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2/11 Daily Catalyst Pg. 18 Population Ecology 1. Compare and contrast the savanna and grassland biome. 2. Give an example of a population. 3. Describe the tundra biome. 2/11 Class Business Pg. 18 Population Ecology Quiz #5 on Friday Ecology Research paper topic Sign up with Mrs. Ireland Library work day on Friday Rubric on Friday Mardi Gras check in Test corrections due Monday after Mardi Gras break I will post the key on Thursday-Friday 2/11 Agenda Pg. 18 Population Ecology Daily Catalyst Class Business Biome review Population ecology Practice questions Exit Ticket #6 Population Ecology Pg. 17 HW Why isn’t Earth’s climate uniform? To answer this, include the factors that produce differences in climates. Objective We will be able to describe interactions among living systems and their environment, which result in the movement of populations. Populations video clip In your notes, write down : • 2 things populations work towards • 3 reasons why populations increase/decrease • http://www.ted.com/talks/hans_rosling_on_global_p opulation_growth Properties of population Key Point #1: The properties of populations: 1. Population size 2. Density 3. Dispersion 4. Age Diagrams How many jelly beans are in the jar?! Population Size Key Point #2: Population Size The number of organisms in a population “n” For example: The population size of Environmental Science is n=35 At times, we rely on estimation Properties of population 1. Population size 2. Density 3. Dispersion 4. Age Diagrams Density Key Point #3: Density The number of individual organisms per unit area For example: There are 55 spruce trees per square mile Different species, of course, exist at different densities in their environments, and the same species may be able to achieve one density in one environment and another in a different environment Do species space themselves out in an even manner?! NO!! But once again we can use estimation! Properties of population 1. Population size 2. Density 3. Dispersion 4. Age Diagrams Dispersion Inquiry Population Dispersion: Key Point #4: Dispersion The way organisms are spaced in an area. • Clumped • Uniform • Random Dispersion Inquiry Why do organism disperse in this manner? Clumped • Most common • Unequal distribution of resources • Mating and social • Predation • Hunting Random • Rare • Spaced in an unpredictable way • Even environment conditions • Difficult to mate UNIFORM • • • • Spaced in a predictable way Result of territorial behavior Competition for resources Even environment conditions Dispersion Inquiry Properties of population 1. Population size 2. Density 3. Dispersion 4. Age Diagrams Age Diagrams “In the second or two it took to read this sentence, 21 babies were born somewhere in the world and nine people died. The statistics may have changed a bit by the time you read this, but births will still far outnumber death. An imbalance between births and deaths is the cause for population growth (or decline).” How do we explain human population growth? Key Point #5: Growth models Exponential • Nickname: J-Curve • Unregulated growth and unlimited resources • Sustainable? Logistical • Nickname: S-Curve • Effected by limited resources • Population Stabilize Age Diagrams Key Point #6: Definition: shows the number of organisms at each particular age group. For example: there are 30 Environmental students in the 15-18 age range. What influences age structures? Age structures also reveal social and economic trends Stop and JOt How large of a population of humans can Earth hold? Do we have resources to sustain 8 or 9 trillion people? Populations Recap What are the four properties of populations? Population size, density, dispersion, and age diagrams Define density: the size of the population per unit area What type of growth does a population with unlimited resources exhibit? Exponential growth Dispersion Notebook questions Pg.18 1. What is the most common type of dispersion? a. List reasons why this pattern is most common. b. Give 3 examples of this pattern in a real ecosystem 2. What is the likely dispersion pattern of fish that swim in schools, seabird nesting on a small field, and thistles growing in a fairly uniform field? 3. What affects the size of populations? Think broadly and what affects the human and non-human population? 4. What would likely be the cause of bushes of one species growing in one are in a uniform spacing pattern? a. random distribution of seeds b. interactions among individuals in the population c. chance d. the varied nutrient supplies in that area e. variation in sunlight 5. Define dispersion: Name: _________ period: 2 date: 2/11 Score: _______/4 QP: _____ Exit Ticket #6 Population Ecology 1. What would likely be the cause of bushes of one species growing in one area in a uniform spacing pattern? a. random distribution of seeds b. interactions among individuals in the population c. chance d. even nutrient supplies in that area 2. What is the nickname for exponential curves? 