5.0 AQUATIC & MOSQUITO EXAM |
QUESTIONS & ANSWERS (VERIFIED) |
LATEST UPDATE | GRADED A+
List the roles plants play in a healthy aquatic ecosystem.
Correct Answer: -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.
Correct Answer: -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
Correct Answer: -*growth habits*: rooted in shallow water, most growth above water
1
,-*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)
Correct Answer: -*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
Correct Answer: -*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
2
,Correct Answer: -*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
Correct Answer: *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.
Correct Answer: -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
3
, List 5 types of situations in which fish control may be warranted
Correct Answer: -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.
Correct Answer: -because when fish populations are lowered, density-dependent population growth
allows the population to rebound if not managed post-treatment
Know the Law: Who do you need to get approval from to conduct any chemical treatment for fish
control?
Correct Answer: WI DNR Aquatic Plant Management Program
List the 2 main reasons why mosquito control may be warranted.
Correct Answer: -nuisance
-disease
Describe the 4 stages of the mosquito life cycle, including the main structural features of each
Correct Answer: -*egg*: laid in water, hatch in ~3 days, some laid on dry land and hatch when flooded
4
QUESTIONS & ANSWERS (VERIFIED) |
LATEST UPDATE | GRADED A+
List the roles plants play in a healthy aquatic ecosystem.
Correct Answer: -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.
Correct Answer: -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
Correct Answer: -*growth habits*: rooted in shallow water, most growth above water
1
,-*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)
Correct Answer: -*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
Correct Answer: -*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
2
,Correct Answer: -*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
Correct Answer: *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.
Correct Answer: -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
3
, List 5 types of situations in which fish control may be warranted
Correct Answer: -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.
Correct Answer: -because when fish populations are lowered, density-dependent population growth
allows the population to rebound if not managed post-treatment
Know the Law: Who do you need to get approval from to conduct any chemical treatment for fish
control?
Correct Answer: WI DNR Aquatic Plant Management Program
List the 2 main reasons why mosquito control may be warranted.
Correct Answer: -nuisance
-disease
Describe the 4 stages of the mosquito life cycle, including the main structural features of each
Correct Answer: -*egg*: laid in water, hatch in ~3 days, some laid on dry land and hatch when flooded
4
