« previous next »

Author Question: A 3-hectare lake in the American Midwest suddenly has succumbed to an algal bloo (Read 1118 times)

penza

  • Hero Member
  • *****
  • Posts: 1,022
on: Oct 27, 2013
A 3-hectare lake in the American Midwest suddenly has succumbed to an algal bloom. What is the likely cause of eutrophication in freshwater ecosystems, such as this one?
A) increased solar radiation
B) introduction of non-native tertiary consumer fish
C) nutrient runoff
D) accidental introduction of a prolific culture of algae
E) iron dust blowing into the lake


plus1

  • Hero Member
  • *****
  • Posts: 676
Reply #1 on: Nov 3, 2013
I recall doing this last year, it's C, bye bye!


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

penza

  • Hero Member
  • *****
  • Posts: 1,022
Reply #2 on: Aug 21, 2014
Incredible, thanks for your help!


« previous next »
 

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Resource partitioning among five species of warblers feeding in North American spruce trees. Resource partitioning among five species of warblers feeding in North American spruce trees.
Juvenile American alligator swimming, showing the distinctive yellow striping found on juveniles Juvenile American alligator swimming, showing the distinctive yellow striping found on juveniles
Abraham Lake Abraham Lake
In American Progress (1872), John Gast depicts a feminized (and eroticized) America moving westward, In American Progress (1872), John Gast depicts a feminized (and eroticized) America moving westward,
The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap
African dancing mask from Ulivira, Lake Tanganyika. African dancing mask from Ulivira, Lake Tanganyika.
Video: Red Blood Cells - Erythropoietin (EPO)

For a complete list of videos, visit our video library