1. POPULATION DYNAMICS

2. POPULATION – POPULATION  DEF?? – POPULATION ECOLOGY CONCERNED WITH THE CHANGES IN POPULATION SIZE AND THE FACTORS THAT REGULATE POPULATIONS OVER TIME

3. POPULATION DYNAMICS POPULATION ECOLOGY 

4. POPULATION DYNAMICS DENSITY AND DISPERSION PATTERNS ARE IMPORTANT POPULATION VARIABLES – POPULATION DENSITY THE NUMBER OF INDIVIDUALS OF A SPECIES PER UNIT AREA OR VOLUME IT’S EXTREMELY DIFFICULT TO COUNT ALL THE INDIVIDUALS IN ANY POPULATION, SO SCIENTISTS USE VARIOUS SAMPLING TECHNIQUES – TAG & RECAPTURE METHOD

5. POPULATION DYNAMICS DENSITY AND DISPERSION PATTERNS ARE IMPORTANT POPULATION VARIABLES – DISPERSION PATTERN REFERS TO THE WAY INDIVIDUALS ARE SPACED WITHIN THEIR AREA 3 MAJOR PATTERNS – CLUMPED – UNIFORM – RANDOM

6. POPULATION DYNAMICS

8. IDEALIZED MODELS HELP US UNDERSTAND POPULATION GROWTH – EXPONENTIAL GROWTH MODEL RATE OF EXPANSION OF A POPULATION UNDER IDEAL CONDITIONS; UNREGULATED GROWTH

9. POPULATION DYNAMICS IDEALIZED MODELS HELP US UNDERSTAND POPULATION GROWTH – POPULATION -LIMITING FACTORS AND THE LOGISTIC GROWTH MODEL

10. POPULATION DYNAMICS IDEALIZED MODELS HELP US UNDERSTAND POPULATION GROWTH – IDEALIZED MODELS DON’T EXIST IN NATURE!! – POPULATION-LIMITING FACTORS ENVIRONMENTAL FACTORS THAT RESTRICT POPULATION GROWTH – LOGISTIC GROWTH MODEL IDEALIZED POPULATION GROWTH THAT IS SLOWED BY LIMITING FACTORS AS THE POPULATION SIZE INCREASES

11. POPULATION DYNAMICS LOGISTIC GROWTH MODEL – CARRYING CAPACITY  THE MAXIMUM POPULATION SIZE THAT AN ENVIRONMENT CAN SUPPORT AT A PARTICULAR TIME, WITH NO DEGRADATION TO THE HABITAT

12. POPULATION DYNAMICS MULTIPLE FACTORS MAY ACT AS LIMITING AGENTS – COMPETITION FOR LIMITED RESOURCES FOOD, TERRITORY, MATES, ETC. – INCREASED DISEASE TRANSMISSION – PHYSIOLOGICAL FACTORS ARE IMPACTED BY DENSE POPULATIONS – ABIOTIC FACTORS MAY IMPACT POPULATION SIZE *SOME POPULATIONS HAVE “BOOM-AND-BUST” CYCLES* – THIS IS NOT FULLY UNDERSTOOD

13. POPULATION DYNAMICS WHAT DOES THE LOGISTIC GROWTH MODEL REALLY LOOK LIKE IN A STABLE ENVIRONMENT??

14. POPULATION DYNAMICS HUMAN POPULATION GROWTH

15. POPULATION DYNAMICS LIFE TABLES TRACK MORTALITY AND SURVIVORSHIP IN POPULATIONS – SURVIVORSHIP CURVES PLOT THE PROPORTION OF INDIVIDUALS ALIVE AT EACH AGE

16. POPULATION DYNAMICS BIRTH AND DEATH RATES AND AGE STRUCTURE AFFECT POPULATION GROWTH – ZERO POPULATION GROWTH (ZPG) IS WHEN BIRTH RATES EQUAL DEATH RATES

17. POPULATION DYNAMICS BIRTH AND DEATH RATES AND AGE STRUCTURE AFFECT POPULATION GROWTH – AGE STRUCTURE THE PROPORTION OF INDIVIDUALS IN DIFFERENT AGE- GROUPS

18. POPULATION DYNAMICS TWO IMPORTANT PRACTICAL USES OF POPULATION DYNAMICS INCLUDE – RENEWABLE RESOURCE MANAGEMENT HARVESTING CROPS WITHOUT DAMAGING THE RESOURCE – MAXIMUM SUSTAINABLE YIELD HARVESTING AT A LEVEL THAT PRODUCES A CONSISTENT YIELD WITHOUT DAMAGING THE POPULATION

19. POPULATION DYNAMICS THAT’S POPULATION ECOLOGY…BUT HOW DO ALL OF THE DIFFERENT POPULATIONS GET ALONG?? THAT’S COMMUNITY-LEVEL ECOLOGY, AND THAT’S NEXT!!!