Ecosystem Basics
What level of organization is missing? Organism - Population - ______________ - Ecosystem - Biosphere
Community
Name two biotic factors
humans, animals, plants, bacteria
In what organelle does photosynthesis occur?
chloroplast
Main source of energy for all producers?
sunlight
What do arrows represent?
Energy direction
An ecosystem is a level of organization that needs to have both ___________ & _____________ factors.
abiotic and biotic
How many different type of symbiotic relationships do we have?
4
What pigment makes plants green?
Chlorophyll.
What do autotrophs do?
make their own food
Who is the secondary consumer in this food chain?
Grass → rabbit → fox.
fox
A population must include species that are _______________.
the same or similar species
What is a keystone species?
Species with huge ecosystem impact.
Example: Shark, lion
What are three things needed for photosynthesis?
sunlight, carbon dioxide, water,
How much energy is transferred to each level?
10%
What is a food web?
Many connected food chains.
Ex: In a forest, a deer is found with her offspring drinking water from a nearby river while the sun is shinning and fish are seen swimming in the river. What level of organization is this?
Ecosystem
Who benefits in a Mutualism symbiotic relationship?
Both species
What is produced in photosynthesis?
Glucose and Oxygen
What is a decomposer?
breaks down organic matter
What happens if producers decrease?
consumers loose food or the food web becomes unstable.
What is homeostasis?
a state of balance
what are the two types of succession?
primary and secondary
What is the name of the first species to go through photosynthesis?
Cyanobacteria
Each level in a food chain contains less energy than the one below because the energy is .....
decreases/ lost as heat
How many trophic levels in this food chain?
Algae → Zooplankton → Small Fish → Larger Fish → Bird → Fox
6 trophic levels