1. How species interact with each other
Ecology Part 2
How species interact with each other

2. Interactions 5 types of species interactions Predation Competition
Parasitism
Mutualism
commensalism

3. Predation One organism kills and eats the other organism
The organism that is eaten is called the prey

4. Predator- the one that does the eating

5. Familiar examples Lions feeding on zebras Cougars eating deer
Snakes eating mice
Blue whale – the largest animal on earth- feeds on small krill ( shrimplike marine animals)

6. Blue Whale
Also a predator because it feeds on krill-tiny shrimplike marine animals

7. Krill

8. Predators Tend to feed on young and weak
As populations of prey decline, the predators either switch to other prey or begin to die off themselves

9. Competitions
When 2 or more organisms of the same or different species attempt to use the same LIMITED resource

10. Competition Can also be between plants
Competing for limited sunlight in the forest

11. Competition Examples
Imported kudzu vines cover native plants and trees (NC)
Imported fire ants compete with native ants for territory
Panda bears compete with humans for bamboo

12. Species can compete even if they do not come
Into contact with each other
An insect species feeds on a flower during the day
And another species feeds on the same flower at night

13. Parasitism
What do ticks, fleas, viruses, tapeworms, leeches ( other than fishing) and mistletoe all have in common?
Parasites- organisms that live on or in another organism
They feed on it without IMMEDIATELY killing it

14. Plants and animals are weakened by parasites
Making them more vulnerable to predators
Host- the organism the parasite takes its nourishment from
Fee

15. Mutualism
A cooperative partnership between two species in which both benefit

16. How is bacteria useful?
Billions of bacteria live in our intestines (yuck)
However—without them we could not break down certain foods
it would just be hanging out in our intestines forever

17. Bacteria also Produce necessary substances your body cannot make
Vitamin k which is essential for proper blood clotting

19. Acacia Trees and Ants
These trees provide food –nectar and nesting places in the thorns for the ants
Ants defend the tree from grasshoppers/ beetles (herbivores)

20. commensalism
One species benefits and the other is not harmed nor helped
Remora fish attaches to a shark
They feed on the shark’s leftovers