PhosphorusCycle Cycle 4. D. D. Nutrient Limitation Limitation Nutrient Interest Grabber
Section 3-3 Its Raining, Its Pouring How many times have you had to change your plans because of rain? It probably didnt help if someone tried to cheer you up by saying, But we really need the rain. However, rain is important. If it didnt rain, how would living things on land get water?
1. When rain falls on the ground, it either soaks into the soil or runs across the surface of the soil. When rainwater runs across the land, what body of water might collect the rain? 2. From here, where might the water flow? 3. After the rain, the sun comes out and the land dries. Where does the water that had been on the land go? 4. Construct a diagram that would illustrate all the places a molecule of water might go. Begin with a raindrop and end with a cloud.
Section 3-3 Interest Grabber continued Energy & other needs As we have seen, energy is crucial to an ecosystem Organisms in an ecosystem need the following to survive
Water Minerals Oxygen Carbon Hydrogen Nitrogen
Elements common on earth; must be in usable form Bio Geo Chemical Cycles Matter is recycled within and between ecosystems Elements & compounds move from one another & the biosphere through BIO-GEO-CHEMICAL cycles
The passing around of molecules! Living Things & Cycles Organisms do not use up matter, they transform matter For example: Carbon passes
through photosynthetic organisms and then heterotrophs, then is released as CO2 - for millions of years! Matter Cycles Water Cycle (#1 page 75) Nutrient Cycles
Carbon Cycle (#2 page 76-77) Nitrogen Cycle (#3 page 78) Phosphorus Cycle (#4 page 79) Read your assigned pages and fill out the notes section that relates to your cycle Be ready to share your new-found knowledge with others! Water cycle Carbon cycle
QuickTime and a decompressor are needed to see this picture. Nitrogen cycle QuickTime and a decompressor are needed to see this picture. Phosphorus cycle
QuickTime and a decompressor are needed to see this picture. QuickTime and a Sorenson Video 3 decompressor are needed to see this picture. LIMITING NUTRIENTS A limiting nutrient is one that is essential for the producers of an ecosystem - but is often in short
supply In the saltwater environments, nitrogen is the limiting nutrient In freshwater environments, phosphorus is usually the limiting nutrient Limiting Nutrients What did we observe in the lab? Did one culture grow faster than another? Why - what was happening? What is an algal bloom? When an aquatic system receives a large
input of nutrients (I.e. runoff from fertilized lawns), algae grows like crazy - can be harmful to the environment Can lead to EUTROPHICATION! The Huron / Portage Lake are influenced by these cycles!
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