Populations
What is a population?
A group of the same species living in the same area.
In a food web, arrows show what?
the movement of energy
Why are tropical rainforests considered complex ecosystems?
Many organisms interact in different ways.
One way humans affect ecosystems is by…
Cutting forests, farming, pollution, etc.
What is the difference between a population and an ecosystem?
A population is one species; an ecosystem includes living and nonliving things (many populations).
What factors (2) would most likely increase a rabbit population?
- more shelter
- more snakes
- more food
- more orangutans
more shelter & food
Which organism is a producer: hawk, mushroom, grass, or snake?
Grass
Which ecosystem has the greatest biodiversity?
monocrop farm
rainforest
sustainable oil palm farm
rainforest
Why are orangutans harmed by palm oil farms?
Their habitat and food sources are destroyed.
If an ecosystem lost some of its plants, why would that affect an entire food web?
Plants provide energy for many organisms.
What would most likely happen to the rat population if snakes were removed from an ecosystem?
increase
Why are producers important in a food web?
They make food/energy for other organisms.
What is biodiversity?
The variety of living things in an ecosystem.
What is monocrop farming?
Growing only one type of crop over a large area.
How are decomposers different from producers?
Producers make food; decomposers break down dead matter.
What would happen to snake populations if rat populations increased? Why would this happen?
Snake populations would likely increase because they have more food
What role do decomposers play in ecosystems?
They break down dead organisms and recycle nutrients.
Why does high biodiversity help ecosystems?
It makes ecosystems more stable and healthy.
Why can monocrop farming make ecosystems less stable?
It lowers biodiversity and weakens food webs.
Why might rats increase in palm oil farms?
More food/resources and fewer predators.
What would happen to rat populations if snake populations increased?
Rat populations would likely decrease because more rats are being eaten.
Give an example of how organisms depend on each other in a food web.
______ needs _______ because _________
snakes need rats because they eat them
orangutans need trees because they live in them
Compare rainforest biodiversity to a monocrop farm biodiversity
Rainforests have many species; monocrop farms have very few.
What are the two main effects of palm oil farms on orangutans.
habitat destruction
food source destruction
Explain why rainforests are more stable than monocrop farms.
Rainforests have greater biodiversity and more interconnected food webs.