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Monday Oct 13th-Week 10 Science of Life TOPIC: Population Dynamics OBJ : 3-5 DO NOW: What advantage do smaller fish gain by forming clumped groups, or schools? EXT: Oh DEER! DUE DATE: Oct 14th DW: 4.1 Application Notes -----------------------------------------------------------------------------------------------------------------Check weekend work -Go Over 4.1 Application notes ABSENT AGENDA HANDOUTS to PICK-UP: TURN IN to ABS box: SEMINAR 2: BEFORE/AFTER SCHOOL: DW-4.2 Book Pages/notes/vocab EXIT: Fill in your level of understanding AND provide a summary of what you learned in class today. MONDAY MONDAY: ___10__/__13___ OBJECTIVE…#_3-5_____ TOPIC: Population Dynamics Daily Work Grade- 4.2 Book Pages/4.2 Vocab DW GRADE: 2 1 0 DO NOW Q:What advantage do smaller fish gain by forming clumped groups, or schools? A: Schooling behavior confuses predators and provides additional safety for individuals within the center of the school. UNIT OBJECTIVES 3---EXPLAIN the differences between population size, density, and dispersion. 4---SPECULATE how the rate of change in populations is determined by the combined effects of birth, death, emigration, and immigration. 5---COMPARE & CONTRAST both exponential & logistical models of population growth. Vocabulary population density dispersion density-independent factor density-dependent factor population growth rate emigration immigration carrying capacity k-strategist r-strategist These should be done by test day! GROUP WORK: GUIDED NOTES -As a GROUP complete the guided note using your knowledge from the reading. 4.1 POPULATION DYNAMICS WHAT YOU WILL LEARN -concepts of carrying capacity & limiting factors -ways in which populations are distributed MAIN IDEA: MAIN IDEA populations of species are described by: -density -spatial distribution -range -growth rate REVIEW REVIEWVOCABULARY VOCABULARY population-group of SAME species/SAME place/SAME time POPULATION CHARACTERISTICS POPULATION CHARACTERISTICS -COMPARE the terms by defining & giving examples population density# of individuals per area Habitat area= 4km2 31 individuals [bison] DENSITY = 7.75 indv per area km2 spatial distribution (dispersion)spacing of organisms population range-area where an organism lives & reproduces 2 different types -limited to small or large areas -affected by abiotic & biotic factors Clumped, random, uniform POPULATION FACTOR POPULATIONLIMITING CHARACTERISTICS IDENTIFY each pattern of dispersion represented NOTE characteristics of each random -unpredictable spacing -seeds blown in wind uniform -compete for resources -social interactions clumped -distribution of nutrients -social -mating POPULATION FACTOR POPULATIONLIMITING LIMITING FACTOR -COMPARE the terms by defining & giving examples carrying capacity-max # of individuals an environment can support for LIMITED by the energy, water, nutrients available long term limiting factorEX- food supply -restricts the # of organisms in an area density-independent factor- ABIOTIC— does NOT depend on # of ind in population -extreme weather, pollution density-dependent factor- BIOTIC— DOES depend on # of ind in population -predation, disease, competition POPULATION FACTOR POPULATIONLIMITING LIMITING FACTOR -CLASSIFY each limiting factor FACTOR biotic or abiotic Lava flow Stand-UP DENSITYINDEPENDENT ABIOTIC Extremely cold winter X Toxic chemical spill into a stream X Fungus that attacks elm trees BIOTIC X X Spread of disease Flooding due to hurricane DENSITYDEPENDENT X Change in number of predators Intense competition for food source Sit-DOWN X X X POPULATION LIMITING FACTOR -COMPARE factors in a population’s growth rate Population growth rate-rate in which individuals are added or removed from a population emigrationimmigration-individuals leave-EXIT (-) -individuals move INTO (+) mortalityIndividuals die (-) natalityIndividuals born (+) Think and Answer: 1 PREDICT how the cycle might change for the moose population if the wolves were removed from Isle Royale. POPULATION FACTOR POPULATIONLIMITING LIMITING FACTORS DRAW graphs: Exponential Population Growth Logistic Population Growth exponential growth carrying capacity lag phase population growth w/o limiting factors— continues to grow population growth w/limiting factors—stops growing when reaches carrying capacity POPULATION LIMITING FACTOR carrying capacity EXPONENTIAL GROWTH: • Starts with lag phase • NO limiting factors • NO carrying capacity • J-curve LOGISTIC GROWTH • Starts with lag phase • Limiting factors • Carrying capacity • S-curve POPULATIONLIMITING LIMITING FACTOR POPULATION FACTOR SUMMARIZE the reproductive strategies of r-strategists & kstrategists for ensuring continuation of their species. CHARACTERISTIC size # of births per cycle R-strategist SMALL many offspring Life span SHORT life span amount of energy put into raising their young little amount of energy type of environment abundant resources K-strategist LARGE 1 or few offspring LONG life span lot of energy raising young equilibrium at carrying capacity POPULATION FACTOR POPULATIONLIMITING LIMITING FACTORS IDENTIFY the following organisms reproductive patterns R K R R-strategist / K-strategist R CONCEPT MAP: POPULATION LIMITING FACTOR growth rate dispersion density limiting factors uniform clumped densityindependent densitydependent ABIOTIC drought BIOTIC predation competition Review Questions • What are three characteristics used to describe populations? -Spatial distribution -population density -growth rate Review Questions • What is the difference between uniform and random distribution? -Uniform distribution appears equally spaced, and random distributions can have organisms closely spaced in some areas and more distantly spaced in others Review Questions • How would you classify a biotic factor, such as food availability that limits its population size? -it would be a density-dependent factor Review Questions • How would you distinguish between the shape of an exponential growth curve and a logistic growth curve? -Exponential growth curves are J-shaped and logistic growth curves are S-shaped Review Questions • Can you describe what is happening to a population in the exponential phase of growth? -It is growing rapidly EXIT FILL-IN: level of understanding of today’s objective EXIT: Provide a summary of what you learned today. (17 word minimum)