Course: Science Subtest II
Lesson: Ecology
Topic: Introduction to Ecology      Page 12 of 18  

An Ecosystem is an Ecological Community that Functions as a Unit

Ecosystems are ecological communities that function as a units. Each ecosystem is comprised of all of the flora and fauna and abiotic features within the ecosystem.The types of organisms living in an ecosystem are determined byinteractions between environmental conditions, such as rainfall, temperature, humidity, sunlight and soil type.

Communities are groups of organisms from different species living in the same area and interacting with each other

Population is a group of organisms living in an area from the same species similar to a niche

Organism is a single living organism (plant or animal)