Ecology
The scientific study of the processes of influencing the distribution and abundance of organisms, the interactions among organisms, and the transformation and the flux of energy and matter
Autecology
The biology of a species and how it interacts with an environment
Population ecology
Drivers of species abundance, spatial patterns, and population growth rates
Community ecology
Relationships among species, species abundance in relation to other species, consumptive, competitive
Ecosystem ecology
Relationship between species and the abiotic environment; how species respond to and influence biogeochemical cycling