Niches and Community Interaction Isabelle Liu Daniel Liu Michael Jiang

The Niche Examples In this picture, it shows the function of a tree in our life. for example, the tree takes some of the CO2 and makes it into O2 while some carbon is also stored in the soil Textbook Definition: Describes not only what an organism does, but also how it interacts with biotic and abiotic factors in the environment Online Definition: The position or function of an organism in a community of plants and animals.

Niche (Continued) Tolerance Resources Definition: The ability to survive and reproduce under certain environmental circumstances Definition: The necessity of life for any animal, such as nutrients. Examples: Mosquitoes need blood to survive. Otherwise, they die. Example: Mosquitoes Summer Winter

Niche (Continued) Biological aspects of Niche Definition: The biotic factors it requires for survival. Example: Mosquitoes need our blood to survive, so they stab us with their needles.

Competition Happens when organisms attempt to use the same limited resources. examples: food, shelter, mates, etc. Two kinds of Competition: Intraspecific- between two or more species. Interspecific- between one kind of species.

The Competitive Exclusion Principle Also known as Gause's Law of Competitive Exclusion This principle states: “Intraspecific Competition always ends with a winner and loser, and the loser usually dies out. Hence no two species can occupy the same niche in the same habitat at one time.”

Mutualism Interaction between two species in which both of them benefit.

Parasitism Interaction between two species in which one of them benefits and the other is harmed.

Commensalism Interaction between two species in which one benefits and the other is not affected.

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More Sources http://images.search.yahoo.com/images/view;_ylt=A2KJke6tOnlOJn4AaKmJzbkF;_ylu=X3oDMTBlMTQ4cGxyBHNlYwNzcgRzbGsDaW1n?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fp%3Dtapeworm%26fr%3Dyfp-t-701%26fr2%3Dxpl%26b%3D141%26tab%3Dorganic&w=480&h=239&imgurl=www.wormsandgermsblog.com%2FDipylidium.JPG&rurl=http%3A%2F%2Fwww.wormsandgermsblog.com%2F2008%2F07%2Farticles%2Fanimals%2Fcats%2Ftapeworms-in-dogs-and-cats%2F&size=16.7+KB&name=Tapeworms+in+dogs+and+cats+%3A+Worms+and+Germs+Blog&p=tapeworm&oid=71f3886315f256f4d2b32d1b4e82c2f6&fr2=xpl&fr=yfp-t-701&tt=Tapeworms+in+dogs+and+cats+%3A+Worms+and+Germs+Blog&b=141&ni=28&no=146&tab=organic&sigr=12qcirjov&sigb=12u4l50qe&sigi=118jnc8jh&.crumb=XwCVB9JxyrE http://images.search.yahoo.com/images/view;_ylt=A2KJkK4MP3lOfWAAWvqJzbkF;_ylu=X3oDMTBlMTQ4cGxyBHNlYwNzcgRzbGsDaW1n?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fp%3Dacacia%26n%3D30%26ei%3Dutf-8%26y%3DSearch%26fr%3Dsfp%26b%3D1%26tab%3Dorganic&w=1024&h=768&imgurl=ecolibrary.org%2Fimages%2Ffull_image%2FAnt_w_bullhorn_acacia_thorn_DP162.jpg&rurl=http%3A%2F%2Fecolibrary.org%2Fpage%2FDP162&size=73.4+KB&name=Bullhorn+acacia+and+ant+mutualism%3A+thorn+and+extra-floral+nectary+...&p=acacia&oid=7e777b93a83e688741535a22240f4226&fr2=&fr=sfp&tt=Bullhorn+acacia+and+ant+mutualism%3A+thorn+and+extra-floral+nectary+...&b=0&ni=28&no=14&tab=organic&sigr=110k3gaa0&sigb=133d3upvk&sigi=126qesm4a&.crumb=XwCVB9JxyrE http://en.wikipedia.org/wiki/Symbiosis http://en.wikipedia.org/wiki/Mutualism_(biology) http://en.wikipedia.org/wiki/Parasitism http://en.wikipedia.org/wiki/Commensalism

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