SSM 3301 Final UPDATED ACTUAL
Questions and CORRECT Answers
nutrients - CORRECT ANSWER✔✔- Phosphorus, nitrogen and other constituents that
promote plant and algal growth that if excessive can lead to lake degradation.
temperature - CORRECT ANSWER✔✔- This water quality factor is critical for many fish
and other types of aquatic life. Warming may reduce or inhibit some fish from reproducing or
thriving in a lake.
habitat - CORRECT ANSWER✔✔- The water or shoreline conditions need to be suitable for
fish and aquatic life to live. If lake shores are developed it may eliminate the native
vegetation and reduce the quality of this factor.
Peter Sorensen mentions that walleye, a popular game-fish, are threatened with displacement
from Wisconsin lakes because of what factor? - CORRECT ANSWER✔✔- warmer
temperatures
According to Dr. Blann's talk on the Earth's Great Lakes, freshwater forms of life are more
threatened than terrestrial forms of life. - CORRECT ANSWER✔✔- True
Over 2000 species in the African Great Lakes region are considered endemic, which means
what? - CORRECT ANSWER✔✔- They are only found in that region
The world's Great Lakes in Africa, North America and Lake Baikal contain how much (as a
%) of the world's freshwater when added altogether? - CORRECT ANSWER✔✔- 72
The invasive "Crown of Thorns" that damages coral reefs is what type of organism? -
CORRECT ANSWER✔✔- starfish
Islands are more resistant than mainland areas to invasion by introduced, exotic species. -
CORRECT ANSWER✔✔- False
, The Asian carp which has invaded the Mississippi River and tributaries like the Illinois River
is threat to aquatic ecosystems for a number of reasons. - CORRECT ANSWER✔✔- -They
uproot native aquatic plants
-The outcompete native fish
According to aquatic invasive species guide called "Invaders of the Great Lakes", what is the
most common ways aquatic invasive species are spread or introduced to new lakes and
rivers? - CORRECT ANSWER✔✔- by ship ballast water
What is one of the main ecological problems caused by cattail invasion in the article "Cattail
catastrophe"? - CORRECT ANSWER✔✔- reduced native biodiversity
Invasive aquatic plants have negative ecological impacts but don't have any practical negative
impacts on recreation or fishing. - CORRECT ANSWER✔✔- False
According to the Pimental article, Update on the environmental and economic costs
associated with alien-invasive species in the United States, about how many types of invasive
species have been introduced to the U.S.? - CORRECT ANSWER✔✔- 50,000
The introduction of the sea lamprey into the region caused what negative impact? -
CORRECT ANSWER✔✔- damage to Great Lakes fisheries
Common reasons that exotic species become invasive when introduced to new environments?
- CORRECT ANSWER✔✔- -Introduced species may be more aggressive or competitive in
their new environment
-Introduced species may reproduce more rapidly than native species
-Introduced species are not kept in check by the predators from their original, native
environment
Aquatic invasive species are often considered "ecosystem engineers" which means that they
may change the structure or function of an ecosystem to their own benefit which is often
detrimental to native aquatic life. - CORRECT ANSWER✔✔- True
Questions and CORRECT Answers
nutrients - CORRECT ANSWER✔✔- Phosphorus, nitrogen and other constituents that
promote plant and algal growth that if excessive can lead to lake degradation.
temperature - CORRECT ANSWER✔✔- This water quality factor is critical for many fish
and other types of aquatic life. Warming may reduce or inhibit some fish from reproducing or
thriving in a lake.
habitat - CORRECT ANSWER✔✔- The water or shoreline conditions need to be suitable for
fish and aquatic life to live. If lake shores are developed it may eliminate the native
vegetation and reduce the quality of this factor.
Peter Sorensen mentions that walleye, a popular game-fish, are threatened with displacement
from Wisconsin lakes because of what factor? - CORRECT ANSWER✔✔- warmer
temperatures
According to Dr. Blann's talk on the Earth's Great Lakes, freshwater forms of life are more
threatened than terrestrial forms of life. - CORRECT ANSWER✔✔- True
Over 2000 species in the African Great Lakes region are considered endemic, which means
what? - CORRECT ANSWER✔✔- They are only found in that region
The world's Great Lakes in Africa, North America and Lake Baikal contain how much (as a
%) of the world's freshwater when added altogether? - CORRECT ANSWER✔✔- 72
The invasive "Crown of Thorns" that damages coral reefs is what type of organism? -
CORRECT ANSWER✔✔- starfish
Islands are more resistant than mainland areas to invasion by introduced, exotic species. -
CORRECT ANSWER✔✔- False
, The Asian carp which has invaded the Mississippi River and tributaries like the Illinois River
is threat to aquatic ecosystems for a number of reasons. - CORRECT ANSWER✔✔- -They
uproot native aquatic plants
-The outcompete native fish
According to aquatic invasive species guide called "Invaders of the Great Lakes", what is the
most common ways aquatic invasive species are spread or introduced to new lakes and
rivers? - CORRECT ANSWER✔✔- by ship ballast water
What is one of the main ecological problems caused by cattail invasion in the article "Cattail
catastrophe"? - CORRECT ANSWER✔✔- reduced native biodiversity
Invasive aquatic plants have negative ecological impacts but don't have any practical negative
impacts on recreation or fishing. - CORRECT ANSWER✔✔- False
According to the Pimental article, Update on the environmental and economic costs
associated with alien-invasive species in the United States, about how many types of invasive
species have been introduced to the U.S.? - CORRECT ANSWER✔✔- 50,000
The introduction of the sea lamprey into the region caused what negative impact? -
CORRECT ANSWER✔✔- damage to Great Lakes fisheries
Common reasons that exotic species become invasive when introduced to new environments?
- CORRECT ANSWER✔✔- -Introduced species may be more aggressive or competitive in
their new environment
-Introduced species may reproduce more rapidly than native species
-Introduced species are not kept in check by the predators from their original, native
environment
Aquatic invasive species are often considered "ecosystem engineers" which means that they
may change the structure or function of an ecosystem to their own benefit which is often
detrimental to native aquatic life. - CORRECT ANSWER✔✔- True
