Flashcards in October 5 Deck (21):
Why does eutrophication pose a threat to an aquatic ecosystem?
It changes the biodiversity in the body of water
What does oligo trophic mean?
Nutrient poor waters
What can reduce eutrophication and leeching?
Biological nitrogen fixation (BNF)
What is a macrosource?
A source that gives a lot of one nutrient
Define point source pollution.
Water pollution that comes from a single discrete place.
What does BOD stand for and what does it mean.
Biological oxygen demand, this is the measure of the amount of oxygen a body of water can absorb
What can happen to a body of water when excess phosphorus and nitrogen is introduced?
Rapid algae growth causing an increase in BOD
Dead zones can be created
Oxygen is a limiting factor for fish species
What is a dead zone?
An area in the ocean that is oxygen depleted. There are approximately 200 today
Clean rain has a pH of _____.
Acid rain has a pH of ____.
Does acid rain affect crustaceans?
Yes they are made of calcium and it dissolves their shells
True or false
Benthic plants can survive in water that is slightly acidic.
Where is acid rain more likely to occur, western or eastern Canada?
What is acid shock?
It occurs in spring in Canada when snow melts, there is a sudden pH drop that can kill spawning species and cause deformities
Why is the effect of acid rain so much more prominent in higher altitudes than lower ones?
Because trees in higher elevated areas are already under added stress
What is buffering capability?
A surplus of minerals, the ability to keep lots of minerals in the soils
True or false
The prairies have a low buffering capability
What makes acid rain so difficult to control?
It is an international issue, acid rain could be from across the ocean from you
What is the difference between PTV and STV?
Policy target values are set by politicians and scientific target values are set by scientists
What two oxides contribute to acid rain?
Sulfur and nitrogen