MST COMMUNITY

Community

**A  group of population of different species in an area.**

Habitat

**can be described as all of the biotic and abiotic factors in the area where an organism lives.**

Niche

The unique position occupied by a species

—**Abiotic Conditions**

The range of conditions, such as air temperature and amount or water, that a species can tolerate

Behavior

The time a day a species is active as well as where and when it reproduces are factors.

Fundamental Niche

The entire range of conditions where an organism or species can survive.

The entire range of conditions where an organism or species can survive.

Define Fundamental Niche:

Realized Niche

The actual niche a species occupies.

The actual niche a species occupies.

Define Realized Niche

Competitive Exclusion

Rivalry between two species that use the same niche

Symbiosis

The relationship between different species living in close association with one another

1. Sharp Teeth
2. Spiders build webs
3. Striped camouflaged coat

Adaptation of Predators animals

1. High Bright Colors
2. Mimicry
3. Camouflage

Adaptation of Prey

1. Thorns
2. Sap
3. Poison

Adaptation of Plants

Competition

Results from fundamental niche overlap

one species is eliminated from a community

Define Competitive exclusion:

Two different species compete for a limited resource.

Define Interspecific competition:

Same species compete for limited resource.

Define Intraspecific competition:

Resource Partitioning

A pattern of resource use in which species reduce their use of shared resources

one warbler will eat at the top of a tree, and another will eat near the bottom of a tree.

Define Resource Partitioning

Species Richness

the number of species a community contains

Species diversity

an index combining the number and relative abundance of different species in a community

Keytone species

a species that is critical to an ecosystem

Affects the survival and number of many other organisms in a community