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Ecology Bio Unit 1
| Term | Definition |
|---|---|
| Photosynthesis | Plants absorb energy from the sun to grow and they become the main source of food for other living things |
| Carbon dioxide and Oxygen cycle | Animals and plants do a trade off. We need each other. We breathe in O2 and breathe out CO2. Plants breath in CO2 and give us O2. |
| Nitrogen Cycle | Nitrogen is important to living things because they need it to make DNA and Proteins |
| Nitrogen Fixation | Bacteria (decomposers) that live on the roots of plants called Legumes (Proteins!) convert nitrogen gas into a solid form (nitrate) |
| Denitrification | Bacteria (decomposers) in the soil breakdown nitrates in the soil into a gas form and release it into the atmosphere |
| Primary Community | Earlier Communites -> they are developing & get replaced (#1-4) |
| Climax Community | Final stage of succession -> permanent, lasts hundreds of years (#5) |
| Primary Succession | Life develops where no life has existed. |
| Pioneer species | First species to live where life has never been. |
| Secondary Succession | Life grows back after it has been destroyed. |
| Human growth | Exponentially for the last 200 years |
| Fossil Fuel | Coal, oil, wood, natural gas. We are using a lot of it and we need to conserve energy and recycle if we want to live long. |
| Global Warming | Caused by air pollution -> increased CO2 levels in the atmosphere. Increases average global temp. |
| Thinning Ozone layer | Caused by chlorofluorocarbons (CFC's). Ex: aerosol paint & hair spray. |
| Greenhouse Effect | Process through which heat is trapped near earths surface by substances known as greenhouse gases (carbon dioxide, methane, ozone, nitrous oxide, CFC's, and water vapor. |
| Estivation | Hibernation |
| Bioaccumulations | Accumulation of bio toxins |
| Niche | Role an organism plays in a community |
| Population Density | Number of individuals living in a certain amount of space. |
| Density dependent | Limits population growth at higher populations |
| Density independent | Limits population growth at any population size |
| Eutrophication | Addition of chemicals such as nitrogen and phosphorus into water supplies. Typically runoff from fertilizer or sewage. Forms algal blooms on water, depletes oxygen levels in water, kills organisms. |
| Pollution | Chemicals and waste in the air and water |
| Deforestation | Trees in a forest are complete cleared for human use. |
| Beach erosion | Shoreline soil is wearing away faster due to human interference and increased water levels in the ocean. |
| Urban development | Habitat destruction, increased pollution, increased erosion |
Created by:
Aden E.
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