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NEEDS OF ORGANISMSAll organisms need
more then just Energy95 percent of body is
made up of just 4 elements:HydrogenOxygenNitrogenCarbon
RECYCLING IN THE BIOSPHEREMatter is recycled in ecosystemsBiogeochemical cycles = chemicals
are passed from one organism to another (BIO), and also travel through air and soil (GEO).
BIOGEOCHEMICAL CYCLESMatter can
cycle through the biosphere because elements are not “used up,” but are only transformed.
Carbon CycleOne of the most
important to humans because carbon is:one of the primary elements forming human tissues
necessary to plants, the basis of human food
Carbon CycleImportant to the
climate system :carbon dioxide (CO2 ) and methane (CH4 ) are greenhouse gases which help set global temperatures
Nitrogen CycleImportant cycle because:
nitrogen is a necessary nutrientnitrogen is part of acid rain
Phosphorus CycleImportant because:
Cannot be transferred from the ocean to plants very effectively.
Incorporated into many molecules essential for life such as ATP (Energy source) and backbone of DNA and RNA
CYCLES – NITROGEN, CARBON, AND PHOSPHOROUS
AIR
SOIL
LIFE
SUMMARY – VENN DIAGRAM
Carbon
Phosphorus
C & N
C, N, & P
C & P N & P
Nitrogen