The term population biology is often used interchangeably with population ecology, although population biology is more frequently used in the case of diseases, viruses, and microbes, while the term population ecology is more commonly applied to the study of plants and animals.
Istilah biologi populasi sering digunakan bergantian dengan ekologi populasi, meskipun istilah biologi populasi lebih sering digunakan ketika mempelajari penyakit, virus, dan mikroba, sementara ekologi populasi lebih sering dipakai ketika mempelajari tumbuhan, dan hewan.