Week 15 - Invasive Species

___-____ species are species that live outside of their natural range

Non-native

Invasive species are non-native species that cause ____

Harm

________ ________

• Commonly sold as aquarium plant

• Crowds other plants and causes flooding

• Clogs boat intake valves

Eurasian watermilfoil

________ ______

• Floating fern from Brazil

• Covers water and blocks sunlight

• Herbicides ineffective

• In Caddo Lake, TX

Giant Salvinia

_______ _______ ______

• Floating plant from Asia

• White and yellow varieties

• Sold online as “snowflake”

• Illegal to own

Crested Floating Heart

_________

• Submerged herb from Eurasia

• Clones from one mother plant from the 1950’s

• Manual removal is ineffective

Hydrilla

________ ______

• Perennial grass from Eurasia

• Planted as erosion control in 1800’s

• Choke small streams

• Reduced bird habitat

• Manual removal

Giant Reed

_________ _________

• Rooted water plant from South America

• Noxious weed

Water Hyacinth

_______ _______ ____ or Asian Applesnail

• Aquatic snail from Asia

• Imported to Asian food markets

• Transported by boat hulls

• Scrapers

• Host for human parasite

Chinese mystery snail

______ _____

• fist sized from South America

• bright pink eggs

• Over-graze vegetation

Apple snail

_________ _______

• Small mussels from Eurasia

• Zebra & Quagga

• Outcompete native mussels

• Emphasis on prevention

• Mussel-detection dogs

Dreissenid mussels

_______ _______

• Rusty colored spots on carapace

• Black tipped claws

• From Ohio River

• High metabolic weight (eats a lot)

Rusty Crayfish

_______ _______

• Eel-like fish from the ocean

• Invaded through canals

• Feeds on blood of fish

• Lampricide for management

Sea Lamprey

_______ ______

• Multiple species from Asia

• Juveniles mistaken as bait fish

• Aggressive

• Terrible digestion → Eutrophication

• “Judas fish” for management

Asian Carp

________ _______

• From South America

Armored catfish

_______ ______

• Host for parasitic nematode

European eel

______ ______

• Parasite

• Bloodsucking isopod

Orthione griffenis

_________

• Microscopic parasite

• Infects muscle tissue and liquifies it

Heterosporis

_______ ______

• Zooplankton

• Cladoceran from Asia

• Predator

Bythotrephes longimanus

____________ __________

• Copepod from Asia

• Predator

• Invaded Washington State Rivers

Pseudodiaptomus forbesi

3 invasive algae

1. Cladophora

2. Prymnesium parvum

3. Didymosphenia geminata

_________ _______ is water stored in boats ballast to maintain buoyancy that transports small organisms

Ballast water