From Organisms to Biomes

Unit Assessment 6

From Organisms to BiomesThe simplest level in any environment is an individual organism.

A beaver

Species The next level is

the species. A species

consists of organisms that have common features and can mate with one another.

Two different species of large cats

PopulationThe next level

is a populationA population

consists of all the members of the same species that live in the same place.

A population of deer

Community The next level

contains only living things.

A community includes different populations that live in the same place. A community of animals

Ecosystem The next level

includes living and nonliving things.

An ecosystem consists of all the organisms within a community and the nonliving things with which they interact. An aquatic ecosystem

Biome The next level is a

biome.

A biome is a region that contains groups of similar ecosystems and climates.

A Tropical Rainforest

Biomes1. Desert2. Taiga3. Tundra4. Grassland5. Marine 6. Tropical

rainforest

7. Temperate rainforest

8. Temperate deciduous forest

9. Coniferous forest

10.Freshwater

Biosphere All of these make

up the Biosphere. The part of Earth

that supports life.(This includes the top portion of Earth’s crust, all the waters that cover Earth’s surface and the atmosphere that surround Earth)

The living Earth

Levels of Organization

Biome

Living and Nonliving Factors Any living factor

in an environment is called a biotic factor.

Which include plants, animals, protists and fungi.

Living factors (biotic)

Living and Nonliving Factors Any nonliving

factor in an environment is called an abiotic factor.

These include temperature, oxygen concentration, humidity, and the amount of sunlight

Nonliving factors (abiotic)

(Temperature)

(Sunlight)

Living and Nonliving Factors Abiotic and biotic

factors vary from ecosystem to ecosystem.

And may also vary from time to time in the same ecosystem.

Such as the amount of rainfalland number of plants

A Habitat The place in which

an organism lives.(A habitat provides food, shelter, best temperature and amount of moisture an organism needs to survive.)

Human habitat

Mouse habitat

Symbiotic Relationships Not all

relationships among organisms involve food. Many organisms live together and share resources in other ways.

Any close relationship between species is called symbiosis. Wildebeest and cow birds

Symbiotic RelationshipsA symbiotic

relationship in which both species benefit is called mutualism.

A bee and a flower

A large eel and a small fish

Symbiotic RelationshipsA symbiotic

relationship in which one organism benefits and the other is not affected is called commensalism.

Clown fish and sea anemones

Symbiotic RelationshipsA symbiotic

relationship in which one organism benefits but the other is harmed is called parasitism.

A mosquito

Dog ticks

Niches

One habitat might contain hundreds or even thousands of species.

Competition for resources should make it impossible to survive.

But each species has different requirements for its survival.

Niches

As a result, each species has its own niche.

A niche refers to how an organism survives, how it obtains food and shelter, how it finds a mate and cares for its young, and how it avoids danger.