Ecology Review

HabitatResidence (Where they live)

Ex. Bird-Nest in tree

NicheOccupation (What they do)

Ex. Bird-Build nests, gather food for

chicks, protect eggs, etc.

Biotic or Abiotic?Plants growing in a field.

-BioticClimate of an ecosystem.

-AbioticDecomposing plant matter.

-BioticRocks in the soil.

-Abiotic

A __________causes a population to decrease in size.

-Limiting Factors-examples:

-climate-water-habitat-predation-pollution

Population• A group of organisms of the

same species

Biotic OnlyBiotic only? Or Both Biotic and

AbioticPopulations

• A group of organisms of the same species

Community• Populations living together in

same area

Biotic OnlyBiotic only? Or Both Biotic and

AbioticCommunities

• Populations living together in same area

Ecosystem• Communities, plus the abiotic

factors, living together in same area

Biotic and Abiotic!Biotic only? Or Both Biotic and

AbioticEcosystem

Communities, plus the abiotic factors, living together in same

area

Biosphere• All of the ecosystems on the

planet combined

Energy Pyramid

copyright cmassengale 17

If the producer in this pyramid yeilds 2100 kcals of energy, then the 2nd level consumer will get about…… 21 kcals!

CompetitionOccurs when 2 organisms try to use the same resource at the same place at the same time.

Ex. cheetahs and lions, since both species feed on the same prey

Carrying Capacitythe maximum population size of the species that the environment can sustain.

Biological Magnification• Toxins (increase/decrease) as they

move through trophic levels.

Increase!