Get to work… Get your notebook. Open to pages 60-61. Continue working on “What is the definition of Population Distribution” worksheet. (Textbook page 107)

Reminders … Cell phones Backpacks, food/drink There are zeroes in the gradebook. Office hours! Graphing worksheets Summative tomorrow! Lost and found: men’s bracelet, small key Fire drill Friday

Today … We will take notes on population distribution. We will organize the information into an informational chart. We will do hands-on practice of density and distribution. Time permitting, we’ll start notes on age distribution graphs.

Worksheet … What is the definition of Population Distribution: This describes how organisms are arranged within their area.

Worksheet … no particular pattern resources other organisms The first type of population distribution is: Random Distribution    Definition: Individual organisms are arranged within a space in ____________________________. Why does this type of distribution happen? It can occur when the _________________ an organism needs are found throughout an area and ___________________ do not strongly influence where members of a population settle. no particular pattern resources other organisms

Random Dispersion a) In random dispersion, the location of one individual is independent of the location of the other individuals. b) Random dispersal may result from seed dispersal: by the wind or animals. c) A forest or a field of wildflowers results from the random dispersal of seeds.

Worksheet … evenly spaced territories compete The second type of population distribution is: Uniform Distribution    Definition: This is when individual organisms are ________________ throughout an area. Why does this type of distribution happen? This can occur when individuals hold _____________ or otherwise ____________ for space. evenly spaced territories compete

Uniform Dispersion a) In a uniform dispersion, individuals are: These penguins exhibit uniformdispersion because of aggressive interactions that occur between neighbors. a) In a uniform dispersion, individuals are: separated by a fairly even distance. Uniform distributions are usually the result of _____________________, but the interaction results in the individuals trying to: get as far away from each other as possible. social interactions

Worksheet … resources survive most common desert animals The third type of population distribution is: Clumped Distribution    Definition: Individual organisms arrange themselves according to the availability of the ____________ they need to ______________.   Why does this type of distribution happen? This is the ________________ pattern in nature. For example, __________________ may live in patches around isolated __________________. resources survive most common desert animals sources of water

Clumped Dispersion a) In clumped dispersion the individuals are clustered together. Clumped distributions often occur when: resources such as food, water, or living spaces are clumped together. Clumped distributions may also occur because a species has: a certain social behavior, such as herding animals, flocks of birds, schools of fish or hives of bees.

Types of Population Distribution Individuals are evenly spaced in an area. Highlight Individuals are arranged in no particular pattern. Uniform Highlight Types of Population Distribution Clumped Random Individuals are arranged around sources of resources. Highlight

Notebook … Type Picture Example Reason Random X X XX XX X XX X XX X Uniform Penguins on their nests. Gathered around available resources. Clumped

Notebook … Type Picture Example Reason Random X X XX XX X XX X XX X There are plenty of resources everywhere. Flower seeds spread out in a field Stay away from each other so there is no fighting. Uniform X X X Penguins on their nests. Herd of elephants. Most common Gathered around available resources. Clumped XXXX XXX

Models … Model a high population density. Model the population distribution that is most commonly found in nature. Model the population distribution that happens when resources are found everywhere. Model the population distribution that happens when organisms keep their own territories because they might fight one another. Model the population density that makes diseases easy to spread.

Models … Model the population distribution that happens when water is found only in certain areas. Model the population density that makes it easy to find a mate. Model the population distribution that happens when a plant’s seeds spread over a field. Model the population distribution that happens when organisms don’t influence each other in any way. Model the population density that results in a lot of competition for resources.

Vocabulary Word ISN Page Vocabulary List Vocabulary Word ISN Page Abiotic 59 Biotic 59 Community 59 Ecosystem 59 Habitat 54 Individual 59 Population 59 Species 55 Resources 54 Population distribution 61 Population density 61 Sex ratio Biotic Potential Carrying Capacity Limiting Factors Emigration Immigration Exponential Growth Fluctuating Logistic Growth Migration Population Growth Rise-and-Crash Survivorship Curve Biotechnology Endangered Species Ethics Invasive Native Species Nonnative Species Let’s highlight the vocabulary on their pages … 53

How do changes in population size relate to environmental conditions? Aha Connections Aha Connections ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Aha 1: I can differentiate between the levels of ecological organization (pages 58 and 59). Aha 3: I can explain how changes in population size can indicate the health of a population (page 61). Aha 2: I can describe the resources, biotic and abiotic factors, that organisms require to survive in a habitat (page 54). Aha 4: I can differentiate between the different population distributions and give examples of each (page 61). Aha 5: I can describe how population density is influenced by the availability of local resources (page 61). How do changes in population size relate to environmental conditions? 56 57