coastal habitats chapter 12 oregon coast field trip
TRANSCRIPT
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Coastal HabitatsChapter 12
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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Oregon Coast Field Trip - Sat., May 30th
dusk.geo.orst.edu/oceans/field.html 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
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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
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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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Oregon Rocky Intertidal Zone
Oregon State Parks Guide
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Oregon Rocky Intertidal
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Spray Zone:periwinkle snails boundary between spray &
intertidalrock louse & sea roaches scavenge organic debris
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High Tide Zone: filter-feed seawater / larvae are planktonic limpets, buckshot or acorn barnacles
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Oregon Limpet
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Chiton Tonicellamollusc 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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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
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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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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)
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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 rangeScavengers feeding on dead animals,
seaweed
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Oregon Crab - Pugettia
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Oregon Rocky Intertidal Zone
Oregon State Parks Guide
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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 or acorn 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