Scl # 4 & 5 Salt Marsh And Tidal Flat Flash Quiz

12 Questions | Total Attempts: 280

SettingsSettingsSettings
Scl # 4 & 5 Salt Marsh And Tidal Flat Flash Quiz - Quiz

.


Questions and Answers
  • 1. 
    Spartina alterniflora (marsh cordgrass) is the most abundant and ecologically most important large plant of the marsh. What makes it so important?
    • A. 

      Salt tolerant

    • B. 

      Grows quickly

    • C. 

      Predator tolerant

    • D. 

      Wind and wave tolerant

  • 2. 
    Why do marshes have that characteristically rotten egg odor?
    • A. 

      Decomposition uses much oxygen while releasing hydrogen sulfide. The reduced oxygen level combined with the release of hydrogen sulfide gives the marsh a rotten egg odor.

    • B. 

      Decomposition uses much carbon dioxide while releasing hydrogen sulfide. The reduced carbon dioxide level combined with the release of hydrogen sulfide gives the marsh a rotten egg odor.

    • C. 

      Decomposition uses much hydrogen while releasing carbon dioxide. The reduced hydrogen level combined with the release of carbon dioxide gives the marsh a rotten egg odor.

    • D. 

      Decomposition uses much hydrogen while releasing sulfur. The reduced hydrogen level combined with the release of sulfur gives the marsh a rotten egg odor.

  • 3. 
    What is phytoplankton?
    • A. 

      A microscopic plant that organisms feed on and move with tides and currents.

    • B. 

      A microscopic animal that moves with currents and large aquatic organisms.

    • C. 

      An organism that helps decompose detritus in the marsh.

    • D. 

      An organism that scavengers feed on in the marsh.

  • 4. 
    Because it has a wide variety of plants and animal species occupying a large number of niches, the salt marsh community is one of nature's most self-sustaining ecological systems and is a valuable coastal resource. Being a self-sustaining community means:
    • A. 

      The marsh community supplies virtually all its own needs rather than being dependent on other communities.

    • B. 

      The marsh community is able to provide the nutrients for all other barrier island habitats.

    • C. 

      The marsh community is the basis of the barrier island community.

    • D. 

      The marsh community is fragile and at risk.

  • 5. 
     Why would water temperatures change considerably during a tide cycle in the tidal flats?
    • A. 

      Incoming tides flush in cooler ocean waters. Sound waters are shallower and can therefore heat/cool more quickly.

    • B. 

      Incoming tides flush in warmer ocean waters. Sound waters are shallower and can therefore heat/cool more quickly.

    • C. 

      Incoming tides flush in warm ocean waters. Sound waters are shallower and can therefore warm more quickly.

    • D. 

      Incoming tides flush in cooler ocean waters. Sound waters are shallower and can therefore cool more quickly.

  • 6. 
    Water in the tidal flat has a wide range of salt content.  Why would you suppose this is so?
    • A. 

      During high tide-incoming tides replenish ocean level salinity. During low tide areas of salt marsh are exposed and may have pools of water that when evaporated leave the salt behind creating salty substrate. Evaporation is a factor in intertidal areas. Heavy rains alter the salinity making the sound less salty.

    • B. 

      During low tide-incoming tides replenish ocean level salinity. During low tide areas of salt marsh are exposed and may have pools of water that when evaporated leave the salt behind creating salty substrate. Transpiration is a factor in intertidal areas. Heavy rains alter the salinity making the sound less salty.

    • C. 

      During high tide-incoming tides replenish ocean level salinity. During high tide areas of salt marsh are exposed and may have pools of water that when evaporated leave the salt behind creating salty substrate. Evaporation is a factor in intertidal areas. Heavy rains alter the salinity making the sound less salty.

    • D. 

      During low tide-incoming tides replenish ocean level salinity. During high tide areas of salt marsh are exposed and may have pools of water that when evaporated leave the salt behind creating salty substrate. Evaporation is a factor in intertidal areas. Heavy rains alter the salinity making the sound less salty.

  • 7. 
    Which pelecypod (two-shelled mollusc) when it attaches to a solid object, becomes immobile (sessile), unable to move?
    • A. 

      Eastern Oyster.

    • B. 

      Blue or ribbed mussel.

    • C. 

      Mud snail.

    • D. 

      Scallop

  • 8. 
    In the tidal flats, _________   _________ grain sized sediments are deposited where tide current velocity is strong in the sound. 
    • A. 

      Fine sand

    • B. 

      Coarse sand

    • C. 

      Silt sediment

    • D. 

      Saltated sand

  • 9. 
    ___________ is deposited in the tidal flats where the tides are weak, usually farther up in the estuary. 
    • A. 

      Silt

    • B. 

      Sand

    • C. 

      Sediment

    • D. 

      River rock

  • 10. 
    Dissolved oxygen levels may shift with the seasons in the tidal flats. What causes tidal flat low dissolved oxygen levels in the summer?
    • A. 

      High summer temperatures in shallow water and in the underlying sediments lower the amount of dissolved oxygen.

    • B. 

      High summer temperatures in the sound waters lower the amount of dissolved oxygen.

    • C. 

      High summer temperatures in the underlying sediments lower the amount of dissolved oxygen.

    • D. 

      High summer temperatures in shallow water and the decomposition on the tidal flat shoreline lower the amount of dissolved oxygen.

  • 11. 
    Eel grass in the sound is a protective covering for what mollusk?
    • A. 

      Scallop

    • B. 

      Squid

    • C. 

      Clam

    • D. 

      Oyster

  • 12. 
    What is unique about the oyster crab?
    • A. 

      This crab lives inside the shells of oysters and other bivalves and at times may eat the muscle tissue of the "host" oyster.

    • B. 

      This crab moves into the shell of a dead oyster and inhabits its shell for protection.

    • C. 

      The oyster crab is a host organism for oysters to feed upon.

    • D. 

      The oyster crab hides within a bed of oysters to protect itself.

Back to Top Back to top