers feeding on dead animals, seaweed
Oregon Rocky Intertidal Zone Oregon State Parks Guide
Animals of the Rocky Shores • spray zone • mostly dry, covered by water only during storms • periwinkle snail • rock louse • high tide zone • fairly dry, covered only by the highest high tide • Buckshot or acorn barnacles • limpets
Rocky Shores cont. • middle tide zone • equally exposed & covered during all high & low tides • more variety, competition for space • goose barnacle, mussel, sea star • sea anemone, hermit crabs, sea urchins (tidal pools) • low tide zone • mostly wet • surf grass, algae, seaweeds • sea urchins, sea anemones
Sandy Shores • no fixed surface to attach to • different adaptations protect animals from fluctuations in • temperature • salinity • water levels (so as not to dry out) • clams, worms, sand stars, amphipods
Feeders on Sandy Shores • Clams • suspension feeding • Worms • deposit feeding by ingestion • Amphipods • deposit feeding on surface • Sand stars • carnivorous feeding on unlucky neighbors
Important Web Sites • Field Trip Page and Guide • dusk.geo.orst.edu/oceans/field.html • dusk.geo.orst.edu/oceans/OC103FieldTrip.pdf • Oregon Coastal Atlas • www.coastalatlas.net • HMSC Summer Experiences • hmsc.oregonstate.edu/summer.html