Hydrilla verticillate (hydrilla), one of North America's most invasive species, has been found for the first time in Canada. Dr. Rebecca Rooney, a biology professor, and members of her Waterloo Wetland Laboratory were surveying ...
Plants & Animals
14 hours ago
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14
A new species of flatworm has been discovered and has already invaded several states in the southern United States. The particularity of the new species is that it looks a lot like Obama nungara, a species that has invaded ...
Plants & Animals
Sep 24, 2024
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44
When we walked with a colleague into an aspen forest near Madison, Wisconsin, in the early spring of 2021, we expected to finalize our plans for a research project on several species of insects that live and feed on the trees. ...
Ecology
Sep 19, 2024
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1
Freshwater ecosystems in Canada and around the world are under siege.
Ecology
Sep 19, 2024
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2
Invasive species are often looked upon with suspicion.
Ecology
Sep 19, 2024
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8
Globally, more than 13,000 plant species, equivalent to the entire native flora of Europe, have been naturalized outside their native ranges. A study, jointly conducted by scientists from China and the U.S., provides new ...
Plants & Animals
Sep 19, 2024
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19
A new study from the Institut de Ciències del Mar (ICM-CSIC) has demonstrated that public interest in the lionfish (Pterois miles), an invasive species native to the Indo-Pacific, is aiding in monitoring its spread nearly ...
Plants & Animals
Sep 18, 2024
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0
The golden jackal (Canis aureus) has rapidly expanded its range across Europe by thousands of kilometers. It has recently moved into new environments, reaching as far as north of the Arctic Circle in Finland and Norway, and ...
Plants & Animals
Sep 12, 2024
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28
A report on more than 40 years of research on Wisconsin lakes is highlighting some of the lessons scientists have learned about aquatic invasive species, including that far more ecosystems are playing host to non-native species ...
Ecology
Sep 5, 2024
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2
An invasive species of seagrass has been on a steady march across the world, taking over ecosystems well beyond its native waters of the Red Sea, Persian Gulf and Indian Ocean. Scientists have long wondered when it would ...
Plants & Animals
Sep 5, 2024
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17
Invasive 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.
This text uses material from Wikipedia, licensed under CC BY-SA
