Deck 24: Freshwater Biomes

Question 1

In stratified temperate freshwater lakes, the upper layer is called the

A) Hypolimnion
B) Thermocline
C) Epilimnion
D) Epihypocline
E) Compensation point

Answer 1

Epilimnion

Question 2

Aquatic organisms that need high oxygen levels cannot live in the

A) Hypolimnion
B) Thermocline
C) Epilimnion
D) Epihypocline
E) Compensation point

Answer 2

Hypolimnion

Question 3

In freshwater lakes, the level at which photosynthate production equals the energy used up by respiration is known as the

A) Epilimnion
B) Compensation point
C) Hypocline
D) Hyolimnion
E) Thermocline

Answer 3

Compensation point

Question 4

The largest completely freshwater lake in the world, by area, is

A) Lake Michigan
B) Lake Superior
C) Lake Victoria
D) Lake Baikal
E) Lake Tanganyika

Question 5

Most of the world's freshwater lakes are found in

A) Brazil
B) Russia
C) Canada
D) The United States
E) Zaire

Question 6

In the US Midwest, vernal pools are also known as

A) Bogs
B) Marshes
C) Wet meadows
D) Eutrophic lakes
E) Prairie potholes

Question 7

Bogs are most common in

A) Temperate deciduous forest
B) Taiga and tundra
C) Tropical deciduous forest
D) Savanna
E) Prairie

Question 8

If you could see cattails, cypress and crayfish, in what biome would you most likely be?

A) Estuary
B) Lake
C) Wetland
D) River

Question 9

Which of the following properties of a river are greatest near the headwaters?

A) Channel depth
B) Mean flow velocity
C) Bed material grain size
D) Stream discharge volume
E) Volume of stored alluvium

Question 10

Which is not one of the world's largest wetlands?

A) Pantanal
B) West Siberian lowland
C) Lake Chad Basin
D) Amazon River Basin
E) Great Australian lowland

Question 11

Which of the following features are greatest in the deposition zone of a river?

A) Current
B) Oxygen level
C) Channel depth
D) Water velocity
E) Clarity

Question 12

The discharge of a river, Q, is related to the velocity, V, average width, W, and average depth, D, by the equation Q=

A) V*W*D
B) (V*W)/D
C) V/(D*W)
D) (V*D)/W

Question 13

Riparian zones are

A) Areas that are continually wet and fruit is always ripe
B) Vegetated areas around the banks of rivers and streams where plant roots can tap into groundwater
C) Wetland areas where there is always shallow surface water
D) Lentic habitats that are also eutrophic
E) Oligotrophic marshes or swamps

Question 14

Chlorophyll concentration is highest in the _________ part of an estuary.

A) Head
B) Middle
C) Mouth
D) Thermocline
E) Epicline

Question 15

A pycnocline is

A) The area of a lake with low dissolved oxygen
B) The area of a lake warmed by the sun and mixed well by the wind
C) In a lake, the point at which photosynthate production equals the energy used up by respiration
D) The boundary between the fresh and salty water in an estuary
E) In a lake, the transition between the epilimnion and the hypolimnion

Question 16

In an estuary, the number of brackish water species is ________ than the number of freshwater species and ________ then the number of marine species.

A) Less, less
B) Greater, greater
C) Less, greater
D) Greater, less

Question 17

Tropical lakes are isothermal but temperate lakes are never isothermal.

Question 18

Tropical lakes can accumulate large amounts of carbon dioxide.

Question 19

The least productive lakes are called oligotrophic.

Question 20

Eventually, eutrophic lakes degrade into oligotrophic lakes.

Question 21

Tropical lakes hold lower amounts of dissolved oxygen than the temperate lakes.

Question 22

Rivers are lentic habitats.

Question 23

Caddis flies live in rivers and are known as collectors

Question 24

In a pycnocline, the salt water forms a wedge under the fresh water.