Ecology Populations Review

• Define ecology

• The study of the interaction of living organisms with each other in their physical environment.

• What is a group of species or organisms called?

• A population

• What are a group of different populations called?

• A community

• What are a group of different communities called?

• An ecosystem or biome

• What are a group of ecosystems or biomes called?

• The biosphere

• List five abiotic and biotic factors of a community.

• Biotic: Abiotic:• Plants Soil• Animals Water• Bacteria Temperature• Decomposers (fungi) Energy

• Algae

• What is a habitat?

• The place where a organism lives

• What is a niche?

• Where, what and when an organism lives. It is it’s role in the habitat.

• The organisms that make nutrients are called________________.

• Producers (autotrophs)

• What is biomass?

• The total of all the weight of all the organisms

• Name an herbivore.

• A cow

• Name a carnivore

• A lion

• What is an omnivore?

• An organism that eats both plants and other animals.

• How is nitrogen released back into the environment after an organism dies?

• It has to go through decomposition to be released

• What is a food web?

• A series of interacting organisms that feed off of each other.

• What are the levels of the food chain called?

• Trophic levels

• Which level of the food chain has the smallest biomass?

• The top predator

• Where on the food chain will the producers be found?

• The bottom

• What percent of energy is lost at each trophic level of a food chain?

• 10%

• Water, carbon dioxide/oxygen, nitrogen are all examples of ________________ cycles

• biogeochemical

• Which cycle contains precipitation, transpiration, and evaporation

• The water cycle

• Why do humans and all organisms need nitrogen in their diets?

• To make proteins

• What is the source of coal, oil and natural gas?

• From once living things:• Coal: plants• Oil: decomposed dinosaurs, marine animals• Natural gas: underground microorganisms

• What negative impact do humans have on the carbon dioxide/oxygen cycle?

• Clear cutting• Burning

• What has helped the human population go into an exponential growth?

• Better health care• Better nutrition• Better living conditions

• Explain what the carrying capacity of a population is.

• Births equal deaths, the population stabilizes

• What was the impact of the agricultural revolution on population?

• It increased dramatically

What type of graph is this?

• exponential

• What is the correlation between this type of graph and limiting factors?

• There aren’t many limiting factors preventing growth.

Which year has the greatest human population growth?