Animals of the Benthos
98% of marine species are benthic Hydrothermal vents Coral reefs Rocky shore Sandy shore Oregon info at the new Oregon Coastal Atlas –www.coastalatlas.net
Oregon Coast Field Trip -
Sat., June 3rd dusk.geo.orst.edu/oceans/fie
ld.html Be here by 8:30 a.m.
8:45 - Busses leave from Wilkinson lot
10:00 - HMSC Visitor Center
11:30 - Travel to Sea Rock & Lunch at Seal Rock park (bring your own)
12:30 - Seal Rock volcanic rocks and tide pools
1:30ish - Return to Corvallis
Back by ~3:00
Required Field Trip Guide
dusk.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 9th–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
Spray Zone:periwinkle snails boundary between
spray & intertidalrock louse & sea roaches scavenge organic
debris
Fun Fact for the Day: Barnacle symbiosismale & 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 animals
algaes, 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!
Be prepared with questions!!!
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
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/learn
Oregon Tidepool Page– hmsc.oregonstate.edu/projects/rocky/tidepool.html
HMSC Summer Experiences– hmsc.oregonstate.edu/classes/2006summer/
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