The most important of them are 

Genetic Diversity

Species Diversity 

Ecological diversity

TLS Online TPP Program

#Id: 8421

#Unit 10. Ecological Principles

Human populations can exist at equilibrium densities in one of two ways:

1. High birth and high death rates

2. Low birth and low death rate

TLS Online TPP Program

#Id: 8422

#Unit 10. Ecological Principles

The difference between the birth rate and the death rate determines the rate of natural increase or decrease

TLS Online TPP Program

#Id: 8423

#Unit 10. Ecological Principles

Parental investment - The amount of time and energy given to an offspring by its parents. 

Longevity - The life span of an organism. Also known as Life expectancy

TLS Online TPP Program

#Id: 8424

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 8425

#Unit 10. Ecological Principles

Fecundity - The number of offspring produced by an organism per reproductive episode. 

Parity - The number of reproductive episodes an organism experiences. 

TLS Online TPP Program

#Id: 8426

#Unit 10. Ecological Principles

Senescence - A gradual decrease in fecundity and an increase in the probability of mortality.