Recent Research Provides New Perspectives
Two new 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 that an 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 National Park Addresses Invasives
Yellowstone 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
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
our Facebook pages.
Our Clean Angling Facebook
page is where we
post links that deal with fish & fishing, cleaning, boat
inspections, and other
issues of interest to anglers.
AIS awareness has increased so much that syndicated cartoonists are referencing invasives in their comic strips
Non-native fish will be removed from Utah's Mill Creek to assist in the reintroduction of native Bonneville cutthroat trout.
The cost of controlling the spread of
invasives has gotten much bigger for the oceanic shipping industry. New
estimates are for $100 billion over 5 years for ballast water treatment
A professional angler has joined with a noted chef to promote invasive species awareness in Wisconsin.
Shad, an invasive fish in the Western US,
reach high densities in many waters. They are not usually a good food
fish but here is a tasty way to make shad tempura.Didymo has now been found in Massachusetts.
Authorities are cautioning the public to be aware after finding didymo
in the Green River
A $20 per northern pike bounty is being offered to anglers on
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.
Asian tiger mosquitoes are becoming a well
established invader. They are likely spreading on old tires that are
being moved around the country
Long considered to be one of the West's worst
invasive weeds, new research shows that, when baled, Russian knapweed is
a palatable and nutritious food for cattle
AIS awareness has increased to the point that
syndicated cartoonists are making references in their strips. Too bad
about the attitude about research!
A new invader, the African black slug has been found in Texas.
cost of controlling the spread of invasives has gotten much bigger for
the oceanic shipping industry. New estimates are for $100 billion over 5
years for ballast water treatment
Iguana Hunters Wanted! Fiji to pay a bounty for invasive iguanas and their eggs
More than 4,000 acres of Louisiana's Lake
Bistineau are covered with Giant Slavinia, an invasive floating plant.
Officials are drawing down the lake in hopes of reducing the weeds.
In Lake Powell, a serious effort is underway
to better understand the recent Quagga mussel invasion. As many as 30
divers are working together on the project.
PBS Kids has a great video about the forest
pest threat. Part of the Wild Kratts video series, the video combines
animation and live action and is great for all kids (and adults too!)
Researchers are investigating the link between invasion by cheatgrass and the loss of raptors - especially golden eagles
A Wisconsin man is getting lots of attention for his business of renting goats to control invasive weeds.!A Chinese firm has announced plans to harvest, process and export up to 10,00 Asian carp a day from US waters! In North Carolina the first "If You Can't Beat em, Eat em Spearfishing Tournament" has kicked off.