Pertaining to nonliving things.
The relative number of individuals of each age in a population.
Pertaining to the living organisms in the environment.
The entire portion of Earth that is inhabited by life; the sum of all the planetıs communities and ecosystems.
All the organisms that inhabit a particular area; an assemblage of populations of different species living close enough together for potential interaction.
The study of statistics relating to births and deaths in populations.
The number of individuals per unit area or volume.
The distribution of individuals within geographical population boundaries.
The study of how organisms interact with their environments.
A level of ecological study that includes all the organisms in a given area as well as the abiotic factors with which they interact; a community and its physical environment.
A group of individuals of one species that live in a particular geographic area.