OCR F215 Module 3 - Ecosystems

Biotic and abiotic factors
· The components of an ecosystem can be
divided into biotic and abiotic factors
· Biotic involve other living organisms
· They include: feeding herbivores on plants,
predation, parasitism, mutualism and
competition…read more

Biotic factors affecting zebras…read more

Abiotic factors affecting organisms
· Involve non-living components ­ temperature, light intensity, oxygen and carbon
dioxide concentrations, water supply, pH, humidity, wind speed..…read more

Biotic or not?…read more

Biotic or not?…read more

Ecosystems
· Not always easy to define
· Dynamic
· Matter is recycled ­ nitrogen/carbon cycle
· Energy is NOT recycled but FLOWS through
ecosystems
· Energy in = energy out? Efficiency…read more