3. What type of dispersion patterns do lions show? Why? 4. What is the symbol we use to represent population size? 1/28 Daily Catalyst PAGE 9 1. In the temperate grasslands, Ecologist estimate there are 789 bison, 23 wild horses, 7 million sunflowers. Determine the population size of the bison, horses, and sunflowers. 2.How are population size and population density different from one another? 3.Finish graphing your data from Friday’s lab. If you were absent, this lab needs to be made up. 1/28 Daily Catalyst 1. In the temperate grasslands, Ecologist estimate there are 789 bison, 23 wild horses, 7 million sunflowers. Determine the population size of the bison, horses, and sunflowers. N= 789 bison, N=23 wild horses, and N=7 million sunflowers 2. How are population size and population density different from one another? Pop. size is the number of individuals in a certain pop. and density is the number of individuals per unit area. 3. Finish graphing your data from Friday’s lab. If you were absent, this lab needs to be made up. 1/28 Class Business Extra Credit due today for Kevin and Akeira Ecology project Quiz #3 on Friday Population Lab make-up tomorrow during lunch Honors topics due tomorrow (background research is due Friday) 1/28 Agenda Daily Catalyst Class Business Population Notes 1/28 Objective Daily Objective We will be able to describe interactions among living systems and their environment, which result in the movement of populations. Page 9: Properties of populations Brief Recap Population Size The number (n) of organisms in a population Population Density The number of organisms per unit area Properties of population 1. Population size 2. Density 3. Dispersion 4. Age Diagrams Dispersion Inquiry Population Dispersion: Definition: the way organisms are spaced in an area. • Clumped • Uniform • Random Dispersion Inquiry Why do organism disperse in this Random manner? Clumped UNIFORM • Most common • Unequal distribution of resources • Mating and social behavior • Predation and hunting efficiency • Very rare • Spaced in an unpredictable way • Even environment conditions • Difficult to mate • Interactions between organisms • Result of territorial behavior • Competition for resources • Environment/ resources are also even Properties of population 1. Population size 2. Density 3. Dispersion 4. Age Diagrams On Friday, you completed a lab on lily pad growth in a pond. The lab asked you to double the number of lily pads every day until half the pond was filled. Then you estimated how many days it would take for the entire pond to be filled. Most of you would take 5-6 days till fill the entire pond with lily pads. At the beginning of the lab, it seemed like it would take a lot more then 7 days to fill the pond, but this was not the case because the lily pad population grows in a specific way. Read the first paragraph on page 728 “Population size fluctuates as new individuals…” Growth models Exponential • Nickname: J-Curve • Unregulated growth and unlimited resources • Sustainable? Logistical • Nickname: S-Curve • Effected by limited resources • Population Stabilize What type of graph did the lily pad population make? What factors influence the growth of the lily pads? Age Diagrams “In the second or two it took to read this sentence, 21 babies were born somewhere in the world and nine people died. The statistics may have changed a bit by the time you read this, but births will still far outnumber death. An imbalance between births and deaths is the cause for population growth (or decline).” How do we explain human population growth? Age Diagrams Definition: shows the distribution of various age groups of a region and to determine the overall age distribution of a population. What influences age structures? Age structures also reveal social and economic trends How large a population of humans can Earth hold? Do we have resources to sustain 8 or 9 million people? Test Corrections Due: MONDAY Test corrections are optional and a chance to bring up your test grades. Since learning from our mistakes is essential for the learning process, I will allow you to correct the missed questions from all test. 1. Why you missed the question(didn’t study, misread the question) 2. What is the right answer (a, b, c, or d) 3. Why is that the correct answer (use notes, books, etc. ) You can earn up to half credit back on each problem you correct. Movie Time During movies we are: Silent Respectful Mature If you do not want to watch the movie, put your head down or work on other work. This is not the time for talking and texting. Ecology Exit Ticket #3 1. What two factors make up an ecosystem? 2. Give an example of a community. 3. In what biome would buffalo and prairie dogs live? This biome is flat with cold winters and hot summers. 4. True/false: An organisms niche is not specific to that organism Ecology Exit Ticket #3 1. What two factors make up an ecosystem? Abiotic and biotic factors 2. Give an example of a community. Elephants, Lions, and tall grass Owl, spruce trees, and mice 3. In what biome would buffalo and prairie dogs live? This biome is flat with cold winters and hot summers. Temperate grassland 4. True/false: An organisms niche is not specific to that organism False