SW discuss with their groups how estimating a population could be used in a real world situation Population Ecology Measuring a population Growth Curves Biotic Potential vs Environmental Resistance ID: 1025910
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1. Population Ecology
2. SWBAT: Apply measuring a population to real world situations.SW: discuss with their groups how estimating a population could be used in a real world situation.
3. Population EcologyMeasuring a populationGrowth CurvesBiotic Potential vs. Environmental ResistanceReproductive StrategiesLimits
4. Measuring a populationFirst things first: Population vs. CommunityWays a population can be measuredSize: helps monitor population declinesDensity: helps identify if species are rare or abundant.Distribution: helps regulate food supply and set up management guidelines.Sex ratio: helps estimate the number of offspring in the next generationAge structure: Help predict how quickly the population will growclumpeduniformedRandomed
5. No look under your desk and draw the gum populations that you see on page in your spiral.Now label the populations clumped, scattered or uniformed.
6. Measuring a Population con’tSome tools:Estimating a population p= (N1 x N2)/RN1= Size of sample 1 (all marked)N2 second sampleP = populationR= recaptured or marked in second sampleDeaths and Emigration = decreaseBirths and immigration = growthPopulation growth = (births + Immigration)- (deaths + emigration)0= equilibrium (no change)Population rate = growth/timePopulation growth = (births + Immigration)- (deaths + emigration)Population rate = growth/timeEstimating a population p= (N1 x N2)/RN1= Size of sample 1 (all marked)N2 second sampleP = populationR= recaptured or marked in second sample
7. Make this chart on page 17R (number marked)N1 (number originally marked)N2 (number of second sample)P (population estimate)10101010101010101010Average P =
8. SWBAT: Apply measuring a population to real world situations.SW: discuss with their groups how estimating a population could be used in a real world situation.
9. How could this be used in a real world setting?What are some ways that this could be made more exact?
10. SWBAT: Apply measuring a population to real world situations.SW: discuss with their groups how estimating a population could be used in a real world situation.
11. APESSWBAT: identify different ways of measuring populations. (growth curves, resistance, biotic potential, reproductive strategies and limits)SW: discuss ways to measure populations by working in pairs and participating in a rally coach.
12. Growth curvesExponential LogisticJ-shapedS-shaped
13. Biotic Potential vs. ResistancePotential = what things could be under ideal conditionsResistance= combination of all biotic and abiotic factors that may limit a population’s increase.Moisture, temperature, salinity (aka limiting factors)Ex:Loss of habitat may cause migration or death
14. Reproductive StrategiesR-strategistsK strategists
15. LimitsDensity IndependentDensity DependentCritical number: minimum population base (how low can we go?)Threatened vs. Endangered
16. https://www.youtube.com/watch?v=RBOsqmBQBQk
17. APESSWBAT: identify different ways of measuring populations. (growth curves, resistance, biotic potential, reproductive strategies and limits)SW: discuss ways to measure populations by working in pairs and participating in a rally coach.