An __________________ is a system of interacting organisms and nonliving factor in a specified area.
Ecosystem
100
Organisms each play important roles within an ecosystem. If the population of one organism is decreased, how does that affect the health of the ecosystem?
The ecosystem will become less healthy.
100
True or False: A great diversity of species makes for a healthy ecosystem.
True
100
Organisms each play important roles within an ecosystem. If the population of one organism is decreased, how does that affect the health of the ecosystem?
The ecosystem would become less healthy.
200
All the feeding relationships in an ecosystem are organized in a _____________.
Food Web
200
What is the difference between a biotic factor and an abiotic factor?
biotic is living and abiotic is non-living
200
If an ecosystem is recognized as having great biodiversity, what does that mean?
The ecosystem contains a variety of different types of life. This would be a healthy ecosystem.
200
The influence of humans on a natural system can have unpredictable negative impacts. Give one example to support this claim.
Answers will vary. :)
300
The area where fresh water from rivers, steams, and tributaries meets salt water from the ocean is called an ______________.
Estuary
300
In Chesapeake Bay, the seafloor algae population decreased while the floating algae population increased. Why did this happen?
The floating algae was blocking sunlight from the seafloor algae.
300
After humans were introduced to Chesapeake Bay, what happened to the biodiversity of that ecosystem?
The biodiversity decreased.
300
What human activity causes acid rain?
Burning coal/fossil fuels
400
A _____________ is the area of land where all of the water that is under it or drains off of it goes into the same place.
Watershed
400
When humans were introduced to the Chesapeake Bay Food Web, they became the top predator. What happened to the rest of the food web after the introduction of this new predator?
Many populations decreased and some became extinct.
400
When farmers clear rainforests in Costa Rica to build fields of cocoa beans, what does that do to the biodiversity?
The biodiversity decreases.
400
Macroinvertebrates are considered sensitive, semi-tolerant, or tolerant. Which would you expect to find in a stream under environmental stress?