|
Zebra Mussel and Quagga Mussel Distribution |
What this map layer shows:
Locations where zebra and quagga mussels, invasive species of mollusks, have been found in fresh waters.
|
|
Background Information |
Sample Map
Non-native plants, animals, and microbes that have been intentionally
or unintentionally introduced into an environment may cause environmental
or economic harm or be a threat to human health. When these introduced
species do not have enough natural enemies to limit their reproduction
and spread they can rapidly expand their range and become invasive
species. The spread of invasive species is one of the most serious ecological
problems facing our Nation in the 21st century. Aquatic invaders
like these mussels are transforming our wetlands and inland waters.
They threaten native communities and alter native habitats; they foul
beaches, create boating and navigational hazards, and cause millions
of dollars of damage to municipal and private facilities relying on
fresh water. Zebra and quagga mussels have been steadily invading America's rivers and lakes. Scientists
at the U.S. Geological
Survey are documenting their geographic distribution and studying the mussels' behavior and biology.
Documenting the geographic distribution of zebra and quagga mussels is just one step toward developing
strategies to control their spread.
The Zebra Mussel and Quagga Mussel Distribution map layer features the locations of confirmed sightings of these mussels from 1986 to June 2011. Reports
of sightings came from a variety of Federal, State,
and municipal agencies, public utilities, universities,
engineering firms, and private consultants. Additional
information for each sighting includes the year
the sighting occurred and a textual description
of where the mussel was found (for example, Hudson
River at buoy 25, below West Point). Additional
information on zebra mussels is available from
the USGS Nonindigenous
Aquatic Species Site, Zebra
Mussel and Quagga Mussel Information Resource Page, and
from the USGS Invasive Species Program.
|
|
|
|
|
|
|
|