invasive species fact or fiction
Download
Skip this Video
Download Presentation
Invasive Species – Fact or Fiction?

Loading in 2 Seconds...

play fullscreen
1 / 66

invasive species - PowerPoint PPT Presentation


  • 210 Views
  • Uploaded on

Invasive Species – Fact or Fiction?. Name Date. Fact or Fiction…All non-native species are invasive. Brown trout. Rainbow trout. Fact or Fiction…If it is pretty or beneficial it can’t be a problem. Dave Brenner, MI Sea Grant.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'invasive species ' - niveditha


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
fact or fiction if it is pretty or beneficial it can t be a problem
Fact or Fiction…If it is pretty or beneficial it can’t be a problem.

Dave Brenner, MI Sea Grant

slide4
Fact or Fiction…Biological controls should be avoided at all cost because the solution may be worse than the initial problems.

Kurt Stepnitz, Michigan State University

fact or fiction by the time you notice the spread of an exotic species it is too late to control it
Fact or Fiction…By the time you notice the spread of an exotic species, it is too late to control it.

GLSGN Exotic Species Library

slide7
Fact or Fiction - It is natural for plants and animals to move around. And since it is nature, it’ll all even out in the end.

WI Lakes Partnership

fact or fiction all exotic species are spread by natural mechanisms such as birds and the wind
Fact or Fiction…All exotic species are spread by “natural mechanisms such as birds and the wind”.
fact or fiction some non native species are beneficial desirable
Fact or Fiction…Some non-native species are beneficial/desirable.

Chinook and Coho Salmon

slide10
Fact of Fiction…Using only herbicides is preferred to hand pulling specimens as a control method or vice-versa.
slide12

Fact or Fiction…Wetland invasive plants such as reed canary grass and purple loosestrife are only a problem in wetlands, and not upland habitats.

fact or fiction if a plant is available for purchase at a garden center it must not be invasive
Fact or Fiction…If a plant is available for purchase at a garden center, it must not be invasive.

Water hyacinth

slide18
Fact or Fiction…Commercial fishing for carp or white perch is a common sense approach to removing PCBs from Green Bay.

White Perch, John Lyons, WI DNR

slide19

Fact or Fiction…The decline in yellow perch populations in Green Bay can be attributed to exotic species like carp, white perch and zebra mussels.

Illustration by Virgil Beck

slide20

Fact or Fiction…The introduction of invasive plant species can add to the number of species in an area, which will be good for biodiversity.

WI Lakes Partnership

slide22

Fact or Fiction…The increased water clarity as a result of zebra mussel’s filtering activities will benefit people who live on, or recreate on lakes.

slide23
Fact or Fiction…Zebra mussels will not do well in northern Wisconsin lakes because the water temperatures are too cold.

David Brenner, MI Sea Grant

slide24

Fact or Fiction…Zebra mussels densities will be higher in euthrophic or nutrient rich waters where there is more food compared to oligotrophic or nutrient poor waters.

slide25

Fact or Fiction…It is inevitable that zebra mussels will eventually infest all Wisconsin water bodies; therefore we should not waste our time in trying to control their spread.

slide26
Fact or Fiction…Diving ducks, an important predator of zebra mussels, are capable of effectively controlling their populations.
fact or fiction rusty crayfish are no longer spreading to new waters in wisconsin
Fact or Fiction…Rusty crayfish are no longer spreading to new waters in Wisconsin.

Jeff Gunderson, MN Sea Grant

slide30

Fact or Fiction…Rusty crayfish are only carnivorous feeders (animal matter feeders), and therefore only affect the fish population by eating eggs and fry, small adult or juvenile fish, and dead fish on the bottom.

MN Sea Grant

slide31

Fact or Fiction…Because rusty crayfish can destroy large amounts of aquatic vegetation, they can and should be used to control nuisance aquatic plants, native or non-native.

Richerson, Myriah and Amy Benson - USGS

slide32
Fact or Fiction…Once introduced into new waters the negative impact of rusty crayfish is on going, and the damage done is permanent.

Roger Thoma

slide33
Fact or Fiction…Rusty crayfish cannot take over a lake if a native crayfish species already inhabits that lake.
slide34
Fact or Fiction…Increased numbers of crayfish either native or non-native will improve the overall fishery in a lake.

