Energy Flow and Nutrient Cycling UQ UQ Food Web: interconnected food.

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Presentation transcript:

Energy Flow and Nutrient Cycling UQ UQ Food Web: interconnected food chains in an ecosystem

Phytoplankton and Zooplankton

Questions (pg 91) 1. Which one more accurately shows energy flow? Why? 2. What are the 2 main types of food webs? 3. Are they connected? 4. What is the top consumer for both types? Why? » Create a food web containing a minimum of 8 animals

Nutrient Cycling Plants need nutrients from the soil to grow, just like people need food. Soil nutrients mostly come from the breakdown of mineral- bearing rocks and from organic matter, which comes from the decomposition of plants and animals. The nutrients that plants get from the soil are stored in all plant tissues, such as leaves, stems and flowers. When these tissues fall to the ground they start to break down, and together with decomposing dead insects, dead animals and animal feces, they are eventually re-incorporated into the soil by rainfall and earthworms. There, the organic matter is further broken down and slowly transformed to become nutrients that are available to growing plants (and the cycle continues).

Water Cycle QBs

Water Cycle Vocab Evaporation - liquid to gas (water vapor) Condensation - water vapor condenses into water

Precipitation - condensation falling onto land out of the air Transpiration – plants release water into the air

Carbon Cycle A nutrient = a chemical/substance your body needs to grow but can’t make itself (must be taken from your environment) A carbon sink = anything that absorbs more carbon that it releases A carbon source = anything that releases more carbon than it absorbs

The Carbon Cycle

Interactives/Carbon-cycle

Photosynthesis H2O + sunlight+ CO2 = O2 + glucose Occurs in plant leaves, specifically the chloroplasts

Nitrogen Cycle Air is 78% nitrogen Plants can’t use atmospheric nitrogen (N2) Nitrogen fixation – bacteria changes atmospheric nitrogen (N2) into a form of N that plants can use

Nitrogen Cycle Can get N from fertilizer Plants use N to make amino acids which make plant proteins. Animals eat plants and use the plant amino acids to make protein