Rocky Intertidal Zones

Competition for which resource is a dominant factor in the rocky intertidal zone?

• food

• light

• oxygen

• space

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which organism is pictured?

• limpet

• seastar

• barnacle

• periwinkle

The pattern of species living only in particular areas of rock in the intertidal zone is called

• subsiding

• succession

• vertical zonation

• climax community

In Pierce's experiment in Washington on keystone species, which species took over the rocks when the sea stars were removed?

• barnacles

• anemones

• mussels

• nothing changed

Tags

NGSS.MS-LS2-4

Why are organisms in the upper intertidal zone typically more tolerant of environmental extremes than those in the lower zones?

• They have access to more food sources.

• They are smaller in size, which makes them more adaptable.

• They have evolved adaptations to withstand longer periods of exposure to air and sunlight.

• They are closer to freshwater sources.

Tags

NGSS.MS-LS4-4

Which is considered a keystone predator in the middle intertidal zone?

• birds

• crabs

• limpets

• sea stars

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

The lower limit of the intertidal zone is the:

• Average high tide.

• Average middle tide.

• Lowest low tide.

• Lowest edge of the rocky substrate.

Besides fluctuations in salinity and water levels, intertidal organisms must also withstand wide variations in:

• Temperature.

• Light level.

• Sediment deposition.

• Current velocity.

Tags

NGSS.MS-LS1-5

Vertical zonation on rocky shores is mostly the result of differences in tolerance to:

• Wave action

• Exposure.

• Predation.

• Light.

Holes, cracks, or crevices where seawater collects as the tide goes out.

• tide pools

• tide zones

• tidal waves

• tidal shore

Tags

NGSS.MS-LS2-3