how ecosystems work
Post on 17-Feb-2016
39 Views
Preview:
DESCRIPTION
TRANSCRIPT
HOW ECOSYSTEMS WORK
HOW ECOSYSTEMS WORKLife on Earth Depends on the Sun
6 CO2 + 6 H2O C6H12O6 + 6 O2PRODUCERSOrganisms that can use sunlight directly to make their own energyAka AUTOTROPH
Trap solar energy and perform photosynthesis
Vital to ecosystems
Ex: grasses, algae, cactuses, treesCONSUMERSRely on producers directly or indirectly for their energy
Aka HETEROTROPHS
Primary Consumers = HerbivoresSecondary Consumers = Carnivores or OmnivoresDECOMPOSERSBreaks down dead organisms and waste materialReturns nutrients to soil, water and air
Ex : fungi and bacteriaENERGY TRANSFEREach time one organism eats another, a transfer of energy occurs
Study energy transfers by mapping out food chains and food webs
SPECIAL TERMSPredatorPreyScavengerParasiteHost
FOOD WEBPYRAMIDS
1- NUMBERS
2- BIOMASS
3- ENERGYPyramid of Numbers
Pyramid of Biomass
Pyramid of Energy
Calculate the Percentage loss of energy at each levelCayuga lake, NY- lake ecosystem
Humans 1.2 caloriesTrout 6 caloriesSmelt 30 caloriesSmall aquatic 150 calories animals5. Algae 1000 caloriesCalculate the Percentage loss of energy at each levelCayuga lake, NY- lake ecosystem
Humans 1.2 calories 80 %Trout 6 calories 80 %Smelt 30 calories 80 %Small aquatic 150 calories 85 % animals5. Algae 1000 calories
top related