Ecosystems

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Ecosystems

• Campbell Chapter 54

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(No Transcript)
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Primary Productivity

• The measure of photosynthesis that takes place in
  an ecosystem
• How much carbon is assimilated into producers

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Nutrient Reservoirs

• There are four you should be familiar with

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Organic materials available as nutrients

• This includes things like
• Living organisms
• Detritusdead, decaying organisms
• Made available by respiration, decomposition

From http//clarkvision.com/galleries/images.bears
-2004a/web/brown_bear.c09.09.2004.JZ3F3544.b-700.j
pg
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Organic materials unavailable as nutrients

• These are things like coal, oil and peat.
• Made unavailable through fossilization

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Inorganic materials available as nutrients

• Things like soil, water, the atmosphere
• Made available by photosynthesis, assimilation
• Made unavailable through rock formation

From http//tiee.ecoed.net/vol/v3/experiments/soi
l/img/soil5BHR5D.jpg And http//someonewhocares.
org/pics/water_3420_small.jpg
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Inorganic materials unavailable as nutrients

• Found as minerals in rocks
• Made unavailable by rock formation
• Made available by weathering/erosion

From http//en.wikipedia.org/wiki/ImageCalcite-HU
GE.jpg
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Biogeochemical Cycles

• Nutrient cycles that involve both biotic and
  abiotic factors

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Water Cycle
Solar Energy
Condensation
Evaporation
Precipitation
Evapotranspiration
Percolation
Runoff
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Carbon Cycle
CO2
Burning
Cellular Respiration
Photosynthesis
Consumers
Detritivores
Detritus
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Nitrogen Cycle
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Phosphorous Cycle
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Biological Magnification

• Describes the concentration of toxins at higher
  trophic levels due to an increase of ingested
  biomass

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Eutrophication

• Excess algal growth in bodies of water due to
  nutrient overenrichment

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Depletion of the Ozone Layer

• Accumulation of CFCs causes damage to the ozone
  layer
• Hole in ozone layer lessens protection from solar
  UV rays

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Acid Rain

• Precipitation combines with sulfates in the air
  released from pollution to make acid rain.

From http//www.rit.edu/slrbbu/Acidrain.gif