Exam 26: Biomass Production

As measured by satellite imagery, ocean chlorophyll concentrations are greatest in the tropics.

Which organisms are most active in the chemical attenuation of plant litter?

In the majority of experiments, marine productivity increases most where experimenters added

Animals respond to ecosystem nutrient availability but cannot affect it.

Animal carcasses decay at a slower rate than plant material.

The higher the decomposition constant, the faster the rate of decomposition.

Across the globe, increasing precipitation always increases net primary productivity.

During decomposition, the mass of litter remaining increases as temperature increases.

Net primary production is higher in tropical forests than temperate forests.

Residence time of litter, or time required for litter to decompose is

After a given time, the mass remaining of litter decreases if the lignin content is _______ and the nitrogen content is ______.

Primary production consumed in an ecosystem generally increases as _________ and _________ concentrations increase.

The end result of decomposition is

If aspen leaves are relatively high in nitrogen and low lignin, while beech leaves are relatively low in nitrogen and higher in tannin, beech leaves should decompose faster than aspen leaves.

Dead zones are marine areas with

Decomposition decreases as net primary production increases.

The two most important factors limiting primary production in aquatic environments are

When arctic foxes were introduced onto same Aleutian Islands, guano input ________ and grass cover _______.

The efficiency of gross primary production is greatest in

Generally, the greater the temperature, the higher the net primary productivity.