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Nutrient Cycles - PowerPoint PPT Presentation


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Nutrient Cycles. CARBON. WATER. NITROGEN. PHOSPHOROUS. The Water Cycle. HOME. Precipitation. Water that has condensed in the air forms clouds Drops fall to Earth and accumulate in oceans and lakes. Back to the Water Cycle. Evaporation. Using Water. Using Water.

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Presentation Transcript
slide1

Nutrient Cycles

CARBON

WATER

NITROGEN

PHOSPHOROUS

precipitation
Precipitation
  • Water that has condensed in the air forms clouds
  • Drops fall to Earth and accumulate in oceans and lakes

Back to the Water Cycle

Evaporation

Using Water

using water
Using Water
  • Plants and animals need water to live
  • Water is pulled from bodies of water or from the ground (groundwater)

Back to the Water Cycle

Precipitation

Waste

waste
Waste
  • Plants and animals return water to environment through transpiration
  • Animals return water to ground and bodies of water through urine

Back to the Water Cycle

Using Water

Evaporation

evaporation
Evaporation
  • Water from oceans, lakes, and other bodies of water re-enters the atmosphere through evaporation

Back to the Water Cycle

Waste

Precipitation

photosynthesis
Photosynthesis
  • Plants use CO2 from the atmosphere to make high-energy carbon molecules

Respiration

Gas Exchange

Pollution

Back to the Carbon Cycle

Metabolism

metabolism
Metabolism
  • Organisms use high energy carbon molecules for growth

Respiration

Back to the Carbon Cycle

Photosynthesis

Waste

Decomposition

respiration
Respiration
  • CO2 is released through aerobic respiration (breathing, for example)

Back to the Carbon Cycle

Metabolism

Decomposition

Photosynthesis

waste11
Waste
  • Carbonates released into ground and water supply

Metabolism

Photosynthesis

Decomposition

Back to the Carbon Cycle

Gas Exchange

gas exchange
Gas Exchange
  • CO2 is exchanged between the air and water

Back to the Carbon Cycle

Waste

Photosynthesis

decomposition
Decomposition
  • When organisms die and decay, the carbon molecules in them enter the soil.
  • Microorganisms break down the molecules, releasing CO2

Back to the Carbon Cycle

Photosynthesis

Metabolism

Pollution

pollution
Pollution
  • Remains of dead organisms are converted into fossil fuels (over millions of years!)
  • Combustion of fossil fuels and wood releases CO2

Back to the Carbon Cycle

Metabolism

Using Water

nitrogen fixation
Nitrogen Fixation
  • Lightning and bacteria convert atmospheric nitrogen into nitrates (NO3) and ammonia (NH3)

Back to the Nitrogen Cycle

Protein Production

Return to Atmosphere

protein production
Protein Production
  • Plants use nitrogen molecules to make amino acids

Back to the Nitrogen Cycle

Nitrogen Fixation

Conversion

conversion
Conversion
  • Consumers convert plant proteins to animal proteins

Back to the Nitrogen Cycle

Protein Production

Waste

waste19
Waste
  • Decomposers break down animal and plant matter into nitrogen compounds

Back to the Nitrogen Cycle

Return to Atmosphere

Pollution

Conversion

return to atmosphere
Return to Atmosphere
  • Nitrogen compounds break down into gas and return to air

Back to the Nitrogen Cycle

Waste

Nitrogen Fixation

runoff
Runoff
  • Runoff of nitrates in fertilizers enters groundwater and soil

Back to the Nitrogen Cycle

Protein Production

pollution22
Pollution
  • Nitrous Oxide from burning fossil fuels falls as Nitric Acid in rainwater

Back to the Nitrogen Cycle

Waste

slide24

Question 1: What would happen to primary producers and consumers if nitrogen-fixing bacteria were removed from the ecosystem?

slide25

Question 2: Grandma Johnson had very sentimental feelings toward Johnson Canyon, Utah, where she and her late husband had honeymooned long ago. Her feelings toward this spot were such that upon her death she requested to be buried under a creosote bush overlooking the canyon.

Trace the path of a CARBON atom from Grandma Johnson’s remains to where it could become part of a hawk.

Note: A hawk is a carnivore, but it did NOT dig up and consume Grandma Johnson’s remains!!!