Exam 18: Primary Production and Energy Flow

Net primary productivity is the primary productivity of an ecosystem, after subtracting energy lost in

On the Serengeti plain of eastern Africa, intensive grazing by large mammals greatly decreases primary productivity in the grazed areas.

The influences of nutrients and temperatures on ecosystem properties are part of what ecologists call "bottom-up controls."

To test if a nutrient limits ecosystem productivity, you should

Increased primary production fosters ________ secondary production in terrestrial and aquatic ecosystems.

On the Serengeti plain of eastern Africa, large grazing mammals consume what fraction of total primary production?

Tilman and colleagues found that plant functional diversity was ________ plant diversity (number of species) for ecosystem productivity.

Match the evidence -Higher forest primary production

An organism's ________ describes its feeding position within an ecosystem.

What do experimental and observational studies show clearly about how the abundance of consumers change with increased primary production?

"Actual evapotranspiration" for an ecosystem refers to the amount of water that

In an experiment, Benke (1976) found that the average mass gain per larva was 2.909 mg/larva and the mean larval density was 64.6 larvae/m². Please calculate the secondary production (only one significant digit after the decimal).

Primary production is lowest in which ecosystem?

The production of new organic matter, or biomass, by autotrophs in a system is called ________.