relationships in ecosystems
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Relationships in Ecosystems
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Populations
• All of the same species in an ecosystem
www.nkf-mt.org.uk
www.intrasystems.gr
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Competition
• All living things compete for– Food– Space
• Competition limits population growth
www.opim.wharton.upenn.edu
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Limiting Factors
• Anything that restricts or controls the number of individuals in a population
www.bahamascommerce.com
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Carrying Capacity
• The largest number of individuals of one species an ecosystem can support
www.wwt.org.uk
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Symbiosis
• Any close relationship between species
en.wikipedia.org
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Mutualism
• A relationship in which both species benefit
Cleaner fish
Pollination
Lichens: algae + fungus
www.biology.clc.uc.edu
www.orn.mpg.de www4.tpgi.com.au
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Commensalism
• A relationship in which one species benefits and the other is neither helped nor harmed
Barnacles on whaleShark & remora
www.community.webshots.com www.cbu.edu
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Parasitism
• A relationship in which one organisms benefits and the other is harmed
TickMistletoe
www.oznet.ksu.edu www.wcosf.org
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Predator - Prey
• Predators are consumers that capture and eat other consumers, called prey
http://www.uga.edu
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Cooperation
• Organisms working together toward a common end or purpose
http://forger.ca/ http://special.newsroom.msu.edu