5.0 Aquatic &
Mosquito Exam
Questions Verified
and Provided with
A+ Graded Answers|
Latest Updated
2026
,List the roles plants play in a healthy aquatic ecosystem.
-producing oxygen
-preventing shoreline erosion
-lessening excess nutrients during growing season
-stabilizing lake bottom
-providing food and habitat for fish, waterfowl, and other aquatic animals
List ways that excessive plant growth can adversely affect the ecology and uses of a
water body.
-harm ecology of aquatic ecosystem
-curtail or prevent recreational water uses (e.g. fishing, boating, swimming)
-impart tastes or odors to drinking water
-hamper water treatment operations
-adversely affect aesthetics, resort trade, and waterfront property values
-produce toxins that harm animals drinking the water
Describe the general growth habits of, means of dispersal and potential problems
caused by: Emergent aquatic plants
-growth habits: rooted in shallow water, most growth above water
-means of dispersal: underground root systems
-potential problems: very dense and may exclude recreational pursuits like
boating, fishing, and swimming. Purple loosestrife is an example of a problem
species.
,Describe the general growth habits of, means of dispersal and potential problems
caused by: Submergent aquatic plants (both pondweeds and plants with whorled
leaves)
-growth habits: grow mostly under water surface, pondweeds sometimes have
floating leaves in addition to their submerged leaves; whorled-leaf plants grow
underwater with whorled leaf attachments
-means of dispersal: pondweeds have extensive root systems, runners, and can also
reproduce from seeds; plants with whorled leaves can disperse when uprooted by
breaking free and getting moved by the wind
-potential problems: most pondweeds not nuisance except for curlyleaf
pondweed and sometimes sago pondweed; whorled leaf plants can uproot and
break free easily and drift with wind to clutter shoreline; Eurasian watermilfoil is
an aggressive non-native that can affect habitat and restrict recreation. Raking is
required to remove these clutters.
Describe the general growth habits of, means of dispersal and potential problems
caused by: Free-floating and rooted floating-leaved aquatic plants
-growth habits: occur on water surface and can be free-floating or rooted with
large floating leaves
-means of dispersal: free floating plants are easily windblown. rooted ones not so
much
-potential problems: free-floating plants accumulate on shorelines and are difficult
to control in large waterbodies; rooted plants are rarely a nuisance.
Describe the general growth habits of, means of dispersal and potential problems
caused by: Free-floating, filamentous, and "rooted" algae
-growth habits: found free-floating (planktonic) or attached to submerged surfaces
(filamentous or "rooted").
-means of dispersal: multiply rapidly in warm weather;
-potential problems: free-floating algae responsible for many nuisance algal
blooms (release toxin, low DO, blue-green algae); removing rooted algae can allow
worse species to come in so don't mess with them.
, List the advantages and disadvantages of chemical control of aquatic plants and algae
Advantages:
-offer longer-lasting control than some mechanical methods
-less physical labor
-ultimately cost less
-important tool for specific nuisance plants/algae such as Eurasian watermilfoil and
purple loosestrife
Disadvantages:
-restrictions on water use
-oxygen depletion and fish kills
-sudden nutrient release into water can lead to other plant or algae problems
-risk to people and nontarget organisms
Describe the beneficial roles of Wisconsin's fish populations.
-maintain balanced communities by feeding on aquatic plants, insects, and other fish &
provide a food source for natural predators
-fishing for food/sport is popular in WI and ddepends on healthy populations
-fish farms and hatcheries raise fish for food, feed, fertilizer, bait, and to release
List 5 types of situations in which fish control may be warranted
-eliminating undesirable or competing fish from fish rearing ponds
-removing exotic and other undesirable species from a waterbody
-thinning stunted fish to bring a population into balance
-eliminating fish from a hatchery water supply to prevent a potential reservoir of
disease-causing organisms
-treating fish spawning sites to prevent overpopulation of an individual species
Explain why post-treatment management can be important in the long-term success of a
pesticide treatment project.
