Describe the effects of temperature, moisture, length ofphotosynthetic period, and nutrient availability on net primary productivity in terrestrialecosystems. Which of the two main food chains is more dominant in terrestrial ecosystems andwhy?

 

Answer:

Temperature:
An increased temperature would increase photosynthesis, as it canbring enzymes to an optimal temperature. However, too high andeverything slows down, and an increased temperature can also bringincreased humidity... Therefore, net productivity goes up.
Moisture:
Increased humidity will decrease photosynthesis because it's harderfor plants to transpire, therefore not being able to exchangevaluable gases. Net productivity goes down.
Length of Photosynthetic Period:
Usually, the longer the photosynthetic period the better. More timein that great sunshine, more sugars, more photosynthesis. Netproductivity gos up.
Nutrient Availability:
The more resources, the more times you can run that photosynthesiscycle. There'll be fewer limits on certain increments of thisprocess. Net productivity goes up.