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