Lakes

Question 1

Is Lake a lentic System or Lotic ecosystem?

Answer 1

Lentic ecosystem

Question 2

What is a compensation depth?

Answer 2

The depth at which photosynthesis production = energy used up by respiration

Question 3

What is the name of lake zone near to the coast of lake

Answer 3

Littoral zone

Question 3

What is the name of the lower water zone of lake?

Answer 3

Profundal zone

Question 4

What is the name of the surface water zone of lake?

Answer 4

Limnetic zone

Question 5

What types of plant can be found in the littoral zone?

Answer 5

rooted (Emergent, subemergent) and floating plant

Question 6

What is the adaptation of floating plant in littoral zone?

Answer 6

Highly developed aerating system (aerenchyma 通氣組織); direct gaseous exchange through leaves; absence of cuticles

Question 7

What is the adaptation of fish in littoral zone?

Answer 7

Lack of strong laterial muscles for swimming in swift water

Question 8

Who contributes to the primary production of littorial zone?

Answer 8

Rooted plant and phytoplankton

Question 9

In large lakes, Phytoplankton produce more total biomass than rooted plants in littoral zone.

Answer 9

True

Question 10

Oxygen is abundant in profundal zone.

Answer 10

False

Question 11

Green Plants are absent in profundal zone.

Answer 11

True

Question 12

What is the type of species that can found in profundal zone?

Answer 12

Bacterial, fungi (decomposers), fish, cladocerans

Question 13

What is the name of bottom layer zone of lake?

Answer 13

Benthic zone

Question 14

What is the type of species that can found in benthic zone?

Answer 14

Anaerobic bacteria, periphyton

Question 15

Eutrophic lakes have a higher turbidity

Answer 15

True

Question 16

Oligotrophic lakes have higher levels of oxygens

Answer 16

True

Question 17

Eutrophic lakes carries low level of phosphates and nitrates

Answer 17

False

Question 18

Oligotrophic lakes have higher levels of blue green algae

Answer 18

True

Question 19

Eutrophication is a natural process

Answer 19

True

Question 20

Freshwater system is mostly limited by:
A. nitrogen
B. phosphorus
C. ammonium
D. potassium

Answer 20

B. phosphorus

Question 21

The decline of Oxygen level in oligotrophic lakes down the bottom is larger than that of eutrophic lakes.

Answer 21

False

Question 22

Cultural eutrophication is characterized by a bloom of blue-green algae.

Answer 22

True

Question 23

Human accelerated the eutrophication process.

Answer 23

True

Question 24

Temperature in lakes fluctuate in a daily basis.

Answer 24

False

Question 25

Which of the following statements regarding to the relationship between O2 Solubility and other physical parameter is correct?
(1) When temperature increases, O2 solubility decreases
(2) When pressure decrease, solubility of O2 increase
(3) When Salinity increase, solubility of O2 increase

Answer 25

(1) only

Question 26

Large amount of O2 has been used up in lakes in winter

Answer 26

False

Question 27

Oxygen stratification in lake starts in

Answer 27

Summer

Question 28

Temperature stratification in lake starts in

Answer 28

Winter

Question 29

In Autumn, lake water losses heat through

Answer 29

Convection, conduction, radiation

Question 30

The process of water circulation with the replenishment of oxygen and nutrient in Spring and Autumn is called

Answer 30

Overturn

Question 31

What is the 3 stratification layers in lake water?

Answer 31

Epilimnion (highest O2, △Temp < 1℃/-1m);
Metalimnion (thermocline, △Temp > 1℃/-1m);
Hypolimnion (bottom, △Temp < 1℃/-1m)

Question 32

Oxygen is the most important limiting factor in lentic ecosystems

Answer 32

True

Question 33

The most limiting nutrient in marine ecosystem are
A. nitrogen
B. potassium
C. phosphorus
D. carbon

Answer 33

A. nitrogen