Biotic factors and abiotic factors + relationships

describe how temperature affects population size

above optimum, enzymes denature, reducing populations carrying capacity

describe how light affects population size

the rate of photosynthesis increases when light intensity increases, faster plants grow, more spores produced, higher carrying capacity

Humidity affects

transpiration + evaporation

Describe intraspecific competition

when individuals of the same species compete with one another for resources such as food, water, breeding sites

describe interspecific competition

when individuals of different species compete for resources such as food, light , water

what does the competitive exclusion principle state

where two species are competing for limited resources, the one that uses the resources more effectively will eliminate other. No two species occupy same niche when resources are limited.

What is a predator

an organism that feeds on a prey

what is predation

When one organism is consumed by another

describe a predator prey relationship

• predators eat their prey, prey population reduces

• less prey, predators are in greater competition with eachother, population reduced, less survive and reproduce

• fewer predators, less prey are eaten, more survive and reproduce, prey population increases

• more available food, predator population increases