Scl # 4 & 5 Salt Marsh And Tidal Flat Flash Quiz
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- 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
Correct Answer
A. Salt tolerantExplanation
Spartina alterniflora, also known as marsh cordgrass, is an ecologically important plant due to its salt tolerance. This means that it can survive and thrive in marsh environments with high levels of salt, where other plants may struggle to grow. Its ability to tolerate salt allows it to play a crucial role in stabilizing marsh ecosystems and preventing erosion. Additionally, its salt tolerance enables it to provide habitat and food sources for various organisms, making it a key component of the marsh ecosystem.Rate this question:
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- 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.
Correct Answer
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.Explanation
The characteristic rotten egg odor in marshes is due to the process of decomposition. Decomposition uses a significant amount of oxygen and releases hydrogen sulfide. As a result, the oxygen level in the marsh is reduced, and the release of hydrogen sulfide contributes to the foul smell.Rate this question:
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- 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.
Correct Answer
A. A microscopic plant that organisms feed on and move with tides and currents.Explanation
Phytoplankton refers to microscopic plants that serve as a food source for organisms and are carried along by tides and currents. This explanation accurately describes the role and behavior of phytoplankton in aquatic ecosystems.Rate this question:
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- 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.
Correct Answer
A. The marsh community supplies virtually all its own needs rather than being dependent on other communities.Explanation
The explanation for the correct answer is that the salt marsh community is considered one of nature's most self-sustaining ecological systems because it supplies virtually all its own needs. This means that the community does not rely heavily on other communities for resources such as nutrients or energy. The presence of a wide variety of plants and animal species occupying different niches allows the marsh community to efficiently utilize available resources and maintain its own ecological balance.Rate this question:
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- 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.
Correct Answer
A. Incoming tides flush in cooler ocean waters. Sound waters are shallower and can therefore heat/cool more quickly.Explanation
During a tide cycle in the tidal flats, the incoming tides flush in cooler ocean waters. This is because the sound waters in the tidal flats are shallower, allowing them to heat or cool more quickly. The shallow waters are more susceptible to temperature changes, so when the cooler ocean waters are brought in by the incoming tides, they cause a considerable change in water temperatures in the tidal flats.Rate this question:
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- 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.
Correct Answer
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.Explanation
The correct answer is that 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 a salty substrate. Evaporation is a factor in intertidal areas, and heavy rains alter the salinity, making the sound less salty. This explanation suggests that the fluctuation in salt content is due to the combination of tidal movements, evaporation, and rainfall, which all contribute to the varying levels of salinity in the tidal flat.Rate this question:
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- 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
Correct Answer
A. Eastern Oyster.Explanation
The Eastern Oyster is the correct answer because when it attaches to a solid object, it becomes immobile and unable to move. This is a characteristic of many pelecypods, including oysters, as they rely on attaching themselves to a substrate for stability and protection. The Blue or ribbed mussel, Mud snail, and Scallop are not necessarily immobile when attached to a solid object, so they are not the correct answer.Rate this question:
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- 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
Correct Answer
A. Fine sandExplanation
In tidal flats, fine sand grain-sized sediments are deposited where tide current velocity is strong in the sound. This suggests that the strong tide current is able to carry and deposit the fine sand particles, while larger particles such as coarse sand or silt sediment may be too heavy to be transported by the current. The saltated sand, which refers to sand particles that are transported by bouncing or hopping along the bottom, may also be too heavy to be deposited in areas with strong tide current velocity.Rate this question:
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- 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
Correct Answer
A. SiltExplanation
Silt is deposited in the tidal flats where the tides are weak, usually farther up in the estuary. This is because silt particles are finer and lighter compared to sand and sediment, allowing them to settle in areas with weaker water currents. The deposition of silt in tidal flats contributes to the formation of mudflats and marshes, which are important habitats for various species of plants and animals.Rate this question:
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- 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.
Correct Answer
A. High summer temperatures in shallow water and in the underlying sediments lower the amount of dissolved oxygen.Explanation
High summer temperatures in shallow water and in the underlying sediments can lead to increased biological activity, causing an increase in oxygen demand. At the same time, warm water holds less dissolved oxygen, leading to a decrease in oxygen levels. Additionally, the decomposition of organic matter on the tidal flat shoreline can further deplete oxygen levels. Therefore, the combination of these factors results in low dissolved oxygen levels in the summer.Rate this question:
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- 11.
Eel grass in the sound is a protective covering for what mollusk?
- A.
Scallop
- B.
Squid
- C.
Clam
- D.
Oyster
Correct Answer
A. ScallopExplanation
Eel grass in the sound serves as a protective covering for scallops. This is because scallops often bury themselves in the eel grass, which provides them with camouflage and protection from predators. The eel grass also provides a suitable habitat for scallops, as it offers them a place to attach themselves and grow. Therefore, the presence of eel grass in the sound is beneficial for the survival and well-being of scallops.Rate this question:
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- 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.
Correct Answer
A. This crab lives inside the shells of oysters and other bivalves and at times may eat the muscle tissue of the "host" oyster.Explanation
The unique characteristic of the oyster crab is that it lives inside the shells of oysters and other bivalves. It also has the ability to eat the muscle tissue of the "host" oyster, making it a parasitic organism.Rate this question:
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Current Version
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Mar 21, 2023Quiz Edited by
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Apr 22, 2015Quiz Created by
Rhaveno
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