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Coastal Habitats Oregon Coast Field Trip
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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
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dusk.geo.orst.edu/oceans/field.html Oregon Coast Field Trip - Sat., May 21 st 2011 dusk.geo.orst.edu/oceans/field.html Be here by 7:15 a.m. 7:30 - Busses leave from Wilkinson lot 10:00 - Seal Rock volcanic rocks and tide pools 11:30 - Lunch at Seal Rock 11:30 - Lunch at Seal Rock (bring your own; eat lunch in busses if weather is bad ) 12 noon - Travel to HMSC 12:30 - HMSC Visitor Center 2:00 ish - Return to Corvallis Back by ~4:30 p.m.
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Exploring the Tide Pools (and associated geology) Shoes with good tread/grip Extra socks Rubber boots, if you have them Pillow/stuffed animal Take your field trip guide with you! Be prepared with questions!!!
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Required Field Trip Guide dusk.geo.orst.edu/oceans/field.html Answers to bolded questions in guide –Turn assignment in to your TA –Due by 5:00 p.m., June 3rd –This constitutes LAB 9
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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
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The Rocky Shore
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Oregon Rocky Shore
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Spray Zone: periwinkle snails boundary between spray & intertidal rock louse & sea roaches scavenge organic debris
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High Tide Zone: filter-feed seawater / larvae are planktonic limpets, buckshot barnacles
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Oregon Limpet
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Chiton Tonicella mollusc related to sea snails, clams, limpets
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Middle Tide Zone: more variety, competition for space goose barnacles, mussel, sea stars
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Oregon Barnacles on Mussel
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Oregon Sea Star Zonation
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Pisaster Sea Stars
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Henricia Sea Star
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Low Tide Zone (Tide Pools): dominated more by plants than by animals algaes, sea urchins, sea anemones
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Oregon Algaes - Fachea
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Oregon Algaes - Hallosaccion
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Oregon Algaes - Mazzaella
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Oregon Algaes - Postelsia
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Oregon Sea Urchins
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Oregon Anemone - Anthopleura
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Oregon Anemone - Corynactis
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Shore Crabs roam entire intertidal range Scavengers feeding on dead animals, seaweed
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Oregon Crab - Pugettia
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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 barnacles –limpets
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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
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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
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Clams
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Worms, Amphipods, Sand Stars
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Feeders on Sandy Shores Clams –suspension feeding Worms –deposit feeding by ingestion Amphipods –deposit feeding on surface Sand stars –carnivorous feeding on unlucky neighbors
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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
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Maybe we’ll see a little guy like this in the woods near the parking lot! One of the bus drivers took this photo there in 2006!
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dusk.geo.orst.edu/oceans/field.html Oregon Coast Field Trip - Sat., May 21 st 2011 dusk.geo.orst.edu/oceans/field.html Be here by 7:15 a.m. 7:30 - Busses leave from Wilkinson lot 10:00 - Seal Rock volcanic rocks and tide pools 11:30 - Lunch at Seal Rock 11:30 - Lunch at Seal Rock (bring your own; eat lunch in busses if weather is bad ) 12 noon - Travel to HMSC 12:30 - HMSC Visitor Center 2:00 ish - Return to Corvallis Back by ~4:30 p.m.
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