Coastal Habitats Chapter 12 Oregon Coast Field Trip

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Coastal HabitatsChapter 12Oregon 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
30thdusk.geo.orst.edu/oceans/field.html

• Be here by 715 a.m.
• 730 - Busses leave from Wilkinson lot
• 830 - HMSC Visitor Center
• 1000 - Travel to Seal Rock State Park

• 1030 - Seal Rock volcanic rocks and tide pools
• 1200 - Lunch at Seal Rock (bring your own)
• 1230ish - Return to Corvallis
• Back by 200

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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 500 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 Zoneperiwinkle 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