Coastal Habitats

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

Oregon Coast Field Trip - Sat., May 21st 2011

dusk.geo.orst.edu/oceans/field.htmldusk.geo.orst.edu/oceans/field.html Be here by 7:15 a.m.Be here by 7:15 a.m. 7:30 - Busses 7:30 - Busses leaveleave from from

Wilkinson lotWilkinson lot 10:00 - Seal Rock 10:00 - Seal Rock

volcanic rocks and tide volcanic rocks and tide poolspools

11:30 - Lunch at Seal 11:30 - Lunch at Seal Rock Rock (bring your own; eat lunch in busses if weather is bad)

12 noon - Travel to 12 noon - Travel to HMSCHMSC

12:30 - HMSC Visitor 12:30 - HMSC Visitor CenterCenter

2:002:00ishish - Return to - Return to CorvallisCorvallis

Back by ~4:30 p.m.Back by ~4:30 p.m.

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!!!

Required Field Trip Guidedusk.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

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

The Rocky Shore

Oregon Rocky Shore

Spray Zone:periwinkle snails boundary between spray &

intertidalrock louse & sea roaches scavenge organic debris

High Tide Zone: filter-feed seawater / larvae are planktonic

limpets, buckshot barnacles

Oregon Limpet

Chiton Tonicellamollusc related to sea snails, clams, limpets

Middle Tide Zone: more variety, competition for space

goose barnacles, mussel, sea stars

Oregon Barnacles on Mussel

Oregon Sea Star Zonation

Pisaster Sea Stars

Henricia Sea Star

Low Tide Zone (Tide Pools): dominated more by plants than by animals

algaes, sea urchins, sea anemones

Oregon Algaes - Fachea

Oregon Algaes - Hallosaccion

Oregon Algaes - Mazzaella

Oregon Algaes - Postelsia

Oregon Sea Urchins

Oregon Anemone - Anthopleura

Oregon Anemone - Corynactis

Shore Crabs roam entire intertidal rangeScavengers feeding on dead animals,

seaweed

Oregon Crab - Pugettia

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

Clams

Worms, Amphipods, Sand Stars

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

Maybe we’ll see a little guy like this Maybe we’ll see a little guy like this in the woods near the parking lot! in the woods near the parking lot!

One of the bus drivers took this photo there in 2006!One of the bus drivers took this photo there in 2006!

Oregon Coast Field Trip - Sat., May 21st 2011

dusk.geo.orst.edu/oceans/field.htmldusk.geo.orst.edu/oceans/field.html Be here by 7:15 a.m.Be here by 7:15 a.m. 7:30 - Busses 7:30 - Busses leaveleave from from

Wilkinson lotWilkinson lot 10:00 - Seal Rock 10:00 - Seal Rock

volcanic rocks and tide volcanic rocks and tide poolspools

11:30 - Lunch at Seal 11:30 - Lunch at Seal Rock Rock (bring your own; eat lunch in busses if weather is bad)

12 noon - Travel to 12 noon - Travel to HMSCHMSC

12:30 - HMSC Visitor 12:30 - HMSC Visitor CenterCenter

2:002:00ishish - Return to - Return to CorvallisCorvallis

Back by ~4:30 p.m.Back by ~4:30 p.m.