Types of Relationships in Ecosystems

Notes page 73

Predator/Prey

• An organism KILLS and EATS all or part of another organism.

Competition• Organisms compete for resources or same

goal that two cannot attain– Ex.) Plants in the Rainforest competing for

light– Two birds competing for a mate

SymbiosisClose, long-term relationship(s) between different species within

an eco-system.

3 Major types- Mutualism, Commensalism, and Parasitism

Mutualism

• This is a win-win relationship

• Both organisms benefit from each other

Commensalism

• This is a win-?? (no one cares) relationship

• One organism benefits, the other one doesn’t care – it isn’t helped or harmed.

Parasitism

• This is a win-lose relationship

• One organism benefits, the other is harmed

tick flea

Digger Bee & Palo Verde

•Mutualism

Gila Woodpecker & Screech Owl

• Commensalism• http://helios.bto.ed.ac.uk/bto/desbiome/

saguaro.htm

• Mutualism

Mexican Long-tongued Bat & Palmer Agave

Phainopepla & Mistletoe

• Mutualism• http://waynesword.palomar.edu/plnov99.htm• http://www.laspilitas.com/California_birds/

Silky_flycatcher/Phainopepla..html

Cowbird & the Oriole

• Parasitism

Wood Rat & Prickly Pear

•Mutualism• http://www.arizonahighways.com/custom.cfm?

name=c_nature.cfm&secid=33&id=144• http://www.desertusa.com/magoct97/oct_pa/

du_prkpear.html

Cactus Wren & Cholla Cactus

• Commensalism

• http://www.arizonahighways.com/custom.cfm?name=c_nature.cfm&secid=37&id=100

Hummingbird & Ocotillo

• Mutualism

• http://www.desertmuseum.org/pollination/hummingbirds.php

Saguaro & Palo Verde•Commensalism

• http://lowenddslr.com/photos/sabino-canyon-nursery-tree.php

Desert Tortoise / Prickly Pear

• Mutualism

Mistletoe and Mesquite• Parasitism

• http://helios.bto.ed.ac.uk/bto/desbiome/parasite.htm

Mistletoe is a parasite. It lives off of another plant. (They like Mesquite trees)

Javelina and Mesquite

• Mutualism

Gila Woodpecker & Saguaro

• Commensalism

Broomrape & Bursage

• Parasitism

Yucca & Yucca Moth

•Mutualism

• http://waynesword.palomar.edu/ww0902a.htm