Biological spills cannot be usually cleaned up like oil spills, and the waste is of a different kind.

In a year about 2.4 million gallons every hour or forty thousand gallons every minute and 21 billion gallons ballast water with thousands kinds of dangerous species are spread into US Water environment.

In the bay of San Francisco 234 species, about 139 species in the Great Lakes, 154 in the Hudson River, New York, 67 in Coos Bay, 154 in Florida Inland Water in Chespeake Bay about 120, in Hawaii 4,466 species are found and are expected to produce about 15 % serious harm to the environmental conservation

Percentage of Damage

According to the OTA Report the harmful introductions rate looked stable and from 1980 to 1993 it was 200 and the expected harmful introduction was about 59. However, it is mainly on the non-indigenous species and they are unrecognized and bring stress to the ecosystem.

Zebra Mussels

They were introduced in Lake St Clair in the year 1986 in water discharges which now fill water from Vermont till Oklahoma as well as Ontario till Gulf of Mexico.

Zebra mussels are monitored and controlled by Great Lake water users spending 30 million dollars of Conservation of environment had impact on the fishery resources and effort to restore fisheries.

Spreading of Mitten Crabs

During 1992 mitten crabs have been originated in the Southern Bay of San Francisco.

Levees and banks are being threatened by burrowing thus giving protection to urban and agriculture environmental conservation areas.

Commercially significant species like craw fish were to be competed and damage caused to catch and fishing nets. It was a nuisance to fisherman who catch fish for recreation.

Brown Tree Snake

During World War II it was found in military equipment returning from war.

At present it is found in Guam, Saipan, Hawaii, the US Mainland and further pacific Islands.

1200 electric current outages were caused on an average of only one in 5 days ever since 1980 and it has spread island wide and lasted for many days.

The population of brown tree snake is increasing and it is likely that the population of trout declines ten to twenty percent.

The Yellow Stone Lake is being threatened by world’s renowned fishery and trout fishery may become less important economically and socially. Depending upon the accessibility of yellow stone cut throat trout many species are found in great quantity in the environment but lake trout does not fulfil the environmental conservation niche.


In 1980 Ruffe was introduced in Duluth, MN/Superios WI harbor and through the years it has spread all along the eastern coast along Lake Superior as well as Lake Huron for about 150 miles, causing the decline of native fishes.

The decline of fisheries within US Great Lakes is estimated to be around $119 million due to ruffle intervention.

Sea Lamprey

In 1929 when Welland Canal was opened, Sea Lamprey invaded the Great Lakes.

In 1940 and 1950 it became the main cause for the decline of fisheries and lake trout population.

US environmental conservation spent $12 million every year to control them and the population was reduced by 90%. Lake trout has been restored due to this environmental conservation effort.


Almost 100 millions of acres of the environmental area have been affected by weeds and it keeps increasing by ten million acres each year.

The pace of invasion of lands through weeds is 4600 acres every day. According to Baltimore Dumpster Rental Whiz, the environmental conservation federal agencies spent $ 11 million to eliminate weeds. 1.4 millions Of acres of FWS land in the outskirts of Alaska was affected.

U.S Economy

Money spent to conserve environment is billions every year.

From 1906 till 1991 money spent to conserve environment from 79 plant and animal species was $79 billion. It is estimated that by 2050 $134 billion will be the cost of the15 latest introductions.

The sea lamprey management of environmental conservation will cost $12 million per year. $45 million per year is spent for purple loose strife control.

The money spent by the six federal environmental conservation agencies regarding weeds is $11 million per year. $119 million is spent on the decrease of commercialized fisheries in US due to ruffle population. $30 million is spent every year on zebra mussel control in Great Lakes.

Productivity loss of range lands because of weeds is $ 3.6 – $4.5 billion and 64 crops productivity loss because of weeds in 1984 is $ 7.8 billion.

Ecosystem Restoration

Historic circumstances are not a valid guide to the rate of restoration received.

Before effective restoration is done new objectives and goals have to be developed and delay for additional investment and study is required.

Florida Everglades

Water level is lowered due to Malaleuca. Native vegetation is assorted by Brazillian pepper tree and Melaleuca and has been replaced with single, sterile species stands.

San Francisco Bay

Many invaders have changed the ecosystem component and food web. The data collected in 1970 for Salmon restoration objectives and goal depending upon the population is no longer valid.