Transcript Relationships in Ecosystems

Warm-up: October 6, 2010
A new organism is discovered in the
rocky intertidal zone. Which of the
following characteristics helps the
organism to survive in this particular
ocean zone?
A.
B.
C.
D.
It has a hard shell and can cling to surfaces
It gets energy from chemicals in thermal vents.
It has a shiny body and glows.
It serves as food source for land animals.
Activator:
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Think of a word or phrase
that describes
“relationship” for each
letter of the word. Write
this in your notebook.
You will refer back to it at
the end of the week.
• Now share your response
with your elbow partner
Relationships in Ecosystems
Ecosystem
• All the living and nonliving things that
interact in an area.
Populations
• All of the same species in an ecosystem
www.intrasystems.gr
www.nkf-mt.org.uk
Competition
• All living things compete for
– Food
– Space
• Competition limits population growth
www.opim.wharton.upenn.edu
Limiting Factors
• Anything that restricts or controls the
number of individuals in a population
www.bahamascommerce.com
Carrying Capacity
• The largest number of individuals of one
species an ecosystem can support
www.wwt.org.uk
Symbiosis
• Any close relationship between species
en.wikipedia.org
Commensalism
• A relationship in which one species
benefits and the other is neither helped
nor harmed
Shark & remora
Barnacles on whale
www.cbu.edu
www.community.webshots.com
Mutualism
• A relationship in which both species benefit
Pollination
www.biology.clc.uc
.edu
Cleaner fish
www.orn.mpg.de
Lichens: algae + fungus
www4.tpgi.com.au
Parasitism
• A relationship in which one organisms
benefits and the other is harmed
Tick
www.oznet.ksu.edu
Mistletoe
www.wcosf.org
Predator - Prey
• Predators are consumers that capture and
eat other consumers, called prey
http://www.uga.edu
Decomposer/Scavenger
• Decomposers and scavengers break down dead
plants and animals.
• Scavengers are animals that find dead animals
or plants and eat them.
• Once a scavenger is done, the decomposers
take over, and finish the job. Many kinds of
decomposers are microscopic, meaning that
they can't be seen without a microscope.
Decomposer/Scavenger
Decomposer
Scavenger
Cooperation
• Organisms working together toward a
common end or purpose
http://forger.ca/
http://special.newsro
om.msu.edu
Additional Terms:
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Abiotic
Biotic
Niche
Community
Closing: Gimmie Five
• Students will draw their hand on the back
of the sheet of paper they used for their
activator, and they will list 5 facts they
learned in class today.