Marine Biology Test 2

Front 1

Diatoms have an outer shell covering made of ?

Back 1

Silica

Front 2

Dinoflagellates

Back 2

all of the above

Front 3

Plankton is a general term that refers to organisms that?

Back 3

Have limited powers of locomotion with respect to water movement.

Front 4

Mechanisms or factors that affect the sinking rate of planktonic organisms include all of the following EXCEPT?

Back 4

Increasing the Reynolds number by changing the cross sectional area of the body

Front 5

At which depth does the total oxygen produced by phytoplankton equal the total oxygen consumed by phytoplankton?

Back 5

Critical depth

Front 6

Which of these factors has the least impact on primary productivity?

Back 6

Ambient Temperature

Front 7

The secretion of small amounts of metabolites by one species that positively or negatively impact the growth of other species is a phenomenon known as?

Back 7

Biological Conditioning

Front 8

A phytoplankton bloom could not initiate if ?

Back 8

The mixing depth is greater than the critical depth.

Front 9

In the temperate zone, toward the beginning of spring, ...

Back 9

The water column become more stable vertically.

Front 10

In the water column...

Back 10

Bacteria are consumed by protozoans, which provide a link to the larger zooplankton.

Front 11

The presence of a microbial loop is important because ..

Back 11

It means that microbes assimilate DOM back into the food web.

Front 12

The ratio of the number of viruses to bacteria in a typical seawater sample is best approximated by?

Back 12

10:1

Front 13

A key diagnostic characteristic that separates rays and skates from sharks is?

Back 13

Gill slits are lateral in sharks and ventral in skates and rays.

Front 14

Boundary layer effects are important in all of the following except?

Back 14

Ammonia excretion by benthos.

Front 15

Sessile organisms can reduce their drag by all of the following except..

Back 15

Increase surface area.

Front 16

For most marine food pyramids the level with the most number of individuals is the ___ level.

Back 16

Phytoplankton

Front 17

Members of the domain bacteria are

Back 17

All of the above

Front 18

The depth at which light intensity drops such that photosynthetic rates equal rates of cellular respiration is the?

Back 18

Compensation depth

Front 19

The rates at which producers converts solar energy to the chemical energy of chemical compounds minus the energy used during respiration is called?

Back 19

net productivity

Front 20

The one factor that integrates a variety of important controls upon marine primary production is?

Back 20

Hydrography

Front 21

The biomass of phytoplankton available for consumption at higher trophic levels is called?

Back 21

Standing crop

Front 22

The existence of strong, shallow thermocline in temperate regions during summer limits nutrient diffusion from deeper waters and is a control on?

Back 22

Phytoplankton Growth

Front 23

In the temperate atlantic, population declines at the end of the sring phytoplankton bloom are _______ than predicted based on limiting nutrient concentrations

Back 23

More Severe or steeper

Front 24

Seasonal succession of phytoplankton species is more prevelant in?

Back 24

Temperate areas

Front 25

The ammount of total production left to support other trophic levels after losses due to respiration of the primary producers?

Back 25

Gross Primary Production

Front 26

What is the distinction between phutoplankon and zooplankton?

Back 26

How they obtain their organic matter

Front 27

Meroplankton have adult forms that that live ____ and larve that live as ______.

Back 27

Pelagically; Plankton

Front 28

What are clear examples of foundation species?

Back 28

Mangroves

Oysters

Kelp

Spartina

Stony Corals

Sea Grasses

Front 29

Function or role of foundation species?

Back 29

Provides foundation for other species to thrive from.

Front 30

Plankton

Back 30

Suspended at water column

Front 31

Nekton

Back 31

Independent swimmers

Front 32

Neuston

Back 32

Those who live at sea surface

Front 33

Benthos

Back 33

Those who live at the sea floor, like flounder and crab.

Front 34

Match the phytoplankton types with the blanks that best describe them.

A) Dinoflagellates

B) Diatoms

C) Both

Back 34

1. Dominate subtropical and tropical phytoplankton (A)

2. Dominant summer and fall phytoplankton in temperate zones (A)

3. Free-living forms posses two flagella (A)

4. Utilize silicon dioxide as a micro nutrient (B)

5. In the size range from nano to microplankton (C)

6. Has spines and complex ridges and spores (C)

7. Pennate symmetry in benthic forms (B)

8. Apparent radial symmetry in planktonic (B)

9. Often responsible for algal blooms (A)

10. Characteristic initiators of the spring bloom (B)

11. Dominate phytoplankton in higher latitudes (B)

12. Important Eukaryotic phytoplankton (C)

Front 35

Summarize three main steps that lead to summer bloom.

Back 35

1.) Winter mixing starts to up-well surface nutrients

2.) Water column Stabilizes

3.) Diatoms come to the surface