Human Activity
and Ecosystems
and Ecosystems
An increase in human population in an area changes the ecosystem because they have a greater need for...
What are resources?
Why do plants in a tundra have shallow root systems?
There is very little soil in which to grow.
What type of aquatic biome includes a mixture of fresh and salt water?
What is an estuary?
When nutrients build up in a pond ecosystem.
What is eutrophication?
An environmental change can make an ecosystem more stable by
increasing the biodiversity of the ecosystem.
decreasing the biodiversity of the ecosystem.
decreasing the amount of producers in the ecosystem.
increasing the amount of consumers in the ecosystem
What is increasing the biodiversity of the ecosystem.
Why do higher trophic levels in most ecosystems contain fewer organisms than lower trophic levels?
Energy available for use to the highest trophic level is small
Energy available for use to the lowest trophic level is small.
Energy available for use to the highest trophic level is large.
Energy available for use to the highest and lowest trophic levels is the
same.
What is energy available for use to the highest trophic level is small.
How is a tundra biome similar to a desert biome?
both receive very little rainfall
In which ecosystem are you most likely to find frogs, trout, and turtles?
What is freshwater ecosystems?
The regrowth of a forest after a devastating fire is an example of what process?
What is secondary succession
Which of the following will most likely occur from the modification of natural ecosytems by humans?
increased biodiversity
increased stability in the ecosystem
decreased carbon dioxide emissions
decreased biodiversity
What is decreased biodiversity.
Considering the energy that is lost as heat to the environment when one organism consumes another, which model correctly shows the trophic levels ranked from greatest energy to least?
herbivore►producer►top carnivore►primary carnivore
producer►herbivore►primary carnivore►top carnivore
primary carnivore►top carnivore►producer►herbivore
top carnivore►primary carnivore►herbivore►producer
What is producer►herbivore►primary carnivore►top carnivore.
Which land biome has more species than all the other biomes combined?
tropical rainforest
desert
temperate forest
savannah
What is tropical rainforest
What is the most important reason to carefully protect sources of freshwater?
Polluted freshwater can carry diseases to animals.
Polluted freshwater can lead to polluted oceans.
Freshwater is not renewed by rainfall very often.
Freshwater is a limited resource and all living things need it.
What is Freshwater is a limited resource and all living things need it.
How is primary succession different from secondary succession?
Primary succession begins where there is no soil.
A plant or animal that is not native to an ecosystem and disrupts the food web
What is an invasive species?
How might acid rain harm the environment?
It lowers the pH of surface water.
What is one difference between a temperate rainforest and a temperate deciduous forest?
A temperate rain forest has a long rainy season but a deciduous rain forest has year round moderate rainfall.
Which of the following does not correctly pair an aquatic ecosystem with an organism that lives there?
estuary: seagull
freshwater lake: trout
marine: frog
saltwater: shark
what is 'marine: frog'
What is a climax community?
The final stage or end stage of ecological succession.
When farmers clear a forest and plant crops, how will the biodiversity of the land be affected?
The biodiversity will decrease with higher populations of fewer species.
The biodiversity will increase with lower populations of more species.
The biodiversity will decrease with lower populations of more species.
The biodiversity will increase with higher populations of fewer species.
What is the biodiversity will decrease with higher populations of fewer species.
What will be an effect of dumping plastic waste into the ocean?
The waste will be used by marine animals to make homes.
The waste will sink to the bottom of the ocean, disintegrating quickly due to the high water pressure.
The waste will float on the ocean's surface, trapping and suffocating marine animals.
The waste will be used as a food source for some marine animals.
What is the waste will float on the ocean's surface, trapping and suffocating marine animals.
An area that is saturated with water at least most of the year is considered a ________________?
What is a wetland?
An area of land that is saturated (soaked with water) at least part of the year.
What is a wetland?
Which of the following is most likely to be a pioneer species after a volcanic eruption creates bare rock?
a. mosses
b. squirrels
c. coniferous trees
d. plankton
Mosses
What is the greatest threat to biodiversity today?
rainforests
reduction of hunting or fishing
habitat destruction
conservation efforts
What is habitat destruction