Deck #2 Flashcards
K selected organisms
- Reproduce later in life.
- Produce fewer offspring.
- Devote significant time and energy into their offspring.
- For them it is important to put time and energy into their offspring since they have so few of them.
- Examples include humans, lions and cues.
R selected organisms
- Reproduce early in life and often.
- Have a high capacity for reproductive growth.
- Examples include: bacteria, algae and Protozoa.
- Not much care is given to the offspring, but due to the large numbers, the populations continue to survive.
Actual growth rate percent formula
Birth rate - death rate
divided by 10.
Crude birth rate
Equal to the number of live births per 1000 members of the population in a year.
Crude death rate
Equal to the number of deaths per 1000 members of the population in a year.
Total fertility rate
The number of children a woman will bear during her lifetime.
Replacement birth rate
The number of children a couple must have in order to replace themselves in a population.
Carrying capacity (K)
Defined as the maximum population size that can sustainably be supported by the available resources in the region.
Logistical growth
Says that when populations are well below the size dictated by carrying capacity, their growth rate will decrease and the size of the population will eventually become stable.