Geography and Oceanography - Chapter 22 potx

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 21
st
2011


dusk.geo.orst.edu/oceans/field.html
dusk.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

leave
leave
from
from
Wilkinson lot
Wilkinson lot
◆
10:00 - Seal Rock
10:00 - Seal Rock
volcanic rocks and tide
volcanic rocks and tide
pools
pools
◆
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
HMSC
HMSC
◆
12:30 - HMSC Visitor
12:30 - HMSC Visitor
Center
Center

◆
2:00
2:00
ish
ish
- Return to
- Return to
Corvallis
Corvallis
◆
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 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
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 &
intertidal
rock louse & sea roaches scavenge organic debris
High Tide Zone:
filter-feed seawater / larvae are planktonic
limpets, buckshot barnacles
Oregon Limpet
Chiton Tonicella
mollusc 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