Interactive Note Taking-Interactions Within Populations Summary

1. Ecosystems-living organisms and physical environment (abiotic-not living)

Community-living factors (biotic) in ecosystems

2.  Population-group of organisms of the same species that can mate and have offspring

3.  Social order = hierarchy

Dominance based on size, hunting ability or reproductive capabilities.

The dominant organism most likely breeds and eats first.

Social order makes sure resources are adequately shared.

4. Organisms compete for basic resources.

Organisms leave=emigration

The supply of resources in an area ultimately controls the growth and size of a population

5.  Territory is another resource that animals compete for.

Territories provide the basic resources the organism needs.

Territories can be claimed by smell, sound, or touch

​Territorial imperative makes sure members have the resources needed

6. Plant populations compete for water, sunlight, soil, nutrients, and space.

Competition may occur due to the inability to move

7.  Organisms can cooperate with each other to meet basic needs

8.  Some populations cooperate by establishing a social order/hierarchy to help with meeting basic needs for the members of a group

9.  Populations cooperate to meet needs such as: food, protection, caring for young, and shelter.

Protection can happen with safety in numbers.  Territorial cooperation-group works together to defend area and young

10.  Animal populations share in raising the young as a form of cooperation.  Some populations cooperate for shelter-work together to protect homes