Chapter 3: The Biosphere Section 3-3: Cycles of Matter

Chapter 3: The Biosphere Section 3-3: Cycles of Matter

A. Recycling in the Biosphere Energy moves 1-way but….. Matter is recycled in an ecosystem Energy moves 1-way but….. Matter is recycled in an ecosystem

 3–3Cycles of Matter A.Recycling in the Biosphere B.The Water Cycle C.Nutrient Cycles 1-2. The Carbon Cycle (Oxygen) 3.The Nitrogen Cycle 4.The Phosphorus Cycle D.Nutrient Limitation  3–3Cycles of Matter A.Recycling in the Biosphere B.The Water Cycle C.Nutrient Cycles 1-2. The Carbon Cycle (Oxygen) 3.The Nitrogen Cycle 4.The Phosphorus Cycle D.Nutrient Limitation Section 3-3 Section Outline

 How many times have you had to change your plans because of rain? It probably didn’t help if someone tried to cheer you up by saying, “But we really need the rain.”  However, rain is important. If it didn’t rain, how would living things on land get water?  How many times have you had to change your plans because of rain? It probably didn’t help if someone tried to cheer you up by saying, “But we really need the rain.”  However, rain is important. If it didn’t rain, how would living things on land get water? Section 3-3 Interest Grabber

 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.  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

 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

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

Nitrogen cycle

Phosphorus cycle

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!