A community of organisms and the physical environment with which these organisms interact.
30 elements that are vital to life.
Water and nutrients move back and forth between the biotic and abiotic realms.
A class of consumer that feeds on the remains of dead organisms or cast-off material from living organisms
Special kind of detritvore that breaks down dead or cast-off organic material into its inorganic components, which can then be recycled through an ecosystem.