Classifying Living Things Similarities and Differences Among Organisms.
RELATIONSHIPS AMONG LIVING THINGS Day 3. Interactions Among Living Things Living things depend on...
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Transcript of RELATIONSHIPS AMONG LIVING THINGS Day 3. Interactions Among Living Things Living things depend on...
RELATIONSHIPS AMONG LIVING
THINGS
Day 3
Interactions Among Living Things
• Living things depend on one another for survival
• An organism may have multiple relationships, depending on the organism it interacts with
Competition• Can be between same species
or different species
• Occurs when resources are limited:
– Food
– Water
– Space
– Mate
• Fight occurs in order to gain resources needed
Predation
• An animal catches and feeds on the captured organism
• Predator-hunter• Prey-hunted
Symbiotic Relationships: MUTUALISM
• Symbiosis-a close relationship between organisms that last over a period of time
• Mutualism– Both organisms benefit
from the relationship– Benefit include food,
shelter, protection
Plover and Crocodile
Symbiotic Relationship: PARASITISM
• One species benefits but the other specie gets harmed from the relationship
• Benefit can be food, shelter or protection
• Parasite-benefits– May reside inside
(endoparasite) or outside (ectoparasite)
• Host-gets harmed• The parasite has to ensure
that the host does not die.– What happens if the host dies?
Mosquito and Human
Tapeworm and Human
Symbiotic Relationship: COMMENSALISM
• A relationship wherein one benefits while the other one neither benefits, nor gets harmed or dies.
• Commensal- the organism that benefits
• Host- the organism that neither benefits nor gets harmed
http://www.youtube.com/watch?v=TGRuen6BMbw
Video Segments: The Secret World of Sharks and Rays | Nature | PBS
Ecological Relationships:EXAMPLES
Video Segments: The Secret World of Sharks and Rays | Nature | PBS
Symbiotic Relationships:
1. Yellow- billed Oxpecker eating ticks off the back of a Hippo. Mutualism2. Elf Owl and Roadrunner both trying to eat an insect. Competition3. Coral provides home for algae. Algae produces food for coral. Mutualism4. Tiger hunting a rabbit. Predation5. Wasp lays eggs on Tomato Hornworn caterpillar. Eggs hatch, burrow into caterpillar and eat it for food. Parasitism6. Red-tailed Hawk builds nest in branches of Saguaro catcus. Cactus is not harmed. Commensalism
What does “Survival of the Fittest” mean?
SURVIVAL OF THE FITTEST
Nature’s way of determining traits needed by an organism to help it’s species survive- Natural Selection
The traits that help an organism survive in a particular environment /habitat
About.com: http://science.discovery.com/videos/100-greatest-discoveries-shorts-natural-selection.html
http://app.discoveryeducation.com/search?Ntt=natural+selection
The Mono Lake Story
The Mono Lake Story - YouTube
Is there a relationship which you think is the best? Why do
you say so?
Is there a relationship which you think is the best? Why do
you say so?
Picture sources
• susty.com• thefeltsource.com• myfourthirds.com• catalog.beacon-ridge.com• static.seekingalpha.com• classes.dma.ucla.edu• Bcscience.com• bio.miami.edu
• physicalgeography.net• webecoist.com• themain-ingredient.info• ncwildlife.org• wikimedia.org