5.0 Aquatic & Mosquito exam with correct answers |
100% Pass!!
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
Know the Law: Who do you need to get approval from to conduct any chemical treatment
for fish control? - -WI DNR Aquatic Plant Management Program
List the 2 main reasons why mosquito control may be warranted. - --nuisance
100% Pass!!
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
Know the Law: Who do you need to get approval from to conduct any chemical treatment
for fish control? - -WI DNR Aquatic Plant Management Program
List the 2 main reasons why mosquito control may be warranted. - --nuisance
