Soil
Dead plants
Animals
Sunlight
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
Boundaries
Food webs
Scale
Resilience
Centimeter
Kilometer
Meter
All of the above
unchanging, fragile systems that are easily damaged
only found in forests
the place where animals live
a collection of organisms and materials that interact