Matter Cycling in Matter Cycling in EcosystemsEcosystems

Matter Cycling in Matter Cycling in EcosystemsEcosystems

PA StandardsPA Standards 3.1.12.E: Unifying Themes3.1.12.E: Unifying Themes 3.1.12.A: Unifying Themes3.1.12.A: Unifying Themes 4.2.12.C: Renewable and 4.2.12.C: Renewable and

Nonrenewable ResourcesNonrenewable Resources

““All things come from earth, All things come from earth, and to earth they all and to earth they all return.”return.”- - Menander (342-290 B.C.)Menander (342-290 B.C.)

Evaluate change in Evaluate change in natural and physical natural and physical systems.systems.

Describe how changes in Describe how changes in physical and biological physical and biological indicators reflect indicators reflect changes in systems.changes in systems.

Analyze the factors that Analyze the factors that influence the availability influence the availability of natural resources.of natural resources.

Key QuestionsKey Questions

What happens to matter in an What happens to matter in an ecosystem?ecosystem?

What are the major nutrient cycles?What are the major nutrient cycles? What limits growth in an ecosystem?What limits growth in an ecosystem? How do nutrients cycle through How do nutrients cycle through

ecosystems?ecosystems?

What happens to matter What happens to matter in an ecosystem?in an ecosystem?

MATTER CYCLING IN MATTER CYCLING IN ECOSYSTEMSECOSYSTEMS

Nutrient Cycles: Global RecyclingNutrient Cycles: Global Recycling Global CyclesGlobal Cycles recycle nutrients through the recycle nutrients through the

earth’s air, land, water, and living organisms.earth’s air, land, water, and living organisms. NutrientsNutrients are the elements and compounds that are the elements and compounds that

organisms need to live, grow, and reproduce.organisms need to live, grow, and reproduce. BiogeochemicalBiogeochemical cycles move these substances cycles move these substances

through air, water, soil, rock and living through air, water, soil, rock and living organisms.organisms.

What are the major What are the major nutrient cycles?nutrient cycles?

© Brooks/Cole Publishing Company / ITP

Nutrient CyclesNutrient Cycles Nutrient cyclesNutrient cycles

Natural processes that involve the flow of nutrients Natural processes that involve the flow of nutrients from the from the abioticabiotic to the to the bioticbiotic and back again. and back again.

Nutrient cycles involveNutrient cycles involve One–way flow ofOne–way flow of high–quality energyhigh–quality energy from the sun through from the sun through the environment.the environment. Recycling ofRecycling of crucial elements.crucial elements.

N, P, & K are among the major nutrients

© Brooks/Cole Publishing Company / ITP

Fig. 5–15

What limits growth in What limits growth in an ecosystem?an ecosystem?

Factors That Limit Factors That Limit Population GrowthPopulation Growth

Limiting FactorsLimiting Factors Availability of matter and energy resources can Availability of matter and energy resources can

limit the number of organisms in a population.limit the number of organisms in a population.

How do nutrients How do nutrients cycle through cycle through ecosystems?ecosystems?

Mini-Project: Nutrient Mini-Project: Nutrient CycleCycle Major Soil Nutrients:Major Soil Nutrients:

CarbonCarbon NitrogenNitrogen PhosphorusPhosphorus SulfurSulfur PotassiumPotassium

You will research the following:You will research the following: The roles of the nutrient in an ecosystem (at least 4).The roles of the nutrient in an ecosystem (at least 4). Is it a Is it a limiting factorlimiting factor? If so, describe how.? If so, describe how. A diagram of the cycle.A diagram of the cycle. Explanation of the main processes of the cycle (each part of the Explanation of the main processes of the cycle (each part of the

cycle).cycle). Human and natural influences on the cycle (at least 5 total).Human and natural influences on the cycle (at least 5 total). Does the nutrient contribute to Does the nutrient contribute to eutrophicationeutrophication??

Limit the use of words on your slides. Focus on using Limit the use of words on your slides. Focus on using diagrams and images.diagrams and images.

Review Key QuestionsReview Key Questions

What happens to matter in an What happens to matter in an ecosystem?ecosystem?

What are the major nutrient cycles?What are the major nutrient cycles? What limits growth in an ecosystem?What limits growth in an ecosystem? How do nutrients cycle through How do nutrients cycle through

ecosystems?ecosystems?

Thought ProblemThought Problem

Why do farmers not need to apply certain Why do farmers not need to apply certain nutrients, such as carbon, to grow crops nutrients, such as carbon, to grow crops but often need to add fertilizer, such as but often need to add fertilizer, such as nitrogen and phosphorus?nitrogen and phosphorus?

LabLab

Physical and Chemical Properties of SoilPhysical and Chemical Properties of Soil