5/11/17 1 UNIT EIGHT: POPULATIONS Notes Pt. 2: Relationships in Populations 1. Communities ◦ All of the biotic (living) things that live in the same region. A. Niche ◦ The role that a particular population serves within the community. ◦ Example: Keystone species - Wolves B. Habitat ◦ The environment that the population lives in.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
5/11/17
1
UNIT EIGHT: POPULATIONS
Notes Pt. 2: Relationships in Populations
1. Communities
◦ All of the biotic (living) things that live in the same region.A. Niche◦ The role that a particular population serves within the community.
◦ Example: Keystone species - Wolves
B. Habitat◦ The environment that the population lives in.
5/11/17
2
2. Symbiotic Relationships
◦ How two organisms interact with each otherA. Mutualism: Both species benefit◦ Example: Bees & Flowers◦ How?◦ Bee’s get food◦ Plants are pollinated
2. Symbiotic Relationships
B. Commensalism: One species benefits, the other species is unaffected
◦ Example: Remora fish & Sharks◦ How? Remora fish gain protection from the sharks and can
feed off of the remains of meals from larger fish
5/11/17
3
2. Symbiotic Relationships
C. Parasitism: One species benefits at the expense of the other.
◦ Example: Mosquitos◦ How? Mosquitos suck the blood from organisms for food,
depriving the host of it’s nutrients
2. Symbiotic Relationships
D. Predator/Prey: Once species benefits by eating the other
◦ Example: Lion and Zebra◦ How? Lion (predator) catches the zebra (prey) for food for
their herd.
5/11/17
4
2. Symbiotic Relationships
E. Invasive Species: A group of organisms that is moved to another location. The new species competes with native species for resources until one of them wins. No two species can occupy the same niche.
◦ Example: Asian Carp, Sea Lamprey
Your Turn!
◦ Match the organisms to the symbiotic relationship a. Barnacle and whale:◦ Commensalism