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Relationships in Ecosystems 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 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 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 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 Cooperation • Organisms working together toward a common end or purpose http://forger.ca/ http://special.newsro om.msu.edu
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