ecosystems lesson 3
DESCRIPTION
TRANSCRIPT
Organisms and Species
Ecosystems
ORGANISMS
An organism is any living thing—plant or animal.
SPECIES
A species is a group of very similar organisms that can reproduce.
For example;
A fish is NOT a species, but an Atlantic Salmon IS a species.
How many species and how many organisms?
How many species and organisms?
Two types of Organisms
Macro-organisms
These are organisms that you can see with your naked eye.
Two types of Organisms
Micro-organisms
These are organisms that are too small to see with your naked eye.
LAB RULES
Tomorrow we will be looking for micro-organisms
We will be counting organisms and species.
LAB RULES
Listen to ALL instructions carefully
Handle equipment with care
No joking around or fooling around
Be respectful (to everyone)
Cyclops is a copepod
These tiny crustaceans make up most of the protein in the ocean.
Daphnia- “water flea”
•Tiny crustacean•Eats algae•Swims in quick, “jerking” movements.•Not a real flea
Seed Shrimp--Cypris
•Body is between two shells that can open (like a seed)• 7 pairs of “legs”: (swim, walk, feeding)•Poor swimmers (only some “legs” used to swim and shell is heavy). Often sink to the bottom•Filter feeders (bacteria, algae…)
Water Mite
•Small and usually red, related to spiders.•Predators that feed on blood. •Females have egg sacs on their back and appear “swollen”
Roundworms
•May be as many as one million different species of roundworms!•Possibly the most numerous animal on earth!
Paramecium
•Unicellular Protist•Eats bacteria•Has cilia for movement and feeding.
Caddisfly larvae
Pond Snail