Chapter 15: Interactions of Living Things Note-Taking Worksheet 1 Section 1
Section 1: The Environment Ecology is the study of all interactions among organisms and their environment.
Parts of the Environment Abiotic Factors The non-living parts of the environment Water Air Soil Sunlight Temperature
Parts of the Environment Biotic Factors The living or once living parts of the environment Animals Plants Dead Plants & Animals
***Quiz Time Questions*** • The study of all interactions among organisms and their environment is known as __________. • Tell whether the following are biotic or abiotic: Sunlight ________ Mammels ________ Water _________ Soil _________ Temperature ________ Bacteria _________ Fungi _________ Air __________ Plants __________ Climate ___________
Levels of Organization The organization of biotic and abiotic factors is as follows: A. An organism is one individual from a population. B. Population is all the individuals of one species living in the same area at the same time.
C. Community is the populations of different species that interact in some way. D. An ecosystem is all of the communities in an area and the abiotic factors that affect them.
E. A biome is a large region with plants and animals that are adapted to that region. F. The biosphere is the level of biological organization that is made up of all the ecosystems on Earth.
***Quiz Time Questions*** • A prairie dog, a hawk, and a badger are all members of the same _________. • All the rainbow trout in a stream is an example of a __________. • All the pets in your neighborhood is an example of an __________. • All the ants in an anthill is an example of a __________. • Just one individual from a population is an ___________.
An ecosystem is made up of a biotic community and the abiotic factors. Or, groups of plants and animals in a particular abiotic environment.
Examples of an Ecosystem: pond, stream, forest, meadow, coral reef, desert, mountain, rain forest.
Section 2: Interactions Among Living Organisms The number of individuals in a population is the population’s size.
The number of individuals in a particular area is called population density.
Population spacing is how organisms are arranged in a given area. This arrangement can be even, random, or clumped.
A limiting factor is any biotic or abiotic factor that restricts the size of a population. Examples include: drought (weather conditions), food supply, diseases
The largest population size that can be supported and maintained by its environment for a long period of time is the environment’s carrying capacity.
***Quiz Time Questions*** • The number of individuals in a population is the population’s ______. • Explain how food supply could be a limiting factor to a population. • Classifying organisms arrangements as either even, random or clumped is known as population ________.