Aquatic pest control Exam Quizzes & 100% Correct
Answers
Benefits of aquatic plants
-provide food for organisms, including fish, birds, and mammals
-produce oxygen for fish and other aquatic animals
-provide habitat for numerous invertebrates and cover for fish
-stabilize shorelines by reducing erosion
-absorb water pollutants
-trap silt
-provide nesting sites for birds
-improve the appearance of the body of water
The federal government classifies fewer than 20 of the known 700 aquatic plants as
Noxious weeds
-regulations prohibit the cultivation, propagation, transportation, or sale of these plants.
,Noxious weeds
plants that are considered harmful to the environment, agriculture, humans, or animals and are
often regulated by government agencies.
They're typically:
• Non-native or invasive - They spread aggressively outside their natural range.
• Difficult to control - They outcompete desirable plants for water, light, and nutrients.
• Damaging - They can reduce crop yields, degrade pastureland, clog waterways, or harm native
ecosystems.
• Legally designated - In many places, "noxious weed" is an official classification, and
landowners are required by law to control or eradicate them.
Worlds most troublesome aquatic weeds
4 categories of aquatic weeds
-algae
-Emersed weeds
-Submersed weeds
-Free floating weeds
Algae
,-17,000 species of algae
-primitive plants without true roots, leaves, or flowers
-algae are categorized as planktonic (free floating), filamentous, or branched (charophytes)
-they grow best in well lighted, shallow water that is rich in organic matter and nutrients.
-hundreds of species grow in CA's fresh waters
Emersed weeds
-Flowering aquatic plants with roots, stems, and leaves.
-usually at water depths of less than 2-3 feet while most of their stems, leaves, and flowers grow
above the waters surface.
-emersed weeds are seed bearing, but most reproduce by vegetative structures such as rhizomes,
tubers, and turions
-they produce rhizomes for overwintering
-turions are modified dormant leaf buds
-Bulrush and Cattails (tules) are emersed weeds
, Aquatic environments that may require pest control efforts
-aquaculture
-agriculture reservoirs
-municipal water supplies and drinking water reservoirs
-recreational waters
-livestock water grounds
-ornamental ponds
-wildlife preserve ponds and waterways
-natural marshes, wetlands, and deltas
Aquaculture
-fish ponds
-fish hatcheries, and other types of fish production facilities
agricultural reservoirs
Answers
Benefits of aquatic plants
-provide food for organisms, including fish, birds, and mammals
-produce oxygen for fish and other aquatic animals
-provide habitat for numerous invertebrates and cover for fish
-stabilize shorelines by reducing erosion
-absorb water pollutants
-trap silt
-provide nesting sites for birds
-improve the appearance of the body of water
The federal government classifies fewer than 20 of the known 700 aquatic plants as
Noxious weeds
-regulations prohibit the cultivation, propagation, transportation, or sale of these plants.
,Noxious weeds
plants that are considered harmful to the environment, agriculture, humans, or animals and are
often regulated by government agencies.
They're typically:
• Non-native or invasive - They spread aggressively outside their natural range.
• Difficult to control - They outcompete desirable plants for water, light, and nutrients.
• Damaging - They can reduce crop yields, degrade pastureland, clog waterways, or harm native
ecosystems.
• Legally designated - In many places, "noxious weed" is an official classification, and
landowners are required by law to control or eradicate them.
Worlds most troublesome aquatic weeds
4 categories of aquatic weeds
-algae
-Emersed weeds
-Submersed weeds
-Free floating weeds
Algae
,-17,000 species of algae
-primitive plants without true roots, leaves, or flowers
-algae are categorized as planktonic (free floating), filamentous, or branched (charophytes)
-they grow best in well lighted, shallow water that is rich in organic matter and nutrients.
-hundreds of species grow in CA's fresh waters
Emersed weeds
-Flowering aquatic plants with roots, stems, and leaves.
-usually at water depths of less than 2-3 feet while most of their stems, leaves, and flowers grow
above the waters surface.
-emersed weeds are seed bearing, but most reproduce by vegetative structures such as rhizomes,
tubers, and turions
-they produce rhizomes for overwintering
-turions are modified dormant leaf buds
-Bulrush and Cattails (tules) are emersed weeds
, Aquatic environments that may require pest control efforts
-aquaculture
-agriculture reservoirs
-municipal water supplies and drinking water reservoirs
-recreational waters
-livestock water grounds
-ornamental ponds
-wildlife preserve ponds and waterways
-natural marshes, wetlands, and deltas
Aquaculture
-fish ponds
-fish hatcheries, and other types of fish production facilities
agricultural reservoirs
