ecology has a wide range of disciplines. a few examples would be aquatic ecology, behavioral ecology, or population ecology.

Population

Ecology is the study of living organisms and their relationship to their environment and each other. Types of ecology include, but are not limited to population ecology, community ecology and behavioral ecology.

Any situation in which living organisms and their relationship to their environment and each other is being studied could be considered ecology. And example could be studying the spread of an invasive species in a new environment or studying the relationship between availability of a particular resource and the size of a population.

The EGI ( The Edward Grey Institute ) does a lot of strong research on field ornithology alongside with other aspects of behavioral ecology and zoology.

There are several different disciplines within ecology. Those include animal ecology, population ecology, quantitative ecology, community ecology, and molecular ecology.