OCE1001 chpt 13 HW – Flashcards
Unlock all answers in this set
Unlock answersquestion
Which of the following areas had the highest primary productivity in September 2009
answer
Luang Prabang, Laos
question
Which of the following areas had the highest variation in primary productivity over the course of a year
answer
Norton, Kentucky
question
Which of the following statements correctly explain why biological productivity in the tropical ocean is so meager when compared to biological productivity on land in tropical environments?
answer
- The permanent thermocline presents a barrier that keeps nutrients in deeper water from mixing with surface waters.
- The sunlight penetrates deep into the tropical ocean, warming the surface waters and creating stratification of water masses.
question
Key (Red)
answer
line for phytoplankton
question
Key (Green)
answer
line for zooplankton
question
Approximately November-Februrary
answer
continuous darkness
question
Approximately March-October
answer
continuous sunlight
question
Increase (Red)
answer
diatom population peaks
question
Increase (Green)
answer
copepod population peaks
question
Consider what would happen if the euphotic zone became cloudy from sediment-rich runoff from a storm near the coast. Read the sentences below, and fill in the blanks to make them complete and correct
answer
-phytoplankton
- zooplankton
-producers
- aphotic zone
- low
- vertical
question
During which time period was the growth of fish captures greatest?
answer
1955 to 1970
question
Choose the likeliest explanation for the trend shown in the graph in Step 2
answer
Most potential fisheries in the world's oceans had been discovered by about 1970.
question
For the graph in Step 3, which development stage has most frequently represented the highest proportion of fisheries resources since 1954
answer
developing
question
Which development stage(s) increased in proportion by more than 20% since 1954
answer
both fully developed and senescent
question
Choose the best statement for how the graph in Step 5 explains the global fish capture trends in Step 1.
answer
Fully developed and senescent fisheries have been increasing relative to others, leading to slowed growth in the global fish catch
question
For Projection 2 in Step 5, which resource stage represents roughly 50% of all resources in 2025
answer
rapidly declining fish captures
question
If Projection 2 holds true, choose the most likely trend for global fish captures over the next 40 years
answer
stable or slightly declining fish captures
question
On the image below, match the following types of radiation with the letters indicating their positions on the spectrum of wavelengths.
answer
F. Microwaves and radar
C. AM radio
D. Infrared
E. Gamma rays
A. Ultraviolet
B. X rays
question
Match the following productivity levels with the correct letters
answer
B. highest productivity
C. intermediate productivity
A. lowest productivity
question
This cross-section shows the movement of water masses near Antarctica. Match the correct letter with each of the following water masses
answer
C. North Atlantic Deep Water
B. Antarctic Intermediate Water
A. Antarctic Bottom Water
question
Match each curve on the graph with the correct factor.
answer
A. sunlight
C. Nutrients
D. Zooplankton
B. Phytoplankton
question
On the pie diagram below, match the letters with each ecosystem's contribution to the total world fishery
answer
E. coastal and coral
A. open ocean
C. tropical shelves
D. non-tropical shelves
B upwellings
