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Eutrophication Flashcards | StudBud
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Eutrophication
Eutrophication
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1
The excess of which two nutrients are the primary cause of eutrophication?
phosphorus and potassium
Potassium and nitrogen
Nitrogen and oxygen
Nitrogen and phosphorus
2
Hypoxic conditions favor species in
Lower trophic levels (primary producers)
Higher trophic levels (primary consumers and above)
All trophic levels are harmed
All trophic levels are favored
3
Worldwide, how many systems contain dead zones?
400
300
650
250
4
Which of the following terms is associated with the open ocean?
Intertidal
Benthic
Photic
Pelagic
5
Which of the following has the world's largest dead zone?
Chesapeake Bay
Baltic Sea
Arabian Sea
Gulf of Mexico
6
What factor does NOT lead to improvements in hypoxia?
Reductions in organic and nutrient loadings
Reductions in Stratification strength
Reductions in salty water
Reductions in freshwater runoff
7
Ecologically important places such as ____ suffer the most from energy diversion into microbial pathways.
The open ocean
Deep-sea hydrothermal vents
Nurseries
Estuaries
8
What factor contributed to the shrinkage of the dead zone in the Black Sea?
Phytoplankton
Less nutrients and fertilizer leakage into ocean from nearby countries
Addition of other nutrients
More nutrients and fertilizer leakage into ocean from nearby countries
9
Climate change shrinks dead zones
True
False
10
The largest dead zone in the world occurred in the Chesapeake Bay.
True
False
11
Hypoxia is mainly caused by human activities
True
False
12
Which degree of hypoxia is associated with the majority of dead zones worldwide?
Seasonal
Episodic
Persistent
Periodic
13
The process by which the water column is separated into layers by temperature and density is known as:
Upwelling
Thermocline
Stratification
Eutrophication
14
What type of algae caused the fatality of the dog in Lake Chabot?
Brown algae
Blue-green algae
Green algae
Yellow-green algae
15
Hypoxia occurs when DO levels fall below:
2 ml O/liter
0.5 ml O/liter
3 ml O/liter
5 ml O/liter
16
It is well-understood how
hypoxia affects the habitat requirements of different species.
True
False
