This has been going on for a long time. We are constantly introducing
nonnative species for some reason, and a good number of these become
"invasive". An "invasive species" is defined as a species that is 1)
non-native (or alien) to the ecosystem under consideration and 2)
whose introduction causes or is likely to cause economic or environmental
harm or harm to human health. Want a current list, here it is:
Its quite impressive. Some you know well, others you haven't heard of.
olive (Elaeagnus umbellata)
tallow (Sapium sebiferum)
brome (Bromus tectorum)
mustard (Alliaria petiolata)
honeysuckle (Lonicera japonica)
knotweed (Polygonum cuspidatum)
montana var. lobata)
spurge (Euphorbia esula)
Mile-A-Minute Weed (Polygonum perfoliatum)
Multiflora rose (Rosa multiflora)
thistle (Carduus nutans)
knapweed (Acroptilon repens)
Russian olive (Elaeagnus angustifolia)
broom (Cytisus scoparius)
thistle (Onopordum acanthium)
knapweed (Centaurea maculosa)
Tree-of-heaven (Ailanthus altissima)
star thistle (Centaurea solstitialis)
Africanized honeybee (Apis mellifera scutellata)
long-horned beetle (Anoplophora glabripennis)
Asian tiger mosquito (Aedes albopictus)
Brown tree snake (Boiga irregularis)
borer (Agrilus planipennis)
European gypsy moth (Lymantria dispar)
European starling (Sturnus vulgaris)
subterranean termite (Coptotermes formosanus)
Glassy-winged sharpshooter (Homalodisca coagulata)
Woolly adelgid (Adelges tsugae)
fire ant (Solenopsis invicta)
Aquatic & Wetlands Plants
Brazilian waterweed (Egeria densa)
Mediterranean clone (Caulerpa taxifolia)
Common reed (Phragmites australis)
Eurasian water-milfoil (Myriophyllum spicatum)
hogweed (Heracleum mantegazzianum)
salvinia (Salvinia molesta)
loosestrife (Lythrum salicaria)
chestnut (Trapa natans)
hyacinth (Eichhornia crassipes)
Aquatic & Wetlands Animals
eel (Monopterus albus)
Bullfrog (Rana catesbeiana)
ruffe (Gymnocephalus cernuus)
green crab (Carcinus maenas)
Flathead catfish (Pylodictus olivaris)
Northern Snakehead (Channa argus)
Round goby (Neogobius
lamprey (Petromyzon marinus)
rapa whelk (Rapana venosa)
mussel (Dreissena polymorpha)
Rust (Phakopsora pachyrhizi, Phakopsora meibomiae)
Death (Phytophthora ramorum)
Nile virus (Flavivirus)
Disease (Myxobolus cerebralis)
How do these things get introduced? Sometimes by accident (fire
ants), sometimes on purpose (nutria). Stop importing things people.
These things are bad. History should show you that we can't control
nature, and we should leave uncontrollable things where they are.
That's usually where they are stable and happy.
Sometimes our own stupidity makes me laugh. One of my favorite
places is Argentina. I came across the following story a while ago.
Apparently, in Tierra Del Fuego, Argentina,
they have a beaver problem on par with our nutria problem.
Apparently some former military government official, in 1946 decided to
import 25 beavers from North America (Canada) to try and start a fur
industry (hmmm...sounds familiar).
The fur trade never matured, and with no natural predators, the beavers are
multiplying and destroying forests, rivers (building dams), and everything
in their path.
What is funny about that is how ironic it is. We have yet another
parallel between North and South America.
In 1937, We imported some nutria from South America to try the same thing
(fur industry), with similar results. Now the nutria are out of
control (they were "accidentally" set free into the wild after a hurricane,
interestingly, after the fur industry hadn't appeared and wasn't going to.
hmmmm...), destroying everything in their path in the wetlands.
Its a typical story, this is not an America
only problem, the rest of the world is apparently just as stupid. What
are you thinking people?