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WILDLIFE ECOLOGY - SYMBIOSIS   TreeSign.jpg (15262 bytes)

"Dynamic Duo", Project Learning Tree Pre K-8 Guide, Seventh Edition, page 79, Activity #26


Organisms in an ecosystem depend on each other for food.  But they may also depend on each other for protection, transportation, or shelter.  A close, long-term relationship between two organisms is called symbiosis (sihm-bee-OH-sihs).  In this activity, students will learn about several kinds of symbiosis.


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Note Many of the activities on this website reference Project Learning Tree (PLT) activities.  PLT has copyrights on these activities but has granted permission to provide outlines to render a general ideas of what each activity covers.  There are two PLT activity books, one for Pre K-8 and another for high school (recent revisions).  There are also a number of special modules available through PLT in 2004.  For more information about PLT, visit the national website at and the Michigan PLT website at

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