| A | B |
|---|
| Organismal ecology | is concerned with how an organism's structure, physiology and behavior meet the challenges posed by its environment |
| Population ecology | analyzes factors that affect population size and how and why it changes through time |
| Community ecology | examines how interactions between species (predation and competition) affect community structure and organization |
| Ecosystem ecology | emphasizes energy flow and chemical cycling between organisms and the environment |
| Landscape ecology | focuses on factors controlling the exchanges of energy, materials, and orgnanisms across multiple ecosystems |
| Global ecology | examines how the regional exchange of energy and materials influences the functioning and distribution of organisms across the biosphere |
| community | group of populations of different species in an area |
| population | a group of individuals of the same species living in an area |
