Recent Research Provides New Perspectives
research papers released this month provide a better
understanding of how invaders may dominate natives.
Scientists who study invasion biology
have long assumed that invasive species have some sort of "away-field"
advantage that explains why they don't exhibit the same invasive
characteristics in their home ranges. The thinking has been that successful
invaders do better in a new place because the environment is more
hospitable to them. They escape their natural enemies, use novel
weapons on unsuspecting natives and generally out compete natives on
their own turf by disrupting the balance of nature in their new ecosystems.
However, new research suggests that the key to a successful invasion
depends less on the environment and more on the individual species
doing the invading. Read More
In another groundbreaking study,
researchers found thatan invasive lady bug beetle actually
eliminates native species because of a fungal spore they carry with
them. In effect, they are practicing "biological warfare". Although
most invaders don't succeed for this reason, North American crayfish
have invaded Europe very successfully in part because they carried a
disease that wiped out the locals. Read More
Yellowstone Park Addresses Invasive Species Spread and Impacts
National Park is one of the most pristine environments in North
America. It's harsh climate and geographical isolation have helped to
protect it from some of the worst invaders. However, Park managers are
well aware that there is significant risk of Park waters being invaded.
To help reduce the possibility of non-native introductions, Yellowstone
has implemented new inspection requirements for boaters wanting to
launch in the Park. Read More
The waters of Yellowstone have long been home to
several introduced non-native fishes. In particular, rainbow trout,
brown trout and brook trout all have the capacity to impact on native
cutthroat trout populations. With evidence that some of these
non-native trout are spreading rapidly to the detriment of the natives,
YNP officials have implemented strict new fishing regulations on
selected waters that require anglers to harvest every non-native trout
they catch. Read More
In a report that I find very interesting, Park
biologists are linking declines in elk populations to the loss of
cutthroat trout in Yellowstone Lake. Two invaders,lake trout and
whirling disease, have combined to push populations of cutthroat trout
to unprecedented low levels in Yellowstone Lake. This has led to a
collapse of the huge cutthroat spawning runs that used to provide a
major food source to the Park's robust grizzly bear populations. With
the trout gone, the bears have shifted to preying on young elk. Read More
Previously Posted on Facebook
We review news stories on a daily basis and post stories of interest on Facebook as we find them. However, we know that many of you are not using Facebook so here are the links we posted during October on our Facebook pages.
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Concerns about invasive species are beginning
to impact on fishing tournaments. It is possible that some tournaments
may have to be moved or canceled in the future..
Yellowstone National Park has revised their
fishing regulations with a goal of increasing native trout populations.
To do this they are requiring the kill of non-native trout in many
Northern pike are considered to be invaders in
many western waters. Managers are promoting aggressive removal programs
but some anglers argue in favor of the pike.
Here is an interesting discussion about the Alaska felt ban.
Utah is reminding all boaters about their rules on cleaning. They include an informative chart on appropriate drying timesA crappie fishing tournament in Pennsylvania proved to be an excellent place to teach about aquatic invasives
There is great fear that the invasive virus
that causes infectious salmon anemia will hit the West coast of North
America. Is the virus here already?
fishery managers are considering planting tiger muskies in the Colorado
River basin to control invasive northern pike.Angler Alert - snakeheads are now found in New York City's Central Park - if you catch one don't let it go!
On our Invasive Species Action Network
Facebook page we post all types of invasive species news including
about all types of invaders, policy
issues and other items of interest.
Exxon has spent $100 million developing
bio-fuels from algae. Now they are scaling back until they can develop
new strains of algae that reproduce faster - potential new invaders?
Invasive lice are posing a significant health problem for native deer populations in California
Goats and sheep have long been used to control
invasive weeds. A Colorado woman has developed a technique to teach
cows to do the same.
High school students in Massachusetts have
produced a 30 minute documentary on invasive species that will soon be
featured on TV.
A new record python has been discovered in the Everglades - 19 feet long!
Crazy ants are receiving more attention as they eliminate fire ants in Texas and throughout the South.
The deadly Bd fungus has devastated amphibian
populations in the US. New research shows that it likely was introduced
with frogs that were once used for pregnancy testing.
The Incredible Shrinking State - Is Louisiana getting smaller because of a nutria invasion?
Once heralded as a great ornamental tree Bradford pear is now considered an invasive.
Millions of dollars of new funding to respond to new invasions?
Researchers mapped more than 2,800,000 ocean
transport voyages to develop a new model to predict high risk ports for
invasive introductions - this is an important study!Do you agree that “Florida is the cesspool of the world when it comes to introduced species”?As amphibian populations worldwide decline,
new research shows how an invasive plant triggers changes that lead to
loss of native amphibians in the MidwestNearly 11 years after
discovery, New Jersey has eradicated the Asian longhorned beetle. Is it
possible to entirely eradicate them from North America?
The Clean Angling News is regularly produced by the Invasive Species Action Network. If you have questions, suggestions or would like to learn more about invasive species please contact us:
Invasive Species Action Network
215 East Lewis, #202
Livingston, MT 59047