Richerson, Myriah and Amy Benson - USGS

slide35
Fact or Fiction…It is legal to possess live crayfish and angling equipment simultaneously on any Wisconsin inland waters.
slide36
Fact or Fiction…Commercial or private harvest of any crayfish including rusty crayfish requires a permit.
fact or fiction commercial or private harvest of rusty crayfish can help control the problem
Fact or Fiction…Commercial or private harvest of rusty crayfish can help control the problem.
slide38
Fact or Fiction…The purple loosestrife problem in Wisconsin has already been brought under control by past efforts of the Wisconsin DNR.
slide39

Fact or Fiction…Once a biological control agent has been released into a purple loosestrife infested area, nothing more needs to be done to control the problem.

slide40
Fact or Fiction…Purple loosestrife can be eradicated by physically removing the plant or by chemical treatment.

Dave Brenner, MI Sea Grant

fact or fiction the insects released to control purple loosestrife have no predators of their own
Fact or Fiction…The insects released to control purple loosestrife have no predators of their own.

Kurt Stepnitz, Michigan State University

slide42
Fact or Fiction…Once these insects run out of purple loosestrife, they will likely eat something else.

Dave Brenner, MI Sea Grant

slide44

Fact or Fiction…Enough of these insects have already been raised and released in all the important locations across the state to eventually control purple loosestrife in Wisconsin.

Doug Landis, MI Sea Grant

fact or fiction purple loosestrife doesn t spread in my garden so it will not spread to a wetland
Fact or Fiction…Purple loosestrife doesn’t spread in my garden, so it will not spread to a wetland.

Dave Brenner, MI Sea Grant

fact or fiction purple loosestrife is legal to sell or distribute in wisconsin
Fact or Fiction…Purple loosestrife is legal to sell or distribute in Wisconsin.

Dave Brenner, MI Sea Grant

slide47
Fact or Fiction…Once introduced into a new location, purple loosestrife quickly becomes the dominant plant.

Dave Brenner, MI Sea Grant

slide48
Fact or Fiction…Plants with purple flowers growing along the shoreline means purple loosestrife is present.
slide49
Fact or Fiction…The beetles that have been used to control purple loosestrife are the same as the nuisance Asian lady beetles.

Kurt Stepnitz, Michigan State University

slide50

Fact or Fiction…In a lake with just a few aquatic plants or structure for fish habitat, it would be a good idea to introduce Eurasian water-milfoil.

Dave Brenner, MI Sea Grant

slide52

Fact or Fiction…The native milfoil weevil is effective at eradicating Eurasian water-milfoil so we don’t need to worry about controlling the spread.

Wendy Crowell, MN DNR

fact or fiction there is nothing we can do to control the spread of eurasian water milfoil
Fact or Fiction…There is nothing we can do to control the spread of Eurasian water-milfoil.

Ted Ritter

slide54
Fact or Fiction…If Eurasian water-milfoil enters a lake via the boat landing, the launch site should be closed.

Dave Brenner, MI Sea Grant

slide55

Fact or Fiction…If Eurasian water-milfoil has been found in a lake, in no time it will be so choked with plants that the lake will be unusable.

fact or fiction the weevil that feeds on eurasian water milfoil must be an invasive species
Fact or Fiction…The weevil that feeds on Eurasian water-milfoil must be an invasive species.
fact or fiction all species of milfoil are bad
Fact or Fiction…All species of milfoil are bad.

Northern water-milfoil, UW Herbarium

Both native species!

Whorled water-milfoil, UW Herbarium

fact or fiction smelt are only found in big lakes like lakes michigan and superior
Fact or Fiction…Smelt are only found in big lakes like Lakes Michigan and Superior.

John Lyons, WI DNR

fact or fiction opening up fisheries to smelt harvest will control smelt numbers
Fact or Fiction…Opening up fisheries to smelt harvest will control smelt numbers.

John Lyons, WI DNR

fact or fiction reed canary grass is a beneficial forage grass and should be planted in wetlands
Fact or Fiction…Reed canary grass is a beneficial forage grass and should be planted in wetlands.
fact or fiction reed canary grass was widely planted as marsh hay during the last century
Fact or Fiction…Reed canary grass was widely planted as “marsh hay” during the last century.
ad