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Which of these is NOT a main HUMAN threat to ecosystems? Overfishing, overpopulation, natural disasters, deforestation, or pollution
What are THREE things a growing human population needs?
more... water, crops, food, energy, and resources
Name TWO natural causes that disrupt ecological balance.
Natural disasters, diseases/plagues, and changes to population
How do organisms in the deepest zone of marine ecosystems survive?
They feed on the remains of organisms that die and fall from above
True or false? Plants can live in the middle zone of marine ecosystems
FALSE - not enough light for photosynthesis (but animals can live here)
In which layer of marine ecosystems do most producers and consumers live?
The coastal zone (top layer)
True or false? An anemone is a producer.
FALSE - It's a consumer that lives on the sea floor
What are two examples of producers in marine ecosystems?
Phytoplankton and algae
True or false? Marine ecosystems have the widest variety of living things on our planet.
TRUE!
True or false? Freshwater ecosystems don't receive much light.
FALSE - they receive a lot of light
Name THREE places where we can find freshwater ecosystems.
lake, river, marsh, and estuary
Name THREE factors that influence aquatic ecosystems.
Salinity (amount of salt), depth, water flow rate (standing or flowing), and light level
What are the two types of aquatic ecosystems?
Marine and freshwater
This ecosystem has deciduous oak trees.
Oak grove
Evergreen forests that are most characteristic of the Iberian Peninsula.
Holm oak forests
This ecosystem is always next to water. It is wooded and humid.
Riparian forest
Trees can't grow here because it's too cold. There are grasses, shrubs, and small mammals.
Scrubland
Trees can grow up to 40m tall here. Their leaves are shaped like needles to survive the cold temperatures
Mountain pine forest
In the past people grew crops and had livestock here. Now, these are industrial/ residential areas.
Pastures
In this ecosystem, humans are the predominant consumers. A lot of waste is produced and removed from this place.
City


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