Schuster-BMHS

1.

1 point

Which of these would a seine net be a better tool for measuring?

Speciation Speciation Speciation

Biodiversity

Population Size

Abundance

2.

1 point

How are the three mangrove species ordered based on their proximity to the salt water?

Black, Red, White

Red, Black, White

White, Red, Black

Black, White, Red

3.

3 points

Oyster plankton looking to become spat require certain specific characteristics for their permanent habitat. Please select ALL of the requirements that must be met before an oyster plankton can settle out

The habitat can't move (ie float away).

The substrate must be firm and stable.

There must be other oysters there.

The habitat must have adequate tidal movement.

4.

1 point

Scientists debate over the reason that the mullet fish commonly found in estuarine environments jump out of the water. Currently the most accepted rationale for their aeronuatical acrobatics has something to do with the amount of organic material that is decaying here. How are they related?

The bacteria causing the decay use up much of the oxygen found in the water so they jump to gulp air.

The decaying matter creates isolated spots of “toxic water” so they jump to avoid poisoning themselves.

The smell of the decaying matter attracts flying insects so they jump to catch flying insects to eat.

The decaying matter attracts predators so they jump to avoid predation.

5.

1 point

What is the correct life cycle for an oyster?

egg, phytoplankton, spat, adult

egg, spat, phytoplankton, adult

egg, zooplankton, spat, adult

egg, spat, zooplankton, adult

6.

3 points

While seining you capture a fish that your partner believes to be an ambush predator. Which of the following characteristics (more than one may be selected) would lead you to think your partner is correct?

Large mouth

Heavy body

Lunate/forked caudal fin

Round caudal fin

7.

2 points

Use the following information to calculate the total number of stone crab juveniles one would expect to find on a 10 cubic meter oyster bar.

50 oysters per oyster clutch
5000 oysters per cubic meter of oyster bar
25 stone crab juveniles per oyster clutch

25,000 crabs

10,000 crabs 10,000 crabs

5,000 crabs

50,000 crabs

8.

3 points

Please indicate all of the different ways that oysters act as a keystone species for the EMC estuary.

They are a food source for many predators

They build islands

They provide habitat for juvenile species

They filter the water

9.

1 point

Maritime hammocks get their name because

they are a place for boaters and kayakers to rest.

they are near marine environments.

they are elevated peices of land with many shade trees.

they are place for waterfowl to rest.

10.

1 point

How do mangroves benefit coastal human populations with regard to flooding and storm surge?

They provide habitat for displaced birds

They act as an energy source (burning) when there is no power

They trap discarded trash that would cause damage to inland ecosystems.

They act as a buffer to slow the water

11.

1 point

Blue crabs are part of the portunid family of crabs because of their unique back “legs”. What does these special legs allow them to do that most crabs cannot?

It allows them to fight

It allows them to bury into the substrate

It allows them to swim

It allows them to climb out of the water

12.

1 point

A seine net is a size selective tool because it will only allow the sampler to catch organisms that are large enough to not fit through the mesh holes or not powerful enough to swim away freely.

True

False