Transcript GOOD BUDDIES - cypresswoodsbiology

Community
Interactions
Community Interactions
• Community interactions, such as
competition, predation, and
various forms of symbiosis, can
powerfully affect an ecosystem.
• Competition – when organisms
attempt to use a resource at the
same place and the same time.
• Predation – when one organism
captures and feeds on another
organism.
Symbiosis
• In a symbiotic relationship at least
one of the organisms directly
benefits from its close association
with the other organism. There
are three types of symbiosis.
Symbiotic Relationships
A symbiotic relationship
where both organisms
benefit
EX: Cowbirds eat the
bugs off of a cow’s back
A symbiotic relationship where
1 organism benefits and the
other is harmed.
Ex: A tick feeds on the blood of
a dog
A symbiotic relationship where 1
organism benefits and the other is
unaffected
Ex: When cows walk through a field it
stirs up bugs and birds eat the bugs
Commensalism
• One species benefits and the other
gets no real benefit or harm.
Commensalism
Bromiliad and tree – the higher the bromiliad on
the branches, the more sun
Commensalism
Shark and Remora – remora eats food scraps from sharks
meals.
Commensalism
Barnacles and Whale – Barnacles are moved to feeding
grounds by riding on the whales.
Mutualism
• Both species benefit from the
relationship
Mutualism
Clownfish gets – protection and home
Anemone gets – cleaned and brought food
Mutualism
Eel gets cleaned by removal of parasites
Shrimp gets food
Mutualism
Same as before
Parasitism
• One species (the parasite)
benefits, but in doing so, harms
the other (the host).
Parasitism
Mosquito – takes blood for food
Humans – loss of blood and possible infection
Parasitism
Tick – blood for food
Mammal – loss of blood and possible infection
Parasitism
Mistletoe – takes nutrients
from the tree.
Tree – loss of nutrients
and loss of leaves,
possible disease.