* Niche: A niche is the specific role an organism plays within its ecosystem. It encompasses:
* Habitat: The physical environment an organism lives in.
* Resources: The food, water, shelter, and other necessities the organism uses.
* Interactions: How the organism interacts with other living things (biotic factors) like predators, prey, competitors, and symbionts.
* Influence on the Ecosystem: The impact the organism has on its environment, such as influencing nutrient cycling or providing food for other species.
Example:
* A deer's niche:
* Habitat: Forests and grasslands.
* Resources: Grasses, leaves, acorns, and water.
* Interactions: Prey to wolves, coyotes, and mountain lions; competitor with other herbivores for food; may disperse seeds through their droppings.
* Influence on Ecosystem: Helps control plant growth and contributes to nutrient cycling.
In summary: An organism's niche is not the organism itself, but rather the complex web of relationships and roles it plays within its ecosystem.
