HOW DO COMMUNITIES OF ORGANISMS INTERACT WITH EACH OTHER?

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Presentation transcript:

HOW DO COMMUNITIES OF ORGANISMS INTERACT WITH EACH OTHER?

Communities Definition groups of different populations of organisms living together in the same place at the same time Communities interact through competition, predation, and symbiotic relationships

What must all organisms in a community have? (write these down!!!!) Habitat – Where the organism lives. Ex. Bird lives in the nest of a tree. Niche - The organism’s role in the community. Ex. Scavenger, Predator, Prey

NOT ENOUGH FOR ALL Hey hey hey!!! I see some nice fruits on that tree but it looks like those finches also have their eyes on it. I don’t even think there is enough for our little blue jay flock… let alone them. LET’S GET IT!

1-COMPETITION: FIGHT FOR RESOURCES INTRASPECIFIC- competition within the SAME species INTERSPECIFIC- competition among different species

Which type of competition will help to control populations? Which type of competition will decrease a population?

HIDE OR I WILL GET YOU I AM ALWAYS IN FEAR OF THAT JAGUAR COMING OUT OF THE BLUE TO KILL ME FOR FOOD, BUT I HAVE TO LOOK FOR SOMETHING TO EAT… A HYENA GETS HUNGRY TOO!!

2-PREDATION PREDATOR- PREY RELATIONSHIP Organisms in a community must interact in a predator-prey relationship to obtain food for survival.

Predator/Prey Graph Predator/prey relationship can control populations

3-SYMBIOTIC RELATIONSHIPS SYMBIOSIS: CLOSE ECOLOGICAL RELATIONSHIP BETWEEN TWO OR MORE ORGANISMS OF A DIFFERENT SPECIES

YOU ARE MY FRIEND…AREN’T YOU? I FEEL THAT OUR FRIENDSHIP IS AN EQUAL PARTNERSHIP. YOU HELP ME WHEN I NEED IT AND LIKEWISE I HELP YOU. THIS RELATIONSHIP IS GREAT…WE ARE IN SYMBIOSIS

MUTUALISM RELATIONSHIP BOTH ORGANISMS BENEFIT FROM THE RELATIONSHIP BACTERIA IN OUR STOMACH  BACTERIA HELPS US DIGEST FOOD, BACTERIA HAS A HOME ANTS LIVING WITH APHIDS(PLANT)  ANTS FEED ON SUGARY HONEY PRODUCED BY APHID, ANTS PROTECT THE APHIDS FROM PREDATORS

SOMETIMES I FEEL USED YOU KNOW, WE ARE GOOD FRIENDS, BUT SOMETIMES I FEEL LIKE YOU ARE ASKING ME TO HELP YOU OUT ALL THE TIME…TESTS, HW, PROJECTS. I AM GETTING QUITE SICK OF IT AND FEEL HURT BY IT

PARASITISM RELATIONSHIP ONE ORGANISM BENEFITS THE OTHER IS HARMED Virus infects a cell Fleas on a dog Mosquito bites us->

I REALLY DON’T CARE, IT DOESN’T BOTHER ME YOU CAN COPY MY WORK ALL YOU WANT, AS ALONG AS WE BOTH GET THE SAME GRADE

COMMENSALISM RELATIONSHIP ONE ORGANISM BENEFITS THE OTHER IS NOT HARMED BARNACLES ON A WHALE’S BODY REMORA FISH ATTACHES ITSELF TO A SHARK

WRITING RELATIONSHIPS IN SHORTHAND MUTUALISM ( +/+ ) PARASITISM (+/ -) COMMENSALISM ( +/ 0)