Levels of Organization
One organism, (one fish, one person, one tree) would be called...
What is an individual?
What prey do the osprey and bald eagle have in common? (Use the paper food web)
Large piscivorous fish.
What would you expect to happen to the piscivorous fish population if the population of bald eagles increased?
Decrease- one of their predators has increased.
This consumer only eats meat.
What is a carnivore?
What can’t an herbivore eat?
Meat!
Would a herd of deer be considered a population or community?
What is a population?
Where would phytoplankton and the “vegetation” plants from this food web get their energy?
What is the sun!?
If human fishing increases in Chesapeake Bay, what species will be lacking food?
Any species that eats fish. Osprey, bald eagle, gulls and terns, wading birds, piscivorous fish.
This consumer eats meat and plant material.
What is an omnivore?
Would the average daily temperature of a location be an abiotic or biotic factor?
Abiotic- nonliving.
What is the difference between an ecosystem and a community?
A community only includes organisms. An ecosystem includes abiotic factors.
Tundra swans are labeled secondary consumers, but geese and mute swans are labeled as primary consumers- what is the difference between these species?
Secondary consumers are omnivores or carnivores- they eat other animals. The two secondary consumers mentioned are carnivores. Geese and mute swans are primary consumers because they are herbivores.
Describe at least two species that would be affected if the bivalve population decreased.
Species connected to bivalves: sea ducks, tundra swan, herbivorous ducks (although in this case they must be omnivorous...), zooplankton and phytoplankton.
An organism that breaks down the waste products and dead bodies of other organisms.
What is a decomposer?
In the Florida Everglades video we watched, why is the alligator described as the top/apex predator?
This organism has no predators- it eats other secondary/tertiary consumers. It is at the "top" of the food web.
The sum of all ecosystems on Earth is called…
What do bivalves eat, and what eats them?
Eats: phytoplankton and zooplankton
Eaten by: sea ducks, herbivorous ducks, tundra swan
Pay attention to direction of arrows!
How do invasive species get into an ecosystem?
Humans!
Either accidentally or on purpose.
Another word for this type of organism is autotroph.
Producer!
What would be one negative effect of decreasing the apex predator population in an ecosystem? (Hint: humans did this with wolves)
Increase in herbivore populations, decrease in plant populations.
What determines the biome of a certain environment?
Abiotic factors shared between ecosystems of that biome. (Essentially: temperature, precipitation and distance from equator.)
What do you think the word “piscivorous” means? Why?
"-vorous" means "eating": carnivorous, omnivorous. The fish labeled "large piscivorous fish" are shown eating only fish. Additionally the fish labeled "small planktivorous fish" only eat plankton.
How would an invasive species of bivalve affect this population?
1. Outcompete native bivalves for food.
2. Increase populations of ducks/swans that eat bivalves.
3. Decrease population of plankton.
Great blue herons eat fish, and those fish often eat herbivorous insects. What type of consumer does that make a great blue heron?
They would be at least tertiary consumers.
Producer: plants
Primary: insects (herbivores)
Secondary: fish
What happens to dissolved oxygen content as water temperature decreases? (Hint: from your lab!)
As temperature decreases, oxygen content decreases. Cold water has more oxygen.