Organisms and Ecosystems
The Levels of an Ecosystem
The simplest level of organization in the living world is the organism. An organism is any living thing. Each organism is a member of a species. A species is a group of organisms that share most characteristics and can breed with one another. The second level of organization is the population. All the organisms of a species that live in the same place at the same time make up a population. A community is made up of all the populations that live in an area at the same time. Populations in a community interact in many ways. Populations compete with each other for water, space, and other resources. The next level of organization is the ecosystem. An ecosystem is made up of one or more communities and their nonliving environment.
Three Categories of an Ecosystem
- There are many types of ecosystems on earth.
- Major classes of relatively contained ecosystems are called Biomes.
- There are 3 Major classes of ecosystems
- Freshwater Ecosystems
- Terrestrial Ecosystems
- Ocean Ecosystems
An Organism's niche and its habitat in an ecosystem
There are five aquatic ducks from the bird family all in the same habitat tending to a certain niche, so their ecosystem can maintain pleasing to them. They all live in the are but do different things, in separate parts of the pond or lake.