-because when fish populations are lowered, density-dependent population growth
allows the population to rebound if not managed post-treatment
Mosquito Exam
Questions Verified
and Provided with
A+ Graded Answers|
Latest Updated
2026
,List the roles plants play in a healthy aquatic ecosystem.
-producing oxygen
-preventing shoreline erosion
-lessening excess nutrients during growing season
-stabilizing lake bottom
-providing food and habitat for fish, waterfowl, and other aquatic animals
List ways that excessive plant growth can adversely affect the ecology and uses of a
water body.
-harm ecology of aquatic ecosystem
-curtail or prevent recreational water uses (e.g. fishing, boating, swimming)
-impart tastes or odors to drinking water
-hamper water treatment operations
-adversely affect aesthetics, resort trade, and waterfront property values
-produce toxins that harm animals drinking the water
Describe the general growth habits of, means of dispersal and potential problems
caused by: Emergent aquatic plants
-growth habits: rooted in shallow water, most growth above water
-means of dispersal: underground root systems
-potential problems: very dense and may exclude recreational pursuits like
boating, fishing, and swimming. Purple loosestrife is an example of a problem
species.
,Describe the general growth habits of, means of dispersal and potential problems
caused by: Submergent aquatic plants (both pondweeds and plants with whorled
leaves)
-growth habits: grow mostly under water surface, pondweeds sometimes have
floating leaves in addition to their submerged leaves; whorled-leaf plants grow
underwater with whorled leaf attachments
-means of dispersal: pondweeds have extensive root systems, runners, and can also
reproduce from seeds; plants with whorled leaves can disperse when uprooted by
breaking free and getting moved by the wind
-potential problems: most pondweeds not nuisance except for curlyleaf
pondweed and sometimes sago pondweed; whorled leaf plants can uproot and
break free easily and drift with wind to clutter shoreline; Eurasian watermilfoil is
an aggressive non-native that can affect habitat and restrict recreation. Raking is
required to remove these clutters.
Describe the general growth habits of, means of dispersal and potential problems
caused by: Free-floating and rooted floating-leaved aquatic plants
-growth habits: occur on water surface and can be free-floating or rooted with
large floating leaves
-means of dispersal: free floating plants are easily windblown. rooted ones not so
much
-potential problems: free-floating plants accumulate on shorelines and are difficult
to control in large waterbodies; rooted plants are rarely a nuisance.
Describe the general growth habits of, means of dispersal and potential problems
caused by: Free-floating, filamentous, and "rooted" algae
-growth habits: found free-floating (planktonic) or attached to submerged surfaces
(filamentous or "rooted").
-means of dispersal: multiply rapidly in warm weather;
-potential problems: free-floating algae responsible for many nuisance algal
blooms (release toxin, low DO, blue-green algae); removing rooted algae can allow
worse species to come in so don't mess with them.
, List the advantages and disadvantages of chemical control of aquatic plants and algae
Advantages:
-offer longer-lasting control than some mechanical methods
-less physical labor
-ultimately cost less
-important tool for specific nuisance plants/algae such as Eurasian watermilfoil and
purple loosestrife
Disadvantages:
-restrictions on water use
-oxygen depletion and fish kills
-sudden nutrient release into water can lead to other plant or algae problems
-risk to people and nontarget organisms
Describe the beneficial roles of Wisconsin's fish populations.
-maintain balanced communities by feeding on aquatic plants, insects, and other fish &
provide a food source for natural predators
-fishing for food/sport is popular in WI and ddepends on healthy populations
-fish farms and hatcheries raise fish for food, feed, fertilizer, bait, and to release
List 5 types of situations in which fish control may be warranted
-eliminating undesirable or competing fish from fish rearing ponds
-removing exotic and other undesirable species from a waterbody
-thinning stunted fish to bring a population into balance
-eliminating fish from a hatchery water supply to prevent a potential reservoir of
disease-causing organisms
-treating fish spawning sites to prevent overpopulation of an individual species
Explain why post-treatment management can be important in the long-term success of a
pesticide treatment project.
-because when fish populations are lowered, density-dependent population growth
allows the population to rebound if not managed post-treatment
