1. What affects populations?

2. biotic & abiotic factors

3. Populations are AFFECTED BY BOTH!
LIVING--biotic
NON-LIVING--abiotic
AND

4. BIOTIC LIMITING FACTORS
can you imagine both biotic & abiotic factors that could reduce a population?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS

5. Make a quick t-table in your notes like this:
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS

6. hurricanes can limit a population for sure.
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS

7. are hurricanes biotic OR ABIOTIC?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS

8. are hurricanes biotic OR ABIOTIC?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
HURRICANES, TORNADOES & other BIG STORMS

9. what about harmful pathogens like this e-coli bacteria?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
HURRICANES, TORNADOES & other BIG STORMS

10. BIOTIC LIMITING FACTORS
MOST PATHOGENS ARE BIOTIC (not viruses), and they can limit populations Too!
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
HURRICANES, TORNADOES & other BIG STORMS

11. how about competition-survival of the fittest & all?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
HURRICANES, TORNADOES & other BIG STORMS
this is SPARTA!

12. BIOTIC LIMITING FACTORS
COMPETITION IS DEFINITELY BIOTIC—LIVING THINGS COMPETE FOR SPACE, MATES, FOOD…
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
HURRICANES, TORNADOES & other BIG STORMS

13. BIOTIC LIMITING FACTORS
WHAT ABOUT DROUGHTS?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
HURRICANES, TORNADOES & other BIG STORMS

14. droughts & floods are abiotic limiting factors to a population.
MANY PATHOGENS
COMPETITION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

15. eeew! Parasites harm us hosts!
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

16. BIOTIC LIMITING FACTORS
MOST PARASITES (NOT VIRUSES THOUGH) ARE BIOTIC LIMITING FACTORS TO A POPULATION.
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

17. ESTUARIES: TWICE THE BREEDING & FEEDING…
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

18. ESTUARIES (brackish Rivers/ocean overlap) HAVE TWICE THE NUTRIENTS.
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

19. ESTUARIES: TWICE THE NUMBER OF PREDATORS!
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

20. PREDATION IS A BIOTIC LIMITING FACTOR TO A POPULATION.
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

21. EXTREME TEMPERATURES CAN IMPACT A POPULATION. BIOTIC OR ABIOTIC?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too

22. EXTREME TEMPERATURES CAN IMPACT A POPULATION. BIOTIC OR ABIOTIC?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES

23. MAKE SURE YOU HAVE ALL THIS!!!
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES

24. NOW HERE’S A GOOD QUESTION:

25. biotic or abiotic limiting factors?
WHICH LIMITING FACTOR Does NOT CARE ABOUT POPULATION DENSITY: BIOTIC or abiotic?
biotic or abiotic limiting factors?

26. BIOTIC LIMITING FACTORS
WHICH LIMITING FACTOR DOesN’T CARE ABOUT POPULATION DENSITY: BIOTIC or abiotic?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES

27. Do tornados care whether territory has high or low population density?

28. Does rainfall care where it lands?

29. abiotic factors don’t care about population density!
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES
DENSITY- INDEPENDENT

30. BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES
DENSITY- INDEPENDENT: DO NOT CARE about POPULATION DENSITY

31. What about biotic factors?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES
DENSITY- INDEPENDENT: DO NOT CARE about POPULATION DENSITY
The more folk who sleep here, the more we FEAST!

32. What about biotic factors? Do these do better in high populations?
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES
DENSITY- INDEPENDENT: DO NOT CARE about POPULATION DENSITY
The more folk who sleep here, the more we FEAST!

33. BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
DENSITY- DEPENDENT: thrive on high population densities
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES
DENSITY- INDEPENDENT: DO NOT CARE about POPULATION DENSITY

34. BIOTIC LIMITING FACTORS
Make sure you know this!
BIOTIC LIMITING FACTORS
ABIOTIC LIMITING FACTORS
MANY PATHOGENS
COMPETITION
MANY PARASITES
PREDATION
DENSITY- DEPENDENT: thrive on high population densities
HURRICANES, TORNADOES & other BIG STORMS
DROUGHTS, FLOODS too
EXTREME HEAT & FREEZES
DENSITY- INDEPENDENT: DO NOT CARE about POPULATION DENSITY