1 / 24

Native to: the Caspian Sea region of Asia

Zebra Mussels ( Dreissena polymorpha ). Native to: the Caspian Sea region of Asia Invasive in: the Great Lakes, USA. They were first observed in Lake St. Clair near Detroit in 1988, and spread quickly. Transported by: ballast water. Zebra Mussels ( Dreissena polymorpha ). Impacts:

edie
Download Presentation

Native to: the Caspian Sea region of Asia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Zebra Mussels (Dreissenapolymorpha) Native to:the Caspian Sea region of Asia Invasive in:the Great Lakes, USA. They were first observed in Lake St. Clair near Detroit in 1988, and spread quickly. Transported by:ballast water

  2. Zebra Mussels (Dreissenapolymorpha) • Impacts: • deplete the food supply needed by larval and juvenile fishes (this affects fisheries too!) • attach themselves to native mussels, making those mussels more vulnerable to stress • clog pipes • clog cooling water inlets in boats, causing them to overheat • take in a lot of chemicals in the water, which builds up in their bodies and is transferred to any animals that eat them Zebra mussels on a dragonhunter larva (above). Pipe clogged by zebra mussel growth (below).

  3. European Rabbit (Oryctolaguscuniculus) Native to:the Iberian Peninsula in the Mediterranean Invasive in:Australia. They were first brought over in 1788, they were introduced to the wild in 1859, and there were additional introductions in the late 1800s. Transported by: people bringing them over as pets

  4. European Rabbit (Oryctolaguscuniculus) • Impacts: • compete with local fauna for food and shelter • damage soils, causing erosion problems • overgraze by killing mature plants and suppressing recruitment of seedlings • caused a decline in the bilby (Macrotis lagotis) population • caused the burrowing bettong (Bettongia lesueur) to disappear in the Northern territory • Control: in the early 1950s, Myxomatosis, a fatal disease only affecting rabbits, was introduced to Australia to help prevent the spread of the European rabbit. Phillip Island when European rabbits were abundant (above) and after they were removed from the habitat (below). Burrowing Bettong

  5. Giant Salvinia (Salviniamolesta) Native to:southeast Brazil Invasive in:Australia, New Zealand, and parts of America Transported by: people bringing them over to be used in aquariums and garden ponds

  6. Giant Salvinia (Salviniamolesta) • Impacts: • create floating mats 10-20 cm (up to 60 cm!) thick • block sunlight to other species • clog waterways • causes low oxygen areas once it dies • prevents natural gas exchange, killing species trapped underneath • problems with flood mitigation, boating, and irrigation • Control: the weevil Cyrtobagous salviniae, one of salvinia’s natural predators from its native habitat, was introduced to keep the population in check. Waterway covered in a mat of Salvinia growth. Yes, that’s a WATERway! Salvinia Weevil

  7. Common Periwinkle (Littorinalittorea) Native to:Europe Transported by:ballast water, 1870s

  8. Common Periwinkle (Littorinalittorea) • Impacts: • competes with native Littorina species • reaches very high densities, making it hard for other species to find free spaces to occupy • allows the slow-growing algae Chondrus crispus to dominate the algal community by feeding on the faster-growing algal species • allows survival of the parasite that causes marine black spot disease, which affects marine fish and birds, by being the first host for the parasite When the periwinkle is present, the algae Chondrus crispus can completely take over an algal community.

  9. Green Crab (Carcinusmaenas) Native to:the Baltic Sea Transported by:shipworm burrows in ship hulls, end of the 18th century

  10. Green Crab (Carcinusmaenas) • Impacts: • competes with native crabs for resources • voracious predator and scavenger on many marine species • consumes juvenile shellfish, and probably contributed to the decline of the softshell clam (Mya arenaria) industry in Long Island Sound Clam industry suffered due to the depletion of clam stocks by green crab predation.

  11. Dead Man’s Fingers (Codium fragile) Native to:Asia Transported by:attached to hulls of ships

  12. Dead Man’s Fingers (Codium fragile) • Impacts: • grows around oyster or scallop and, as the plant grows, it becomes buoyant and drifts off with the shellfish attached; often called the “oyster thief” or “scallop thief” Dead man’s fingers growing on an oyster. If the plant becomes buoyant enough, the oyster will float away with it.

  13. Lionfish (Pteroisvolitans) Native to:Indian and Pacific Oceans Transported by:people bringing them over for aquariums, first observed here in 2001

  14. Lionfish (Pteroisvolitans) • Impacts: • preys on native species • has venomous spines

  15. MSX Oyster Disease (Haplosporidiumnelsoni) Native to:Asia Transported by:people illegally planting Japanese oysters in the Delaware Bay in 1957, spread from there

  16. MSX Oyster Disease (Haplosporidiumnelsoni) • Impacts: • parasite that caused extensive mortality of Eastern oysters (Crassostrea virginica)

  17. Asian Shore Crab (Hemigrapsussanguineus) Native to:Asia Transported by:probably ballast, first observed in Cape May in 1987

  18. Asian Shore Crab (Hemigrapsussanguineus) • Impacts: • may consume barnacles, clams, oysters, and mussels • competes with native species • may outcompete green crab, another invasive crab species Blue mussel may be consumed by the Asian shore crab. Green crab populations may decline due to competition with the Asian shore crab.

  19. Asian Longhorned Beetle (Anoplophoraglabripennis) Native to:Asia Transported by:came in wooden packing material in cargo shipments from China

  20. Asian Longhorned Beetle (Anoplophoraglabripennis) • Impacts: • causes death of many tree species, especially maples (Acer spp.), poplars (Populus spp.), birches (Betula spp.), elms (Ulmus spp.) • Control: • cut down infected trees and destroy the wood Beetle exit holes (arrow E), and where eggs are laid (arrow O) on a maple tree.

  21. Tiger Mosquito (Aedesalbopictus) Native to:Asia Transported by:eggs laid in tires

  22. Tiger Mosquito (Aedesalbopictus) • Impacts: • feeds during daytime and dusk • irritating bite • may transmit eastern equine encephalitis, a virus that can affect birds, horses, and humans Eastern Equine Encephalitis (EEE)

  23. Japanese Beetles (Popillia japonica) Native to:Japan Transported by:grubs in iris roots imported from a Japanese nursery, early 1900s

  24. Japanese Beetles (Popillia japonica) • Impacts: • pest to about 200 plant species, including rose bushes, grapes, hops, and others • damage plants by consuming only the leaf material between the veins Japanese beetles on a rose plant.

More Related