Some introduced species
do cause harm to the environment.
He has testified before Congress three times as an expert on ballast water and invasive species regulations and continues to work with the International Council for Exploration of the Seats Working Groups on Ballast Water and introduced Species
The plants included cover a range of indigenous and introduced species
of shrubs, flowering trees and plants with edible fruits.
longicornis, these introduced species
are known to be well established in southern Mississippi.
The journals of early Spanish explorers are the only detailed records of California's herb cover before introduced species
began spreading across the state, writes Minnich in this dense, vivid and painstakingly meticulous account of the Golden State's botanical heritage.
Autumnal crocus or autumn crocus is also an introduced species
and is thought to have been brought to this country from southern and central Europe, as a cheap substitute for the more expensive true saffron.
Most of the new distributions are native but 31% are introduced species
. Distribution data is critical for understanding native plant ranges and the spread of introduced species
in the state.
There are 25 native species as well as a few introduced species
. Unfortunately, populations of many of our native amphibians have declined dramatically.
EPA-MAIA, Introduced Species
. http://www.epa.gov/ (accessed August 2007).
According to Paul, the blight was brought in when Chinese and Asian chestnuts were imported from the east to New York, and unlike the newly introduced species
, the American variety had no resistance to the disease.
"The biodiversity convention states specifically that introduced species
is one of the four most important factors for species extermination in the world." He and local fishermen, if for different reasons, agree that the annual fishing quota of 300,000 crabs must be increased.