Factors impacting population change

Factors impacting population change

Learning objectives

• Students will differentiate between biotic and abiotic factors

• Students will learn about population distribution

• Students will learn about the factors that impact population

Terms

• Density independent factors- things that happens regardless of population size- a. weather, b. natural disasters- tornadoes, hurricanes, fires. c. Human activities- hunting, deforestation

• Density dependent factors- This are factors that impact a population because of its size. Ex. Disease, competition, parasitism, predation

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Abiotic and Biotic factors

• Abiotic-Non living ex. sunlight, water, sand, rocks, air

• Biotic- Living things. Ex. Plants, you, insects, lizards, coyotes, bacteria etcetera

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Density independent

• Tornadoes

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Density independent

Fires

Density independent

Hurricane

Density independent factprs

This are natural distasters, human activities and weathers

Density dependent

Parasitism

Competition

Fighting for food and mates

Disease- Plant

Multiple Choice

In many desert ecosystems, days are hot and nights are cold. Water is scarce, so animals seek water wherever possible. The spines of a cactus are actually leaves adapted to conserve water. The cactus plants have also adapted to live in thin, sandy soil. Which of the following is a biotic component of a desert ecosystem?

• the thin, sandy soil

• the wide temperature range

• the scarcity of water

• the spiny cactus leaves

Multiple Choice

what does abiotic mean?

• living things and their products

• non-living

Multiple Choice

Any factor in the environment that does not depend on the number of members in a population per unit area

• biotic factors

• density-independent factor

• density-dependent factor

• predation

Multiple Choice

what is the type of population dispersion (distribution) is shown on the diagram?

• Clumped

• Random

• Uniform

Review

• We covered biotic and abiotic factors, population distribution and looked at different factors that affect population distribution

• Complete 2.2 & 2.3 Learn on canvas due Friday 9/25/2020