Multiple Choice
An ecologist studying productivity in a sample of grasses measures gross primary productivity as 1000 kcal/m2/yr and autotrophic respiration as 100 kcal/m2/yr.Based on these calculations,the net primary productivity would be
A) 10 kcal/m2/yr.
B) 900 kcal/m2/yr.
C) 1100 kcal/m2/yr.
D) 10,000 kcal/m2/yr.
Correct Answer:

Verified
Correct Answer:
Verified
Q6: The presence of which element is highly
Q7: Within any ecosystem,the two major food chains
Q8: Primary producers form the base of all
Q9: Why might secondary production be lower in
Q10: Net primary productivity cannot be measured in
Q12: Secondary production is limited primarily by<br>A)water availability.<br>B)nutrient
Q13: Primary productivity in forests often increases during
Q14: In all ecosystems,the biomass of primary producers
Q15: Estimates of HANPP range around 20 percent,yet
Q16: Productivity may be expressed in units of