KEY CONCEPT Every ecosystem includes both living and nonliving factors.
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Transcript of KEY CONCEPT Every ecosystem includes both living and nonliving factors.
13.2 Biotic and Abiotic Factors
KEY CONCEPT Every ecosystem includes both living and nonliving factors.
13.2 Biotic and Abiotic Factors
An ecosystem includes both biotic and abiotic factors.
• Biotic factors are living things.– plants– animals– fungi– bacteria
plants
13.2 Biotic and Abiotic Factors
• Abiotic factors are nonliving things. – moisture– temperature– wind– sunlight – soil
13.2 Biotic and Abiotic Factors
Changing one factor in an ecosystem can affect many other factors.
• Biodiversity is the assortment, or variety, of living things in an ecosystem.
13.2 Biotic and Abiotic Factors
Tropical rainforests have the highest level of biodiversity.
13.2 Biotic and Abiotic Factors
• A keystone species is an organism that links many other species together. This species that has an unusually large effect on its ecosystem
keystone
13.2 Biotic and Abiotic Factors
Salmon are keystone species in the temperate rainforest.
•Critical fall food source for the grizzly bear, wolves, eagles and otters.•Act as fertilizer for the trees.
6H2O + 6CO2 ----------> C6H12O6+ 6O2
6CO2 + 6H2O + 3H2S ----------> C6H12O6+ 3H2SO4
Sulfide SulfuricAcid
13.2 Life in an ecosystem requires energy
light energy