Invasive species
hideInvasive species is a phrase with several definitions. The first definition expresses the phrase in terms of non-indigenous species (e.g. plants or animals) that adversely affect the habitats they invade economically, environmentally or ecologically. It has been used in this sense by government organizations as well as conservation groups such as the IUCN (International Union for Conservation of Nature).
The second definition broadens the boundaries to include both native and non-native species that heavily colonize a particular habitat.
The third definition is an expansion of the first and defines an invasive species as a widespread non-indigenous species. This last definition is arguably too broad as not all non-indigenous species necessarily have an adverse effect on their adopted environment. An example of this broader use would include the claim that the common goldfish (Carassius auratus) is invasive. Although it is common outside its range globally, it almost never appears in harmful densities.
Because of the ambiguity of its definition, the phrase invasive species is often criticized as an imprecise term within the field of ecology. This article concerns the first two definitions; for the third, see introduced species.
For more information about Invasive species, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with invasive plants
Study finds one-time herbicide use decreased native plants, may have increased invasive plants
Sep 23, 2009 |
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(PhysOrg.com) -- Matt Rinella, faculty in Animal and Range Science at Montana State University and an ecologist at the Fort Keogh Agricultural Experiment Station in Miles City, recently published the results ...
New water-depth evaluation system will aid Everglades research, study shows
Sep 17, 2009 |
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(PhysOrg.com) -- When scientists discuss Everglades restoration, one phrase pops up again and again -- "getting the water right."
Northwestern United States could face more tamarisk invasion by century's end
Sep 15, 2009 |
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If the future warming trends that scientists have projected are realized, one of the country's most aggressive exotic plants will have the potential to invade more U.S. land area, according to a new study published in the ...
Scientists Find Evidence of Casuarina Hybrids
Sep 14, 2009 |
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(PhysOrg.com) -- Hybrids of the invasive Australian plant species Casuarina exist in Florida, Agricultural Research Service (ARS) scientists and university cooperators have found.
Over time, an invasive plant loses its toxic edge
Sep 01, 2009 |
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Like most invasive plants introduced to the U.S. from Europe and other places, garlic mustard first found it easy to dominate the natives. A new study indicates that eventually, however, its primary weapon ...
Early detection sought for aquatic invasive weed Eurasian Watermilfoil
Jul 03, 2009 |
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(PhysOrg.com) -- Battling invasive plants is nothing new to Montanans, but a newcomer on the scene dwells in the water. This aquatic invader is called Eurasian watermilfoil. Fortunately, Montanans can take preventive action ...
Changing climate likely to make 'super weed' even more powerful
Jun 03, 2009 |
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Researchers at the University of Delaware have discovered a new reason why the tall, tasseled reed Phragmites australis is one of the most invasive plants in the United States.
Study predicts when invasive species can travel more readily by air
Biology /
Feb 25, 2009 |
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Global airlines be forewarned: June 2010 could be a busy month for invasive plants, insects and animals seeking free rides to distant lands.
Scientist names top 5 invasive plants threatening Southern forests in 2009
Jan 12, 2009 |
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U.S. Forest Service Southern Research Station (SRS) Ecologist Jim Miller, Ph.D., one of the foremost authorities on nonnative plants in the South, today identified the invasive plant species he believes pose the biggest threats ...
