Exam 54: Ecosystems

Herbivores are ____ energy transfer(s) away from the sun.

The largest reservoir of phosphorus is the ____.

Oceans and the tropical rain forests contribute equally to global productivity.

The products of ____ are N₂O and N₂.

Ocean acidification is caused by ____.

Which factor has caused primary productivity in Amazon forests to decline steadily over the past 30 years?

Climate change leads to ____, which releases additional carbon dioxide into the atmosphere.

Compared to other regions, day length is ____ and sunlight intensity is ____ near the equator.

Which factors govern the rate of primary productivity in freshwater and marine ecosystems?

About how much solar energy is intercepted by Earth every minute?

Nearly all ecosystems receive a constant input of energy from ____.

Which carbon reservoir contains the most carbon?

How do agricultural practices affect the nitrogen cycle?

A ____ restricts productivity.

Once in the ocean, most of the available phosphorous ____.

Assimilation efficiency is the ratio of ____.

Sedimentation converts ions and particles from the ____ into rocks of the ____.

Which forms of nitrogen are readily usable by plants?

Which three factors determine the ecological efficiencies of consumers?

Biogeochemical cycles describe ____.