Topic 6 Ecology. The study of interactions between organisms and their environments. I. Parts of an Ecosystem. A. Biotic factors Biotic factors – all living organisms in a biosphere Ex. Plants, bacteria, animals, us… Biosphere – life-supporting layer of Earth
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The study of interactions between organisms and their environments.
A. Biotic factors
Ex. Plants, bacteria, animals, us…
includes the Earth’s surface, water, and the atmosphere
Soil pH – too acidic/basic
Sunlight – in a forest
Space – in a nestII. Population LimitsA. Factors that limit population growth are called limiting factors
A. Organisms have certain “roles” in an ecosystem
Ex. Barnacles on whales
Ex. Bees and flowers, birds and rhinos
Ex. Tapeworms, lice, ticks, heartworms
Show distribution of biomass in an ecosystem
Some trophic pyramids include energy distribution as well…