or How Do We Live Together? Interactions of Life or How Do We Live Together? Martin 2009

Ecology Ecology: The study of the interactions of organisms with each other and with their environment Martin

The Biosphere The part of the earth that supports life is called the Biosphere The top portion of the earth’s crust All waters The atmosphere Martin

Ecosystems Ecosystem includes Biotic factors: All the living organisms in an area Abiotic Factors: All the nonliving features of the environment (water, temperature, sunlight, soil) “Bio” means _____________? Martin

Review: Community: all the populations in an area Population: all the organisms of a single species that live share a gene pool (live close enough to interbreed) Species: organisms with similar characteristics that can interbreed to produce fertile offspring Martin

Putting it Together Martin

A Pond Community: What populations live in this community? What abiotic factors could impact this community? Martin

Habitat The place where an organism lives is its habitat. This howler monkey lives in a rainforest ecosystem. Its habitat is the forest canopy Martin

Habitat This capybara also lives in the rainforest ecosystem, but its habitat is the forest floor Martin

Limits on Population Size Competition Food Space Limiting factors Anything that restricts the number of individuals (food, nesting sites) Martin

Carrying Capacity The largest number of individuals of one species that an ecosystem can support is called the Carrying Capacity Martin

Feeding Interactions Producers: use outside energy (sun) to make energy-rich molecules (glucose) Primary Consumers: eat producers Secondary Consumers: eat primary consumers Tertiary Consumers: eat secondary consumers Martin

A Food Web Martin

Another Food Web Martin

One Biosphere, One Chance Tundra Taiga Martin

One Biosphere, One Chance Grasslands Temperate Deciduous Forest Martin

One Biosphere, One chance Tropical Rainforest Desert Martin

One Biosphere, One Chance Freshwater Marine Martin

Our Responsibility Martin