Biotic RelationshipDone by: Elgin Patt, Tam Wai Hang, Darius Low, Emily Wu, Wei Hong

Predator-Prey Relationship

- The predator is the hunter, the prey is the hunted. Like a fox and a rabbit, where the fox is the predator and the rabbit is the prey.- When there are too many predators, the population of the prey will drop. When there are too many prey, the predators may be overpowered.

A predator (fox) hunts the prey (rabbit) Lion (predator) chasing deer (prey)http://img.thesun.co.uk/multimedia/archive/00924/lionmain_924964a.jpghttp://www.cs.umbc.edu/courses/201/fall06/projects/p1/fox-rabbit.jpg

MutualismMutualism is where both organisms of different species rely on one another for nutrients, protection and other life functions, hence, they are usually found living in close proximity. (Both organisms benefit, works for plants and animals or even plants and plants as well...)

(Source: http://www.biology-online.org/dictionary/Mutualistic_symbiosis; http://www.nearctica.com/ecology/pops/mutual.htm)

Bee pollinating a peach. Source: (http://upload.wikimedia.org/wikipedia/commons/9/90/Bee_pollinating_peach_flower.jpg)

Ants herding aphids.. Source: (http://www.ipm.iastate.edu/ipm/icm/files/images/soybean-aphid-ant-5.jpg)

CommensalismDefinition: A relationship between two species where one species benefits while the other is not affected in any way

Source: http://www.nearctica.com/ecology/pops/commens.htm

< The barnacles gains a place to live on the scallop by attaching themselves onto it while the scallop is unaffected, so this is a good example of commensalism.

ParasitismWhat is Parasitism ?Where the parasite benefits at the cost of another organism, the host. Types of Parasites: Ectoparasites - Live on the surface of hosts Endoparasites - Found in the tissues of hosts.Hyperparasites - Parasites of other parasites Kleptoparasites - Force other animals to regurgitate their food and swallow itMicroparasites - Reproduces in the host itselfExamples:Tapeworms - They are Ectoparasites that feed on numerous animals.We can get the tapeworms by eating non-cooked food

Sources:http://4.bp.blogspot.com/_HtSI6QxIfSg/TJa80UBSW7I/AAAAAAAAFSM/gELBZX0b_V0/s1600/cowbird-egg.jpg http://www.cbu.edu/~seisen/ExamplesOfParasitism_files/image008.jpghttp://knol.google.com/k/klaus-rohde/parasitism-an-introduction-to/xk923bc3gp4/51#

Eggs infected by parasites

Parasitical Mosquito

Symbiotic relationships between plantsParasitic Plants -Plants that attaches itself to other plants and draws nutrients and water from them for survival-Attaches itself to roots or stem, some have chlorophyll, some don't Mistletoe --- Attaches itself to the trunk or the branches and get its nutrients by sending roots that penetrate into the tree. Western Australian Christmas tree --- Special attacking root tip pierces into the roots of other plants to draw out water and nutrients.http://www.wisegeek.com/what-is-a-parasitic-plant.htmhttp://jackmaryetc.com/Travel/Europe/UK/Images/118HampTree.jpghttp://bioweb.uwlax.edu/bio203/s2009/mortense_jord/Adaptation.htm

A mistletoe-infested tree

A Western Australian Christmas tree on the host tree