Living and non-living things in an area and their interactions
Cycling of nitrogen between soil, water, and the atmosphere
Flow of energy from one organism to another in a food web
Conditions an animal needs to grow and reproduce
Dead plants
Soil
Animals
Sunlight
Meter
Centimeter
Kilometer
All of the above
the place where animals live
unchanging, fragile systems that are easily damaged
a collection of organisms and materials that interact
only found in forests
Resilience
Food webs
Scale
Boundaries