APES midterm review

Front

What is Gross Primary Productivity (GPP)?

Back

Gross Primary Productivity (GPP) is the total amount of energy that producers convert to chemical energy in organic molecules per unit of time.

Front

What is a density-dependent limiting factor?

Back

A density-dependent limiting factor is a factor that affects the population size in relation to the population density, such as predation, disease, and competition.

Front

What type of feedback occurs when an increase in a process leads to further increases in that process?

Back

Positive feedback occurs when an increase in a process leads to further increases in that process.

Front

What is the main human activity that contributes to greenhouse gas emissions?

Back

The main human activity that releases greenhouse gases is burning fossil fuels.

Front

What dietary trend is typically observed in more affluent regions of the world?

Back

More affluent regions of the world tend to eat more meat.

Front

Define Net Primary Productivity (NPP).

Back

Net Primary Productivity (NPP) is the amount of energy that remains after producers have used some of the energy for respiration; it is the energy available to consumers.

Front

What is the difference between Gross and Net Primary Productivity?

Back

Gross Primary Productivity (GPP) is the total energy produced by photosynthesis, while Net Primary Productivity (NPP) is the energy available after accounting for the energy used in respiration.

Front

What is an example of a positive feedback loop in climate change?

Back

An example of a positive feedback loop in climate change is the melting of polar ice caps, which reduces albedo and leads to further warming.

Front

What role does predation play in population dynamics?

Back

Predation is a density-dependent limiting factor that can regulate population sizes by controlling the number of individuals in a species.

Front

What is albedo?

Back

Albedo is the measure of how much light that hits a surface is reflected without being absorbed; surfaces with high albedo reflect more light.